Results 11 to 20 of about 2,748 (207)

Observations on the behavior of Schroederichthys chilensis (Carcharhiniformes, Scyliorhinidae)

open access: yesRevista Peruana de Biología, 2014
Schroederichthys chilensis, the redspotted catshark or chilean catshark, is an endemic species to Peruvian and Chilean waters. Observations on its behavior in the National Reserve System of Guano Islands, Islets, and Capes – Punta San Juan and Paracas ...
Daniel Flores, Grant D. Adams
doaj   +5 more sources

Jenis dan Status Konservasi Ikan Hiu yang Tertangkap di Tempat Pelelangan Ikan (TPI) Labuan Bajo, Manggarai Barat, Flores [PDF]

open access: yesAl-Kauniyah Jurnal Biologi, 2014
The study aimed to determine the types of sharks are caught, sold and conservation status in the fish auction place (TPI) Labuan Bajo, West Manggarai, Flores, East Nusa Tenggara have been conducted in February and March 2014 in Labuan Bajo.
Ismail Syakurachman Alaydrus   +2 more
doaj   +6 more sources

Mitochondrial Genome and Phylogenetic Analysis of the Narrownose Smooth-Hound Shark Mustelus schmitti Springer, 1939 [PDF]

open access: yesAnimals
Southern Brazil is home to a large biodiversity of elasmobranchs from the Brazilian coast. Several genera and species of small sharks of the Triakidae family live in this marine environment.
Walter Nisa-Castro-Neto   +6 more
doaj   +2 more sources

Complete mitochondrial genome of the gray reef shark, Carcharhinus amblyrhynchos (Carcharhiniformes: Carcharhinidae) [PDF]

open access: yesMitochondrial 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

Three-dimensional fossils of a Cretaceous collared carpet shark (Parascylliidae, Orectolobiformes) shed light on skeletal evolution in galeomorphs [PDF]

open access: yesRoyal Society Open Science
A rich fossil record of teeth shows that many living shark families’ origins lie deep in the Mesozoic. Skeletal fossils of the sharks to whom these teeth belonged are far rarer and when they are preserved are often flattened, hindering understanding of ...
Richard P. Dearden   +7 more
doaj   +2 more sources

Reproductive biology and diet of the grey sharpnose shark Rhizoprionodon oligolinx Springer, 1964 (Chondrichthyes: Carcharhinidae) from the north-eastern Arabian Sea [PDF]

open access: yesJournal of Fish Biology, 2017
Information on reproductive biology is presented for the grey sharpnose shark Rhizoprionodon oligolinx Springer, 1964 (Chondrichthyes: Carcharhiniformes), collected off the north-west coast of India in the Arabian Sea. A total of 711 individuals, of 27.0
Akhilesh, K V   +8 more
core   +3 more sources

Habitat Availability, Jurassic and Cretaceous Origins of the Deep-Bodied Shark Morphotype and the Rise of Pelagic Sharks. [PDF]

open access: yesEcol Evol
We find support for a benthic origin of sharks, with four discrete transitions towards pelagic‐type morphology occurring during the Jurassic and Cretaceous. Increased habitat availability driven by biotic and abiotic environmental change may have driven shifts towards pelagic‐type morphology. These results may help explain discordance between molecular
Gayford JH   +5 more
europepmc   +2 more sources

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

open access: yesEcol Evol
Chromatic disorders like piebaldism—a rare form of leucism causing partial pigment loss—have been documented in 25 wild shark cases across 17 species and 11 families, with varying anatomical distribution. This study compiles published and unpublished records to better understand the taxonomic and geographical spread of piebaldism and its potential ...
Whitehead DA   +9 more
europepmc   +2 more sources

New distributional and morphological data of two species of catsharks, genus Scyliorhinus Blainville, 1816 (Carcharhiniformes, Scyliorhinidae), from the western South Atlantic [PDF]

open access: yesCheck List, 2020
This study provides new distributional and morphological information for two recently described species of catsharks (Carcharhiniformes, Scyliorhinidae) from Brazil.
Stephani M. Lopes   +3 more
doaj   +3 more sources

The biology and ecology of the Pacific sharpnose shark Rhizoprionodon longurio

open access: yesEcology and Evolution, 2023
Amidst global declines in elasmobranch populations resulting predominantly from overfishing, the need to gather data regarding shark ecology is greater than ever.
Joel H. Gayford, Darren A. Whitehead
doaj   +1 more source

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