TY - JOUR
T1 - Seasonal changes of the RNA/DNA ratio, size and lipid contents and immigration adaptability of Japanese glass-eels, Anguilla japonica, collected in northern Kyushu, Japan
AU - Kawakami, Y.
AU - Mochioka, N.
AU - Kimura, R.
AU - Nakazono, A.
PY - 1999/5/1
Y1 - 1999/5/1
N2 - RNA/DNA ratios and the condition factor, as determined by weight and length of glass-eels, Anguilla japonica, were evaluated for assessment of nutritional status. The negative correlation of RNA/DNA ratios and condition factor between capture months corresponded to an increase in DNA content and to a decrease in dry weight, respectively. These findings indicated that the body material decreased in the later caught glass-eels, but, in contrast, DNA content and ossification increased. These phenomena were explained by such factors as food density and metabolic energy requirements. We concluded that the development of the glass-eel with poor feeding is influenced by differences in ambient water temperature, and that expended endogenous nutrition originates in the leptocephali.
AB - RNA/DNA ratios and the condition factor, as determined by weight and length of glass-eels, Anguilla japonica, were evaluated for assessment of nutritional status. The negative correlation of RNA/DNA ratios and condition factor between capture months corresponded to an increase in DNA content and to a decrease in dry weight, respectively. These findings indicated that the body material decreased in the later caught glass-eels, but, in contrast, DNA content and ossification increased. These phenomena were explained by such factors as food density and metabolic energy requirements. We concluded that the development of the glass-eel with poor feeding is influenced by differences in ambient water temperature, and that expended endogenous nutrition originates in the leptocephali.
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U2 - 10.1016/S0022-0981(98)00166-X
DO - 10.1016/S0022-0981(98)00166-X
M3 - Article
AN - SCOPUS:0033135403
VL - 238
SP - 1
EP - 19
JO - Journal of Experimental Marine Biology and Ecology
JF - Journal of Experimental Marine Biology and Ecology
SN - 0022-0981
IS - 1
ER -