DINESH KUMAR*,1, D. S. MALIK1, AMIT KUMAR SHARMA1 AND VARSHA GUPTA
Department of Biotechnology, Chhatrapati Shahu Ji Maharaj University, Kanpur-208 024 (U. P.), India
*(e-mail : dinesh.kanaujia@yahoo.com; **guptavarsha0210@gmail.com; Mobile : 9455411828)
(Received : March 17; 2019; Accepted : May 18, 2019)
ABSTRACT
In the present study length-weight relationships (LWRs) and length-length relationships (LLRs) of catfish, Rita rita from three selected zones of river Ganga from Haridwar to Kanpur are presented. Total 165 samples of Rita rita were randomly collected from commercial landing sites along the river Ganga during the year November, 2017 to September, 2018. The total length (TL), standard length (SL) and fork length (FL) of each fish sample were measured by fish measuring board in centimeter (cm) and weight in gram (g) by using electronic balance. From LWRs, the estimated ‘b’ and ‘a’ values were found to be 2.96 and 0.017, respectively. The obtained values of ‘b’ and ‘a’ ranged between 2.86-3.05 and 0.014-0.021, respectively, at 95% confidence limit. Length-length relationship showed that total length-standard length and total lengthfork length are highly correlated to each other i. e. r = 0.986 and 0.967, respectively. The observed value of ‘b’ ≤3 showed normal growth of Rita rita in the middle stretch of river Ganga.
Key words : Ganga river, Rita rita, length-weight relationship, length-length relationship