Complete mitochondrial genome of the Caribbean reef shark, Carcharhinus perezi (Carcharhinformes: Carcharhinidae) [PDF]
Mitochondrial DNA. Part B. Resources, 2021 The Caribbean reef shark (Carcharhinus perezi; Poey, 1876) is a medium to large-bodied coastal and reef-associated predator found throughout the subtropical and tropical waters of the Atlantic Ocean and Caribbean Sea, although its populations are ...
Austin J. Gallagher +3 more
doaj +2 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
Rapid DNA/eDNA-Based ID Tools for Improved Chondrichthyan Monitoring and Management. [PDF]
Mol Ecol ResourABSTRACT Rapid DNA/eDNA‐based ID tools, which detect specific genetic patterns without requiring sequencing, are essential for biodiversity and wildlife trade monitoring, particularly for species of conservation concern. However, the practical application of these methods remains limited by the availability of standardised protocols, accessibility of ...
Alvarenga MM +13 more
europepmc +2 more sources
Surface morphology and distribution of oropharyngeal taste papillae in sharks and rays (Elasmobranchii, Chondrichthyes): Implications for gustatory sensitivity. [PDF]
J AnatThis study investigates the morphology, abundance, and distribution of taste papillae in the oropharyngeal cavity of a range of elasmobranchs using SEM, histology, and topographic analyses. The interspecific importance of gustation is reflected in quantitative differences in the size, density, and distribution of taste papillae, which have implications
Atkinson CJL, Collin SP.
europepmc +2 more sources
Review of the Freshwater Sharks of Iran (Family Carcharhinidae)
International Journal of Aquatic Biology, 2015 The systematics, morphology, distribution, biology, economic importance and conservation of the bull shark (Carcharhinus leucas) in Iran are described, the species is illustrated, and a bibliography on this fish in Iran is provided.
Brian W. Coad
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Bacterial diversity in the jelly of shark Ampullae of Lorenzini: a holobiont perspective [PDF]
PeerJThe Ampullae of Lorenzini (AoL) are specialized electrosensory organs found in sharks and other chondrichthyans. They allow the detection of electric fields, temperature changes, and salinity variations.
Nataly Bolaño-Martínez +4 more
doaj +3 more sources
Rare evidence of shark-on-shark trophic interactions in the fossil record [PDF]
Acta Palaeontologica Polonica, 2021 Direct evidence of chondrichthyan trophic interactions in the fossil record is largely limited to bite traces on prey items but may also be found within the gut contents of exceptionally well-preserved individuals or as inclusions within coprolites ...
VICTOR J. PEREZ +2 more
doaj +1 more source
High overexploitation risk due to management shortfall in highly traded requiem sharks
Conservation Letters, 2023 Most of the international trade in fins (and likely meat too) is derived from requiem sharks (family Carcharhinidae), yet trade in only two of the 56 species is currently regulated.
C. Samantha Sherman +8 more
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Shark conservation hindered by lack of habitat protection
Global Ecology and Conservation, 2020 Many of the world’s shark populations are in decline, indicating the need for improved conservation and management. Well managed and appropriately located marine parks and marine protected areas (MPAs) have potential to enhance shark conservation by ...
Charlotte A. Birkmanis +4 more
doaj +1 more source