31 documents found, page 1 of 4

Spatial and temporal size distribution of swordfish in the Atlantic Ocean: impl...

Swordfish (Xiphias gladius) is a common target species of surface pelagic longline fisheries. In the Atlantic Ocean and Mediterranean Sea, swordfish is managed as three separate stocks, all having management measures in place to rebuild or conserve the stocks, including minimum landing sizes. The objective of this study was to review size data for swordfish in the Atlantic Ocean, model the sex-specific size dis...

Management strategy evaluation operating model conditioning: a swordfish case s...

Evaluation of fish stock status is a key step for fisheries management. Tuna Regional Fisheries Management Organizations (t-RFMOs) are moving towards management strategy evaluation (MSE), a process that combines science and policy and depends on technical aspects, developed by scientists, designed to meet management objectives established by managers and other stakeholders. In the Indian Ocean, the current mana...

Leader material and bait effects on target and bycatch species caught in an Atl...

The influence of bait type and leader material on target and bycatch species was assessed through fishing experiments in the Portuguese shallow pelagic longline fishery in the Atlantic Ocean. Wire leaders were found to decrease catch rates of commercially valuable species such as bigeye tuna and yellowfin tuna, while increasing catch rates of elasmobranchs, including the blue shark and shortfin mako. The odds r...

Seascape genomics and phylogeography of the sailfish (Istiophorus platypterus)

Permeable phylogeographic barriers characterize the vast open ocean, boosting gene flow and counteracting population differentiation and speciation of widely distributed and migratory species. However, many widely distributed species consists of distinct populations throughout their distribution, evidencing that our understanding of how the marine environment triggers population and species divergence are insuf...

A review of reported effects of pelagic longline fishing gear configurations on...

1. A meta-analysis of 40 publications totalling 59 experiments was undertaken to review and assess the effects of changing the hook (circle vs. J-hooks or tuna hooks), bait (fish vs. squid) and leader (wire vs. nylon) type on retention and at haulback mortality rates of teleosts (tunas and billfishes), elasmobranchs and sea turtles caught on shallow-set and deep-set pelagic longline fisheries. 2. Circle hooks a...

ESTADO DOS STOCKS EM 2020 E ACONSELHAMENTO CIENTÍFICO PARA A SUA GESTÃO EM 2021

This report presents the stock assessment results for the species exploited by Portugal in 2020 and the scientific advice for their management in 2021. For each resource the stock distribution area, the source for the scientific advice, the biological reference points, the state of exploitation and scientific advice and the management measures.; O presente relatório apresenta os resultados das avaliações do est...

Concentraçao do mercado de telefonia movel no Brasil

Orientador: Walter Tadahiro Shima; Monografia(Graduaçao) - Universidade Federal do Paraná,Setor de Ciencias Sociais Aplicadas, Curso de Ciencias Econômicas; Resumo: O estudo tem como pressuposto as evoluções ocorridas no setor de telecomunicação nos últimos anos, aquelas que ocasionaram reestruturações normativas e empresariais. O crescimento do setor de telefonia celular deve-se às novas oportunidades de negóc...

Consulta de enfermagem de saúde infantil aos 6 meses: um estudo de caso

Genetic diversity and population structure of Cynara cardunculus L. in southern...

Cynara cardunculus L. is a cardoon species native to the Mediterranean region, which is composed of three botanical taxa, each having distinct biological characteristics. The aim of this study was to examine wild populations of C. cardunculus established in Portugal, in order to determine their genetic diversity, geographic distribution, and population structure. Based on SSR markers, 121 individuals of C. card...

Genetic diversity and population structure of Cynara cardunculus L. in southern...

Cynara cardunculus L. is a cardoon species native to the Mediterranean region, which is composed of three botanical taxa, each having distinct biological characteristics. The aim of this study was to examine wild populations of C. cardunculus established in Portugal, in order to determine their genetic diversity, geographic distribution, and population structure. Based on SSR markers, 121 individuals of C. card...