Results 21 to 30 of about 10,818 (235)

Tubbataha Reefs Natural Park: the first comprehensive elasmobranch assessment reveals global hotspot for reef sharks

open access: yesJournal 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

Commercial sharks under scrutiny: Baseline genetic distinctiveness supports structured populations of small-spotted catsharks in the Mediterranean Sea

open access: yesFrontiers 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

Growth Modeling of the Giant Electric Ray Narcine entemedor in the Southern Gulf of California: Analyzing the Uncertainty of Three Data Sets

open access: yesAnimals, 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

Optimal soak times for Baited Remote Underwater Video Station surveys of reef-associated elasmobranchs

open access: yesPLoS ONE, 2020
Effective sampling of marine communities is essential to provide robust estimates of species richness and abundance. Baited Remote Underwater Video Stations (BRUVS) are a useful tool in assessment of fish assemblages, but research on the optimal sampling
Leanne M. Currey-Randall   +4 more
semanticscholar   +1 more source

Evidence of tide pool use by a viviparous elasmobranch as a parturition site [PDF]

open access: yesActa 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

Strengthening Angel Shark Conservation in the Northeastern Mediterranean Sea

open access: yesJournal 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

Marine protected areas for demersal elasmobranchs in highly exploited Mediterranean ecosystems.

open access: yesMarine Environmental Research, 2020
Marine ecosystems are complex socio-ecological systems where sustainable solutions can be best gained by satisfying both conservation and socioeconomic demands.
J. Giménez   +6 more
semanticscholar   +1 more source

A socio‐psychological approach for understanding and managing bycatch in small‐scale fisheries

open access: yesPeople 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

Catch Composition, Seasonality, and Biological Aspects of Sharks Caught in the Ecuadorian Pacific

open access: yesDiversity, 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

Acute Stress in Lesser-Spotted Catshark (Scyliorhinus canicula Linnaeus, 1758) Promotes Amino Acid Catabolism and Osmoregulatory Imbalances

open access: yesAnimals, 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

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