• Gonad maturity index

The degree of maturity of the gonads is also characterized by maturity coefficient and maturity index. The maturity coefficient is the ratio of gonads weight to fish body weight (in %). In fish with spring-summer spawning (carp, pikeperch, roach, etc.), the maturity coefficient is highest in spring, decreases in summer, and begins to increase again in the fall. Fish with fall-winter spawning (salmon) have the highest maturity factor in the fall.

Gonad maturity index - the percentage ratio of the gonad maturity index calculated in separate periods of their maturation to the maximum maturity index.

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Gonad maturity index

Tags: gonad maturity index