Results 1 to 10 of about 547 (159)

The Phenomenon of Piebaldism in Sharks: A Review of Global Sightings and Patterns [PDF]

Ecology and Evolution
Chromatic disorders in elasmobranchs (sharks and rays) have been reported in several species, but little is known about their true abundance or consequences for survival and fitness.
Darren A. Whitehead, Andrea Parmegiani, Jacopo Gobbato, Mohamed Mizyan, Arzucan Askin, Sara Scroglieri, Paolo Galli, Davide Seveso, Simone Montano, Joel H. Gayford   +9 more
doaj   +2 more sources

Complete mitochondrial genome and phylogenetic analysis of the copper shark Carcharhinus brachyurus (Günther, 1870) [PDF]

Mitochondrial DNA. Part B. Resources, 2021
Copper shark (Carcharhinus brachyurus Günther, 1870) is one of the most widely distributed but least known species in the family Carcharhinidae. Herein, we report the first complete mitogenome of C. brachyurus.
Sang Wha Kim, Seon Young Park, Hyemin Kwon, Sib Sankar Giri, Sang Guen Kim, Jeong Woo Kang, Jun Kwon, Sung Bin Lee, Won Joon Jung, JunMo Lee, Se Chang Park, Ji Hyung Kim   +11 more
doaj   +2 more sources

Cameras or Divers? How Baited Remote Underwater Videos and 'Long Swims' Underwater Visual Census Complement Each Other on Coral Reefs. [PDF]

Ecol Evol
This study compares baited remote underwater videos (BRUV) and a rapid timed long swim (LS) UVC method to evaluate their ability in assessing relative abundance and diversity of large predatory reef fish from nine selected families. BRUVs were more effective in detecting mobile and bait‐attracted taxa such as Carangidae and recorded up to 28 unique ...
Osuka-Edeye K, Samoilys M, Stewart BD, McClean CJ, Musembi P, Yahya S.   +5 more
europepmc   +2 more sources

Characterization of the complete mitochondrial genome of blacktip shark Carcharhinus limbatus (Carcharhiniformes: Carcharhinidae) [PDF]

Mitochondrial DNA. Part B. Resources, 2022
In this study, we aimed to determine the complete mitochondrial genome of blacktip shark Carcharhinus limbatus. The mitochondrial genome was 16,705 bp in length, including 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes, and a control region ...
Xiaolin Huang, Zanhu Zhou, Tinghe Lai, Binyuan He, Demin Zhang   +4 more
doaj   +2 more sources

Environmental and Protection Effects of Shark-Companion Associations Across Three Ocean Basins. [PDF]

Ecol Evol
Companion species frequently associate with large marine hosts, yet the ecological drivers of these relationships remain poorly understood. Using a global dataset of midwater BRUVS deployments, we modelled the presence and abundance of shark‐companion associations across seven shark species and three ocean basins.
Walker JK, Meeuwig JJ, Thompson CDH.
europepmc   +2 more sources

Limited Evidence for Depth Specialism in Isolated Seamount Reef Predators. [PDF]

Ecol Evol
We investigated how depth influences predatory fish assemblages on seamount reefs in the Coral Sea using remotely operated vehicle surveys across a 100 m depth gradient. Predator abundance and species richness declined significantly with depth; yet assemblage composition remained largely consistent, suggesting many taxa utilise a broad depth range ...
Cresswell BJ, Galbraith GF, Barnett A, Harrison HB, Jones GP, McClure EC, Quimpo TJR, Hoey AS.   +7 more
europepmc   +2 more sources

Reconstructing historical catch trends of threatened sharks and rays based on fisher ecological knowledge. [PDF]

Conserv Biol
Abstract Small‐scale fisheries often lack historical shark and ray catch information, hampering their management. We reconstructed historical catch trends and current fishing pressure by combining local ecological knowledge, satellite‐based vessel counts, and a short‐term landing‐site survey.
Leurs G, Jabado RW, Camará A, Dos Santos L, Nonque DM, Zuidewind TJ, Barry I, Campredon P, Blaschke B, de Boer K, Hijner N, Olff H, Pontes SL, Regalla A, Walsh MB, Govers LL.   +15 more
europepmc   +2 more sources

Parturition time for the Blacktip shark, Carcharhinus limbatus (Carcharhiniformes: Carcharhinidae), in Southwestern Atlantic [PDF]

Neotropical Ichthyology, 2020
The determination of the period of parturition and identification of nursery areas are fundamental for the management and conservation of a fishing resource.
Jones Santander Neto, Leandro Yokota
exaly   +3 more sources

New Occurrences of the Tiger Shark (Galeocerdo cuvier) (Carcharhinidae) off the Coast of Rio de Janeiro, Southeastern Brazil: Seasonality Indications [PDF]

Animals, 2022
The tiger shark Galeocerdo cuvier (Péron & Lesueur, 1822) (Carcharhinidae) is classified as near-threatened along the Brazilian coast, in line with its global categorization.
Izar Aximoff, Rodrigo Cumplido, Marcelo Tardelli Rodrigues, Ubirajara Gonçalves de Melo, Eduardo Barros Fagundes Netto, Sérgio Ricardo Santos, Rachel Ann Hauser-Davis   +6 more
doaj   +2 more sources

Global stock structure of the Silky shark (Carcharhinus falciformis, Carcharhinidae) assessed with high-throughput DNA sequencing [PDF]

PeerJ
Silky shark (Carcharhinus falciformis, Carcharhinidae) numbers have declined steeply in recent decades due to the fin fishery and bycatch in pelagic fisheries.
Derek W. Kraft, Emily E. Conklin, Evan B. Freel, Melanie Hutchinson, Julia L.Y. Spaet, Robert J. Toonen, Zac H. Forsman, Michael I. Grant, John David Filmalter, John R. Hyde, Simon J.B. Gulak, Brian W. Bowen   +11 more
doaj   +3 more sources