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Determinación de un cambio de habitat en los juveniles de caballa (Scomber japonicus)

Authors: Lorenzo Nespereira, José María; Castro, J.J.;

Determinación de un cambio de habitat en los juveniles de caballa (Scomber japonicus)

Abstract

Se realizó un estudio sobre 1839 juveniles de caballa (Srnmher jnpnicrrr), de ta!las comprenrdidas entre 3.5 y 18.5 cm, con el objeto de determinar sus hábitos alimentarios y parámetros morfométricos. La existencia de un descenso en el ritmo de crecimiento de la cabeza con respecto al cuerpo, entre los 13 y 15 cm. de longitud total, puede estar relacionado con un cambio de hábitat. El 20.4% de los individuos de tallas comprendidas entre los 13 y 18 cm presentaban otolitos con zonas hialinas anómalas anteriores a la formación del primer anillo de crecimiento anual. Estas presentan un marcado paralelismo con un cambio en la proporción de peces que constituyen la dieta de los individuos de este grupo de tallas.

The feeding habits and morphometric parameters of juveniles of chub mackerel (Scomber japonicus) were determined from 1839 individuals of 3.5 to 18.5 cm of total body length. In relation with the body growth: it was detected a descent in the growth pattern of the fish head over 13-15 cm of total length, and it can be related with an habitat change. The 20.4% of whole specimens with sizes between 13 to 18 cm of total lengthshowed otholits with anomalous zones before to the first annual ring. These characteristics show a great coincidence with a change in the proportion of fish in the diet of juveniles before and after 13 cm of total length.

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Keywords

310509 Influencia del hábitat, 2510 Oceanografía

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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