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Behavioural thermoregulation linked to foraging in blue sharks
Behavioural thermoregulation linked to foraging in blue sharks Yuuki Y. Watanabe, Itsumi Nakamura, Wei-Chuan Chiang ABSTRACT: Large pelagic fishes often dive and surface repeatedly as if they were airbreathers, raising a question about the functions of these movements. Some species (e.g., bigeye tuna, ocean sunfish) apparently alternate foraging in deep cold waters and rewarming in
Novel Insights Into the Genetic Population Connectivity of Transient Whale Sharks in Pacific Panama
Novel Insights Into the Genetic Population Connectivity of Transient Whale Sharks (Rhincodon typus) in Pacific Panama Provide Crucial Data for Conservation Efforts Héctor M. Guzmán, Caitlin E. Beaver, Edgardo Díaz-Ferguson ABSTRACT: The whale shark (Rhincodon typus) is an endangered and highly migratory species, of which solitary individuals or aggregations are observed in oceans worldwide and
Global shifts in species richness have shaped carpet shark evolution
Global shifts in species richness have shaped carpet shark evolution Bret M Boyd, Jason C Seitz ABSTRACT: Background: The evolutionary processes that shape patterns of species richness in marine ecosystems are complex and may differ between organismal groups. There has been considerable interest in understanding the evolutionary processes that led to marine species richness being
Potential of electric fields to reduce bycatch of highly threatened sawfishes
Potential of electric fields to reduce bycatch of highly threatened sawfishes Kátya Abrantes, Adam Barnett, Maarten Soetaert, Peter M. Kyne, Adrianne Laird, Lyle Squire, Jamie Seymour, Barbara E. Wueringer, Jessica Sleeman, Charlie Huveneers ABSTRACT: Sawfishes are among the most threatened families of marine fishes and are susceptible to incidental capture in net fisheries. Since bycatch
Leveraging shark-fin consumer preferences to deliver sustainable fisheries
Leveraging shark-fin consumer preferences to deliver sustainable fisheries Xuehong Zhou, Hollie Booth, Mingzhe Li, Zhifan Song, Douglas C. MacMillan, Wei Zhang, Qiang Wang, Diogo Veríssimo ABSTRACT: At least one third of sharks and their cartilaginous relatives (Class Chondrichthyes) meet the IUCN Red List Criteria for being threatened with extinction. Overfishing is the primary threat, with
Investigating Attitudes Toward Sharks in Australia
Investigating Attitudes Toward Sharks in Australia Brianna Le Busque, Philip Roetman, Jillian Dorrian, Carla Litchfield ABSTRACT: Understanding attitudes toward sharks and the factors associated with them is important for promoting positive attitudes and support for conservation initiatives. We aimed to investigate attitudes toward two different shark species in an Australian context: white sharks (Carcharodon carcharias,
Site fidelity and shallow genetic structure in the common smooth-hound shark confirmed
Site fidelity and shallow genetic structure in the common smooth-hound shark Mustelus mustelus confirmed by tag-recapture and genetic data Juliana D. Klein, Tamaryn A. Asbury, Charlene da Silva, Kelvin L. Hull, Matthew L. Dicken, Enrico Gennari, Simo N. Maduna, Aletta E. Bester-van der Merwe ABSTRACT: The common smooth-hound shark, Mustelus mustelus, is a widely distributed
A rare occurrence of a whale shark in a contaminated estuary in the Southwest Atlantic Ocean
A rare occurrence of a whale shark (Rhincodon typus) in a contaminated estuary in the Southwest Atlantic Ocean Lorena Nascimento, João Batista Teixeira, Luciano Cajaíba, Jonathas Barreto, Amanda Giacomo, Nelson Barcelos, Agnaldo Martins ABSTRACT: An individual whale shark (Rhincodon typus) was recorded on January 15, 2020, during the marine megafauna drone-monitoring. The animal was filmed
Nursery habitat use patterns of the scalloped hammerhead shark in coastal areas of the central Mexican Pacific
Nursery habitat use patterns of the scalloped hammerhead shark, Sphyrna lewini, in coastal areas of the central Mexican Pacific Antonio Corgos, Alejandro Rosende-Pereiro ABSTRACT: This work aimed to characterize the nursery habitat use patterns of the scalloped hammerhead shark, Sphyrna lewini (SPL), in coastal areas of Jalisco and Colima, through the birth pattern, space–time distribution
First evidence of regional migration of the copper shark the Southwest Atlantic
First evidence of regional migration of the copper shark Carcharhinus brachyurus (Günther, 1870) in the Southwest Atlantic Juan M. Cuevas, Mirta L. García, Sebastián Gómez, Gustavo E. Chiaramonte, ABSTRACT: Regional migration of the copper shark Carcharhinus brachyurus was recorded for the first time in the Southwest Atlantic (SWA) from Argentina (latitude: –38.1037, longitude: –57.5371) to
Economic Value and Public Perceptions of Whale Shark Tourism in Nosy Be
Economic Value and Public Perceptions of Whale Shark Tourism in Nosy Be, Madagascar Ziegler, Jackie A.; Diamant, Stella; Pierce, Simon J.; Bennett, Rhett; Kiszka, Jeremy J. ABSTRACT: Nosy Be in northwestern Madagascar is home to a globally important whale shark (Rhincodon typus) aggregation and a growing whale shark tourism industry. However, whale sharks are not
Bacterial community dynamics during embryonic development of the little skate
Bacterial community dynamics during embryonic development of the little skate (Leucoraja erinacea) Katelyn Mika, Alexander S Okamoto, Neil H Shubin, David B Mark Welch ABSTRACT: Background: Microbial transmission from parent to offspring is hypothesized to be widespread in vertebrates. However, evidence for this is limited as many evolutionarily important clades remain unexamined. There is currently
State of Shark and Ray Genomics in an Era of Extinction
State of Shark and Ray Genomics in an Era of Extinction Jessica Pearce, Matthew W. Fraser, Ana M. M. Sequeira, Parwinder Kaur ABSTRACT: Chondrichthyan species (sharks, rays, skates, and chimeras) are a class of high ecological, economic, and cultural significance, and yet they are the most threatened taxa in the marine environment. The creation of
Species substitution and mislabeling in the swordfish market in Santiago, Chile
Species substitution and mislabeling in the swordfish (Xiphias gladius) market in Santiago, Chile: Implications in shark conservation Pablo Dufflocq, María Angélica Larraín, Cristian Araneda ABSTRACT: Food fraud and the conservation and trade of threatened species are topics of high concern. Some shark species are considered in this category by IUCN and CITES, and can enter
Observations of sharks at Europa Island
Observations of sharks (Elasmobranchii) at Europa Island, a remote marine protected area important for shark conservation in the southern Mozambique Channel Mireille M. M. Guillaume, Bernard Séret ABSTRACT: Sharks have declined worldwide and remote sanctuaries are becoming crucial for shark conservation. The southwest Indian Ocean is a hotspot of both terrestrial and marine biodiversity mostly