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María?Inés?LorenzoEmail author André?M.?Vaz-dos-Santos Carmen?Lúcia?D.?B.?Rossi-Wongtschowski 《Environmental Biology of Fishes》2011,91(2):155-164
Morphology and morphometry of the sagittae otolith were studied in young of the year Argentine hake, Merluccius hubbsi in the Southeastern Atlantic. Geographical variation in the growth pattern of the young of the year Merluccius hubbsi was correlated with the differences found in otolith morphometry, relative growth, ring positions, as well as the formation
of a new ring. The otolith development of M. hubbsi throughout its area of distribution accompanies an increasing northward temperature gradient, resulting in bigger otoliths
and greater variability of ring position from northern to southern area. The canonical discriminate analysis showed that the
otolith length and height explained most of the variation of the first discriminant function. We found significant differences
in the discriminant scores between those samples from northern and southern area. As regards the Uruguayan coast and Southern
Brazil, age groups zero shared some similarity as well as differences in growth; environmental features explain these differences
but their effect on the adult fishes growth is still unknown. 相似文献
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