Extinction risk and conservation of the world's sharks and rays.
Elife
; 3: e00590, 2014.
Article
em En
| MEDLINE
| ID: mdl-24448405
ABSTRACT
The rapid expansion of human activities threatens ocean-wide biodiversity. Numerous marine animal populations have declined, yet it remains unclear whether these trends are symptomatic of a chronic accumulation of global marine extinction risk. We present the first systematic analysis of threat for a globally distributed lineage of 1,041 chondrichthyan fishes-sharks, rays, and chimaeras. We estimate that one-quarter are threatened according to IUCN Red List criteria due to overfishing (targeted and incidental). Large-bodied, shallow-water species are at greatest risk and five out of the seven most threatened families are rays. Overall chondrichthyan extinction risk is substantially higher than for most other vertebrates, and only one-third of species are considered safe. Population depletion has occurred throughout the world's ice-free waters, but is particularly prevalent in the Indo-Pacific Biodiversity Triangle and Mediterranean Sea. Improved management of fisheries and trade is urgently needed to avoid extinctions and promote population recovery. DOI http//dx.doi.org/10.7554/eLife.00590.001.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Tubarões
/
Rajidae
/
Extinção Biológica
Tipo de estudo:
Etiology_studies
/
Risk_factors_studies
Limite:
Animals
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Humans
Idioma:
En
Revista:
Elife
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
Canadá