Exploring Induced Breeding Techniques in Aquaculture: Insights from North-Western Bangladesh | Chapter 6 | Emerging Issues in Environment, Geography and Earth Science Vol. 9

 This investigational study was conducted on the fish hatcheries of the north-western region of Bangladesh to know about their induced breeding practices. Nowadays, due to the degradation of the ecological balance, changing catchments, construction of drainage structures and flood control, siltation, soil erosion, washing of industrial pollutants and agrochemicals, the capture fisheries in open waters of Bangladesh is under great danger. The study deals with fish hatcheries of north-western region of Bangladesh. For the purposes, it was observed that 6 native species viz. Rui (Labeo rohita), Catla (Catla catla), Mrigel (Cirrhinus cirrhosus), Calibaush (Labeo calbasu), Bata (Labeo bata) and Gonia (Labeo gonius), 2 catfishes such as Shing (Heteronopneustes fossilis) and Magur (Clarius batrachus) and 7 exotic species viz. Silver carp (Hypopthalmicthys molitrix), Bighead carp (Aristichthys nobilis), Grass carp (Ctenopharyngodon idella), Common carp (Cyprinus carpio), Black carp (Mylopharyngodon   piceum), Thai pangus (Pangasius sutchi), Thai puti or raj puti (Barbonymus gonionotus) were used in the surveyed hatcheries for induced breeding purpose. Three types of inducing agents viz. PG (Pituitary Gland), HCG (Human Chorionic Gonadotropin) and GnRHa (Gonadotropin Releasing Hormone analogues) were used for induced breeding. The rate of the 1st dose of injection of PG varied from 1 to 4 mg/kg body weight, HCG varied from 100 to 200 IU/Kg body weight and GnRHa (only one dose) varied from 0.10 to 0.90 ml/kg body weight. The rate of the 2nd dose of injection of PG varied from 4 to 10 mg/kg body weight. Finally, the incubation period and hatching rates in different fish species varied from 10 to 70 hours and 55 to 85% respectively. For high quality and high quantity of fish production, it is important to give financial as well as logistic support, to share knowledge, and to organize workshops and seminars conducted by DoF and other research institutions.

Author(s) Details:

Naima Aktar,
Department of Zoology, Faculty of Life and Earth Science, University of Rajshahi, Rajshahi 6205, Bangladesh.

Please see the link here: https://stm.bookpi.org/EIEGES-V9/article/view/13834