Results 1 to 10 of about 5,320 (221)

Reconstruction of feeding behaviour and diet in Devonian ctenacanth chondrichthyans using dental microwear texture and finite element analyses [PDF]

open access: yesRoyal Society Open Science
Devonian ctenacanth chondrichthyans reached body sizes similar to modern great white sharks and therefore might have been apex predators of the Devonian seas.
Merle Greif   +2 more
exaly   +4 more sources

An Annotated Checklist and the Conservation Status of Chondrichthyans in the Adriatic

open access: yesFishes, 2022
Although there is a high number of publications listing fish species in the Adriatic, only a few have focused on chondrichthyans, while their conservation status has been investigated even less.
Alen Soldo
exaly   +3 more sources

Assessment of the conservation status of Chondrichthyans: underestimation of the pollution threat

open access: yesThe European Zoological Journal, 2021
Cartilaginous fish include sharks, rays, skates, sawfish, and chimaeras. Their habitat ranges from shallow coastal waters to deep ocean floors, estuarine areas as well as rivers and inland waters.
Guia Consales, Letizia Marsili
exaly   +2 more sources

Characterization of the tyrosine-hydroxylase immunoreactive components of the basal subpallium in sharks—toward an identification of a basal subpallial complex [PDF]

open access: yesFrontiers in Neuroanatomy
Comparative studies on the forebrain across different model organisms are necessary to investigate the origin and degree of evolutionary conservation of this brain region and its derivatives. The catshark Scyliorhinus canicula has become a reliable model
Isabel Rodríguez-Moldes   +4 more
doaj   +2 more sources

The holocephalan ratfish endoskeleton shares trabecular and areolar mineralization patterns, but not tesserae, with elasmobranchs little skate and catshark [PDF]

open access: yeseLife
Specific character traits of mineralized endoskeletal tissues need to be clearly defined and comprehensively examined among extant chondrichthyans (elasmobranchs, such as sharks and skates, and holocephalans, such as chimaeras) to understand their ...
Oghenevwogaga Joseph Atake   +3 more
doaj   +2 more sources

A New Paleozoic Symmoriiformes (Chondrichthyes) from the Late Carboniferous of Kansas (USA) and Cladistic Analysis of Early Chondrichthyans

open access: yesPLoS ONE, 2011
BackgroundThe relationships of cartilaginous fishes are discussed in the light of well preserved three-dimensional Paleozoic specimens. There is no consensus to date on the interrelationship of Paleozoic chondrichthyans, although three main phylogenetic ...
Alan Pradel   +2 more
exaly   +3 more sources

A New Research Tool for Use in Sharks and Rays: Relevance of Reproductive Hormone Levels in the Skin of Small-Spotted Catshark (Scyliorhinus canicula) [PDF]

open access: yesAnimals
The present study marks a significant step forward in validating the use of skin biopsies for measuring reproductive steroid hormones in sharks. Given the conservation concerns surrounding many chondrichthyan species and the growing emphasis on adhering ...
Annaïs Carbajal   +5 more
doaj   +2 more sources

The adaptability of facultative parthenogenesis and ‘multiple embryos per eggcase’ as alternative reproductive strategies in Chondrichthyes [PDF]

open access: yesRoyal Society Open Science
Chondrichthyans (sharks, rays and chimaera) are a fascinating case study through which to examine reproductive biology. While most vertebrate lineages have converged upon either placental viviparity or oviparity, chondrichthyans exhibit unparalleled ...
Joel Harrison Gayford
doaj   +2 more sources

Assessing the overlap between fishing and chondrichthyans exposes high‐risk areas for bycatch of threatened species

open access: yesEcosphere
Chondrichthyans (sharks, rays, skates, and chimaeras) make up one of the oldest and most ecologically diverse vertebrate groups, yet they face severe threats from fishing, necessitating improved management strategies. To effectively manage these species,
Chiara Manfredi   +2 more
exaly   +2 more sources

Late Viséan pelagic chondrichthyans from northern Europe [PDF]

open access: yesActa Palaeontologica Polonica, 2015
The relatively rich assemblages of shark teeth from pelagic limestone (Mississippian, late Viséan, late Asbian–middle Brigantian) of three northern European regions: the Rhenish Mountains (Westenfeld Quarry, Germany), the Holy Cross Mountains (Todowa ...
Michał Ginter   +3 more
doaj   +5 more sources

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