Home » Archives
Genetic diversity in two threatened species of guitarfish from the Brazilian and Argentinian coasts
Genetic diversity in two threatened species of guitarfish (Elasmobranchii: Rhinobatidae) from the Brazilian and Argentinian coasts: an alert for conservation Vanessa P. Cruz, Aisni M.C. L. Adachi, Pablo H. Oliveira Giovana, S. Ribeiro, Fabilene G. Paim, Bruno C. Souza, Alexandre S.F. Rodrigues, Marcelo Vianna, Sergio M. Delpiani, Juan Martín Díaz de Astarloa, Matheus M. Rotundo,
Social representations of sharks
Social representations of sharks, perceived communality, and attitudinal and behavioral tendencies towards their conservation: An exploratory sequential mixed approach João Neves, Jean-Christophe Giger, Nuno Piçarra, Vasco Alves, Joana Almeida ABSTRACT: Sharks are crucial to the marine ecosystem, but they are critically declining. Their bad public image explains, to some extent, the lesser concern for their
Movement of the bull shark in the upper Mississippi River Basin
Movement of the bull shark (Carcharhinus leucas) in the upper Mississippi River Basin, North America Ryan Shell, Nicholas Gardner ABSTRACT: Rare appearances of bull sharks (Carcharhinus leucas) in river systems and other freshwater ecosystems have been reported from five continents. The wide geographic range of this phenomenon, the physiological adaptations of this species to allow
Illegal Fisheries Threatening Shark Conservation in African Waters
Illegal, Unreported, and Unregulated Fisheries Threatening Shark Conservation in African Waters Revealed from High Levels of Shark Mislabelling in Ghana Narkie Akua Agyeman, Carmen Blanco-Fernandez, Sophie Leonie Steinhaussen, Eva Garcia-Vazquez, Gonzalo Machado-Schiaffino ABSTRACT: Mislabelling of fish and fish products has attracted much attention over the last decades, following public awareness of the practice of substituting
New Bull Shark Record Certified in Mississippi
Press Release Mississippi Department of Marine Resources 22. July 2021 — — — — — — — — MDMR certifies five state records BILOXI, Miss. – The Mississippi Department of Marine Resources certified five state fishing records this month. Mason Watts, 12, of Long Beach set the youth record for Red Snapper (Litjanus campechanus) with
Why are some fish warm-blooded? Research points to a crucial speed advantage
Published on 25 Jul, 2021 at 11:51 in Research | Viewed times | No Comments
News Release Trinity College Dublin 1st July 2021 — — — — — — — — New research from marine biologists offers answers to a fundamental puzzle that had until now remained unsolved: why are some fish warm-blooded when most are not? It turns out that while (warm-blooded) fish able to regulate their own body
Endothermy makes fishes faster but does not expand their thermal niche
Endothermy makes fishes faster but does not expand their thermal niche Lucy Harding, Andrew Jackson, Adam Barnett, Ian Donohue, Lewis Halsey, Charles Huveneers, Carl Meyer, Yannis Papastamatiou, Jayson M. Semmens, Erin Spencer, Yuuki Watanabe, Nicholas Payne ABSTRACT: Regional endothermy has evolved several times in marine fishes, and two competing hypotheses are generally proposed to explain
FAO: Better data collection in shark fisheries
Better data collection in shark fisheries – Learning from practice Some species and stocks of sharks, rays, skates, and chimaeras (termed shark in this review) are rapidly depleting due to climate change, land-based influences, and overfishing. These pressures, coupled with sharks’ low reproductive potential (slow growth and delayed maturation; long reproductive cycles; low fecundity; and
Global phylogeography of the smooth hammerhead shark
Global phylogeography of the smooth hammerhead shark: Glacial refugia and historical migration patterns Bruno Lopes da Silva Ferrette, Rui Coelho, Victor Marten Peddemors, Jennifer R. Ovenden, Bruno Alexandre De Franco, Claudio Oliveira, Fausto Foresti, Fernando Fernandes Mendonça ABSTRACT: Extreme climate changes during the Cenozoic Era strengthened different biogeographical barriers that decreased the connectivity among populations,
Forensic genetic identification of sharks involved in human attacks
Forensic genetic identification of sharks involved in human attacks Nicolas Oury, Sébastien Jaquemet, Gwénola Simon, Laurie Casalot, Géry Vangrevelynghe, Fanch Landron, Hélène Magalon ABSTRACT: Each year, 75–100 unprovoked shark attacks on humans are recorded, most of them resulting in no or minor injuries, while a few are fatal. Often, shark identification responsible for attacks relies
3000-year-old shark attack victim from Tsukumo shell-mound, Okayama, Japan
3000-year-old shark attack victim from Tsukumo shell-mound, Okayama, Japan J. Alyssa White, George H. Burgess, Masato Nakatsukasa, Mark J. Hudson, John Pouncett, Soichiro Kusaka, Minoru Yoneda, Yasuhiro Yamada, Rick J. Schulting ABSTRACT: Modern shark attacks are uncommon and archaeological examples are even rarer, with the oldest previously known case dating to ca. AD 1000. Here
Biometric Diversity of Chondrichthyes Caught by Bengkulu City Fishermen
Biometric Diversity of Chondrichthyes Caught by Bengkulu City Fishermen Observed at the Fish Auction Site (TPI) Pulau Baai Bengkulu Novia Duya, Risma Hurhidayah, Jarulis ABSTRACT: Fish is an aquatic animal that has a high diversity. Baai Island Fish Auction Place (TPI) is a fish landing place used as the largest fishing center in the city
Species composition and conservation status of shark from Sri Lanka fisheries
Species composition and conservation status of shark from fishery landings and fish markets in Sri Lanka revealed by DNA barcoding M. Aravinda Kishan Peiris, Terney Pradeep Kumara, R.R.M.K.P. Ranatunga, Shang-Yin Vanson Liua ABSTRACT: Sharks are considered to be top predators in marine ecosystems. Due to the high market value of shark fins, fishing pressure on
Resolution of the Acroteriobatus leucospilus species complex
Resolution of the Acroteriobatus leucospilus species complex, with a redescription of A. leucospilus (Norman, 1926) and descriptions of two new western Indian Ocean species of Acroteriobatus (Rhinopristiformes, Rhinobatidae) Simon Weigmann, David A. Ebert, Bernard Séret ABSTRACT: Recent sampling efforts and examinations of museum material provided evidence for a complex of species within Acroteriobatus leucospilus (Norman,
Examining shark bite scars on dolphins off Bimini
Examining shark bite scars on dolphins off Bimini, The Bahamas: Comparisons between bottlenose and Atlantic spotted dolphins Kelly Melillo-Sweeting, Maria Maust-Mohl, Matthew J. Smukall ABSTRACT: Shark predation risk impacts many facets of dolphin life, including habitat use and foraging strategies. Because direct predation is rarely observed, researchers instead examine dolphins in situ for past injuries