1Fisheries College and Research Institute, Tamil Nadu Dr. J. Jayalalithaa Fisheries University, Thoothukudi-628 008, Tamil Nadu, India
2Tamil Nadu Dr. J. Jayalalithaa Fisheries University, Vettar River View Campus, Nagapattinam-611 002, Tamil Nadu, India
3Department of Fisheries Biology and Resource Management, Fisheries College and Research Institute, Thoothukudi-628 008, Tamil Nadu, India
4Department of Fisheries Extension, Economic and Statistics, Fisheries College and Research Institute, Thoothukudi-628 008, Tamil Nadu, India
5Department of Aquatic Environment Management, Fisheries College and Research Institute, Thoothukudi-628 008, Tamil Nadu, India
6Regional Centre for Central Institute of Freshwater Aquaculture, Vijayawada-521 137, Andhra Pradesh, India
7Dr. M.G.R. Fisheries College and Research Institute, Ponneri-601 204, Tamil Nadu, India
*Corresponding Author: Hari Prasad Mohale, Fisheries College and Research Institute, Tamil Nadu Dr. J. Jayalalithaa Fisheries University, Thoothukudi-628 008, Tamil Nadu, India, Email: haricof92@gmail.com
Online published on 9 August, 2024.
The present study of the length-weight relationship and condition factors of two Eutropiichthys vacha and Rita kuturnee, from Godavari River Andhra Pradesh, from the year August 2021 to July 2023 at fortnightly intervals.
The log transformation formula was employed to establish length-weight relationships (LWRs) [3]. The length-weight equation used was W=aLb, in the usual notations. Linear regression of the log-transformed equation, log(W) = log(a) + b log(L), was utilized to calculate the parameters ‘a’ (intercept) and ‘b’ (slope) of the relationship.
A total of 1453 specimens of E. vacha and 1273 specimens of R. kuturnee were collected by using gill nets. The collected specimens exhibited a total length range of 10 to 27 cm for E. vacha and 7 to 18.5 cm for R. kuturnee. Correspondingly, the body weight range was recorded as 12 to 140 gm for E. vacha and 8 to 50 gm for R. kuturnee. Statistical analysis revealed a negative allometric growth trend for both males and females of E. vacha and R. kuturnee, with b values ranging from 2.569 to 2.711 I for E. vacha and 2.53 to 2.61 for R. kuturnee. The fluctuation in the relative condition factor ranged from 1.06 to 1.09 for E. vacha and 1.001 to 1.12 for R. kuturnee. Furthermore, the overall health conditions of these two species were determined to be favorable.
Allometric growth, Condition factor, Fishes, Length-weight relationship
