Results 11 to 20 of about 410 (131)

Trophic Ecology during the Ontogenetic Development of the Pelagic Thresher Shark Alopias pelagicus in Baja California Sur, Mexico

Diversity, 2023
The trophic ecology of the Pelagic Thresher shark (Alopias pelagicus) was evaluated based on chemical ecology using stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) in the vertebrae and muscles.
Clara Sánchez-Latorre, Felipe Galván-Magaña, Fernando R. Elorriaga-Verplancken, Arturo Tripp-Valdez, Rogelio González-Armas, Alejandra Piñón-Gimate, Antonio Delgado-Huertas   +6 more
doaj   +4 more sources

The denticle surface of thresher shark tails: Three‐dimensional structure and comparison to other pelagic species

Journal of Morphology, 2020
AbstractShark skin denticles (scales) are diverse in morphology both among species and across the body of single individuals, although the function of this diversity is poorly understood. The extremely elongate and highly flexible tail of thresher sharks provides an opportunity to characterize gradients in denticle surface characteristics along the ...
Meagan Popp, Connor F White, Diego Bernal   +2 more
exaly   +4 more sources

Habitat use and diel vertical migration of bigeye thresher shark: Overlap with pelagic longline fishing gear [PDF]

Marine Environmental Research, 2015
Pelagic longliners targeting swordfish and tunas in oceanic waters regularly capture sharks as bycatch, including currently protected species as the bigeye thresher, Alopias superciliosus. Fifteen bigeye threshers were tagged with pop-up satellite archival tags (PSATs) in 2012-2014 in the tropical northeast Atlantic, with successful transmissions ...
Rui Coelho, Joana Fernandez-Carvalho, MIGUEL N Santos   +2 more
exaly   +4 more sources

Growth estimates of pelagic thresher shark (Alopias pelagicus Nakamura, 1935) in the Indian Ocean Southern Java waters

IOP Conference Series: Earth and Environmental Science, 2021
Abstract Alopias pelagicus were highly migratory species, oceanic and almost always found in tropical and temperate seas. This species was particularly vulnerable to exploitation of both targets and side catches. Research was conducted in May 2015 to November 2016 at the landing site of the Cilacap Fishing Port.

exaly   +2 more sources

Identifying spatial movements and residency of pelagic thresher sharks (Alopias pelagicus) using satellite and passive acoustic telemetry to inform local conservation in central Indonesia

Frontiers in Fish Science
The pelagic thresher shark (Alopias pelagicus) is globally endangered, threatened by bycatch, and targeted in industrial and artisanal fisheries in Indonesia. However, a lack of information about their ecology, particularly movement and habitat use, hinders the development of science-based conservation measures to protect the species.
Joshua D Stewart, Abraham B Sianipar, Edy Setyawan   +2 more
exaly   +2 more sources

Beyond the Meal: Trophic Controls by Pelagic and Demersal Chondrichthyes in Two Different Mediterranean Marine Food Webs. [PDF]

Ecol Evol
Pelagic and demersal sharks played different top‐down controls in the food web. Pelagic sharks act as apex predators impacting mesoconsumers. Trophic controls patterns by demersal sharks change according to ecosystem traits. ABSTRACT Pelagic and demersal Chondrichthyes can assume different patterns of trophic controls on marine food webs, sustaining ...
Ricci P, Finotto L, Barausse A, Zampieri C, Mazzoldi C, Cipriano G, De Luca FP, Carlucci R.   +7 more
europepmc   +2 more sources

Habitat Availability, Jurassic and Cretaceous Origins of the Deep-Bodied Shark Morphotype and the Rise of Pelagic Sharks. [PDF]

Ecol Evol
We find support for a benthic origin of sharks, with four discrete transitions towards pelagic‐type morphology occurring during the Jurassic and Cretaceous. Increased habitat availability driven by biotic and abiotic environmental change may have driven shifts towards pelagic‐type morphology. These results may help explain discordance between molecular
Gayford JH, Jambura PL, Türtscher J, Sternes PC, Seamone SG, Shimada K.   +5 more
europepmc   +2 more sources

Predictions of southern migration timing in coastal sharks under future ocean warming. [PDF]

Conserv Biol
Abstract Projected redistribution of marine species due to ocean warming may undermine current conservation efforts. Yet, there have been few studies on how ocean warming may alter migration timing. Across 5 years of acoustic telemetry data (2018–2022), we determined environmental drivers of southward migration timing for 6 migratory shark species from
Manz MH, Shipley ON, Cerrato RM, Hueter RE, Newton AL, Tyminski JP, Franks BR, Curtis TH, Fischer C, Zacharias JP, Scott C, Dunton KJ, Kneebone J, Peterson BJ, Scannell BJ, Dodd JF, Frisk MG.   +16 more
europepmc   +2 more sources

Resource partitioning among pelagic predators remains stable despite annual variability in diet composition. [PDF]

J Anim Ecol
The authors present a diet dataset from 10 oceanic predators from the California Current Ecosystem. Over the two‐decade study period, predator diets varied but diet overlap among predators remained stable. This work demonstrates that resource use does not need to be consistent for competitors to maintain distinct realized niches. Abstract Diet data are
Portner EJ, Muhling BA, Preti A, Snodgrass OE, Richards TM, Nickels CF, Dewar H, Hazen EL, Choy CA.   +8 more
europepmc   +2 more sources

Oceanic sharks clean at coastal seamount. [PDF]

PLoS ONE, 2011
Interactions between pelagic thresher sharks (Alopias pelagicus) and cleaner wrasse were investigated at a seamount in the Philippines. Cleaning associations between sharks and teleosts are poorly understood, but the observable interactions seen at this ...
Simon P Oliver, Nigel E Hussey, John R Turner, Alison J Beckett   +3 more
doaj   +1 more source