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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
Individual haplotyping of whale sharks from seawater environmental DNA
Individual haplotyping of whale sharks from seawater environmental DNA Laurence Dugal, Luke Thomas, Mads Reinholdt Jensen, Eva Egelyng Sigsgaard, Tiffany Simpson, Simon Jarman, Philip Francis Thomsen, Mark Meekan ABSTRACT: Population genetic data can provide valuable information on the demography of a species. For rare and elusive marine megafauna, samples for generating the data are traditionally
Shark VNAR antibodies neutralize SARS-CoV-2 infection
Single domain shark VNAR antibodies neutralize SARS-CoV-2 infection in vitro Aziz Gauhar, Cyril V Privezentzev, Mykhaylo Demydchuk, Tanja Gerlza, Julia Rieger, Andreas J Kungl, Frank S Walsh, J Lynn Rutkowski, Pawel Stocki ABSTRACT: Single domain shark VNAR antibodies can offer a viable alternative to conventional Ig-based monoclonal antibodies in treating COVID-19 disease during the current
Approaching the “real” state of elasmobranch fisheries and trade
Approaching the “real” state of elasmobranch fisheries and trade: A case study from the Mediterranean I. Giovos, R.N. Aga Spyridopoulou, N. Doumpas, K. Glaus, P. Kleitou, Z. Kazlari, D. Katsada, D. Loukovitis, I. Mantzouni, M. Papapetrou, Y.P. Papastamatiou, D.K. Moutopoulos ABSTRACT: Elasmobranchs are sensitive marine species due to their K-strategic life characteristics in combination with
Effects of climate-change driven gradual and acute temperature changes on shark and ray species
Effects of climate-change driven gradual and acute temperature changes on shark and ray species Geoffrey J. Osgood, Easton R. White, Julia K. Baum ABSTRACT: Climate change is altering distributions and abundances of marine species through both gradual and acute changes in temperature and productivity. Due to their high mobility and metabolic rates, elasmobranchs (sharks and
Results of the 2021 Freeport Hudson Anglers Shark Tournament
Published on 2 Jul, 2021 at 10:33 in Sport fishing | Viewed times | 1 Comment
48th Annual Freeport Hudson Anglers Shark Tournament Location: Guy Lombardo Marina, Freeport, Long Island, New York, USADate: 18. – 19. June 2021 WINNERS: 1st PlaceSpecies: Thresher shark (Alopias vulpinus)Weight: 345 lbsBoat: Our PassionCaptain: Jacob D’OttavioAngler: Jacob D’OttavioPrize money: $42,065 2nd PlaceSpecies: Thresher shark (Alopias vulpinus)Weight: 233.4 lbsBoat: No TimeCaptain: Nick SeveneAngler: John FarrenPrize money: $5,771