Induced Breeding, Embryonic and Larval Development of Koi Carp in Recirculatory Aquaculture System
Induced Breeding, Embryonic and Larval Development of Koi Carp in Recirculatory Aquaculture System
Kalaiselvi Natarajan1, Karal Marx Karuppiah1, Sheena K Baby1, Sakthivel Mohammed2, Shanmugam Seerappalli Aran1 and Suresh Eswaran1*
ABSTRACT
Koi carp (Cyprinus carpio) is a colourful and economically valuable ornamental fish species, which has numerous strains. Even though culture of Koi carp is practiced at many tropical countries, there is a very little information on the seed production and embryonic development of the species especially in RAS. The present study was aimed to study the breeding, embryonic and larval development of Koi carp in RAS system. The matured brooders were administered with three synthetic hormone ovaprim, ovatide and WOVA -FH at 0.7 ml per kg of body weight. Comparatively WOVA-FH at 0.7 ml per kg showed better performance with higher number of ovulated eggs, fertilization and hatching rate than ovaprim and ovatide. For dose optimization, the matured brooders were administered with synthetic hormone WOVA -FH at three different doses viz., 0.3, 0.5 and 0.7 and 1.0 ml per kg of body weight at triplicate basis. The highest number of ovulated eggs (3380.5 ±202.75), fertilization rate (90± 0.8) and hatching rate (88±0.88) were observed in the brooders that were induced with 0.5ml per kg of WOVA -FH. The average diameter of the fertilized eggs ranged between 0.9 and 1.10 mm while the yolk sphere ranged between 0.6 and 0.8 mm. The larvae hatched out after 72 h of fertilization. The total length of the larvae ranged from 2.7 to 2.9 mm. This study aims to analyze the application of RAS technology for year-round seed production of Koi carp. Further this study aims in developing sustainable aquaculture practices to facilitate aquaculturists.
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