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Validation of age determination using otoliths of the European anchovy (Engraulis encrasicolus L.) in the Bay of Biscay ArchiMer
Uriarte, A.; Rico, I.; Villamor, B.; Duhamel, Erwan; Duenas, C.; Aldanondo, N.; Cotano, U..
Validation of the age determination procedure using otoliths of European anchovy in the Bay of Biscay was achieved by monitoring very strong year-classes in successive spring catches and surveys, as well as the seasonal occurrence of edge types. Historical corroboration of the ageing method was obtained by cross-correlation between successive age groups by year-classes in catches and surveys (1987–2013). Summary annual growth in length is also presented. Yearly annuli consist of a hyaline zone (either single or composite) and a wide opaque zone, disrupted occasionally by some typical checks (mainly at age-0 and age-1 at peak spawning time). Age determination, given a date of capture, requires knowledge of the typical annual growth pattern of otoliths,...
Tipo: Text Palavras-chave: Age estimation; Checks; Engraulidae; Otolith formation..
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00342/45343/44806.pdf
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