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Artificial Insemination and Parthenogenesis in the Zebra Shark Stegostoma tigrinum
Artificial Insemination and Parthenogenesis in the Zebra Shark Stegostoma tigrinum Lance Adams, Kady Lyons, Elizabeth Larkin, Nicole Leier, Janet Monday, Chris Plante, Jean Dubach, Jennifer Wyffels ABSTRACT: Maintaining self-sustaining populations of zoo and aquarium collections can be challenged when natural reproduction fails within mixed-sex populations; however, reproductive success can sometimes be restored with the application
The occurrence and feeding of a critically endangered shark species, Oxynotus centrina in the Sea of Marmara
The occurrence and feeding of a critically endangered shark species, Oxynotus centrina in the Sea of Marmara Güzin Gül, Mehmet Baki Yokeş, Nazli Demirel ABSTRACT: The angular roughshark, Oxynotus centrina (Linnaeus, 1758), is a rarely encountered deep-sea demersal shark species. It is listed as “Critically Endangered” in the IUCN’s regional assessment for the Mediterranean. Like
Prey interactions in tiger sharks
Prey interactions in tiger sharks: Accounting for visual perception in animal-borne cameras Laura A. Ryan, Samantha Andrzejaczek. Adrian C. Gleiss, Mark G. Meekan, Taylor K.Chapple, Nathan S.Hart ABSTRACT: The ‘evolutionary arms race’ between predator and prey is responsible for many physiological, morphological, and behavioural adaptations and some of the most compelling examples relate to the
Spatio-Temporal Distribution of Juvenile Oceanic Whitetip Shark Incidental Catch in the Western Indian Ocean
Spatio-Temporal Distribution of Juvenile Oceanic Whitetip Shark Incidental Catch in the Western Indian Ocean Leire Lopetegui-Eguren, Jan Jaap Poos, Haritz Arrizabalaga, Gency L. Guirhem, Hilario Murua, Nerea Lezama-Ochoa, Shane P. Griffiths, Jon Ruiz Gondra, Philippe S. Sabarros, José Carlos Báez, Maria José Juan-Jordá ABSTRACT: Oceanic whitetip shark (Carcharhinus longimanus) is an important top predator in
Ontogenetic shift in diet and trophic role of Raja clavata inferred by stable isotopes and stomach content analysis in the Sea of Marmara
Ontogenetic shift in diet and trophic role of Raja clavata inferred by stable isotopes and stomach content analysis in the Sea of Marmara Güzin Gül, Nazli Demirel ABSTRACT: Trophic ecology studies on predator-prey interactions reveal insights into ecological communities and help understand a species’ role in the food web by contributing to improved fisheries management
Trophic position of Otodus megalodon and great white sharks through time revealed by zinc isotopes
Trophic position of Otodus megalodon and great white sharks through time revealed by zinc isotopes Jeremy McCormack, Michael L. Griffiths, Sora L. Kim, Kenshu Shimada, Molly Karnes, Harry Maisch, Sarah Pederzani, Nicolas Bourgon, Klervia Jaouen, Martin A. Becker, Niels Jöns, Guy Sisma-Ventura, Nicolas Straube, Jürgen Pollerspöck, Jean-Jacques Hublin, Robert A. Eagle, Thomas Tütken ABSTRACT: Diet
Population structure and seasonal presence of whale sharks in the Gulf of Thailand
Citizen science reveals the population structure and seasonal presence of whale sharks in the Gulf of Thailand Kirsty Magson, Emily Monacella, Chad Scott, Noémie Buffat, Sirachai Arunrugstichai, Metavee Chuangcharoendee, Simon J. Pierce, Jason Holmberg, Gonzalo Araujo ABSTRACT: The whale shark Rhincodon typus is a broadly distributed and highly mobile planktivorous shark species. The sharks form
M-Risk: A framework for assessing global fisheries management efficacy of sharks, rays, and chimaeras
M-Risk: A framework for assessing global fisheries management efficacy of sharks, rays, and chimaeras C. Samantha Sherman, Glenn Sant, Colin A. Simpfendorfer, Eric D. Digel, Patrick Zubick, Grant Johnson, Michael Usher, Nicholas K. Dulvy ABSTRACT: Fisheries management is essential to guarantee sustainable capture of target species and avoid undesirable declines of incidentally captured species. A
Recreational and small-scale shark fisheries in Kenya
Integrating long-term citizen science data and contemporary artisanal fishery survey data to investigate recreational and small-scale shark fisheries in Kenya Nina Wambiji, Nelly Isigi Kadagi, Bernadine I. Everett, Andrew J. Temple, Jeremy J. Kiszka, Edward Kimani, Per Berggren ABSTRACT: Shark catches are common in small-scale (artisanal) and recreational fisheries; the magnitudes of these catches remain
Microplastics in Demersal Sharks From the Southeast Indian Coastal Region
Microplastics in Demersal Sharks From the Southeast Indian Coastal Region Madhuvandhi Janardhanam, Priya Sivakumar, Gomathi Srinivasan, Rekha Sivakumar, Priscilla Niranjani Marcus, Sujatha Balasubramaniam, Krishnamurthy Rajamanickam, Thiagarajan Raman, Gopalakrishnan Singaram, Thilagam Harikrishnan ABSTRACT: Microplastic (MPs) contamination has emerged as a serious worldwide issue. Human activity, commercial enterprises, and fishing are concentrated around the seashore, causing high
Unintended effects of single-species fisheries management
Unintended effects of single-species fisheries management Mariana Tolotti, Patrice Guillotreau, Fabien Forget, Manuela Capello, Laurent Dagorn ABSTRACT: Ecosystem-based management is widely recognized as the path to achieve sustainability of ecosystem services. Tuna Fisheries Management Organizations have incorporated an ecosystem approach into their mandate, but their decision-making process essentially relies on individual stock assessments. This study
First recorded case of leucism in the velvet belly lantern shark
First recorded case of leucism in the velvet belly lantern shark Etmopterus spinax (Squaliformes: Etmopteridae) Juan Carlos Arronte, Ana Antolínez, Rafael Bañón, José Rodríguez-Gutiérrez, Juan José Ortíz, Juan Manuel Martínez ABSTRACT: The capture of a female specimen of the velvet belly lantern shark Etmopterus spinax with abnormal skin coloration is reported. The specimen was captured
Changing trends: Beliefs and attitudes toward sharks and implications for conservation
Changing trends: Beliefs and attitudes toward sharks and implications for conservation Joao Neves, Terran McGinnis, Jean-Christophe Giger ABSTRACT: As history shows, and contrary to modern western society’s feelings, sharks were once respected and worshipped. Sensationalized media coverage negatively impacts the public’s perception of sharks and lack of information about management and conservation options negatively impacts
A Fine Developmental Timeline of Kong Skate
How the Skate Embryo Develops: A Fine Developmental Timeline of Kong Skate Okamejei kenojei (Müller & Henle, 1841) Gao Guang, Xiao Zhizhong, Ma Yuting, Chen Xiao, Xiao Yongshuang, Li Jun ABSTRACT: Cartilaginous fishes, as an important group of jawed vertebrates, hold great promise for improving our understanding of vertebrate evolution. Previous studies have established a
Grouping behaviour impacts on the parasitic pressure and squamation of sharks
Grouping behaviour impacts on the parasitic pressure and squamation of sharks Humberto G. Ferrón and Jose F. Palacios-Abella ABSTRACT: The evolution of grouping behaviour involves a complex trade-off of benefits and costs. Among the latter, an increase in the risk of parasitic transmission is a well-documented phenomenon that has likely promoted the evolution of defensive