Results 21 to 30 of about 17,250 (288)
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
Age and growth of Zapteryx brevirostris (Elasmobranchii: Rhinobatidae) in southern Brazil [PDF]
, 2018 Age and growth studies are fundamental to successful fisheries management. Zapteryx brevirostris (Muller & Henle, 1841) is distributed off the Brazilian continental shelf and this species is assessed as "Vulnerable" in the Red List of the International ...
Carmo, Wanessa P. D. +2 more
core +4 more sources
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
Strengthening Angel Shark Conservation in the Northeastern Mediterranean Sea
Journal of Marine Science and Engineering, 2022 Angel sharks are among the most threatened species of sharks globally. Twenty-two species have been identified globally so far, with three species being present in the Mediterranean Sea: Squatina aculeata, Squatina oculata, and Squatina squatina.
Ioannis Giovos +16 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
Evidence of tide pool use by a viviparous elasmobranch as a parturition site [PDF]
Acta Ichthyologica et Piscatoria, 2019 Despite the frequent occurrence of elasmobranchs in surf zones, the use of tidal pools by these animals is unknown, with only one incidental observation reported in the literature.
N. Wosnick +3 more
doaj +3 more sources
Catch Composition, Seasonality, and Biological Aspects of Sharks Caught in the Ecuadorian Pacific
Diversity, 2022 Although sharks have a fundamental role in maintaining the balance of aquatic ecosystems, exerting a great influence on lower levels of the food chain, their populations are declining worldwide due, to a large extent, to overfishing.
Jesús Briones-Mendoza +2 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
A socio‐psychological approach for understanding and managing bycatch in small‐scale fisheries
People and Nature, 2023 Fisheries bycatch is the greatest threat to migratory, long‐lived marine animals. Addressing bycatch ultimately requires changing fisher behaviour, yet social and behavioural sciences are rarely applied to bycatch mitigation, with an absence of theory ...
Hollie Booth +6 more
doaj +1 more source
Animals, 2022 Acute-stress situations in vertebrates induce a series of physiological responses to cope with the event. While common secondary stress responses include increased catabolism and osmoregulatory imbalances, specific processes depend on the taxa.
Ignacio Ruiz-Jarabo +5 more
doaj +1 more source