NEWSLETTER 08/2021 06.08.2021
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Please acknowledge use of the database www.shark-references.com in your publications, and cite:
Pollerspöck, J. & Straube, N. 2021, Bibliography database of living/fossil sharks, rays and chimaeras (Chondrichthyes: Elasmobranchii, Holocephali), www.shark-references.com, World Wide Web electronic publication, Version 2021 |
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NEWS/ OWN RESEARCH
ADJUSTMENT OF CITATION STYLE IN SHARK REFERENCES We started to change our old (and unique!) citation style to adapt to the APA citation style (for information please see: https://www.mendeley.com/guides/apa-citation-guide) to make the usage of references listed in shark references easier and more compatible with a widely accepted reference style adopted by several international scientific journals. The transition is ongoing, so far 9000 references are changed. In particular this means that the former style of this example: VILLATE‐MORENO, M. & POLLERSPÖCK, J. & KREMER‐OBROCK, F. & STRAUBE, N. (2021) Molecular analyses of confiscated shark fins reveal shortcomings of CITES implementations in Germany. Conservation Science and Practice, 3 (6): e398 DOI: 10.1111/csp2.398now looks like: Villate‐Moreno, M. & Pollerspöck, J. & Kremer‐Obrock, F. & Straube, N. (2021)Molecular analyses of confiscated shark fins reveal shortcomings of CITES implementations in Germany. Conservation Science and Practice, 3(6), Article e398DOI: 10.1111/csp2.398------------------------------------------------------------------------------------------------------------------------
New database report published by team shark-references!
- You want to know how many species of sharks, rays and chimaeras there are?
- You want to know the distribution of species among the orders or families?
- You want to know the references of the first descriptions?
- You want a list of all sharks, rays and chimaeras ever described with their synonyms?
Our new data report can answer all these questions for you!
Abstract: The table and provided download links below are intended for informational use in Chondrichthyan research. The allocation aims for faciliating to find species numbers and most recent information on taxonomic changes. We will regularly update the table and download links at lest twice annually. The updates will be announced on facebook ( https://www.facebook.com/sharkreferences) and in our monthly newsletter (sign up here: https://eepurl.com/sJNGb). The Excel sheet allows for the application of individual filter- and sorting options. The list of described spsecies complements taxonomic information for the list of valid species by providing synonyms and / or new taxonomic combinations.
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NEW PARTNERS OF SHARK-REFERENCES
Would you like to become a shark-reference partner? Please contact us per E-mail!
Partner in Google-Maps:
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New Images
Many thanks to the following people for providing images:
Mike Everhart, Sternberg Museum of Natural History for some images of Ptychodus occidentalis Leidy, 1868
Cordova, J.A. & David Ebert for a image of the holotype of the new described species Apristurus manocheriani Cordova & Ebert, 2021 |
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Missing papers:
Many thanks to all friends of shark-references, who sent us some missing papers last month!
Shark-References would kindly like to ask you for your contribution to this project.
At the moment we are looking for some of the following papers:
Extinct Chondrichthyes:
MATSUMOTO, H. (1936) Upper Miocene vertebrates from Kumanodô, Natori district, province of Rikuzen. Dobutsugaku Zasshi, 48: 475–480, 5 fig.
ALVINERIE, J. & ANDREIEFF, P. & ANGLADA, R. & AUBERT, J. & CAPPETTA, H. & CARALP, M. & CARATINI, C. & CARBONNEL, G. & CATZIGRAS, F. & COURME-RAULT, M.-D. & CHATEAUNEUF, J.-J. & DEMARCQ, G. & DUCASSE, O. & FATTON, E. & GLAÇON, G. & LABRACHERIE, M. & LAURIAT, A. & LE CALVEZ, Y. & LORENZ, C. & MAGNE, J. & MARGEREL, J.-P. & POIGNANT, A. & PUJOL, C. & ROGER, J. & ROMAN, J. & BLONDEAU, A. & MULLER, C. (1973) A propos de la limite oligo-miocène: résultats préliminaires d'une recherche collective sur les gisements d'Escornébéou (Saint-Géours-de-Maremne, Landes, Aquitaine méridionale). Présence de Globigerinoides dans les faunes de l'Oligocène supérieur. Comptes rendus sommaires des séances de la Société géologique de France: 75–76
Extant Chondrichthyes:
KAMOHARA, T. (1943) Some unrecorded and two new fishes from Prov. Tosa, Japan. Bulletin of the Biogeographical Society of Japan, 13 (17): 125–137
DE BUEN, F. (1950) Contribuciones a la Ictiología. II. El tiburón vitamínico de la costa uruguaya Galeorhinus vitaminicus nov. sp., y algunas consideraciones generales sobre su biología. Publicaciones Cientificas, Servicio Oceanografico y de Pesca, Ministerio de Industrias y Trabajo, Montevideo No. 4: 153–162.
WEIBEZAHN, F.H. (1953) Una nueva especie de Scyliorhinus de Venezuela (Chondrichthyes - Elasmobranchii). Novedades cientificas. Serie zoológica. Museo de Historia Natural La Salle, 9: 1–7.
SMITH, J.L.B. (1958) The mystery killer, the new shark Carcharhinus vanrooyeni. Veld & Vlei, 3 (9): 12–14, 28.
GUBANOV, E.P. & SCHLEIB, N.A. (1980) Sharks of the Arabian Gulf. Kuwait Ministry of Public Works, Agracultural Department, Fisheries Division. Sharks of the Arabian Gulf.: 1–69
DOLGANOV, V.N. (1983) Rukovodstvo po opredeleniyu khryashchevykh ryb dal'nevostochnykh morei SSSR i sopredel'nykh vod. [Manual for identification of cartilaginous fishes of Far East seas of USSR and adjacent waters.] TINRO, Vladivostok. Rukovodstvo po opredeleniyu khryashchevykh ryb dal'nevostochnykh morei SSSR i sopredel'nykh vod.: 92 pp.
Please support www.shark-references.com and send missing papers (not listed papers or papers without the info-symbol) to juergen.pollerspoeck@shark-references.com or nicolas.straube@shark-references.com
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Upcoming Meetings:
The 24th Annual Scientific Meeting of the European Elasmobranch Association is planned to be held by the Dutch member group Nederlandse Elasmobranchen Vereniging (NEV) in Leiden, the Netherlands between 3rd and 5th November, 2021.
NEV, in consultation with the EEA Board, has decided to tentatively organise this year’s EEA Meeting as an in-person meeting. Luckily, NEV was able of having secured the same prime venue at the fascinating Naturalis Biodiversity Center! Leiden is a beautiful old university town just 20 mins from Schiphol airport and international train station.
Prior to the main meeting we will organise an online session on November 2nd to allow those who cannot attend in person to contribute.
We understand that there is still a lot of uncertainty as far as travel etc. is concerned. In mid-July we will make the decision whether or not to host a live event.
If an in-person meeting is not possible the entire EEA2021 will be online.
In the coming weeks the website for early registration will be updated, as well as opening the abstract submission for either an online or live presentation.
Details can be found on the NEV website: https://www.elasmobranch.nl/eea2021/
 
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Welcome to ESEB 2021 Congress.
Given the current situation, the organizers
decided to postpone the congress by a year.
Welcome to the ESEB 2021 congress, to be held at the Prague Congress Centre, the Czech Republic, on 22-27 August 2021.
The congresses of the European Society for Evolutionary Biology (ESEB) are organized biennially since 1987 and are now among the largest conferences in evolutionary biology with about 1400 – 1700 participants.
The congress will commence on Sunday, August 22, 2021, with the welcome reception, and will continue until Friday, August 27, concluding with the conference dinner at Občanská Plovárna Restaurant on this evening.
The Prague Congress Centre is easily accessible from the city centre and has a beautiful panoramic view of Prague.
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92nd Annual Meeting of the Paläontologische Gesellschaft!
This year's Annual Meeting will be held as online conference from September 27 to 30, 2021.
We are pleased to host the 92nd annual conference of the Paläontologische Gesellschaft (PalGes). The meeting, like the previous ones, is designed as an international meeting to present cutting-edge research from palaeobiology, palaeontology, geobiology and related subjects. The Paläontologische Gesellschaft is one of the oldest and largest palaeontological societies in the world and we "Viennese" are now hosting the annual meeting for the fifth time after 1923, 1954, 1963 and 2011.
The venue will be held as online conference only due to uncertainties over travel and meeting size restrictions related to COVID-19 development. Participation in the conference is free of charge. Unfortunately, the online format means that there will not be any poster session or conference dinner this year.
We will keep you up to date with new and exciting details of our virtual meeting. If you have questions, please do not hesitate to contact us via e-mail.
https://palges2021.univie.ac.at/en/
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IX National Symposium of Sharks and RaysII Latin American Congress Sharks, Rays and ChimerasThe Sociedad Mexicana de Peces Car tilaginosos, A. C. (SOMEPEC)September 6 – 10, 2021Puebla, MéxicoThe Sociedad Mexicana de Pec-es Car tilaginosos, A. C. (SOME-PEC) is a non-profit organization that seeks to promote the scientific study of sharks and rays, as well as their rational use. Faithful to its objective of creating spaces for the exchange of experiences and advances in the dif ferent lines of research on sharks and rays, which are developed in Mexico and the rest of the world, it organizes the IX National Symposium of Sharks and Rays, and II Latin American Congress of Sharks, Rays and Chimaeras----------------------------------------------------------------------------------------------------------------------  IUCN World Conser vation CongressSeptember 3 – 11, 2021Marseille, Franceiucncongress2020.orgThe IUCN World Conser vation Congress is where the world comes together to set priorities and drive conservation and sustainable development ac-tion. IUCN’s 1300+ government, civil society and indigenous peoples’ Member organisations vote on major issues, action which guides humanity’s relationship with our planet for the decades ahead. IUCN’s unique and inclusive membership gives the Congress a powerful mandate as it is not solely government or non-government, but both together.----------------------------------------------------------------------------------------------------------------------  6th Southern African Shark & Ray Symposium (SASRS)November 17 – 19, 2021Gansbaai, South Africasharkandraysymposium.comThe Southern African Shark and Ray Symposium is a bienni-al meeting of the academic community of Southern Africa who are currently conducting research on these taxa.The SASRS will be composed of a combination of oral and poster presentations, work-shops, and public events – with plenty of added fun and adventure planned for attendees. Keynote presentations will be scheduled throughout the Symposium. ----------------------------------------------------------------------------------------------------------------------  Oceania Chondrichthyan Societ y (OCS)8th World Fisheries Congress (WFC)Session 58: “Global Status, Recent Developments and Future of Shark and RayFisheries”September 20 – 24, 2021Adelaide, AustraliaThe Oceania Chondrichthyan Society was founded in 2005 and is a joint venture between Australia, New Zealand, Papua New Guinea and the Pacific Islands to promote and facilitate education, conservation and scientific study of chondrichthyan fish.The 8th World Fisheries Congress will be the largest gathering of research, industry and management sectors to discuss the latest advances in fisheries world-wide. The World Fisheries Congress is the key international fisheries conference. Aiming to foster cooperation and engagement in commercial, recreational and indigenous fisheries. Providing insightful presentations and inspiring forums on key developments needed to ensure the future sustainable development of the world’s oceans, lakes, estuaries and rivers.The goal of the “Global Status, Recent Developments and Future of Shark and Ray Fisheries” session is to assemble shark fisheries scientists from around the globe to discus s novel research and provide insight on how they study their local shark fisheries. This session will provide a platform for sharkand ray scientists to discus-recent research techniques, findings, and their implications for the future of shark and ray fisheries.
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TAXONOMIC NEWS/ NEW SPECIES
Extant Chondrichthyes:
Cordova, J.A. & Ebert, D.A. (2021): Apristurus manocheriani (Carcharhiniformes: Pentanchidae), a new species of catshark from the Southwest Indian Ocean. Journal of the Ocean Science Foundation, 38, 13–26
New species: Apristurus manocheriani
Abstract: A new species of catshark, Apristurus manocheriani n. sp., is described from 8 specimens collected from seamounts in the southwest Indian Ocean (SWIO). The new species is placed in the Apristurus spongiceps subgroup and is only the second known species in this subgroup occurring in the western Indian Ocean. Geographically, Apristurus manocheriani is known only from the SWIO, while its two closest congeners are from distant locations: Apristurus albisoma Nakaya & Séret, 1999 occurs in the southwest Pacific Ocean and Apristurus aphyodes Nakaya & Stehmann, 1998 in the northeast Atlantic.
Extinct Chondrichthyes:
Ivanov, A.O. (2021): A New Phoebodontid Shark from the Devonian of the Urals and the Distribution of Phoebodus Species. Paleontological Journal, 55(3), 301-310
New species: Phoebodus curvatus
Abstract: A new species, Phoebodus curvatus from the Middle and Upper Devonian of the Middle and South Urals is described. The teeth of the new species differ from the teeth of other Phoebodus species in the very long lateral cusps curved lingually, and narrow labio-basal projection protruding beyond the labial edge. The distribution of all known Phoebodus species is analyzed. The ranges of five previously established phoebodontid zones are revised and emended. Two species radiations are recorded in the Late Frasnian and the Middle-Late Famennian.
Ivanov, A.O. & Bakaev, A.S. & Nestell, M.K. & Nestell, G.P. (2021): Fish Microremains from the Cutoff Formation (Roadian, Middle Permian) of the Guadalupe Mountains, West Texas, USA. Micropaleontology, 67(4), 365-402
New species: Reifella lata
Abstract: Anew assemblage of diverse fish microremains from the Roadian Williams Ranch Member of the Cutoff Formation in the Guadalupe Mountains, West Texas is described. The chondrichthyan remains comprise symmoriiforms Stethacanthulus decorus, Kungurodus sp. and indeterminate taxa; ctenacanthiform Glikmanius myachkovensis; euselachian Sphenacanthus sp. and Hybodontiformes indet.; anachronistids Cooleyella amazonensis, Cooleyella sp. and Reifella lata Ivanov, n. gen., n. sp.; jalodontids Adamantina foliacea, Isacrodus marthae and Isacrodus sp.; indeterminate euchondrocephalian and chondrichthyans. Actinopterygian remains include the elonichthyid Alilepis texasensis Bakaev, n. sp., indeterminate platysomids and acrolepidids, indeterminate taxa and other osteichthyans. The assemblage includes the widely geographically distributed taxa Cooleyella amazonensis, Stethacanthulus decorus and Adamantina foliacea. The occurrence of last two species in the Cutoff Formation represents their youngest record in the world. Possible migration paths are proposed for Alilepis.
Kumar, K. & Bajpai, S. & Pandey, P. & Ghosh, T. & Bhattacharya, D. (2021): Hybodont sharks from the Jurassic of Jaisalmer, western India. Historical Biology, in press
New species: Strophodus jaisalmerensis
Abstract: Jurassic (Bathonian-Oxfordian) hybodont sharks are described for the first time from the Jaisalmer Basin of Rajasthan, western India. Isolated, possibly associated, crushing-type hybodont teeth recovered from the Jaisalmer Formation (Fort, Badabag and Jajiya members) are assigned to two species of Strophodus: Strophodus jaisalmerensis sp. nov. and Strophodus sp. Strophodus, long considered to be a junior synonym of the iconic ninteenth century genus Asteracanthus, has recently been shown to be distinct from the latter. This is the first record of Strophodus from the Indian subcontinent and it significantly expands the distribution of this genus in the Jurassic of the eastern Tethys. The hybodont-bearing horizons yielded an assemblage of vertebrates (e.g. pycnodont fishes, crocodilians), invertebrates and fossil wood, suggesting a near-shore marine environment for the new species.
Parasites:
Vaughan, D.B. & Christison, K.W. & Hansen, H. (2021): New monogeneans from the bathydemersal southern African endemic catshark, Holohalaelurus regani (Gilchrist, 1922). Systematic Parasitology, in press
New species: Leptomicrobothrium holohalaelure, Scyliorhinocotyle narvaezae
Abstract: The catshark genus Holohalaelurus Fowler is currently represented by five species distributed off the southern and eastern parts of the African coast. Very few parasitological records exist for any of these five species, representing a significant knowledge gap. We report the first monogenean species from the bathydemersal species Holohalaelurus regani (Gilchrist): a new species of Microbothriidae Price, 1936, Leptomicrobothrium holohalaelure n. sp. from the dorsal skin surface, and a new species of Hexabothriidae Price, 1942 representing a new genus, Scyliorhinocotyle narvaezae n. gen., n. sp., from the gill lamellae. Both monogenean records represent the first for any member of the catshark genus Holohalaelurus. Previously we focused on the identification of monogenean taxa of emerging veterinary importance for public aquaria. We now begin a focused effort to document a generally unexplored monogenean biodiversity from diverse marine habitats off South Africa.
Chero, J. & Cruces, C. & Sáez, G. & Oliveira, A. & Santos, C. & Luque, J. (2021): A new species of Loimopapillosum Hargis, 1955 (Monogenea: Monocotylidae) parasitizing Hypanus dipterurus (Myliobatiformes: Dasyatidae) off the Pacific coast of South America, and its phylogenetic relationships. Journal of Helminthology, 95, Article e37
New species: Loimopapillosum pascuali
Abstract: A new species of Loimopapillosum Hargis, 1955 is described based on specimens collected from the gills of the diamond stingray, Hypanus dipterurus (Jordan & Gilbert, 1880) (Myliobatiformes: Dasyatidae) captured off Puerto Pizarro, Tumbes Region, northern Peru. Loimopapillosum pascuali n. sp. is distinguished mainly from the type and only species, Loimopapillosum dasyatis Hargis, 1955, by its funnel-shaped male copulatory organ, with an asymmetrical base; the superficial root of the anchor with distal knobs; the deep root of the anchor with a constriction at its base; a single testis; and the number of head organs. Available sequences for members of Monocotylidae in the GenBank as well as partial sequences for the gene 28S and 18S ribosomal DNA from L. pascuali n. sp. were included in phylogenetic analyses, suggesting that Loimoinae (represented in this study by L. pascuali n. sp. and Loimosina sp.) is nested within the Monocotylidae Taschenberg, 1879. Therefore, we confirm the rejection of Loimoidae Price, 1936 and its reincorporation as a subfamily of Monocotylidae, as previously suggested. Loimopapillosum pascuali n. sp. represents the first species of this genus in South America.
Menoret, A. & Ivanov, V.A. (2021): New species of Guidus Ivanov, 2006 (Cestoda: Phyllobothriidea) from Bathyraja magellanica (Philippi) from the Patagonian Continental Shelf of Argentina. Folia Parasitologica, 68, Article 11
New species: Guidus francoi, Guidus magellanicus
Abstract: Specimens representing two new species of Guidus Ivanov, 2006 were collected from the Magellan skate (Bathyraja magellanica [Philippi]) in the Patagonian Continental Shelf of Argentina, Southwestern Atlantic Ocean. Guidus francoi sp. n. and Guidus magellanicus sp. n. differ from their congeners by a particular combination of features, including type of bothridia, worm length, number of testes, and distribution of vitelline follicles. Guidus francoi sp. n. is distinguished from G. magellanicus sp. n. by having fewer proglottids, fewer testes and a higher ratio between the cirrus sac length and the proglottid width. The microthrix pattern of species of Guidus from the Southwestern Atlantic is described, based on specimens of G. francoi sp. n., Guidus magellanicus sp. n., and newly collected specimens of Guidus argentinense Ivanov, 2006. These three species share the presence of wide aristate gladiate spinitriches on the proximal bothridial surface, narrow gladiate spinitriches on the bothridial rim, and filitriches on the distal bothridial surface. The diagnosis of Guidus is revised to include several features exhibited by the new species (i.e., presence of bothridial indentations and bothridial stalks, distribution of vitelline follicles, and eggs grouped in cocoons). The discovery of G. francoi sp. n. and G. magellanicus sp. n. from B. magellanica increases the number of species of Guidus collected from batoids in the Southwestern Atlantic from one to three. The specificity exhibited by the species herein described reinforces the tight association between rays in the genera Guidus and Bathyraja.
Moravec, F. & Justine, J.L. (2021): Echinocephalus inserratus sp. n. (Nematoda: Gnathostomatidae) from the stingray Pastinachus ater (Dasyatidae) and new records of congeneric and some other nematode larvae from teleost fishes off New Caledonia. Folia Parasitologica, 68, Article 14
New species: Echinocephalus inserratus
Abstract: ased on light and electron microscopical studies, a new nematode parasite, Echinocephalus inserratus sp. n. (Spirurida: Gnathostomatidae), is described from the spiral valve of the broad cowtail stingray Pastinachus ater (Macleay) (Dasyatidae, Myliobatiformes) from off New Caledonia. The new species is morphologically and biometrically most similar to Echinocephalus overstreeti Deardorff et Ko, 1983, differing from it mainly in the absence of serrations on the posterior parts of pseudolabia and on interlabia, and in having a longer gubernaculum (150-299 µm long). Morphologically unidentifiable, mostly encapsulated larvae of Echinocephalus spp. were recorded from the following six species of teleost fishes collected in New Caledonian waters, serving as paratenic hosts: Perciformes: Acanthopagrus berda (Forsskål) (Sparidae) and Nemipterus furcosus (Valenciennes) (Nemipteridae); Tetraodontiformes: Abalistes stellatus (Anonymous), Pseudobalistes fuscus (Bloch et Schneider) (both Balistidae), Lagocephalus sceleratus (Gmelin) (Tetraodontidae) and Aluterus monoceros (Linnaeus) (Monacanthidae). Co-parasitising larvae of Ascarophis sp. and Hysterothylacium sp. were also collected from P. fuscus. All these findings represent new host and geographical records. A key to valid species of Echinocephalus Molin, 1858 is provided.
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Latest Research Articles
Extant Chondrichthyes:
Alvarenga, M. & Sole-Cava, A.M. & Henning, F. (2021). What's in a name? Phylogenetic species identification reveals extensive trade of endangered guitarfishes and sharks. Biological Conservation, 257, Article 109119 https://dx.doi.org/10.1016/j.biocon.2021.109119
Argeswara, J. & Hendrawan, I.G. & Dharma, I. & Germanov, E. (2021). What's in the soup? Visual characterization and polymer analysis of microplastics from an Indonesian manta ray feeding ground. Marine Pollution Bulletin, 168, Article 112427 https://dx.doi.org/10.1016/j.marpolbul.2021.112427
Bartes, S. & Braccini, M. (2021). Potential expansion in the spatial distribution of subtropical and temperate west Australian sharks. Journal of Fish Biology, in press https://dx.doi.org/10.1111/jfb.14822
Beal, A.P. & Hackerott, S. & Franks, B. & Gruber, S.H. & Feldheim, K. & Eirin-Lopez, J.M. (2021). Epigenetic responses in juvenile Lemon sharks (Negaprion brevirostris) during a coastal dredging episode in Bimini, Bahamas. Ecological Indicators, 127, Article 107793 https://dx.doi.org/10.1016/j.ecolind.2021.107793
Becerril-Garcia, E.E. & Pancaldi, F. & Cruz-Villacorta, A.A. & Rivera-Camacho, A.R. & Aguilar-Cruz, C.A. & Whitehead, D.A. & Gonzalez-Armas, R. & Arellano-Martinez, M. & Galvan-Magana, F. (2021). General descriptions of the dermis structure of a juvenile whale shark Rhincodon typus from the Gulf of California. Journal of Fish Biology, in press https://dx.doi.org/10.1111/jfb.14827
Bellodi, A. & Mulas, A. & Carbonara, P. & Cau, A. & Cuccu, D. & Marongiu, M.F. & Mura, V. & Pesci, P. & Zupa, W. & Porcu, C. & Follesa, M.C. (2021). New insights into life-history traits of Mediterranean Electric rays (Torpediniformes: Torpedinidae) as a contribution to their conservation. Zoology, 146, Article 125922 https://dx.doi.org/10.1016/j.zool.2021.125922
Benjamins, S. & Cole, G. & Naylor, A. & Thorburn, J.A. & Dodd, J. (2021). First confirmed complete incubation of a flapper skate (Dipturus intermedius) egg in captivity. Journal of Fish Biology, in press https://dx.doi.org/10.1111/jfb.14816
Bezerra, M.F. & Seminoff, J.A. & Lemons, G.E. & Slotton, D.G. & Watanabe, K. & Lai, C.T. (2021). Trophic ecology of sympatric batoid species (Chondrichthyes: Batoidea) assessed by multiple biogeochemical tracers (delta C-13, delta N-15 and total Hg). Environmental Research, 199, Article 111398 https://dx.doi.org/10.1016/j.envres.2021.111398
Braccini, M. & Lai, E. & Ryan, K. & Taylor, S. (2021). Recreational Harvest of Sharks and Rays in Western Australia Is Only a Minor Component of the Total Harvest. Sustainability, 13(11), Article 6215 https://dx.doi.org/10.3390/su13116215
Budd, A.M. & Cooper, M.K. & Le Port, A. & Schils, T. & Mills, M.S. & Deinhart, M.E. & Huerlimann, R. & Strugnell, J.M. (2021). First detection of critically endangered scalloped hammerhead sharks (Sphyrna lewini) in Guam, Micronesia, in five decades using environmental DNA. Ecological Indicators, 127, Article 107649 https://dx.doi.org/10.1016/j.ecolind.2021.107649
Cabbar, K. & Yigin, C.C. (2021). Biology of the thornback ray (Raja clavata Linnaeus, 1758) in the North Aegean Sea. Oceanological and Hydrobiological Studies, 50(2), 115–127 https://dx.doi.org/10.2478/oandhs-2021-0011
Carlisle, A.B. & Allan, E.A. & Kim, S.L. & Meyer, L. & Port, J. & Scherrer, S. & O'Sullivan, J. (2021). Integrating multiple chemical tracers to elucidate the diet and habitat of Cookiecutter Sharks. Scientific Reports, 11, Article 11809 https://dx.doi.org/10.1038/s41598-021-89903-z
Carugati, L. & Melis, R. & Cariani, A. & Cau, A. & Crobe, V. & Ferrari, A. & Follesa, M.C. & Geraci, M.L. & Iglesias, S.P. & Pesci, P. & Tinti, F. & Cannas, R. (2021). Combined COI barcode-based methods to avoid mislabelling of threatened species of deep-sea skates. Animal Conservation, in press https://dx.doi.org/10.1111/acv.12716
Clarke, L.J. (2021). Morphological abnormality in thornback ray Raja clavata in the Irish Sea. Environmental Biology of Fishes, 104(6), 719–724 https://dx.doi.org/10.1007/s10641-021-01105-8
Cordova, J.A. & Ebert, D.A. (2021). Apristurus manocheriani (Carcharhiniformes: Pentanchidae), a new species of catshark from the Southwest Indian Ocean. Journal of the Ocean Science Foundation, 38, 13–26 j https://dx.doi.org/10.5281/zenodo.5081131
da Silva, J. & Vaz, D.B.F. (2021). A redescription of the appendicular skeleton of Squalus acanthias (Elasmobranchii: Squaliformes: Squalidae). Acta Zoologica, in press https://dx.doi.org/10.1111/azo.12394
de Melo, A.C.M. & de Andrade, C.B. & Poscai, A. & Do Rêgo, M.G. & de Sá, F.B. & Neto, J.E. & de Araújo, M.L.G. (2021). Ecomorphology of the rectal gland of three batoids (Elasmobranchii: Myliobatiformes) Zoologischer Anzeiger, 293, 225–232 https://dx.doi.org/10.1016/j.jcz.2021.06.010
Fahmi, Tibbetts, I.R. & Bennett, M.B. & Ali, A. & Krajangdara, T. & Dudgeon, C.L. (2021). Population structure of the brown-banded bamboo shark, Chiloscyllium punctatum and its relation to fisheries management in the Indo-Malay region. Fisheries Research, 240, Article 105972 https://dx.doi.org/10.1016/j.fishres.2021.105972
Fisher, R. (2021). Possible causes of a substantial decline in sightings in South Africa of an ecologically important apex predator, the white shark. South African Journal of Science, 117(1/2), Article 8101 https://dx.doi.org/10.17159/sajs.2021/8101
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Parasites:
Chero, J. & Cruces, C. & Sáez, G. & Oliveira, A. & Santos, C. & Luque, J. (2021). A new species of Loimopapillosum Hargis, 1955 (Monogenea: Monocotylidae) parasitizing Hypanus dipterurus (Myliobatiformes: Dasyatidae) off the Pacific coast of South America, and its phylogenetic relationships. Journal of Helminthology, 95, Article e37 https://dx.doi.org/10.1017/S0022149X21000262
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Snene, H.E. & Rangel, L.F. & Quilichini, Y. & Santos, M.J. & Bahri, S. (2021). First description of Chloromyxum squali Gleeson and Adlard, 2012 (Myxozoa) in the Mediterranean Sea in a new host Squalus blainville (Chondrichthyes: Squalidae): morphological, ultrastructural and phylogenetic data. Parasitology Research, 120(7), 2479-2491 https://dx.doi.org/10.1007/s00436-021-07202-y
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New 3D images of shark intestines show they function like Nikola Tesla's valve
- Date: July 22, 2021
- Source: University of Washington
- Summary: For more than a century, researchers have relied on flat sketches of sharks' digestive systems to discern how they function -- and how what they eat and excrete impacts other species in the ocean. Now, researchers have produced a series of high-resolution, 3D scans of intestines from nearly three dozen shark species that will advance the understanding of how sharks eat and digest their food.
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New 3D images of shark intestines show they function like Nikola Tesla’s valve
Michelle Ma
UW News
Contrary to what popular media portrays, we actually don’t know much about what sharks eat. Even less is known about how they digest their food, and the role they play in the larger ocean ecosystem.
For more than a century, researchers have relied on flat sketches of sharks’ digestive systems to discern how they function — and how what they eat and excrete impacts other species in the ocean. Now, researchers have produced a series of high-resolution, 3D scans of intestines from nearly three dozen shark species that will advance the understanding of how sharks eat and digest their food.
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Expeditie naar de Sababank om de tijgerhaai beter te beschermen (in Dutch)
Dutch Caribbean Nature Alliance (DCNA), Wereld Natuur Fonds
28-JUL-2021 - Op 1 augustus 2021 zal een team onderzoekers een week bij de Sababank verblijven om de levenscyclus van de tijgerhaai te onderzoeken. De onderzoekers zullen de migratieroutes bestuderen en onderzoeken waar en wanneer de tijgerhaai zich voortplant. Zo kan de soort beter beschermd worden. Zowel binnen het Yarari zeezoogdier- en haaienreservaat in het Caribisch Nederlands gebied, als daarbuiten.
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New IUCN Shark News Newsletter is out!
Download: https://www.iucnssg.org/shark-news.html |
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