The Indian river shad, Gudusia chapra, is a commercially important clupeid that contributes to subsistence and artisanal fisheries in inland waters in Bangladesh. Population parameters for this species were collected from a study of a population in a large perennial pond in Mymensingh, Bangladesh from May 2003 to April 2004. The gonado-somatic indices indicated a spawning season in spring, with a mean birth date estimated as 30 April. The growth equations, provided by three models, for males and females respectively, were: Lt = 140.42 (1- exp (-0.026 (t + 6.717))) and Lt = 145.39 (1- exp (-0.025 (t + 7.113))) for the von Bertalanffy model; Lt = 121.53 exp (-exp (-0.050 (t - 8.274))) and Lt = 124.95 exp (-exp (-0.048 (t - 8.421))) for the Gompertz model; and Lt = 114.27 / (1 + exp (-0.074 (t – 14.260))) and Lt = 117.19 / (1 +2 exp (-0.071 (t - 14.524))) for the Robertson model, where Lt is standard length (mm) at age t (weeks). Growth was best described by the von Bertalanffy growth equation for both male and female based on Chi-squared (χ2) values and Akaike’s information criterion. The absolute growth rates of males were slower than that of females. The von Bertalanffy growth model expressed in terms of body weight (BW) yielded functions for males and females of: BWt = 53.63 (1- exp {-0.028 (t + 6.320)))3 and BWt = 53.89 (1- exp (-0.023 (t + 9.215))3, respectively.
Absolute fecundity (Fa) of burbot Lota lota lota females from Lake Haƒcza was 47.3 - 439.8 × 103, the relative fecundity based on eviscerated weight (Fwo) was 617.9 - 1572 × 103, and that based of total weight (Fw) was 44.8 - 1234.5 × 103. Regression equations were calculated, approximating the most significant relationships between fecundity and total body length of burbot (Fa = 0.0138 Sl2.5678, Fa = 0,0099 Tl2.8129) and weight (Fa = 0.6481 W1.0144). Mean gonadosomatic indexes (GSI) increased slightly with body length from 3.9 to 8.8% for females and from 3.7 to 20.6% for males.
The breeding and sexual maturation properties of a cyprinid fish Capoeta tinca were studied in Gelingüllü Reservoir, a recently impounded dam in Central Anatolia. Ripening of gonads commenced in early spring, whereas spawning occurred between May and June. Sexual maturity age was 2+ for males and 3+ for females. The results obtained from this study were compared with those of other populations of C. tinca in Turkey.