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 +6 more
doaj +3 more sources
The Phenomenon of Piebaldism in Sharks: A Review of Global Sightings and Patterns [PDF]
Ecology and EvolutionChromatic 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 +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 +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 EvolThis 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 +5 more
europepmc +2 more sources
Genomic Tracking of Market-Derived Bull Shark Fins Back to Source Population of Origin. [PDF]
Mol EcolABSTRACT International trade of shark fins remains difficult to monitor because products are rarely labelled to species and are often highly processed, resulting in severely degraded DNA. For several shark species listed under Appendix II of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), this limits ...
Devloo-Delva F +6 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 +4 more
doaj +2 more sources
Environmental and Protection Effects of Shark-Companion Associations Across Three Ocean Basins. [PDF]
Ecol EvolCompanion 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
Complete mitochondrial genome of the gray reef shark, Carcharhinus amblyrhynchos (Carcharhiniformes: Carcharhinidae) [PDF]
Mitochondrial DNA. Part B. Resources, 2020 We report the first mitochondrial genome sequences for the gray reef shark, Carcharhinus amblyrhynchos. Two specimens from the British Indian Ocean Territory were sequenced independently using two different next generation sequencing methods, namely ...
Nicholas Dunn +7 more
doaj +5 more sources
Global stock structure of the Silky shark (Carcharhinus falciformis, Carcharhinidae) assessed with high-throughput DNA sequencing [PDF]
PeerJSilky shark (Carcharhinus falciformis, Carcharhinidae) numbers have declined steeply in recent decades due to the fin fishery and bycatch in pelagic fisheries.
Derek W. Kraft +11 more
doaj +3 more sources
Testicular Morphology and Spermatogenesis in Potamotrygon motoro: Insights Into Reproduction of Freshwater Stingrays. [PDF]
J MorpholElectron microscopy of Potamotrygon motoro spermatozoa. a – Illustration of a schematic sperm cell depicting the helical head, intermediate piece (midpiece), and flagellum. b ‐ Helical heads (Hh) of spermatozoa inserted into the cytoplasm of Sertoli cells (S) through openings in the plasma membrane. Scales: 10 μm.
Delgado MLR +6 more
europepmc +2 more sources