NEWSLETTER 03/2021 15.03.2021
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
NEWS/ OWN RESEARCH
new publication by team shark-references:
- OPEN ACCESS -
A three‐ton shipment of dry shark fins was examined by German customs in 2017 leading to the confiscation of 405 kg of potential CITES species. We analyzed a subsample of this material (115 specimens) using DNA sequence‐based identification and compared results to morphological screening of CITES species. We found a mixture of CITES regulated (4 of 11 species) and unregulated shark species. Our results demonstrate the difficulties of identifying CITES species morphologically in large fin shipments of mixed species composition. Correct identification of CITES species based on morphology alone may be hindered by missing characters or those altered by drying. We therefore suggest random molecular screening as a uniform approach for German customs authorities to check species composition and identify CITES regulated species in transit shipments.
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, in press
free download via research
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Partner in Google-Maps:
Would you like to become a shark-reference partner? Please contact us per E-mail!
Many thanks to the following people for providing images:
Frederik Mollen (Elasmobranch Research Belgium) for the images Brachaelurus waddi (BLOCH & SCHNEIDER, 1801)
Otto Bismarck Fazzano Gadig, Laboratório de Pesquisa de Elasmobrânquios, UNESP, Brazil, for a image of Parmaturus angelae SOARES, DE CARVALHO, SCHWINGEL & GADIG, 2019
Bryan Huerta for a images of Carcharhinus acronotus (POEY, 1860) and Mustelus sinusmexicanus HEEMSTRA, 1997
Alberto Collareta for a image of the holotype of Nebriimimus wardi
Evgeny V. Popov for a image of Ptyktoptychion eyrensis (LONG, 1985)
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:
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
BOYD, B.M. (2016) Fossil sharks and rays of Gainesville creeks; Alachua County, Florida: Hogtown group; (middle Miocene to lower Pliocene). Florida Paleontological Society, Special Publication
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.
CADENAT, J. (1951) Initiations Africaines. III. Poissons de Mer du Sénégal. Institute Francais d'Afrique Noire. Initiations Africaines. III. Poissons de Mer du Sénégal.: 1–345
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.
SICCARDI, E. (1961) Cetorhinus en el Atlantico sur (Elasmobranchii: Cetorhinidae). Actas y trabajos del Primer Congreso Sudamericano de Zoologia, 4 (5): 251–263
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 email@example.com or firstname.lastname@example.org
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.
June 21 - 25, 2021
After discussions with the EEA Board, we have decided to postpone this year’s European Elasmobranch Association Annual Meeting entirely until 2021. The good news is that it will be at the same venue, around the same time, just one year on! We hope to see you all there.
The 24th Annual Scientific Meeting of the European Elasmobranch Association will be held by the Dutch member group Nederlandse Elasmobranchen Vereniging (NEV) in Leiden, the Netherlands between 28th and 30th October, 2020. The venue is the fascinating Naturalis Biodiversity Center.
Looking forward to seeing you in Leiden!
Puebla, México, 19 - 23/04/2021
The Sociedad Mexicana de Peces Cartilaginosos, A. C. (SOMEPEC), is a non-profit organization that organizes the IX National Symposium of Sharks and Rays, and II Latin American Congress Sharks, Rays and Chimeras.
La Sociedad Mexicana de Peces Cartilaginosos, A. C. (SOMEPEC), es una organización sin fines de lucro, que busca promover el estudio científico de los tiburones y rayas, así como uso racional. Fiel a su objetivo de crear espacios para el intercambio de experiencias y avances de las diferentes líneas de investigación sobre tiburones y rayas, que se desarrollan en México y el resto del mundo, organiza el IX Simposium Nacional de Tiburones y Rayas, y II Congreso Latinoamericano de Tiburones, Rayas y Quimeras.
|TAXONOMIC NEWS/ NEW SPECIES
no news this month :-)
COLLARETA, A. & MOLLEN, F.H. & MERELLA, M. & CASATI, S. & DI CENCIO, A. (2021): Remarkable multicuspid teeth in a new elusive skate (Chondrichthyes, Rajiformes) from the Mediterranean Pliocene. Paläontologische Zeitschrift, in press
New species: Nebriimimus wardi
Abstract: Here we report on four highly peculiar skate teeth from Arcille and Certaldo, two Pliocene localities of Tuscany (central Italy). While being attributable to Rajiformes and somewhat reminiscent of Dipturus and Rostroraja, these specimens display an unusual multicuspid tooth design that does not match any extinct or extant skate taxon known to date. The studied teeth are thus referred to a new genus and species of Rajiformes, Nebriimimus wardi gen. et sp. nov., which is here tentatively assigned to the family Rajidae. Based on pronounced morphological similarities between the rather large-sized teeth of the latter and those of extant nurse sharks, we hypothesise that N. wardi might have been capable of actively foraging upon relatively large food items compared to other rays. This extinct skate species was likely not a common component of the Pliocene Tuscan marine vertebrate assemblages. The palaeoenvironmental scenarios that N. wardi inhabited were marginal-marine and open shelf settings characterised by tropical climate conditions. As N. wardi is currently known only from lower to mid-Pliocene deposits of the Mediterranean Basin, it is tempting to speculate that its speciation dates back to an earliest Pliocene phase of diversification that also contributed to the emergence of the Mediterranean endemic stock of extant skate species.
JENSEN, K. & GUYER, R. (2021): First Report of Lecanicephalidean Tapeworms (Eucestoda) from Freshwater, Including Description of Three New Species of Tetragonocephalum Shipley and Hornell, 1905. Journal of Parasitology, 107 (1): 1-15
New species: Tetragonocephalum georgei, Tetragonocephalum levicorpum, Tetragonocephalum opimum
Abstract: The lecanicephalidean cestodes parasitizing the spiral intestine of the endangered giant freshwater whipray, Urogymnus polylepis (Bleeker), are investigated for the first time. Eight host specimens were collected between 2002 and 2008 at 2 collecting sites off the eastern coast of Borneo: 6 from the Kinabatangan River (Malaysia) and 2 from a fish market in Tarakan (Indonesia). Two of these individuals were found to be infected with a total of 3 new species of Tetragonocephalum Shipley and Hornell, 1905. Tetragonocephalum georgei n. sp. and Tetragonocephalum opimum n. sp. were recovered from a host specimen from the Kinabatangan River, and Tetragonocephalum levicorpum n. sp. was found parasitizing a host specimen purchased at a fish market in Tarakan. Specimens of each of the new species were prepared for light microscopy; specimens of 2 of the new species were prepared for scanning electron microscopy, and histological sections were prepared for 1 of the new species. The 3 new species are distinct from the 9 valid species of Tetragonocephalum and the 1 species inquirendum based on, for example, total length, number of proglottids and testes, and size of the scolex and acetabula. Tetragonocephalum georgei n. sp. and T. levicorpum n. sp. are unusual among their congeners in that they are euapolytic (i.e., gravid proglottids were not observed) rather than apolytic. They differ from one another in scolex and acetabula size. Tetragonocephalum opimum n. sp. is unusual among its congeners in its possession of vitelline follicles arranged in 2, rather than 3, regions in the proglottid. These new species increase the total number of valid species of Tetragonocephalum to 12 and the total number of known cestodes from U. polylepis to 13 species across 6 genera in 4 orders. This is the first account of lecanicephalideans reported from freshwater. The taxonomic status of each of the 32 nominal taxa historically associated with Tetragonocephalum is re-assessed. Type host identities of all valid species are revised and discussed in light of recent taxonomic efforts in the Dasyatidae Jordan and Gilbert.
CAIRA, J.N. & JENSEN, K. (2021): Two new species of Caulobothrium (Cestoda: "Tetraphyllidea") from the duckbill eagle ray, Aetomylaeus bovinus (Myliobatiformes: Myliobatidae), off Senegal with new insights on morphological features of the genus. Zootaxa, 4903 (1): 127-139
New species: Caulobothrium multispelaeum, Caulobothrium katzi
Abstract: Two new species of the cestode genus Caulobothrium, collected from the duckbill eagle ray, Aetomylaeus bovinus, off Senegal, are described. Although postulated as sister taxa in an earlier molecular phylogenetic analysis, Caulobothrium multispelaeum n. sp. and Caulobothrium katzi n. sp., respectively, are among the smallest and largest members of the genus. The smaller species is unique among its congeners in possessing unusual medial longitudinal grooves along the dorsal and ventral surfaces of its strobila that develop into a tandem series of elliptical apertures on the posterior proglottids. The inner surfaces of these apertures stained positively with McManus’ periodic acid Schiff in a manner similar to that seen in members of the distantly related lecanicephalidean genus Elicilacunosus. The larger species differs from its congeners in size, number of proglottids, and arrangement of bothridial loculi. Both new species were found to possess a small apical sucker on the anterior margin of each of their bothridia. Scanning electron microscopy (SEM) and frontal sections of a bothridium of Caulobothrium tetrascaphium suggests that this species also bears an apical sucker. Examination of the hologenophore of the species provisionally referred to as Caulobothrium n. sp. 5 in the earlier molecular analysis indicates it is conspecific with the recently described Caulobothrium pedunculatum, which was also determined to possess bothridial apical suckers. This leads us to suspect that this feature may be found to occur in all members of the genus. SEM of specimens of Caulobothrium for the first time indicates their bothridial surfaces are covered with filitriches of various sizes but lack spinitriches; spinitriches were seen only on the cephalic peduncle of C. katzi n. sp. The geographic distribution and host associations of Caulobothrium are expanded to include data now available for all species. The diagnosis of the genus is revised to include all of this information.
Latest Research Articles
AALBERS, S.A. & WANG, M. & VILLAFANA, C. & SEPULVEDA, C.A. (2021) Bigeye thresher shark Alopias superciliosus movements and post-release survivorship following capture on linked buoy gear. Fisheries Research, 236: 105857 https://dx.doi.org/10.1016/j.fishres.2020.105857
ALLEN, H.L. & STEWART, B.D. & MCCLEAN, C.J. & HANCOCK, J. & REES, R. (2021) Anthropogenic injury and site fidelity in Maldivian whale sharks (Rhincodon typus). Aquatic Conservation-Marine and Freshwater Ecosystems, in press https://dx.doi.org/10.1002/aqc.3524
ALONSO-FERNANDEZ, A. & OTERO, J. & BANON, R. (2021) Indicators of body size variability in a highly developed small-scale fishery: Ecological and management implications. Ecological Indicators, 121: 107141 https://dx.doi.org/10.1016/j.ecolind.2020.107141
ANDRADE, F.R.S. & AFONSO, A.S. & HAZIN, F.H.V. & MENDONCA, F.F. & TORRES, R.A. (2021) Population genetics reveals global and regional history of the apex predator Galeocerdo cuvier (Carcharhiniformes) with comments on mitigating shark attacks in north-eastern brazil. Marine Ecology, in press: e12640 https://dx.doi.org/10.1111/maec.12640
ARIAS-GODINEZ, G. & JIMENEZ, C. & GAMBOA, C. & CORTES, J. & ESPINOZA, M. & BEITA-JIMENEZ, A. & ALVARADO, J.J. (2021) The effect of coral reef degradation on the trophic structure of reef fishes from Bahia Culebra, North Pacific coast of Costa Rica. Journal of Coastal Conservation, 25 (1): 8 https://dx.doi.org/10.1007/s11852-021-00802-x
BALANOV, A.A. & PANCHENKO, V.V. & SAVIN, A.B. (2020) The First Record of a Spawning Ground of the Mud Skate Bathyraja taranetzi (Dolganov, 1983) and the Okhotsk Skate B. violacea (Suvorov, 1935) in Pacific Waters off the Northern Kuril Islands. Russian Journal of Marine Biology, 46 (6): 501-505 https://dx.doi.org/10.1134/s1063074020060024
BARCELOS, L.M.D. & AZEVEDO, J.M.N. & BARREIROS, J.P. (2021) Updated checklist of Azores Chondrichthyes (Vertebrata: Gnathostomata). Biodiversity Data Journal, 9: e62813 https://dx.doi.org/10.3897/BDJ.9.e62813
BASUSTA, N. & BASUSTA, A. & OZYURT, C.E. (2021) Evidence of a second nursery area of the sandbar shark, Carcharhinus plumbeus (Nardo, 1827) in the Eastern Mediterranean Sea. Mediterranean Marine Science, 22 (1): 20-26 https://dx.doi.org/10.12681/mms.24490
BERGMANN, M.P.M.V. & POSTAIRE, B.D. & GASTRICH, K. & HEITHAUS, M.R. & HOOPES, L.A. & LYONS, K. & PAPASTAMATIOU, Y.P. & SCHNEIDER, E.V.C. & STRICKLAND, B.A. & TALWAR, B.S. & CHAPMAN, D.D. & BAKKER, J. (2021) Elucidating shark diets with DNA metabarcoding from cloacal swabs. Molecular Ecology Resources, in press https://dx.doi.org/10.1111/1755-0998.13315
BRACCINI, J.M. & NEWMAN, S.J. (2020) Limitations on inferring shark vulnerability from spatial habitat protection. Response to Shark conservation hindered by lack of habitat protection. Global Ecology and Conservation, 24: e01219 https://dx.doi.org/10.1016/j.gecco.2020.e01219
CEYHAN, T. & AKYOL, O. & DEMIR-SAGLAM, Y. & SEN, H. & OZGUL, A. & DUZBASTILAR, F.O. (2020) The gathering of predators around the sea-cage fish farms in the Aegean Sea. Cahiers De Biologie Marine, 61 (4): 361-368 https://dx.doi.org/10.21411/cbm.a.f8856c42
CLARK-SHEN, N. & TINGTING, K.X. & RAO, M. & COSENTINO-ROUSH, S. & SANDRASEGEREN, R. & GAJANUR, A.R. & CHAPMAN, D.D. & YING, E.L.X. & FLOWERS, K.I. & FELDHEIM, K.A. & MANJAJI-MATSUMOTO, B.M. & HUI, S.N.Z. (2021) The sharks and rays at Singapore's fishery ports. Fisheries Research, 235: 105805 https://dx.doi.org/10.1016/j.fishres.2020.105805
CLAVAREAU, L. & SABARROS, P.S. & ESCALLE, L. & BACH, P. & ABASCAL, F.J. & LOPEZ, J. & MURUA, H. & ALAYON, P.J.P. & RAMOS, M.L. & RUIZ, J. & MERIGOT, B. (2020) Elasmobranch bycatch distributions and mortality: Insights from the European tropical tuna purse-seine fishery. Global Ecology and Conservation, 24: e01211 https://dx.doi.org/10.1016/j.gecco.2020.e01211
COLEFAX, A.P. & BUTCHER, P.A. & PAGENDAM, D.E. & KELAHER, B.P. (2020) Comparing distributions of white, bull, and tiger sharks near and away from the surf break using three tech-based methods. Ocean & Coastal Management, 198: 105366 https://dx.doi.org/10.1016/j.ocecoaman.2020.105366
CONSALES, G. & MARSILI, L. (2021) Assessment of the conservation status of Chondrichthyans: underestimation of the pollution threat. European Zoological Journal, 88 (1): 165-180 https://dx.doi.org/10.1080/24750263.2020.1858981
DE OLIVEIRA LANA, F. & SOARES, K.D.A. & HAZIN, F.H.V. & GOMES, U.L. (2021) Description of the chondrocranium of the silky shark Carcharhinus falciformis with comments on the cranial terminology and phylogenetic implications in carcharhinids (Chondrichthyes, Carcharhiniformes, Carcharhinidae). Journal of Morphology, in press https://dx.doi.org/10.1002/jmor.21339
DEL MORAL-FLORES, L.F. & GRANADOS-GAYOSSO, S. & ANISLADO-TOLENTINO, V. (2020) Maximum number of pups of Narcine bancroftii (Elasmobranchii: Narcinidae) from the Southwestern Gulf of Mexico. Cahiers De Biologie Marine, 61 (5): 507-510 https://dx.doi.org/10.21411/cbm.a.74c02653
DOMINGUES, R.R. & BUNHOLI, I.V. & PINHAL, D. & ANTUNES, A. & MENDONCA, F.F. (2021) From molecule to conservation: DNA-based methods to overcome frontiers in the shark and ray fin trade. Conservation Genetics Resources, in press https://dx.doi.org/10.1007/s12686-021-01194-8
DUCHATELET, L. & MARION, R. & MALLEFET, J. (2021) A Third Luminous Shark Family: Confirmation of Luminescence Ability for Zameus squamulosus (Squaliformes; Somniosidae). Photochemistry and Photobiology, in press https://dx.doi.org/10.1111/php.13393
EHEMANN, N.R. & GARCÍA-RODRÍGUEZ, F.J. & PEQUEÑO, G. & THIEL, R. & DE LA CRUZ-AGÜERO, J. (2021) Historical records of the blotched stingray Urotrygon chilensis (Urotrygonidae: Myliobatiformes) yield insight into species distribution: the importance of natural history collections to questions of zoogeography. Systematics and Biodiversity, in press https://dx.doi.org/10.1080/14772000.2020.1868607
EMMONS, S.M. & D'ALBERTO, B.M. & SMART, J.J. & SIMPFENDORFER, C.A. (2021) Age and growth of tiger shark (Galeocerdo cuvier) from Western Australia. Marine and Freshwater Research, in press https://dx.doi.org/10.1071/mf20291
FRANZ‐ODENDAAL, T.A. (2020) Skeletons of the Eye: An Evolutionary and Developmental Perspective. Anatomical Record, 303 (1): 150-166 https://dx.doi.org/10.1002/ar.24003
GARBETT, A. & PHILLIPS, N.D. & HOUGHTON, J.D.R. & PRODOHL, P. & THORBURN, J. & LOCA, S.L. & EAGLING, L.E. & HANNON, G. & WISE, D. & POTHANIKAT, L. & GORDON, C. & CLARKE, M. & WILLIAMS, P. & HUNTER, R. & MCSHANE, R. & BRADER, A. & DODD, J. & MCGONIGLE, C. & MCILVENNY, H. & DALY, O. & SURGENOR, R. & VARIAN, S. & VERHOOG, P. & VAN ZONNEVELD, G. & BURKE, L.R. & DAVIES, I. & SOUSTER, T.A. & MAYO, P.A. & SCHWANCK, T.N. & JONES, C.S. & COLLINS, P.C. (2021) The critically endangered flapper skate (Dipturus intermedius): Recommendations from the first flapper skate working group meeting. Marine Policy, 124: 104367 https://dx.doi.org/10.1016/j.marpol.2020.104367
GAYLORD, M.K. & BLADES, E.L. & PARSONS, G.R. (2020) A hydrodynamics assessment of the hammerhead shark cephalofoil. Scientific Reports, 10 (1): 14495 https://dx.doi.org/10.1038/s41598-020-71472-2
GERTSEVA, V.V. & MATSON, S.E. (2021) Right on target: using data from targeted stocks to reconstruct removals of bycatch species, a case study of longnose skate from Northeast Pacific Ocean. Fisheries Research, 236: 105841 https://dx.doi.org/10.1016/j.fishres.2020.105841
GERVAIS, C.R. & NAY, T. & BROWN, C. (2021) Friend or foe? Development of odour detection, differentiation and antipredator response in an embryonic elasmobranch. Marine and Freshwater Research, in press https://dx.doi.org/10.1071/mf20108
GUIRKINGER, L. & ROJAS-PEREA, S. & ENDER, I. & RAMSDEN, M. & LENTON-LYONS, C. & GELDMANN, J. (2021) Motivations for compliance in Peruvian manta ray fisheries. Marine Policy, 124: 104315 https://dx.doi.org/10.1016/j.marpol.2020.104315
HOFFMAYER, E.R. & MCKINNEY, J.A. & FRANKS, J.S. & HENDON, J.M. & DRIGGERS, W.B. & FALTERMAN, B.J. & GALUARDI, B. & BYRNE, M.E. (2021) Seasonal Occurrence, Horizonta l Movements, and Habitat Use Patterns of Whale Sharks (Rhincodon typus) in the Gulf of Mexico. Frontiers in Marine Science, 7: 598515 https://dx.doi.org/10.3389/fmars.2020.598515
IGLESIAS, S.P. & BERGOT, P. & BRETON, P. & BRUNELLE, S. & CAMUSAT, M. & CAUSSE, R. & CHARBONNEL, E. & CHEVALDONNE, P. & CORDIER, Y. & COSQUER, P. & CUILLANDRE, J.P. & CURD, A. & DUBAS, R. & DUHAU, M. & DERRIEN-COURTEL, S. & DEVIQUE, G. & DIXNEUF, S. & DUHAMEL, E. & FARQUE, P.A. & FRANCOUR, P. & FONTANA, Y. & GAMON, A. & GICQUEAU, C. & GOASCOZ, N. & HASSANI, S. & JADAUD, A. & KOPP, D. & LAMOUR, L. & LE BRIS, S. & LEVEQUE, L. & LIGER, P. & LORANCE, P. & LOUISY, P. & MARAN, V. & MEHAULT, S. & METRAL, L. & MORIN-REPINCAY, A. & MOUCHEL, O. & PERE, A. & QUERO, J.C. & RENOULT, J.P. & ROCHE, F. & SCHWEYER, L. & SPITZ, J. & THIRIET, P. & THOMAS, W. (2020) French ichthyological records for 2018. Cybium, 44 (4): 285-307 https://dx.doi.org/10.26028/cybium/2020-444-001
JAMBURA, P. & ĆETKOVIĆ, I. & KRIWET, J. & TÜRTSCHER, J. (2021) Using historical and citizen science data to improve knowledge about the occurrence of the elusive sandbar shark Carcharhinus plumbeus (Chondrichthyes – Carcharhinidae) in the Adriatic Sea. Mediterranean Marine Science, 22 (1): 169-179 https://dx.doi.org/10.12681/mms.24624
JAUREGUIZAR, A.J. & DE WYSIECKI, A.M. & CAMIOLO, M.D. (2021) Environmental influence on the inter-annual demographic variation of the narrownose smooth-hound shark (Mustelus schmitti, Springer 1939) in the Northern Argentine Coastal System (El Rincon, 38-42 degrees S). Marine Biology Research, 16 (8-9): 600-615 https://dx.doi.org/10.1080/17451000.2020.1868522
JORDAN, R.P. & GRAHAM, C.T. & MINTO, C. & HENDERSON, A.C. (2021) Assessment of sperm storage across different reproductive modes in the elasmobranch fishes. Environmental Biology of Fishes, 104 (1): 27-39 https://dx.doi.org/10.1007/s10641-020-01051-x
KNEEBONE, J. & SULIKOWSKI, J. & KNOTEK, R. & MCELROY, W.D. & GERVELIS, B. & CURTIS, T. & JUREK, J. & MANDELMAN, J. (2020) Using conventional and pop-up satellite transmitting tags to assess the horizontal movements and habitat use of thorny skate (Amblyraja radiata) in the Gulf of Maine. ICES Journal of Marine Science, 77 (7-8): 2790-2803 https://dx.doi.org/10.1093/icesjms/fsaa149
KUMAR, M.K. & JAYAKUMAR, N. & KARUPPASAMY, K. & MANIKANDAVELU, D. & UMA, A. & KAVIPRIYA, M. (2021) Length‐weight relationships of eight elasmobranch species captured along the Coromandel coast of Tamil Nadu, Eastern Indian Ocean. Journal of Applied Ichthyology, in press https://dx.doi.org/10.1111/jai.14179
LE BUSQUE, B. & DORRIAN, J. & LITCHFIELD, C. (2021) The impact of news media portrayals of sharks on public perception of risk and support for shark conservation. Marine Policy, 124: 104341 https://dx.doi.org/10.1016/j.marpol.2020.104341
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Scientists say they have found that three deepwater shark species living off New Zealand glow in the dark.
Climate change shrinks and shifts juvenile white shark range
- Date: February 9, 2021
- Source: Monterey Bay Aquarium
- Summary: Unprecedented sightings of juvenile white sharks at the northern end of Monterey Bay signal a significant shift in the young white sharks' range. Researchers conclude the northward range shift demonstrates the young sharks are being subjected to a loss of suitable thermal habitat, meaning water temperatures within their preferred temperature range are becoming harder to find.
Whale sharks show remarkable capacity to recover from injuries, including partial fin re-growing
- Date: February 23, 2021
- Source: University of Southampton
- Summary: A new study explores the extraordinary rate at which the world's largest fish, the endangered whale shark, can recover from its injuries. The findings reveal that lacerations and abrasions, increasingly caused through collisions with boats, can heal in a matter of weeks and researchers found evidence of partially removed dorsal fins re-growing.
Mysteries of soupfin shark migration and reproduction
Tracking the U.S. population of soupfin sharks yields firsts for science, implications for management and conservation
- Date: March 3, 2021
- Source: University of California - San Diego
- Summary: First conclusive evidence in any animal of triennial philopatry, referring to the periodic return of an animal to the same location. Study has implications for conservation of this critically endangered species.