Data/hora: 08/06/2024 13:54:21

Provedor de dados: | 20
País: | Belgium

Título:

Variaciones estacionales en el crecimiento de larvas de anchoita (Engraulis anchoita).

Seasonal variations in growth of anchovy larvae (Engraulis anchoita).

Autores: | Leonarduzzi, E.
Data: | 2007-02-09
Ano: | 2002
Palavras-chave: | Fish larvae; Growth; Otoliths; Seasonal variations; Daily variation; Growth; Otoliths; Fish larvae.
Resumo: | Age and growth rates of southern anchovy larvae (Engraulis anchoita)were estimated by analysis of daily increments in sagittal otoliths under light microscopy. Samples were collected during 2002 with a bongo net, in the Buenos Aires province, Argentine Sea (SW Atlantic). Otoliths corresponding to 251 larvae (size range 3.5 u 12.2 mm SL)were analyzed. Growth rate estimated as slopes by linear regression of length-age data were 0.50, 0.40, and 0.42 mm/day, and these values corresponded to larvae collected in spring, summer and autumn. Larval growth were significantly distinct between the year seasons (ANCOVA, p&lt;0.01). Recent larval growth expressed as mean growth rates during the last 4 days of the larvae was not correlated with surface temperature. The variation in growth between the three seasons seems to be related to fluctuation in chlorophyll-a concentration and the cycle of primary and secondary production typical of temperate seas.
Tipo: | Theses and Dissertations
Idioma: | Espanhol
Identificador: | http://hdl.handle.net/1834/1484

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