نتایج جستجو برای: bycatch
تعداد نتایج: 1054 فیلتر نتایج به سال:
Serum samples from 101 stranded or bycatch cetaceans from British waters were screened for Toxoplasma gondii-specific antibodies using the Sabin Feldman Dye Test. Relatively high seropositivity was recorded in short-beaked Delphinus delphis and this study presents the first documented case of Toxoplasma in a humpback whale Megaptera novaeangliae.
This paper presents a methodology for indirectly estimating the scale of seabird bycatch using existing data. The study focuses on five key species ducks that winter in Polish waters Baltic Sea and are highly susceptible to bycatch: Long-tailed Duck, Velvet Scoter, Common Greater Scaup, Tufted Duck. evaluation units used divided into Bornholm (BS) Gotland Subdivisions (GS) within Exclusive Econ...
Correct species identification is a crucial issue in systematics with key implications for prioritising conservation effort. However, it can be particularly challenging in recently diverged species due to their strong similarity and relatedness. In such cases, species identification requires multiple and integrative approaches. In this study we used multiple criteria, namely plumage colouration...
In the Dutch Caribbean EEZ, at least 27 elasmobranch species have been documented. Of these, nine are listed as “critically endangered” and eight as “near threatened” by the IUCN. Elasmobranchs are not a target fishery in the Dutch Caribbean, but do occur as bycatch in artisanal fisheries. Sharks are considered nuisance species by fishermen. Most sharks caught are not discarded, but consumed lo...
Fisheries bycatch is the greatest current source of human-caused deaths marine mammals worldwide, with severe impacts on health and viability many populations. Recent regulations enacted in United States under Fish Product Import Provisions its Marine Mammal Protection Act require nations fisheries exporting fish products to (hereafter, “export fisheries”) have or establish mammal protection st...
The small population paradigm assumes that populations with low numbers of individuals intrinsically have a high probability extinction. Lahille’s bottlenose dolphins Tursiops truncatus gephyreus specializes in foraging artisanal fishers Laguna, southern Brazil, faces human pressures including bycatch fishing gear. viability this was modelled over 30 and 100 years under different levels bycatch...
Abstract Between October 2018 and 2019, seven megamouth sharks were reported as bycatch in the small-scale surface midwater gillnet fisheries operating from ports of Mancora Salaverry northern Peru. Here we present details these specimens events that represent first documented records this species Peruvian waters, confirming their occurrence bycatch. We recommend continued monitoring programs t...
Based on an extensive sampling regime from both nesting populations and bycatch, frequency analyses of mitochondrial (mt) DNA control region haplotypes in the Mediterranean were used to assess the genetic structure and stock composition of the loggerhead sea turtle, Caretta caretta, in different marine fisheries. The analyses show the following. (i) In drifting longline fisheries working in Med...
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