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First genetically confirmed records of the little gulper shark from Cypriot waters
First genetically confirmed records of the little gulper shark Centrophorus uyato (Squaliformes: Centrophoridae) from Cypriot waters Vasiliki Kousteni, Marios Papageorgiou, Michail Rovatsos, Ioannis Thasitis, Louis Hadjioannou ABSTRACT: The taxonomy within the genus Centrophorus has been controversial almost since its origin, raising uncertainties about the identification, the phylogenetic placement and the geographical distribution of several species.
Secondary predation constrains DNA-based diet reconstruction in two threatened shark species
Secondary predation constrains DNA-based diet reconstruction in two threatened shark species Mark de Bruyn, Matteo Barbato, Joseph D. DiBattista, Matt K. Broadhurst ABSTRACT: Increasing fishing effort, including bycatch and discard practices, are impacting marine biodiversity, particularly among slow-to-reproduce taxa such as elasmobranchs, and specifically sharks. While some fisheries involving sharks are sustainably managed, collateral mortalities
Non-random Co-occurrence of Juvenile White Sharks at Seasonal Aggregation Sites in Southern California
Non-random Co-occurrence of Juvenile White Sharks (Carcharodon carcharias) at Seasonal Aggregation Sites in Southern California James M. Anderson, Alyssa J. Clevenstine, Brian S. Stirling, Echelle S. Burns, Emily N. Meese, Connor F. White, Ryan K. Logan, John O’Sullivan, Patrick T. Rex, Jack May (III), Kady Lyons, Chuck Winkler, Emiliano García-Rodríguez, Oscar Sosa-Nishizaki, Christopher G. Lowe
Age and growth estimates of the blue shark from Papua New Guinea
Preliminary age and growth estimates of the blue shark (Prionace glauca) from Papua New Guinea Sushmita Mukherji, Jonathan Smart, Brooke D’Alberto, Leontine Baje, Andrew Chin, William White, Colin A. Simpfendorfer ABSTRACT: Blue sharks (Prionace glauca) are recognised as one of five key pelagic shark species in the Western Central Pacific Ocean (WCPO) due to their
Elasmobranch microbiomes
Elasmobranch microbiomes: emerging patterns and implications for host health and ecology Cameron T. Perry, Zoe A. Pratte, Ana Clavere-Graciette, Kim B. Ritchie, Robert E. Hueter, Alisa L. Newton, G. Christopher Fischer, Elizabeth A. Dinsdale, Michael P. Doane, Krystan A. Wilkinson, Kim Bassos-Hull, Kady Lyons, Alistair D. M. Dove, Lisa A. Hoopes, Frank J. Stewart ABSTRACT:
Effectiveness Against White Sharks of the Rpela Personal Shark Deterrent Device Designed for Surfers
Effectiveness Against White Sharks of the Rpela Personal Shark Deterrent Device Designed for Surfers Blount, Craig; Pygas, Dan; Lincoln Smith, Marcus P.; McPhee, Daryl P.; Bignell, Colby; and Ramsey, Ocean ABSTRACT: Many shark bites to humans, including fatalities, have involved surfers. Various personal shark deterrents are commercially available to surfers, including Rpela v2, which is
Connecting post-release mortality to the physiological stress response of large coastal sharks in a commercial longline fishery
Connecting post-release mortality to the physiological stress response of large coastal sharks in a commercial longline fishery Nicholas M. Whitney, Karissa O. Lear, John J. Morris, Robert E. Hueter, John K. Carlson, Heather M. Marshall ABSTRACT: Bycatch mortality is a major factor contributing to shark population declines. Post-release mortality (PRM) is particularly difficult to quantify,
Secondary predation constrains DNA-based diet reconstruction in two threatened shark species
Secondary predation constrains DNA-based diet reconstruction in two threatened shark species Mark de Bruyn, Matteo Barbato, Joseph D. DiBattista, Matt K. Broadhurst ABSTRACT: Increasing fishing effort, including bycatch and discard practices, are impacting marine biodiversity, particularly among slow-to-reproduce taxa such as elasmobranchs, and specifically sharks. While some fisheries involving sharks are sustainably managed, collateral mortalities
Species-specific search strategies in sympatric apex predatory sharks
Comprehensive analytical approaches reveal species-specific search strategies in sympatric apex predatory sharks Hannah J. Calich, Jorge P. Rodríguez, Víctor M. Eguíluz, Neil Hammerschlag, Charitha Pattiaratchi, Carlos M. Duarte, Ana M. M. Sequeira ABSTRACT: Animals follow specific movement patterns and search strategies to maximize encounters with essential resources (e.g. prey, favourable habitat) while minimizing exposures to
The shark meat market threatens elasmobranchs in Brazil
Biodiversity on sale: The shark meat market threatens elasmobranchs in Brazil Marcelo Merten Cruz, Bruna Elenara Szynwelski, Thales R. Ochotorena de Freitas ABSTRACT: Elasmobranchs are apex predators that play a crucial role in marine ecosystems by regulating the dynamics of food webs, as well as connecting different trophic levels across habitats. The large-scale removal of
Length–weight relations of 46 uncommon sharks and rays in the Mediterranean Sea
Filling in knowledge gaps: Length–weight relations of 46 uncommon sharks and rays (Elasmobranchii) in the Mediterranean Sea Athanassios C. Tsikliras, Donna Dimarchopoulou ABSTRACT: Large sharks and rays are generally understudied in the Mediterranean Sea, thus leading to a knowledge gap of basic biological characteristics that are important in fisheries management and ecosystem modeling. Out of
Evaluating artisanal fishing of globally threatened sharks and rays in the Bay of Bengal, Bangladesh
Evaluating artisanal fishing of globally threatened sharks and rays in the Bay of Bengal, Bangladesh Alifa Bintha Haque, Rachel D. Cavanagh, Nathalie Seddon ABSTRACT: Sharks and rays are at risk of extinction globally. This reflects low resilience to increasing fishing pressure, exacerbated by habitat loss, climate change, increasing value in a trade and inadequate information
Distribution and Abundance of Coastal Elasmobranchs in Tenerife, Canary Islands
Distribution and Abundance of Coastal Elasmobranchs in Tenerife (Canary Islands, NE Atlantic Ocean) with Emphasis on the Bull Ray, Aetomylaeus bovinus Jorge Manuel Moreno Mendoza, Silvio E. Solleliet-Ferreira, R. Riera ABSTRACT: The current status of the elasmobranchs’ populations and distribution in the Canary Islands is uncertain. Here we investigate the abundance and distribution patterns of
Behavioural response of a whale shark during the passage of a typhoon
Behavioural response of a whale shark during the passage of a typhoon Itsumi Nakamura, Hiroyuki Tsuchida, Kazuki Tone, Kazuyoshi Komeyama, Akira Sasaki, Ryo Kawabe ABSTRACT: During a behavioural survey of a tagged whale shark (Rhincodon typus) conducted in 2019 in the waters off Kagoshima, Japan, a typhoon passed close to the area under surveillance. As
Numerical Abilities in Grey Bamboo Sharks and Ocellate River Stingrays
Counting on Numbers—Numerical Abilities in Grey Bamboo Sharks and Ocellate River Stingrays Nils Kreuter, Nele Christofzik, Carolin Niederbremer, Janik Bollé, Vera Schluessel ABSTRACT: Over the last decade, studies examining the cognitive abilities of fish have increased, using a broad range of approaches. One of the foci has been to test the ability of fish to