Study of Weight and Linear Growth of Tench (Tinca tinca L.) Cultured in Fishponds

T. HUBENOVA-SIDEROVA and L. HADJINIKOLOVA

Institute of Freshwater Fisheries, BG-4003 Plovdiv, Bulgaria

Abstract

HUBENOVA-SIDEROVA, T. and L. HADJINIKOLOVA, 1999. Study of weight and linear growth of tench (Tinca tinca L.) cultured in fishponds. Bulg. J. Agric. Sci., 5: 465-474

Weight and linear growth of 5 age groups of tench (T. tinca L.), cultured in carp-type ponds, were studied. It has been established that the dynamics of those two parameters is age-dependent. Values of Fulton's condition coefficient were not always synchronized with body weight gain. No similarity was established in the dynamics of this coefficient and body fat content in the age groups studied. This leads to the statement that morphometry remains the chief possible area of application of Fulton's condition coefficient, where it has its own value as exterior index characterizing a definite conformation-and-weight group cultured under specific environmental conditions while fish fattening rate should be estimated as per body fat deposits.

Key words: tench, growth, condition factor, body fat content