Results 31 to 40 of about 4,709 (218)

Sharks, Rays and a Chimaeroid from the Kimmeridgian (Late Jurassic) of Ringstead, Southern England [PDF]

, 2002
Sampling of a lenticular concentration of vertebrate debris and associated sediments from the lower Kimmeridgian of southern England has allowed the study of a diverse and abundant assemblage of chondrichthyan remains.
Underwood, Charlie J.
core   +1 more source

Mechanisms of endoderm formation in a cartilaginous fish reveal ancestral and homoplastic traits in jawed vertebrates

Biology Open, 2014
In order to gain insight into the impact of yolk increase on endoderm development, we have analyzed the mechanisms of endoderm formation in the catshark S. canicula, a species exhibiting telolecithal eggs and a distinct yolk sac.
Benoit G. Godard, Marion Coolen, Sophie Le Panse, Aurélie Gombault, Susana Ferreiro-Galve, Laurent Laguerre, Ronan Lagadec, Patrick Wincker, Julie Poulain, Corinne Da Silva, Shigehiro Kuraku, Wilfrid Carre, Agnès Boutet, Sylvie Mazan   +13 more
doaj   +1 more source

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

Animals, 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, Francisco Marco-Jiménez, Ximo García-Domínguez, José Luis Ros-Santaella, Eliana Pintus, María Jiménez-Movilla, Daniel García-Párraga, Francisco Alberto García-Vazquez   +7 more
doaj   +1 more source

Diversity Patterns of Late Jurassic Chondrichthyans: New Insights from a Historically Collected Hybodontiform Tooth Assemblage from Poland

Diversity, 2022
Here, we provide a detailed taxonomic reassessment of a historically collected chondrichthyan dental assemblage from the lower Kimmeridgian of Czarnogłowy in north-western Poland and discuss its significance for better understanding hybodontiform ...
Sebastian Stumpf, Stefan Meng, Jürgen Kriwet   +2 more
doaj   +1 more source

A shared role for sonic hedgehog signalling in patterning chondrichthyan gill arch appendages and tetrapod limbs. [PDF]

, 2016
Chondrichthyans (sharks, skates, rays and holocephalans) possess paired appendages that project laterally from their gill arches, known as branchial rays.
Gillis, J Andrew, Hall, Brian K
core   +2 more sources

Taking Advantage of the Genomics Revolution for Monitoring and Conservation of Chondrichthyan Populations

Diversity, 2019
Chondrichthyes (sharks, rays, skates and chimaeras) are among the oldest extant predators and are vital to top-down regulation of oceanic ecosystems. They are an ecologically diverse group occupying a wide range of habitats and are thus, exploited by ...
Shaili Johri, Michael P. Doane, Lauren Allen, Elizabeth A. Dinsdale   +3 more
doaj   +1 more source

Barremian and Aptian (Cretaceous) sharks and rays from Speeton, Yorkshire, north-east England [PDF]

, 2004
Bulk sampling of a number of horizons within the upper part of the Speeton Clay Type section has produced teeth and other remains of sharks and rays from several poorly studied horizons.
Applegate, Ayres, Batchelor, Berg, Biddle, Biddle, Bonaparte, C. J. Underwood, Cappetta, Cappetta, Cappetta, Cappetta, Casier, Compagno, de Blainvile, Duffin, Gill, Glickman, Herman, Herman, Kriwet, Müller, Pictet, Regan, Schmitz, Siverson, Siverson, Stinton, Thies, Thies, Thiolliere, Underwood, Underwood, Ward, Woodward   +34 more
core   +1 more source

Blood collection under anesthesia, peripheral blood cells, plasma biochemistry, and plasma protein electrophoresis in a living fossil: the Spotted Ratfish (Hydrolagus colliei)

Frontiers in Veterinary Science
This report describes the safe and effective handling under anesthesia, blood collection and main clinical pathology values determination for three adult Spotted Ratfish (Hydrolagus colliei) (two males and one female) successfully maintained under human ...
Pablo Morón-Elorza, Pablo Morón-Elorza, Hugo David, Hugo Batista, Vanessa Quina, Nuria Baylina, Nuno Pereira   +6 more
doaj   +1 more source

Habitat Use Throughout a Chondrichthyan's Life [PDF]

, 2021
<p>Over the last few decades, much effort has been devoted towards evaluating and reducing bycatch in marine fisheries. There has been a particular focus on quantifying the risk to chondrichthyans, primarily because of their relatively high vulnerability to overfishing. A key part of risk assessment is evaluating the distributional overlap of the
openaire   +1 more source

The musculature and skeleton of the pelvic fin of the crocodile shark, Pseudocarcharias kamoharai (Matsubara, 1936) (Elasmobranchii: Lamniformes): Morphology and sexual dimorphism

The Anatomical Record, EarlyView.
This work brings new information on the sexual characteristics of the crocodile shark (Pseudocarcharias kamoharai) exploring the pelvic fin musculature, as well as the siphon sac and the musculature and skeleton of the clasper. Our paper is the first to point out clearly the sexual dimorphism related exclusively to the pelvic fin musculature in males ...
Laura F. Mianutti, Kenshu Shimada, João Paulo C. B. da Silva   +2 more
wiley   +1 more source