אסיף מאגר המחקר החקלאי

The regression of weight gain on initial weight in carp. I. Methods and results

Year:

1972

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Volume :

1

Co-Authors:

Wohlfarth, G.W., Fish Culture Research Station, Dor, Israel
Moav, R., Department of Genetics, Hebrew University, Jerusalem, Israel

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Abstract:

The dependence of weight gain on initial weight in carp was investigated in a series of eight experiments. The phenotypic (total) regression of weight gain on initial weight was partitioned into a temporary environment component and a residual component. The latter includes genetically caused regression. The partition was done through application of the multiple-nursing method which was devised specifically for this purpose. In all the experiments the phenotypic and the residual (genetic + developmental) regressions of weight gains on initial weights were positive. The 'temporary environmental' regression was positive during the warm summer season, but nil during the cool late fall and winter. In one experiment the presence of 'genotype-season' interaction was demonstrated. © 1972.

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