Data/hora: 01/06/2024 02:33:46

Provedor de dados: 	83	
País: 	Brazil	
Título: 	Depletion of trophy large-sized sharks populations of the Argentinean coast, south-western Atlantic: insights from fishers' knowledge	
Autores: 	Irigoyen,Alejo; Trobbiani,Gastón.	
Data: 	2016-01-01	
Ano: 	2016	
Palavras-chave: 	Carcharhinus brachyurus; Carcharias taurus; Conservation status; Folk ecological knowledge; Galeorhinus galeus; Notorynchus cepedianus.	
Resumo: 	Abstract Globally, sharks are impacted by a wide range of human activities, resulting in many populations being depleted. Trophy large-sized sharks of the Argentinean coast, the sand-tiger Carcharias taurus , the copper Carcharhinus brachyurus and the sevengill shark Notorynchus cepedianus are under intense sport and artisanal fishing since the 50's decade. However, the current and historical information for the assessment of its populations status is scarce. The aim of this work was to analyze the status of conservation of these species through the gathering of expert fishermen knowledge (FK) on semi-structured interviews. Abundance variation perception between the beginning and the end of fishermen careers revealed a critical status for the species study (means variation between -77 and -90 %). Furthermore, a best day's catch analysis reinforce this result in the case of the sand tiger shark. The school shark Galeorhinus galeus was included on this work with the objective of contrast FK with formal information available of catch-per-unit-effort (CPUE) time series. Both sources of information, despite are not comparable, shows declines ~ - 80%. The critical conservation situation of study species needs urgent management action, particularly for the san tiger shark which could became regionally extinct before the reaction of stakeholders occurs.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000100202	
Editor: 	Sociedade Brasileira de Ictiologia	
Relação: 	10.1590/1982-0224-20150081	
Formato: 	text/html	
Fonte: 	Neotropical Ichthyology  v.14 n.1 2016	
Fonte: 	info:eu-repo/semantics/openAccess