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Hepatocyte nuclear size and nutritional condition of larval pejerrey, Odontesthes bonariensis (Cuvier et Valenciennes)
Author(s) -
Strüssmann C. A.,
Takashima F.
Publication year - 1990
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1990.tb03519.x
Subject(s) - biology , larva , zoology , hepatocyte , fish <actinopterygii> , anatomy , ecology , fishery , biochemistry , in vitro
This paper presents evidence that the size of the nuclei of parenchymal cells of the liver is correlated with the nutritional status of first‐feeding pejerrey larvae, Odontesthes bonariensis (Cuvier et Valenciennes). Kariometry revealed that larvae which successfully began exogenous feeding maintained the large nuclear sizes attained during the period of endogenous feeding. In contrast, nuclei of fasted larvae shrank gradually and lowest values were attained before starvation death. The degree of shrinkage seemed to be dependent on rearing temperature; reduction in nuclear area was faster and more pronounced at higher temperatures. In addition, mean hepatocyte nuclear areas of larger as well as of triploid fish are presented. The results suggest that hepatocyte nuclear size might constitute an alternative indicator for the identification of starving condition in field larval specimens.