Results 1 to 10 of about 316 (140)

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

open access: yesEcology 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   +9 more
doaj   +3 more sources

The complete mitochondrial genome and phylogenetic analysis of the reticulated swellshark: Cephaloscyllium fasciatum Chan, 1966 [PDF]

open access: yesMitochondrial DNA. Part B. Resources, 2022
In the present study, the complete mitogenome of Cephaloscyllium fasciatum has been sequenced and assembled. The complete mitochondrial genome is 16,509 bp in length and contains 37 mitochondrial genes and a control region as other fishes. The nucleotide
Yan Liu   +5 more
doaj   +2 more sources

Reproductive Anatomy of Chondrichthyans: Notes on Specimen Handling and Sperm Extraction. II. Sharks and Chimaeras [PDF]

open access: yesAnimals, 2021
The chondrichthyan fishes, which comprise sharks, rays, and chimaeras, are one of the most threatened groups of vertebrates on the planet. Given this situation, an additional strategy for the protection of these species could be the ex situ conservation ...
Pablo García-Salinas   +2 more
doaj   +2 more sources

The neglected diversity: Description and molecular characterisation of Trypanosoma haploblephari Yeld and Smit, 2006 from endemic catsharks (Scyliorhinidae) in South Africa, the first trypanosome sequence data from sharks globally [PDF]

open access: yesInternational Journal for Parasitology: Parasites and Wildlife, 2021
With over 200 species of sharks reported from South African waters, the potential of discovering new blood parasites is very high. Unfortunately, this remains a poorly explored area of research, particularly in this biogeographical region.
Chantelle Pretorius   +3 more
doaj   +2 more sources

The complete mitochondrial genome and phylogenetic position of the leopard catshark, Poroderma pantherinum [PDF]

open access: yesMitochondrial DNA. Part B. Resources, 2018
We present the first mitochondrial genome of a South African endemic catshark, Poroderma pantherinum. The complete mitogenome is 16,686 bp in length, comprising 13 protein-coding genes, 2 rRNA genes, 22 tRNA genes, and one non-coding control region ...
Michaela van Staden   +3 more
doaj   +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

A tale of two seas: contrasting patterns of population structure in the small-spotted catshark across Europe [PDF]

open access: yesRoyal Society Open Science, 2014
Elasmobranchs represent important components of marine ecosystems, but they can be vulnerable to overexploitation. This has driven investigations into the population genetic structure of large-bodied pelagic sharks, but relatively little is known of ...
Chrysoula Gubili   +14 more
doaj   +1 more source

Comparative Study of Semen Parameters and Hormone Profile in Small-Spotted Catshark (Scyliorhinus canicula): Aquarium-Housed vs. Wild-Captured

open access: yesAnimals, 2021
Several chondrichthyan species are threatened, and we must increase our knowledge of their reproductive biology in order to establish assisted reproductive protocols for ex situ or in situ endangered species.
Marta Muñoz-Baquero   +7 more
doaj   +1 more source

Corrigenda: Phylogenetic relationship of catshark species of the genus Scyliorhinus (Chondrichthyes, Carcharhiniformes, Scyliorhinidae) based on comparative morphology. Zoosystematics and Evolution 96(2): 345–395. https://doi.org/10.3897/zse.96.52420 [PDF]

open access: yesZoosystematics and Evolution, 2020
The genus Scyliorhinus is part of the family Scyliorhinidae, the most diverse family of sharks and of the subfamily Scyliorhininae along with Cephaloscyllium and Poroderma.
Karla D. A. Soares   +1 more
doaj   +3 more sources

Phylogenetic relationship of catshark species of the genus Scyliorhinus (Chondrichthyes, Carcharhiniformes, Scyliorhinidae) based on comparative morphology [PDF]

open access: yesZoosystematics and Evolution, 2020
The genus Scyliorhinus is part of the family Scyliorhinidae, the most diverse family of sharks and of the subfamily Scyliorhininae along with Cephaloscyllium and Poroderma.
Karla D. A. Soares   +1 more
doaj   +3 more sources

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