Data/hora: 09/06/2024 05:48:39

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	
Formato: 	1151391 bytes

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