Growth and longevity of the mola carplet Amblypharyngodon mola (Cyprinidae) in the Payra River, southern Bangladesh

The growth and longevity of Amblypharyngodon mola was studied in the Payra River, southern Bangladesh, using length-frequency distributions during February 2016-January 2017. Both males and females first recruited in June, with modal size around 25 mm standard length. Growth for both sexes was described by the von Bertalanffy growth equation as: Lt = 50.10[1 − exp {−0.145(t + 2.926)}] for males and Lt = 51.64[1 − exp {−0.135(t + 3.326)}] for females. Both sexes showed similar growth patterns as no significant difference was observed between the sexes (F-test, F = 1.89; p = .167). The longevity of this species was estimated to be 1 + year (13 months for males and 15 months for females). Standard length vs. body weight relationship indicated an isometric growth in both sexes. However, ANCOVA revealed significant differences in intercept (p < .05) between sexes, though not with slopes (p = .420).