Present study describes the length-weight (LWR) and length-length (LLR)
relationships of a freshwater
catfish Eutropiichthyes vacha Hamilton from Indus River, Sindh, Pakistan. A total of ۲۸۱ specimen of E. vacha were collected from fisherman?s catch from February ۲۰۰۵ to January ۲۰۰۶, are used for this study. The parameters a and b of the length-weight relationship were calculated as W= aLb are presented. The values for allometric coefficient b of the LWR were close to isometric value for male (b = ۳.۱۵۹) and combined values for both sexes (b = ۳.۰۵۳). However, it suggested negative allometric growth for females (b = ۲.۹۷۳). Results for LLRs indicated that these are highly correlated (r۲ > ۰.۹) P< ۰.۰۰۰۱. REFERENCES Agarwal, N.K. (۱۹۹۶) Fish reproduction. APH Publishing Corporation, N. Delhi. pp. ۱۵۷. Begenal, T. and Tesch, F.W. (۱۹۷۸) Age and Growth. Method for assessment of fish production in freshwater. (ed. Bagenal T.), IBP Hand book, Blackwell Scientific Press, Oxford. Hossain, M.Y., Ahmed, Z. F., Leunda, P. M., Jasmine, S., Oscoz, J. Miranda, R. and Ohtomi, J. (۲۰۰۶) Condition, length-weight and length-length relationship of the Asian striped
catfish Mystus vittatus (Bloch, ۱۷۹۴) (Siluriformes: Bagridae) in the Mathbhanga River, southwestern Bangladesh. J. Appl. Ichthyol. ۲۲, ۳۰۴-۳۰۷. Le Cren, E.D. (۱۹۵۱) The length-weight
relationships and seasonal cycle in gonad
weight and condition in the perch (Perca fluviatilis). J. Anim. Ecol. ۲۰, ۲۰۱-۲۱۹. Martin-Smith, K.M. (۱۹۹۶) Legth-weight
relationships of fishes in diverse tropical fresh-water community, Sabah, Malaysia. J. Fish. Biol. ۴۹, ۲۹۷-۲۹۸. Mirza, M.R. and Bhatti, M.N. (۱۹۹۹) Biodiversity of the freshwater fishes of Pakistan and Azad Kashmir. Proc. Aq. Biodiversity, Pakistan (eds. Q.B. Kazmi and N.A. Kazmi). pp. ۱۷۷-۱۸۴. Moutopoulos, D.K. and Stergiou, K.I. (۲۰۰۲) Length-weight and length-length
relationships of fish species from Aegean Sea (Greece). J. Appl. Ichthyol. ۱۸, ۲۰۰-۲۰۰۳. Pauly D, Gayanilo Jr. F.C. (۱۹۹۷) A Bee: An alternative approach to estimating the parameters of a length-weight relationship from
length frequency samples and their bulk weights. NAGA ICLARM, Manila, Philippines. Pitcher, T.J. and Hart, P.J. (۱۹۸۲) Fisheries Ecology. Chapman and Hall, London. Tesch, F., W. (۱۹۷۱) Age and Growth. Methods for assessment of fish production in fresh waters. (ed. Ricker W. E.). pp. ۹۹-۱۳۰. Blackwell Scientific Publications, Oxford. Zar, J.H. (۱۹۸۴) Biostatistical analysis. Prentice Hall, New Jersey. ۷۱۸ p.
