Relationships among Gonad Weight, Liver Weight and Body Weight of Major, Common and Some Chinese Carps under Composite Culture System with Special Reference to Pond Fertilization

Shahid Mahboob,A N Sheri

doi:10.5713/ajas.2002.740

Abstract

The relationship of gonad weight and liver weight with body weight of six fish species viz; Catla catla, Labeo rohita, Cirrhina mrigala, Hypophthlamichthys molitrix, Ctenopharyngodon idella and Cyprinus carpio under the influence of artificial feed, broiler manure, buffalo manure, N:P:K (25:25:0) and a control pond were examined after a rearing period of one year. The positive relationship between gonad weight and body weight was significant which showed the dependence of gonadal development on body weight in all the six fish species. The currelation coefficients were higher in female fishes. However, the major carps had a much smaller proportional gonadal weight as compared with Chinese carps and a common carp due to their faster growth rate. The overall comparison of six fish species under different experimental treatments revealed that highest liver weight was observed for C. idella closely followed by C. carpio. The maximum correlation value was observed with H. molitrix under the broiler manure. The maximum Gonadosomatic Index (GSI) remained as 32.63 for C. carpio followed by C. idella. The maximum value for Hepatosomatic Index (HSI). remained 1.99 for C. idella followed by C. mrigala. (Asian-Aust. J. Anim. Sci. 2002. Vol 15, No. 5 : 740-744)

Highlights

The condition of fish is affected by its gonad weight and visceral weight
One of the most common ways to account for the effect of body size on gonadal size has been to represent gonadal weight as a percentage of body weight, and the gonadosomatic index (GSI) introduced by Mein
C. carpio placed on T1, T2, T3, T4 and T5 showed the percentage losses as 43.49, 41.15, 44.40, 40.88 and 47.56, respectively, while in C. idella the minimum and maximum losses were 25.53 and

Summary

Introduction

The condition of fish is affected by its gonad weight and visceral weight. in some fish species the gonad increases isometrically with body weight (LeCren, 1951).Dunham et al (1985) mentioned that viscera percentage had phenotypic association with dressing percentage. The condition of fish is affected by its gonad weight and visceral weight. In some fish species the gonad increases isometrically with body weight (LeCren, 1951). Dunham et al (1985) mentioned that viscera percentage had phenotypic association with dressing percentage. They found that no traits could be measured from live fish that would predict viscera percentage. In most teleostean species gonadal weight depends, in part, on body weight (Mahboob and Sheri, 1997). GSI presumes a constant arithmetic relationship of gonadal weight over the range of fish weight being sampled

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