Induced Breeding Practices of the Freshwater Fish Hatcheries in Bangladesh

Authors: Chakraborty BK*

DOI: 10.23880/ijoac-16000225

Volume 6, Issue 3

Abstract

This study was conducted on the fish hatcheries of the 8 division of Bangladesh to identify about induced breeding practices of different hatcheries. About 6 native species viz. Rui (Labeo rohita), Catla (Catla catla), Mrigel (Cirrhinus mrigala), Calibaush (Labeo calbasu), Bata (Labeo bata) and Gonia (Labeo gonius), 7 exotic species viz. Silver carp (Hypopthalmicthys molitrix), Bighead carp (Hypopthalmicthys molitrix), Grass carp (Ctenopharyngodon idella), Common carp (Cyprinus carpio), Black carp (Mylopharyngodon piceum), Thai pangus (Pangasius sutchi), Thai puti or raj puti (Barbonymus gonionotus) and 06 Indigenous species pubda (Ompok pabda), Gulsa (Mystus cavasius), Tengra (Mystus tengra), Koi (Anabas testudineus), Shing (Heteronopneustes fossilis) and Magur (Clarius batrachus) were recorded for the induced breeding practice of fresh water of Bangladesh. Three types of inducing agents viz. PG (Pituitary Gland), HCG (Human Chorionic Gonadotropin) and GnRHa (Gonadotropin Releasing Hormone analogues) were used for induced breeding. Ovulation rate of Indian major carps and other exotic fish species were 65, 70, 74, 80, 84, 88, 92, 96, 98, 90 and 88%, respectively. The regression type is Polynomial and the equation is y = -0.751x2 + 11.36x +49.705 (R2 = 0.8449). The hatching rate were recorded at the rate of 52, 55, 62, 71, 77, 80, 86, 90, 94, 80 and 62%, respectively in different hatcheries and the regression type is Polynomial and the equation is y = -1.1254x2 + 15.96x +29.182 (R2 = 0.8328). The ovulation rate of 06 Indigenous fish species were 70, 76, 81, 84, 86, 88, 97, 98, 99, 90, 84 and 70%, respectively. The regression type is Polynomial and the equation is y = -1.0082x2 + 12.96x + 53.97 (R2 = 0.8749). The hatching rate were recorded at the rate of 58, 61, 72, 76, 82, 91, 93, 94, 73, 68 and 6%%, respectively. The regression type is Polynomial and the equation is y = -1.289x2 + 16.269x +36.958 (R2 = 0.849).  

Keywords: Induced Breeding; Inducing Agents; PG; HCG; Gnrha; Brood Fishes; Ovulation; Hatching

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