Agents of food-borne zoonoses confirmed to parasitise newly-recorded in Thailand snails

Parasitic flatworms known as agents of food-borne zoonoses were confirmed to use several species of thiarid snails, commonly found in freshwater and brackish environments in southeast Asia, as their first intermediate host. These parasites can cause severe ocular infections in humans who consume raw or improperly cooked fish that have fed on infected snails.

Parasitic flatworms known as agents of food-borne zoonoses were confirmed to use several species of thiarid snails, commonly found in freshwater and brackish environments in southeast Asia, as their first intermediate host. These parasites can cause severe ocular infections in humans who consume raw or improperly cooked fish that have fed on infected snails. The study, conducted in South Thailand by Thai and German researchers and led by Kitja Apiraksena, Silpakorn University, is published in the peer-reviewed open-access journal Zoosystematics and Evolution.

“Trematode infections are major public health problems affecting humans in southeast Asia. Trematode infections depend not only on the habit of people, but also on the presence of first and second intermediate host species, resulting in the endemic spread of parasites, such as intestinal and liver flukes in Thailand”.

explain the scientists.

The snails of concern belong to the genus Stenomelania, have elongated and pointed shells and can be found near and in the brackish water environment of estuaries in the Oriental Region, from India to the Western Pacific islands. Worryingly enough, science does not know much else about these snails to date. Further, these species are hard to distinguish from related trumpet snails, because of the similarities in their shell morphology.

In order to provide some basic knowledge about the parasitic worms in Thailand and neighbouring countries, the research team collected a total of 1,551 Stenomelania snails, identified as four species, from streams and rivers near the coastline of the south of Thailand in Krabi, Trang and Satun Provinces. Of them, ten were infected with trematodes. The parasites were found at seven of the studied localities and belonged to three different species. In Krabi Province, the researchers observed all three species.

Speculating on their presence, the scientists suspect that it could be related to the circulation of sea currents, as the flow of water along the Andaman coast is affected by the monsoon season.

In conclusion, the researchers note that it is a matter of public health that further research looks into the biodiversity and biology of these snails, in order to improve our knowledge about the susceptibility of Stenomelania snails to food-borne zoonotic.

“This finding indicated that the resulting parasitic diseases are still largely neglected in tropical medicine, so further studies should be performed on the prevalence of various trematode-borne diseases in locations with snail occurrences in Thailand,”

they say.

Research article:

Apiraksena K, Namchote S, Komsuwan J, Dechraksa W, Tharapoom K, Veeravechsukij N, Glaubrecht M, Krailas D (2020) Survey of Stenomelania Fisher, 1885 (Cerithioidea, Thiaridae): The potential of trematode infections in a newly-recorded snail genus at the coast of Andaman Sea, South Thailand. Zoosystematics and Evolution 96(2): 807-819. https://doi.org/10.3897/zse.96.59448

Under Extinction Pressure: Rare Australian bee found after 100 years

A widespread field search for a rare Australian native bee (Pharohylaeus lactiferus) that had not been recorded for almost a century found the species has been there all along – but is probably under increasing pressure to survive. Prior to this study, only six individuals had been found, with the last published record of this Australian endemic bee species, from 1923 in Queensland.

Male Pharohylaeus lactiferus bee. Photo by James Dorey.

A widespread field search for a rare Australian native bee (Pharohylaeus lactiferus) that had not been recorded for almost a century found the species has been there all along – but is probably under increasing pressure to survive. Prior to this study, only six individuals had been found, with the last published record of this Australian endemic bee species, from 1923 in Queensland.

“This is concerning because it is the only Australian species in the Pharohylaeus genus and nothing was known of its biology,”

Flinders University researcher and biological sciences PhD candidate James Dorey says in the new scientific paper in the peer-reviewed, open-access Journal of Hymenoptera Research.

The ‘hunt’ began after bee experts Olivia Davies and Dr Tobias Smith raised the possibility of the species’ extinction based on the lack of any recent sightings. The ‘rediscovery’ followed an extensive sampling of 225 general and 20 targeted sampling sites across New South Wales and Queensland.

Along with extra bee and vegetation recordings from the Atlas of Living Australia, which lists 500 bee species in New South Wales and 657 in Queensland, the Flinders researchers sought to assess the latest levels of true diversity, warning that habitat loss and fragmentation of Australia’s rainforests, along with wildfires and climate change, are likely to put extinction pressure on this and other invertebrate species.  

“Three populations of P. lactiferous were found by sampling bees visiting their favoured plant species along much of the Australian east coast, suggesting population isolation,”

Mr Dorey reports.

Highly fragmented habitat and potential host specialisation might explain the rarity of P. lactiferus.

Additionally, the scientists remind of previous findings that Australia has already cleared more than 40% of its forests and woodlands since European colonisation, leaving much of the remainder fragmented and degraded.

“My geographical analyses used to explore habitat destruction in the Wet Tropics and Central Mackay Coast bioregions indicate susceptibility of Queensland rainforests and P. lactiferus populations to bushfires, particularly in the context of a fragmented landscape,”

Mr Dorey says.

The study also warns the species is even more vulnerable as they appear to favour specific floral specimens and were only found near tropical or sub-tropical rainforest – a single vegetation type.

“Collections indicate possible floral and habitat specialisation with specimens only visiting firewheel trees (Stenocarpus sinuatu), and Illawarra flame trees (Brachychiton acerifolius), to the exclusion of other available floral resources.”

Known populations of P. lactiferus remain rare and susceptible to habitat destruction (e.g. caused by changed land use or events such as fires), the paper concludes.

“Future research should aim to increase our understanding of the biology, ecology and population genetics of P. lactiferus.”

Female Pharohylaeus lactiferus bee. Photo by James Dorey.

“If we are to understand and protect these wonderful Australian species, we really need to increase biomonitoring and conservation efforts, along with funding for the museum curation and digitisation of their collections and other initiatives,”  

Mr Dorey says.

Research paper:

Dorey JB (2021) Missing for almost 100 years: the rare and potentially threatened bee, Pharohylaeus lactiferus (Hymenoptera, Colletidae). Journal of Hymenoptera Research 81: 165-180. https://doi.org/10.3897/jhr.81.59365

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Guest blog post: Unique feeding behaviour of Asian kukri snakes gutting frogs and toads

Guest blog post by Henrik Bringsøe

In September 2020, we reported the first evidence for a newly discovered behaviour in snakes, as we provided extensive photographic documentation, demonstrating a macabre feeding strategy of Asian kukri snakes of the species Oligodon fasciolatus, the Small-banded Kukri Snake: a snake cutting open the abdomen of a toad, inserting its head and pulling out the toad’s organs which are then swallowed.

A Small-banded Kukri Snake attacking a Painted Burrowing Frog, which is inflating its lungs. The snake makes rotations about its own longitudinal body axis (“death rolls”), as it is biting and holding the belly of the frog. Video by Navapol Komanasin.

This is done while the toad is alive and it may take several hours before it dies! We have now provided new evidence that two other species of kukri snakes also exhibit this highly unusual behaviour: Oligodon formosanus, the Taiwanese Kukri Snake, and Oligodon ocellatus, the Ocellated Kukri Snake. These three species are closely-related and belong to the same species group in the genus Oligodon.

On two occasions in Hong Kong, a Taiwanese Kukri Snake was observed eviscerating frogs of the species Kaloula pulchra, the Painted Burrowing Frog or Banded Bullfrog. In one case, the snake had cut open the belly of the frog and inserted its head deep into the frog’s abdomen. In this position, the snake performed repeated rotations about its own longitudinal body axis, also called “death rolls”! We believe that the purpose of these death rolls was to tear out organs to be subsequently swallowed. In the other case, the organs of the frog had been forced out of its abdomen.

A Taiwanese Kukri Snake with its head buried deep into the abdomen of a Painted Burrowing Frog. Initially, the frog moves its long fourth toe of the left hind foot up and down 21 times. During the subsequent active struggle, the snake makes three “death rolls”. Video by Jonathan Rotbart.

A Small-banded Kukri Snake was also observed eating a Painted Burrowing Frog in Northeast Thailand, but it swallowed the frog whole. That snake also performed death rolls, although we have never before seen that behaviour in this species of kukri snake (this species was treated in our 2020 paper). This frog is not considered toxic and is also eaten by other snakes. We believe that prey size is crucial in determining whether the gape width allows large prey to be swallowed whole by kukri snakes. If the prey is too large, the snake may eviscerate a frog or toad, in order to swallow the organs. Afterwards, the snake will perhaps be able to swallow the rest of the frog or toad.

In another new paper, we describe and illustrate the Ocellated Kukri Snake eating the toxic toad Asian Black-spotted Toad (Duttaphrynus melanostictus) in Vietnam. Initially, the large snake’s head was buried past its eyes into the abdomen of the toad, but eventually the snake swallowed the toad whole despite its toxicity. We interpret this behaviour that kukri snakes are in fact resistant to the toads’ cardiac glycoside toxins. Furthermore, toads are only eviscerated if they prove too large to be swallowed whole.

An Ocellated Kukri Snake first pierced this poisonous Asian common toad and buried its head deeply into the abdomen of the amphibian, as it was probably eating the organs. However, as seen in the photo, the kukri snake proceeded to swallow the toad whole. 
Photo by James Holden.

We suggest that the unique behaviour of eviscerating frogs and toads and eating their organs may have evolved specifically in a group of kukri snakes named the Oligodon cyclurus group or clade because it has now been recorded in three of its species, namely Oligodon fasciolatus, Oligodon formosanus and Oligodon ocellatus. We hope that future observations may uncover additional aspects of the fascinating feeding habits of kukri snakes though we may indeed call them gruesome.

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See more video recordings of the snakes’ unique, even if quite gruesome, behaviours provided as supplementary files to one of the discussed research papers.

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Follow Herpetozoa on Twitter and Facebook.

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Research papers: 

Bringsøe H, Suthanthangjai M, Suthanthangjai W, Lodder J, Komanasin N (2021) Gruesome twosome kukri rippers: Oligodon formosanus (Günther, 1872) and O. fasciolatus (Günther, 1864) eat Kaloula pulchra Gray, 1831 either by eviscerating or swallowing whole. Herpetozoa 34: 49-55. https://doi.org/10.3897/herpetozoa.34.e62688

Bringsøe H, Holden J (2021) Yet another kukri snake piercing an anuran abdomen: Oligodon ocellatus (Morice, 1875) eats Duttaphrynus melanostictus (Schneider, 1799) in Vietnam. Herpetozoa 34: 57-59. https://doi.org/10.3897/herpetozoa.34.e62689

New DNA barcoding project aims at tracking down the “dark taxa” of Germany’s insect fauna

New dynamic article collection at Biodiversity Data Journal is already accumulating the project’s findings

About 1.4 million species of animals are currently known, but it is generally accepted that this figure grossly underestimates the actual number of species in existence, which likely ranges between five and thirty million species, or even 100 million. 

Meanwhile, a far less well-known fact is that even in countries with a long history of taxonomic research, such as Germany, which is currently known to be inhabited by about 48,000 animal species, there are thousands of insect species still awaiting discovery. In particular, the orders Diptera (flies) and Hymenoptera (especially the parasitoid wasps) are insect groups suspected to contain a strikingly large number of undescribed species. With almost 10,000 known species each, these two insect orders account for approximately two-thirds of Germany’s insect fauna, underlining the importance of these insects in many ways.

The conclusion that there are not only a few, but so many unknown species in Germany is a result of the earlier German Barcode of Life projects: GBOL I and GBOL II, both supported by the German Federal Ministry of Education and Research (Bundesministerium für Bildung und Forschung, BMBF) and the Bavarian Ministry of Science under the project Barcoding Fauna Bavarica. 

In its previous phases, GBOL aimed to identify all German species reliably, quickly and inexpensively using DNA barcodes. Since the first project was launched twelve years ago, more than 25,000 German animal species have been barcoded. Among them, the comparatively well-known groups, such as butterflies, moths, beetles, grasshoppers, spiders, bees and wasps, showed an almost complete coverage of the species inventory.

In 2020, another BMBF-funded DNA barcoding project, titled GBOL III: Dark Taxa, was launched, in order to focus on the lesser-known groups of Diptera and parasitoid Hymenoptera, which are often referred to as “dark taxa”. The new project commenced at three major German natural history institutions: the Zoological Research Museum Alexander Koenig (Bonn), the Bavarian State Collection of Zoology (SNSB, Munich) and the State Museum of Natural History Stuttgart, in collaboration with the University of Würzburg and the Entomological Society Krefeld. Together, the project partners are to join efforts and skills to address a range of questions related to the taxonomy of the “dark taxa” in Germany.

As part of the initiative, the project partners are invited to submit their results and outcomes in the dedicated GBOL III: Dark Taxa article collection in the peer-reviewed, open-access Biodiversity Data Journal. There, the contributions will be published dynamically, as soon as approved and ready for publication. The articles will include taxonomic revisions, checklists, data papers, contributions to methods and protocols, employed in DNA barcoding studies with a focus on the target taxa of the project.

“The collection of articles published in the Biodiversity Data Journal is an excellent approach to achieving the consortium’s goals and project partners are encouraged to take advantage of the journal’s streamlined publication workflows to publish and disseminate data and results that were generated during the project,”

says the collection’s editor Dr Stefan Schmidt of the Bavarian State Collection of Zoology.

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Find and follow the dynamic article collection GBOL III: Dark Taxa in Biodiversity Data Journal.

Follow Biodiversity Data Journal on Twitter and Facebook.

Failure to respond to a coral disease epizootic in Florida: causes and consequences

By 2020, losses of corals have been observed throughout Florida and into the greater Caribbean basin in what turned out to be likely the most lethal recorded case of Stony Coral Tissue Loss Disease. A Perspectives paper, published in the open-access peer-reviewed journal Rethinking Ecology, provides an overview of how Florida ended up in a situation, where the best that could be done is rescuing genetic material from coral species at risk of regional extinction.

Guest blog post by William F. Precht

A colony of the large grooved brain coral, Colpophyllia natans, infected by Stony Coral Tissue Loss Disease. The photo shows the progressive, rapid advance of disease, left-to-right, across the colony.
Image by William Precht.

Dredging projects conducted in association with coral reefs typically generate concern by environmental groups, resulting in careful monitoring by government agencies. Even though the aim of those dredge projects is to widen or deepen existing ship channels, while minimizing damage to coral reef resources, there are often the intuitive negative assumptions that dredging kills corals.

The recent Port Miami Dredge Project started as an uncomplicated case story. However, significant problems arose, caused by a concurrent and unprecedented coral disease epidemic that killed large numbers of corals, which was initiated following a regional thermal anomaly and coral bleaching event.

The coral disease, known as Stony Coral Tissue Loss Disease (SCTLD), was first observed in September 2014 near Virginia Key, Florida. In roughly six years, the disease has spread throughout Florida and into the greater Caribbean basin. The high prevalence of SCTLD and the resulting high mortality in coral populations, coupled with the large number of susceptible species affected, suggest that this disease outbreak is one of the most lethal ever recorded on contemporary coral reefs. The disease is still presently active and continues to ravage coral reefs throughout the region.

The initial response to this catastrophic disease by resource managers with purview over the ecosystem in Southeast Florida was slow. There is generally a noticeably short window of opportunity to intervene in disease amelioration or eradication in the marine environment. This slow response enabled the disease to spread unchecked. Why was the response to the loss of our coral reefs to a coral disease epidemic such a massive failure? This includes our failure as scientists, regulators, resource managers, local media, and policy makers alike. With this Perspectives paper, published in Rethinking Ecology, my intention was to encapsulate the numerous reasons for our failures during the first few years of the outbreak, reminiscent of the early failures in the U.S. response to the COVID-19 pandemic.

First, the Port Miami dredging project was ongoing when the coral disease epidemic began. Some managers and local environmental groups blamed dredging, rather than SCTLD for the coral losses, reported in the project’s compliance monitoring program. Second, this blame was amplified in the media, because dredging projects are intuitively assumed to be bad for coral reefs. Third, during this same time, the State of Florida prohibited government employees from acknowledging global warming in their work. This was problematic because ocean warming is a proximal cause of many coral diseases.

As a result, some managers ignored the well-known links between warming and coral disease. A consequence of this policy was that the dredging project provided an easy target to blame for the coral mortality noted in the monitoring program, despite convincing data that suggested otherwise. 

Specifically, the intensive compliance monitoring program, conducted by trained scientific divers, was statistically significant. SCTLD that was killing massive numbers of corals throughout the region was also killing corals at the dredge site. Further, this was happening in the same proportions and among the same suite of species. 

Finally, when the agencies responded to the outbreak, their efforts were too little and much too late to make a meaningful difference. While eradication of the disease was never a possibility, early control measures may have slowed its spread, or allowed for the rescue of significant numbers of large colonies of iconic species. Because of the languid management response to this outbreak, we are now sadly faced with a situation where much of our management efforts are focused on the rescue of genetic material from coral species already at risk of regional extinction.

The delayed response to this SCTLD outbreak in Southeast Florida has many similarities to the COVID-19 pandemic response in the United States and there are lessons learned from both that will improve disease response outcomes in the future, to the benefit of coral reefs and human populations.

Publication:

Precht W (2021) Failure to respond to a coral disease epizootic in Florida: causes and consequences. Rethinking Ecology 6: 1-47. https://doi.org/10.3897/rethinkingecology.6.56285

Eurasian eagle owl diet reveals new records of threatened giant bush-crickets

Bird diets provide a real treasure for research into the distribution and conservation of their prey, conclude scientists after studying the Eurasian Eagle Owl in southeastern Bulgaria. In their paper, published in the open-access, peer-reviewed journal Travaux du Muséum National d’Histoire Naturelle “Grigore Antipa”, they report the frequent presence of the threatened Big-Bellied Glandular Bush-Cricket, and conclude that studies on the Eurasian Eagle Owl could be used to identify biodiversity-rich areas in need of protection.

Male specimen of the Big-Bellied Glandular Bush-Cricket (Bradyporus macrogaster)
Photo by Dragan Chobanov

Bird diets provide a real treasure for research into the distribution and conservation of their prey, such as overlooked and rare bush-cricket species, point out scientists after studying the diet of the Eurasian Eagle Owl (Bubo bubo) in southeastern Bulgaria.

In their paper, published in the open-access, peer-reviewed journal Travaux du Muséum National d’Histoire Naturelle “Grigore Antipa”, Dr Dragan Chobanov (Institute of Biodiversity and Ecosystem Research, Bulgaria) and Dr Boyan Milchev (University of Forestry, Bulgaria) report the frequent presence of the threatened with extinction Big-Bellied Glandular Bush-Cricket (Bradyporus macrogaster) in the diet of Eurasian Eagle Owls, and conclude that the predatory bird could be used to identify biodiversity-rich areas in need of protection.

While the Balkan Peninsula has already been recognised as the area with the highest diversity of orthopterans (grasshoppers, crickets and bush-crickets) in Europe and one of the generally most biologically diverse areas in the whole Palearctic realm, it is also home to a worrying number of threatened species. Additionally, a thorough and updated country assessment of the conservation status of the orthopterans found in Bulgaria is currently lacking. This is why the Bulgarian team undertook a study on the biodiversity of these insects by analysing food remains from pellets of Eurasian Eagle Owls, collected from 53 breeding sites in southeastern Bulgaria.

As a result, the scientists reported three species of bush crickets that have become a significant part of the diet of the studied predatory birds. Curiously enough, all three species are rare or threatened in Bulgaria. The case of the Big-Bellied Glandular Bush-Cricket is of special concern, as it is a species threatened by extinction. Meanwhile, the local decline in mammals and birds that weigh between 0.2 and 1.9 kg, which are in fact the preferred prey for the Eurasian Eagle Owl, has led the highly opportunistic predator to increasingly seek large insects for food. The researchers even suspect that there might be more overlooked species attracting the owls.

Taking into account the hereby reported interconnected inferences of conservation concern, as well as the vulnerability of the Big-Bellied Glandular Bush-Cricket, a species with a crucial role in the food chain, the scientists call for the newly provided data to prompt the designation of a new Natura 2000 site. Additionally, due to the species’ requirements for habitats of low disturbance and high vegetation diversity, and its large size and easy location via singing males, they point out that it makes a suitable indicator for habitat quality and species community health.

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Original source:

Chobanov D, Milchev B (2020) Orthopterans (Insecta: Orthoptera) of conservation value in the Eurasian Eagle Owl Bubo bubo food in Bulgaria. Travaux du Muséum National d’Histoire Naturelle “Grigore Antipa” 63(2): 161-167. https://doi.org/10.3897/travaux.63.e53867

King of the Cave: New centipede on top of the food chain in the sulphurous-soaked Movile

A new species of endemic, troglobiont centipede was discovered by an international team of scientists in the Romanian cave Movile: a unique underground ecosystem, isolated several millions years ago during the Neogene, whose animal life only exists because of the chemosynthetic bacteria. As the largest Movile’s inhabitant, the new species can easily be crowned as the ‘king’ of this ‘hellish’ ecosystem. Aptly named Cryptops speleorex, the cave-dweller is described in the open-access, peer-reviewed journal ZooKeys.

A photo of the newly discovered species (Cryptops speleorex), the largest inhabitant of the Movile cave (Romania) known to date
Photo by Mihai Baciu

Deemed to never see the light of the day, a new species of endemic, troglobiont centipede was discovered by an international team of scientists in the Romanian cave Movile: a unique underground ecosystem, where the oxygen in the air might be half of the amount of what we’re used to, yet the sulphurous abounds; and where the animal life only exists because of chemosynthetic bacteria feeding on carbon dioxide and methane.

This hellish ecosystem–where breathing alone could be lethal for most of us–seems to have finally crowned its king. At a size of between 46 and 52 mm in length, the centipede Cryptops speleorex is the largest of the cave’s inhabitants known to date. The new species is described in the open-access, peer-reviewed journal ZooKeys.

Already isolated from the outside world several millions years ago during the Neogene, the Movile cave has been drawing the attention of scientists ever since its unexpected discovery in 1986 by Romanian workers, searching for locations suitable for building a power plant in the southeastern parts of the country.

Surprisingly enough, despite its harsh living conditions, the Movile ecosystem was soon found to harbor a diverse and unique fauna, characterised by exceptional species endemism and specific trophic links. So far, the cave has been known to give home to the troglobiont water scorpion, liocranid and nesticid spiders, cave leeches and certainly many more yet to be discovered.

In fact, it was long thought that this unique underground ecosystem was also inhabited by surface-dwelling species widespread in Europe. Convinced that this scenario is highly unlikely, scientists Dr Varpu Vahtera (University of Turku, Finland), Prof Pavel Stoev (National Museum of Natural History, Bulgaria) and Dr Nesrine Akkari (Museum of Natural History Vienna, Austria) decided to examine a curious centipede, collected by speleologists Serban Sarbu and Alexandra Maria Hillebrand, during their recent expedition to Movile.

“Our results confirmed our doubts and revealed that the Movile centipede is morphologically and genetically different, suggesting that it has been evolving from its closest surface-dwelling relative over the course of millions of years into an entirely new taxon that is better adapted to life in the never-ending darkness,” explain the researchers.

“The centipede we described is a venomous predator, by far the largest of the previously described animals from this cave. Thinking of its top rank in this subterranean system, we decided to name the species Cryptops speleorex, which can be translated to the “King of the cave”, they add.

The scientists exploring the Movile cave (Romania)
Photo by Mihai Baciu

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Original Source:

Vahtera V, Stoev P, Akkari N (2020) Five million years in the darkness: A new troglomorphic species of Cryptops Leach, 1814 (Chilopoda, Scolopendromorpha) from Movile Cave, Romania. ZooKeys 1004: 1-26. https://doi.org/10.3897/zookeys.1004.58537

Scientists took a rare chance to prove we can quantify biodiversity by ‘testing the water’

Recent study conducted at a UK fishery farm provides new evidence that DNA from water samples can accurately determine fish abundance and biomass

Organisms excrete DNA in their surroundings through metabolic waste, sloughed skin cells or gametes, and this genetic material is referred to as environmental DNA (eDNA).

As eDNA can be collected directly from water, soil or air, and analysed using molecular tools with no need to capture the organisms themselves, this genetic information can be used to report biodiversity in bulk. For instance, the presence of many fish species can be identified simultaneously by sampling and sequencing eDNA from water, while avoiding harmful capture methods, such as netting, trapping or electrofishing, currently used for fish monitoring.

While the eDNA approach has already been applied in a number of studies concerning fish diversity in different types of aquatic habitats: rivers, lakes and marine systems, its efficiency in quantifying species abundance (number of individuals per species) is yet to be determined. Even though previous studies, conducted in controlled aquatic systems, such as aquaria, experimental tanks and artificial ponds, have reported positive correlation between the DNA quantity found in the water and the species abundance, it remains unclear how the results would fare in natural environments.

However, a research team from the University of Hull together with the Environment Agency (United Kingdom), took the rare opportunity to use an invasive species eradication programme carried out in a UK fishery farm as the ultimate case study to evaluate the success rate of eDNA sampling in identifying species abundance in natural aquatic habitats. Their findings were published in the open-access, peer-reviewed journal Metabarcoding and Metagenomics.

“Investigating the quantitative power of eDNA in natural aquatic habitats is difficult, as there is no way to ascertain the real species abundance and biomass (weight) in aquatic systems, unless catching all target organisms out of water and counting/measuring them all,”

explains Cristina Di Muri, PhD student at the University of Hull.
Drained pond after fish translocation.
Photo by Dr. Watson H.V.

During the eradication, the original fish ponds were drained and all fish, except the problematic invasive species: the topmouth gudgeon, were placed in a new pond, while the original ponds were treated with a piscicide to remove the invasive fish. After the eradication, the fish were returned to their original ponds. In the meantime, all individuals were counted, identified and weighed from experts, allowing for the precise estimation of fish abundance and biomass.

“We then carried out our water sampling and ran genetic analysis to assess the diversity and abundance of fish genetic sequences, and compared the results with the manually collected data. We found strong positive correlations between the amount of fish eDNA and the actual fish species biomass and abundance, demonstrating the existence of a strong association between the amount of fish DNA sequences in water and the actual fish abundance in natural aquatic environments,”

reports Di Muri.
Environmental DNA sampling using water collection bottles
Photo by Dr. Peirson G.

The scientists successfully identified all fish species in the ponds: from the most abundant (i.e. 293 carps of 852 kg total weight) to the least abundant ones (i.e. one chub of 0.7 kg), indicating the high accuracy of the non-invasive approach.

“Furthermore, we used different methods of eDNA capture and eDNA storage, and found that results of the genetic analysis were comparable across different eDNA approaches. This consistency allows for a certain flexibility of eDNA protocols, which is fundamental to maintain results comparable across studies and, at the same time, choose the most suitable strategy, based on location surveyed or resources available,”

elaborates Di Muri.

“The opportunity of using eDNA analysis to accurately assess species diversity and abundance in natural environments will drive a step change in future species monitoring programmes, as this non-invasive, flexible tool is adaptable to all aquatic environments and it allows quantitative biodiversity surveillance without hampering the organisms’ welfare.”

***

Original publication:

Di Muri C, Lawson Handley L, Bean CW, Li J, Peirson G, Sellers GS, Walsh K, Watson HV, Winfield IJ, Hänfling B (2020) Read counts from environmental DNA (eDNA) metabarcoding reflect fish abundance and biomass in drained ponds. Metabarcoding and Metagenomics 4: e56959. https://doi.org/10.3897/mbmg.4.56959

🎉Celebration time: here’s to 1,000 issues of ZooKeys!

With the 1,000th ZooKeys issue now hot off the press, the time has come to celebrate the millennium of Pensoft’s very first scientific journal: ZooKeys!

With the 1,000th ZooKeys issue now hot off the press, the time has come to celebrate the millennium of Pensoft’s very first scientific journal: ZooKeys!

In fact, the cause for celebration is two-fold: this year, it’s also the 10th anniversary of ZooKeys’ very special 50th issue, which marked a new era for biodiversity data publishing by introducing several innovative workflows and tools. This is when ZooKeys became an example to follow globally: a title the journal still takes pride to be holding to this day.

Articles published in ZooKeys since the journal’s launch in 2008 (data from 3/12/2020).

Today, we shall reminisce about everything along the way: from that sunny Californian morning at the Entomological Society of America meeting in 2007, where the idea about a new-age taxonomic journal in zoology sprang up in a breakfast chat between renowned entomologists and future founders of ZooKeys: Prof Lyubomir Penev and Dr Terry Erwin, to this very moment, where we’re counting over 5,500 published articles, authored by more than 8,000 researchers from 144 countries and comprising ~150,000 pages. Thus, we saw the description of one supertribe, seven tribes, five subtribes, 27 families, over 800 genera and more than 12,000 species previously unknown to science. In this journey, ZooKeys climbed up the ladder of academic rigour and trustability to become today’s most prolific open-access journal of zoology.

Even though today is the time to feel exalted and look back on our achievements and conquered milestones with ear-to-ear smiles, it is with heavy hearts that we’ll be raising our glasses tonight, as we won’t be joined by our beloved friend and founding Editor-in-Chief, Dr Terry Erwin, whom we lost on 11th May 2020. While his place in our hearts and ZooKeys’ Editorial board will never be filled, we accept our duty to help for his legacy to persist for the future generations of scientists by taking a vow to never lower our standards or cease to improve our services and care for our readers, authors, reviewers and editors alike. 

In honour of Terry, who will be remembered for his splendid personality and zealous enthusiasm for carabid beetles and the world’s immense biodiversity, we’ve opened up a special memorial volume to be published on 11th May 2021.

In fact, we have thousands of people to thank for the place ZooKeys is at right now: these are our authors, who have trusted us with their research work time and time again; our reviewers and editors, who have taken their invaluable time to promptly process submitted manuscripts; and, of course, our readers, who are using ZooKeys content to expand the world’s knowledge, either by learning and building on the findings in their own research, or by spreading the knowledge to those who will.

With a thought for our authors & readers

We’ve been striving to implement the latest and most convenient scholarly publishing technologies and innovations, and also develop some of our own to make sure that ZooKeys users enjoy their experience with our flagship journal. 

In hindsight, ZooKeys was the first journal to pioneer a lot of scholarly publishing technologies, which back in the time were quite revolutionary. Notable examples from 2008-2016 include: 

Yet, this was only the beginning. Fast forward to December 2020, we’re working even harder to build up on our achievements and evolve, so that we stay on top of our game and the scholarly publishing scene. Here are the key innovations we recently implemented in ZooKeys:

With a thought for our editors

Besides revolutionising research publishing, at Pensoft, we’re also deeply devoted to facilitating our editors in their day-to-day editorial work, as well as their long-term engagement with the journal and its progress. 

Recently, we expanded journal performance reporting services, in order to keep our editors on track with the most recent trends in their journal’s performance. Meanwhile, we’ve also taken care after the continuous improvement in those stats by implementing several features meant to facilitate and expedite the handling of manuscripts.

Follow ARPHA’s blog to keep up with the new features available to users of Pensoft’s journals and all journals hosted on ARPHA Platform.  

With a thought for the community

Naturally, research outputs are only as valuable to publish as they are valuable to the community: within and beyond academia. Ultimately, their merit is best measured by citations and readership. This is why, we shall now have a look back at the most impactful papers published in ZooKeys to date.

Author’s delight

Thanks to the indexation of ZooKeys in the research citation database of Dimensions, following the collaboration between ARPHA and Digital Science, which started in 2018, we’re now able to explore the all-time most cited publications in our flagship journal. Detailed information and links to the papers where each of those studies has been cited is available on the webpage of the article.

  1. Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool (DOI: 10.3897/zookeys.150.2109)
  2. Family-group names in Coleoptera (Insecta) (DOI: 10.3897/zookeys.88.807)
  3. Amendment of Articles 8, 9, 10, 21 and 78 of the International Code of Zoological Nomenclature to expand and refine methods of publication (DOI: 10.3897/zookeys.219.3944)  
  4. Forty years of carabid beetle research in Europe – from taxonomy, biology, ecology and population studies to bioindication, habitat assessment and conservation (DOI: 10.3897/zookeys.100.1523
  5. Useful model organisms, indicators, or both? Ground beetles (Coleoptera, Carabidae) reflecting environmental conditions (DOI: 10.3897/zookeys.100.1533

Reader’s delight

Thanks to ARPHA Platform’s all-roundedness and transparency, we get to explore the most read papers ever published in ZooKeys straight from the Articles section on the journal’s website.

  1. Taxonomic revision of the olingos (Bassaricyon), with description of a new species, the Olinguito (DOI: 10.3897/zookeys.324.5827)

In 2013, ZooKeys had the honour to announce the first carnivore found in the Western Hemisphere in over three decades. Further, that wasn’t ANY carnivore, but the olinguito, which National Geographic rightfully called a “fuzzy fog-dweller with a face like a teddy bear”.

  1. An extraordinary new family of spiders from caves in the Pacific Northwest (Araneae, Trogloraptoridae) (DOI: 10.3897/zookeys.215.3547)

A year prior to the description of the olinguito, a brand new family of “cave robbing” spiders emerged from the pages of ZooKeys, after US scientists found a previously unknown to science spider with “unique, toothed claws at the end of each leg” in Oregon.

  1. Family-Group Names In Coleoptera (Insecta) (DOI: 10.3897/zookeys.88.807)

A huge, first-of-its-kind catalogue containing data on all family-group names for all known extant and fossil beetles (order Coleoptera) was published in ZooKeys in an exemplary research collaboration, spanning three continents in 2011.

  1. Review of Neopalpa Povolný, 1998 with description of a new species from California and Baja California, Mexico (Lepidoptera, Gelechiidae) (DOI: 10.3897/zookeys.646.11411)

In a truly world-wide sensation, a new species of tiny moth inhabiting a narrow stretch of extremely fragile habitat running between the USA and Mexico, was named after then President-elect Donald Trump in a desperate call to protect this and other similarly vulnerable ecosystems in North America. The species currently goes by the name Neopalpa donaldtrumpi.

  1. Taxonomic revision of the tarantula genus Aphonopelma Pocock, 1901 (Araneae, Mygalomorphae, Theraphosidae) within the United States (DOI: 10.3897/zookeys.560.6264)

In 2016, US scientists described a total of 14 new to science tarantula species from what many would think to be one the best-researched countries: the United States of America. Curiously enough, one of those tarantula species, found in California near Folsom Prison – a place best known from Cash’s song “Folsom Prison Blues”, was aptly named Aphonopelma johnnycashi.  

Public’s delight

As visionaries, we’ve long realised that scientific impact goes beyond citations and journal subscribers. Communicating science to the community beyond academia is, in fact, one of the strongest components in research dissemination, as it lets the laypeople make sense of the wider world and where exactly they stand in the bigger picture. This is why we’ve been putting that special extra effort to promote research published in our journals–including ZooKeys–using press releases, blog posts and social media content (follow ZooKeys on Twitter and Facebook).

Data source: Altmetric.

Thanks to our partnership with Altmetric, we’re able to identify the top five most popular papers from ZooKeys for all times. These are the ones that have sparkled the most online discussions via social media, big news headlines, blog posts, Wikipedia and more.

  1. Review of Neopalpa Povolný, 1998 with description of a new species from California and Baja California, Mexico (Lepidoptera, Gelechiidae) (DOI: 10.3897/zookeys.646.11411)

Not only was the previously undescribed species of moth subject to a serious threat of extinction, having been exclusively known from a fragmented area along the Mexico–United States border, but the insect’s “hairstyle” was pointed out to bear a striking resemblance to the golden locks of the 45th U.S. President Donald Trump.

Credit: CNN (read the full news story here)
  1. Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco (DOI: 10.3897/zookeys.928.47517)

Published in ZooKeys earlier this year, this extensive geology and paleontology monograph presents an unprecedented in its volume and scientific value account of a large portion of the most important prehistoric vertebrate fossils ever unearthed from the famous Kem Kem beds in Morocco. “A monograph larger than Paralititan,” as a Reddit user justly pointed out.

  1. Taxonomic revision of the tarantula genus Aphonopelma Pocock, 1901 (Araneae, Mygalomorphae, Theraphosidae) within the United States (DOI: 10.3897/zookeys.560.6264)

On top of taking pride in becoming the discoverer of as many as 14 tarantula species living “right under our noses” in the US, Dr Chris Hamilton enjoyed the spotlight of Live television in his appearance on Sky News. So did a lucky specimen of the newly described species: Aphonopelma johnnycashi! Suffice it to say, the tarantula was named after the legendary American singer-songwriter for all the right reasons.

Credit: Sky News (read the full news story here)
  1. Colobopsis explodens sp. n., model species for studies on “exploding ants” (Hymenoptera, Formicidae), with biological notes and first illustrations of males of the Colobopsis cylindrica group (DOI: 10.3897/zookeys.751.22661)

Apparently, ants that rip their bodies apart in a self-sacrificial attempt to save their colonies from enemies, weren’t something new by the time PhD student Alice Laciny and her team described the new to science species Colobopsis explodens from Brunei. However, the study published in ZooKeys in 2018 was the first to conduct and film experiments on the peculiar exploding behaviour. Although not the very first for science, C. explodens was the first “T-ant-T” species to be described since 1935.

  1. Mapping the expansion of coyotes (Canis latrans) across North and Central America (DOI: 10.3897/zookeys.759.15149)

Today, coyotes live all around North America: from Alaska to Panama, California to Maine. Once upon a time, or rather, between the Holocene and the early 1900s, their range used to be restricted to the arid west of North America. So, how did the coyotes turn up at the doorstep of South America? North Carolina scientists reached to natural history collections to map the historic colonisation of the coyotes all the way to our days.

***

In our final remarks on this special occasion, it’s the time to say a special Thank you! to our most prolific authors:

  1. Dr Shuqiang Li, expert on spider taxonomy and systematics at the Chinese Academy of Sciences, who’s also a reviewer and a subject editor at ZooKeys (64 publications).
  2. Dr Michael S. Engel, paleontologist and entomologist at the University of Kansas and the American Museum of Natural History, who is also amongst the top five most active reviewers and the three most active subject editors in ZooKeys (59 publications).
  3. Dr Li-Zhen Li, coleopterist at Shanghai Normal University (57 publications).
  4. Dr Reginald Webster, coleopterist at Natural Resources Canada and a reviewer at ZooKeys (57 publications).
  5. Dr Sergei Golovatch, myriapodologist at the Russian Academy of Sciences, and a reviewer and a subject editor at ZooKeys (53 publications).

As well as to our most active reviewers:

  1. Dr Yuri Marusik, arachnologist at the Russian Academy of Sciences and the University of Free State, Magadan, South Africa. He is also a subject editor at ZooKeys.
  2. Dr Donald Lafontaine, entomologist at the Canadian National Collection of Insects, Arachnids, and Nematodes and Agriculture and Agri-Food Canada. He is also a subject editor at ZooKeys
  3. Dr Ivan H. Tuf, ecologist at Palacký University (Czech Republic) and a subject editor at ZooKeys.
  4. Dr Viatcheslav Ivanenko, taxonomist at the Lomonosov Moscow State University.
  5. Dr Michael S. Engel, paleontologist and entomologist at the University of Kansas and the American Museum of Natural History, and also one of the most productive authors and most active subject editors at ZooKeys.

And ZooKeysmost active editors:

  1. Prof Pavel Stoev, taxonomist, ecologist, and director at the National Natural History Museum (Bulgaria), and managing editor at ZooKeys.
  2. Prof Lyubomir Penev, entomologist, ecologist at the Bulgarian Academy of Sciences and founder of ZooKeys.
  3. Dr Michael S. Engel, paleontologist and entomologist at the University of Kansas and the American Museum of Natural History, and also one of the most productive authors and most active reviewers at ZooKeys.
  4. Dr Nina Bogutskaya, hydrobiologist and ichthyologist at the Museum of Natural History Vienna, and also a reviewer at ZooKeys.
  5. Dr Jeremy Miller, taxonomist and arachnologist at the Naturalis Biodiversity Center (Netherlands), and also a reviewer at ZooKeys.

Looking forward to sharing with you our next milestones and celebrations!

Meanwhile, make sure to follow ZooKeys on Twitter and Facebook to stay in touch!

All articles published in Pensoft journals at your fingertips with the Researcher app

Following a recent integration with the novel, social network-style research discovery app Researcher, the scholarly platform ARPHA has taken yet another step to ensure scholarly publications from across its open-access, peer-reviewed journal portfolio are as easy to find and read as possible. Now, research papers published in all Pensoft’s and all other journals hosted on ARPHA Platform can reach the 1.8 million current users of Researcher directly on their smartphones.

Following a recent integration with the novel, social network-style research discovery app Researcher, the scholarly publishing platform ARPHA has taken yet another step to ensure scholarly publications from across its open-access, peer-reviewed journal portfolio are as easy to find and read as possible. Now, research papers published in all Pensoft’s, as well as all other journals hosted on ARPHA, can reach the 1.8 million current users of Researcher directly on their screens.

Similarly to the world’s best known and used social media networks: Twitter, LinkedIn and Facebook, Researcher allows its users, scientists and academics, to follow their favourite scholarly journals and topics, in order to receive their content in a personalised newsfeed format, either on their phones or computers. Thus, they can stay up to date with the latest research in their scientific fields by simply scrolling down: much like what they are already used to in their everyday life outside academia. 

Similarly to the well-known social network apps, Researcher lets users bookmark papers to go back to later on and even invite friends to join the platform. Furthermore, the users can also synchronise their accounts with their ORCID iDs, in order to load their own papers on their profiles on Researcher. 

The Researcher app fetches new publications from all indexed journals several times a day, thus ensuring that a user’s newsfeed is updated in almost real time. Now, the ARPHA-hosted journals have joined the 17,000 academic outlets from across the sciences already sharing their publications on the app.

“At Pensoft, we are perfectly aware that good and open science practices go far beyond cost-free access to research articles. In reality, Open Science is also about easier findability and reusability, that is the probability one stumbles across a particular research publication, and consequently, cite and build on the findings in his/her own studies. By indexing our journals with Researcher, we’re further facilitating the discoverability of their content to the benefit of the authors who trust us with their work,”

says ARPHA’s and Pensoft’s founder and CEO Prof. Lyubomir Penev.

“We share ARPHA’s belief that Open Science means more than just free access – it means giving scholarly and scientific content the best chance to get in front the right reader at the right time. Our mission is to make sure that scientists and researchers never miss vital research. This partnership will ensure that distribution to our users across the world is built into the ARPHA platform – boosting discoverability and smoothing the path to impact,”

adds Olly Cooper, CEO of Researcher.

Follow ARPHA on Twitter and LinkedIn.