Results 21 to 30 of about 14,511 (238)
Sharks and their relatives: can their past help predict their future?
Frontiers in Marine Science, 2023 Elasmobranchs (i.e., sharks, skates, and rays) have survived five mass extinction events and changed relatively little throughout their ~450-million-year evolutionary history. Therefore, elasmobranchs may provide critical evolutionary perspectives on how
Aaron Hasenei +3 more
doaj +1 more source
Dental microwear texture analysis as a tool for dietary discrimination in elasmobranchs
Scientific Reports, 2021 As abundant and widespread predators, elasmobranchs play influential roles in food-web dynamics of marine communities. Clearly, these trophic interactions have significant implications for fisheries management and marine conservation, yet elasmobranch ...
Laura J. McLennan, Mark A. Purnell
doaj +1 more source
Quantitative assessment of inner ear variation in elasmobranchs
Scientific Reports, 2023 Considerable diversity has been documented in most sensory systems of elasmobranchs (sharks, rays, and skates); however, relatively little is known about morphological variation in the auditory system of these fishes.
Derek J. Sauer +3 more
doaj +1 more source
Journal of Asia-Pacific Biodiversity, 2019 Elasmobranchs are experiencing population declines worldwide because of anthropogenic stressors. Marine protected areas (MPAs) have been shown to benefit mesopredatory species of shark.
Ryan Murray +7 more
doaj +1 more source
Distribution of skates and sharks in the North Sea: 112 years of change [PDF]
, 2016 How have North Sea skate and shark assemblages changed since the early 20th century when bottom trawling became widespread, whilst their environment became increasingly impacted by fishing, climate change, habitat degradation and other anthropogenic ...
Ellis, JR +4 more
core +1 more source
Frontiers in Marine Science, 2023 The present study, based on microsatellite markers, describes a population genetic analysis of the small-spotted catshark Scyliorhinus canicula (Linnaeus, 1758), representing one of the most abundant and commonly caught cartilaginous fishes in the ...
Riccardo Melis +14 more
doaj +1 more source
Multiple paternity and hybridization in two smooth-hound sharks [PDF]
, 2015 Multiple paternity appears to be a common trait of elasmobranch mating systems, with its occurrence likely driven by convenience, due to females seeking to minimize the stress of male harassment.
Gristina, Michele +5 more
core +1 more source
Osmoregulation in Elasmobranchs [PDF]
American Zoologist, 1977 Osmoregulatory mechanisms were examined in major groups of fishes including hagfish, holocephalans, elasmobranchs, the coelacanth, and ray-fin fishes. Four main patterns of body fluid composition emerged. These represent the three main osmoregulatory processes in the marine environment and the one in fresh water.
PETER K. T. PANG +2 more
openaire +1 more source
Animals, 2021 The age and growth rate of the giant electric ray, Narcine entemedor, was estimated using growth bands deposited in the vertebral centra of 245 specimens.
Pablo Mora-Zamacona +6 more
doaj +1 more source
El sistema reproductor femenino de Zearaja chilensis (Guichenot, 1848) (Chondrichthyes, Rajidae): Gametogénesis y validación microscópica de los criterios de madurez [PDF]
, 2015 Los condrictios son extremadamente susceptibles a la explotación pesquera debido, entre otras cosas, a sus adaptaciones reproductivas. Los conocimientos básicos de sus parámetros reproductivos son esenciales, ya sea desde el punto de vista ecológico como
Di Giacomo, Edgardo Ernesto +2 more
core +1 more source