Results 31 to 40 of about 3,749 (188)

Simulated heatwave and fishing stressors alter corticosteroid and energy balance in neonate blacktip reef sharks, Carcharhinus melanopterus.

open access: yesConservation Physiology, 2021
Lay Summary In tropical nearshore habitats, thermal stressors may exacerbate existing stressors in sharks. Here, we investigated the mobilization of plasma corticosteroids and metabolites in response to a heatwave stress and air exposure in the blacktip ...
A. Schoen   +6 more
semanticscholar   +4 more sources

Steroid hormones as a non-lethal assessment of the reproductive biology in male and female blacktip reef sharks

open access: yesFrontiers in Fish Science
Overexploitation of sharks and the destruction of their habitat has led to severe population declines and the need for conservation and management actions.
J. Mourier   +2 more
semanticscholar   +3 more sources

Defining ecological roles of sharks on coral reefs. [PDF]

open access: yesBiol Rev Camb Philos Soc
ABSTRACT Sharks have often been perceived to play a critical role in the dynamics of coral reef ecosystems globally. Yet, there is relatively little evidence to support this idea across all but a limited set of species and contexts. Research on the roles and importance of reef sharks has been complicated by logistical challenges in collecting data on ...
Klinard NV   +3 more
europepmc   +2 more sources

Trouble in the Tank: A Case Report of Fatal Scuticociliate Encephalitis in a Whitetip Reef Shark (Triaenodon obesus). [PDF]

open access: yesJ Fish Dis
Abstract This case report presents a recent case of scuticociliatosis in a whitetip reef shark (Triaenodon obesus), housed at a zoo (Haus des Meeres Aqua Terra Zoo, Vienna, Austria). Clinical signs such as uncoordinated swimming and body tilt were observed prior to death.
Schwegler H   +5 more
europepmc   +2 more sources

Surface morphology and distribution of oropharyngeal taste papillae in sharks and rays (Elasmobranchii, Chondrichthyes): Implications for gustatory sensitivity. [PDF]

open access: yesJ Anat
This study investigates the morphology, abundance, and distribution of taste papillae in the oropharyngeal cavity of a range of elasmobranchs using SEM, histology, and topographic analyses. The interspecific importance of gustation is reflected in quantitative differences in the size, density, and distribution of taste papillae, which have implications
Atkinson CJL, Collin SP.
europepmc   +2 more sources

Olfaction Contributes to Pelagic Navigation in a Coastal Shark. [PDF]

open access: yes, 2016
How animals navigate the constantly moving and visually uniform pelagic realm, often along straight paths between distant sites, is an enduring mystery. The mechanisms enabling pelagic navigation in cartilaginous fishes are particularly understudied.
Chai, Fei   +4 more
core   +15 more sources

Long-term changes in species composition and relative abundances of sharks at a provisioning site. [PDF]

open access: yesPLoS ONE, 2014
Diving with sharks, often in combination with food baiting/provisioning, has become an important product of today's recreational dive industry. Whereas the effects baiting/provisioning has on the behaviour and abundance of individual shark species are ...
Juerg M Brunnschweiler   +2 more
doaj   +1 more source

Shark Provisioning Influences the Gut Microbiota of the Black-Tip Reef Shark in French Polynesia

open access: yesFishes, 2022
There is an increasing interest in touristic observations of top predators in the wild. Sharks are probably the most sought-after animal in marine ecosystems by divers.
Anaïs Esposito   +4 more
doaj   +1 more source

The shark assemblage at French Frigate Shoals atoll, Hawai'i: species composition, abundance and habitat use. [PDF]

open access: yesPLoS ONE, 2011
Empirical data on the abundance and habitat preferences of coral reef top predators are needed to evaluate their ecological impacts and guide management decisions.
Jonathan J Dale   +3 more
doaj   +1 more source

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