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Tesis En Ciencias Marinas >
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http://hdl.handle.net/1834/1484
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| Titre: | Variaciones estacionales en el crecimiento de larvas de anchoita (Engraulis anchoita). |
| Autre(s) titre(s): | Seasonal variations in growth of anchovy larvae (Engraulis anchoita). |
| Auteur(s): | Leonarduzzi, E. |
| Theses advisor: | Sánchez, R.P. |
| mot-clé ASFA: | Fish larvae
Growth
Otoliths
Seasonal variations
Daily variation |
| Date de publication: | 2002 |
| Résumé: | 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<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. |
| URI/URL: | http://hdl.handle.net/1834/1484 |
| Collection(s) : | Tesis En Ciencias Marinas
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