Results 81 to 90 of about 17,330 (286)

Elasmobranchs small-scale fishery in Guatemala: Socioeconomic aspects and value chain structure

open access: yesSocial Sciences and Humanities Open
Small-scale fishing (SSF) stands as a cornerstone of economic activity along Guatemala's coastlines. Fisheries products, including those derived from elasmobranchs, serve as vital sources of income for fishers and dealers.
María de los Angeles Rosales-Melgar   +5 more
doaj   +1 more source

Exploring fishing threat at fleet segment and subregional scale: Least expert knowledge and a resilience versus disturbance‐based approach as conservation's tools for cartilaginous fish

open access: yesEcology and Evolution, 2023
Based on an explorative but rigorous elicitation framework, we obtained the bycatch fishing probability at the fishing fleet segment level using expert estimates.
Umberto Scacco   +2 more
doaj   +1 more source

European Shark Fisheries: A Preliminary Investigation into Fisheries, Conversion Factors, Trade Products, Markets and Management Measures [PDF]

open access: yes, 2007
Recommends new regulations to prevent shark finning -- an illegal practice in which a shark's fins are removed and its carcass dumped at sea -- and stresses the urgent need for effective shark conservation ...
Bernard Seret   +11 more
core  

Insights into the structure of grey reef shark aggregation, Carcharhinus amblyrhynchos (Bleeker, 1856), in two distinct channels of the Maldivian archipelago, Indian Ocean

open access: yesJournal of Fish Biology, EarlyView.
Abstract The grey reef shark Carcharhinus amblyrhynchos is one of the most frequently encountered reef‐associated shark species in the Maldives, yet very little is known about its local size structure or population dynamics. This study provides new insights into two aggregations of C.
Andrea Parmegiani   +7 more
wiley   +1 more source

Artisanal elasmobranch fisheries of northwestern Baja California, Mexico

open access: yesCiencias Marinas, 2020
Elasmobranch species composition and spatiotemporal variability can often be characterized from landing surveys of local fisheries, with important management implications. In the present study, we describe the elasmobranch landing composition of 4 major
Omar Santana-Morales   +5 more
doaj   +1 more source

Age validation, growth, mortality, and demographic modeling of spotted gully shark (Triakis megalopterus) from the southeast coast of South Africa [PDF]

open access: yes, 2011
This study documents validation of vertebral band-pair formation in spotted gully shark (Triakis megalopterus) with the use of fluorochrome injection and tagging of captive and wild sharks over a 21-year period.
Booth, Anthony J.   +2 more
core   +1 more source

Pigmentation disorders in three specimens of spiny dogfish, Squalus acanthias Linnaeus, 1758, from the Gulf of Venice, northern Adriatic Sea

open access: yesJournal of Fish Biology, EarlyView.
Abstract This study reports three cases of pigmentation disorders in Squalus acanthias from the Gulf of Venice. Two specimens exhibited spotless phenotypes, whereas one exhibited hypermelanism. Morphological assessments were conducted for two individuals, alongside genetic analysis of mitochondrial genes to determine phylogeographic relationships. Both
Jacopo Bernardi   +5 more
wiley   +1 more source

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