Results 21 to 30 of about 4,688 (194)

Muscle development in the shark Scyliorhinus canicula: implications for the evolution of the gnathostome head and paired appendage musculature [PDF]

Frontiers in Zoology, 2017
Background The origin of jawed vertebrates was marked by profound reconfigurations of the skeleton and muscles of the head and by the acquisition of two sets of paired appendages.
Janine M. Ziermann, Renata Freitas, Rui Diogo   +2 more
doaj   +2 more sources

Strong population genetic structure and contrasting demographic histories for the small-spotted catshark (Scyliorhinus canicula) in the Mediterranean Sea. [PDF]

Heredity (Edinb), 2015
Coastal and demersal chondrichthyans, such as the small-spotted catshark, are expected to exhibit genetic differentiation in areas of complex geomorphology like the Mediterranean Basin because of their limited dispersal ability.
Kousteni V, Kasapidis P, Kotoulas G, Megalofonou P.   +3 more
europepmc   +3 more sources

In vivo staining with alizarin for ageing studies on chondrichthyan fishes

Aquatic Living Resources, 2020
Age determination for stock assessments and conservation of cartilaginous fishes is mainly obtained by counting the annual growth bands in vertebrae. Recent studies show numerous inconsistencies and the need for systematic validation.
Caraguel Jean-Marie, Barreau Thomas, Brown-Vuillemin Sarah, Iglésias Samuel P.   +3 more
doaj   +3 more sources

Proteomic analysis of the zone of degeneration at the mitosis-meiosis transition stage in wild-caught male catshark (Scyliorhinus canicula), correlated with an unusually high-water temperature in the English Channel. [PDF]

J Fish Biol
Abstract In the context of current global change, variations in water temperature are one of the environmental conditions with serious consequences for marine life, including reproductive processes. In the small spotted catshark Scyliorhinus canicula, spermatogenesis occurs in spermatocysts composed of synchronously developing germ cells associated ...
Jeanne F, Pilet S, Heighton S, Bernay B, Sourdaine P.   +4 more
europepmc   +2 more sources

Trophic Partitioning among Three Mesopredatory Shark Species Inhabiting the Northwestern Adriatic Sea

Diversity, 2023
While the general diet of Mediterranean elasmobranchs has been widely studied, little is known about food partitioning and competition among sympatric species, despite these being important forces structuring marine communities. Using stomach content and
Licia Finotto, Daniela Berto, Federico Rampazzo, Saša Raicevich, Sara Bonanomi, Carlotta Mazzoldi   +5 more
doaj   +1 more source

Developmental genoarchitectonics as a key tool to interpret the mature anatomy of the chondrichthyan hypothalamus according to the prosomeric model

Frontiers in Neuroanatomy, 2022
The hypothalamus is a key vertebrate brain region involved in survival and physiological functions. Understanding hypothalamic organization and evolution is important to deciphering many aspects of vertebrate biology.
Gabriel N. Santos-Durán, Susana Ferreiro-Galve, Sylvie Mazan, Ramón Anadón, Isabel Rodríguez-Moldes, Eva Candal   +5 more
doaj   +1 more source

Determination of Maturity and reproductive cycle of Small Spotted Catshark Scyliorhinus canicula (Linnaeus, 1758)(Scyliorhinidae: Elasmobranchii) From the Syrian marine water

المجلة العراقية للاستزراع المائي, 2022
This study was carried out in the Marine Sciences Laboratory of Agriculture Faculty at Tishreen University, in collaboration with the Higher Commission for Scientific Research, on the Small Spotted Catshark Scyliorhinus canicula (Linnaeus, 1758) in the ...
Malek Fares Ali, Adib Saad Saad, Haitham Kurbaj Kurbaj, Shadi Jneidi Jneidi   +3 more
doaj   +1 more source

Key drivers of at-vessel mortality in demersal sharks. [PDF]

Conserv Biol
Abstract Chondrichthyans are highly vulnerable to fisheries overexploitation, and postcapture mortality poses a significant threat to most species. Global bycatch mitigation guidelines recommend adopting hierarchical decision‐making approaches tailored to species‐specific vulnerabilities and socioeconomic and regulatory contexts.
Ruiz-García D, Barría C, Raga JA, March D.   +3 more
europepmc   +2 more sources

A molecular and ecological study of Grillotia (Cestoda: Trypanorhyncha) larval infection in small to mid‐sized benthonic sharks in the Gulf of Naples, Mediterranean Sea

Ecology and Evolution, 2021
Aim Trypanorhyncha cestodes comprise a wide range of heteroxenous parasites infecting elasmobranchs as definitive hosts. Limited data exist on the larval infection of these cestodes and the role of intermediate and paratenic hosts in the life cycle of ...
Mario Santoro, Bruno Bellisario, Fabio Crocetta, Barbara Degli Uberti, Marialetizia Palomba   +4 more
doaj   +1 more source

Feeding ecology of demersal elasmobranchs from the shelf and slope off the Balearic Sea (western Mediterranean)

Scientia Marina, 2011
The feeding ecology of eight demersal elasmobranchs, three sharks (Etmopterus spinax, Scyliorhinus canicula and Galeus melastomus) and five batoids (Myliobatis aquila, Leucoraja naevus, Raja polystigma, R. miraletus and R. clavata), from the Balearic Sea
Maria Valls, Antoni Quetglas, Francesc Ordines, Joan Moranta   +3 more
doaj   +1 more source