Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Registro completo
Provedor de dados:  5
País:  France
Título:  Age verification of north Atlantic sprat
Autores:  Moore, Claire
Lynch, Deirdre
Clarke, Maurice
Officer, Rick
Mills, Jane
Dufour, Jean-louis
Brophy, Deirdre
Data:  2019-05
Ano:  2019
Palavras-chave:  Sprat
Age verification
Otolith
Marginal increment analysis
Age structure
Resumo:  Sprat is a pelagic species of increasing commercial interest in European waters, yet little is known about its biology or the drivers of its population fluctuations. As a result, the species is currently without an analytical assessment or forecast across much of the North East Atlantic. The objectives of this study were to: verify otolithbased age estimation of sprat; assess the precision, bias and reproducibility of these age estimates; and, determine the age structure of sprat within one North East Atlantic management unit (Celtic Seas ecoregion). Samples were collected over three years (2011, 2013 & 2014) from both commercial catches and scientific surveys. Counts of daily increments in otoliths were used to establish when the first annulus was formed. The seasonal development of annuli was validated using marginal increment analysis. Age estimates were found to be both accurate and reproducible with no intra-reader bias and limited inter-reader bias (average coefficient of variation 2.7%). The age estimates indicate that the stock is comprised primarily of age 0, 1 and 2 year olds. This study has provided previously unavailable information on the biology and age structure of this species which is required to improve assessment and sustainable management of the species.
Tipo:  Text
Idioma:  Inglês
Identificador:  https://archimer.ifremer.fr/doc/00485/59692/62883.pdf

DOI:10.1016/j.fishres.2019.01.018

https://archimer.ifremer.fr/doc/00485/59692/
Editor:  Elsevier Science Bv
Formato:  application/pdf
Fonte:  Fisheries Research (0165-7836) (Elsevier Science Bv), 2019-05 , Vol. 213 , P. 144-150
Direitos:  info:eu-repo/semantics/openAccess

restricted use
Fechar
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional