Evaluation of reproductive performance in indigenous endemic ornamental fish Sahyadria denisonii using hormones under captive environment

Aim: The present study aimed to develop the hatchery technology for production of indigenous ornamental fish Sahyadria denisonii to ensure year round seeds and for conservation of natural resources.Methodology: In the present investigation, brooders were collected from wild, acclimatized to hatchery condition and enriched under captive environment. The mature brooders were injected with three different synthetic hormones namelyt. Human chorionic gonadotropin (HCG), Ovatide and WOVA-FH at different doses (0.3, 0.5, 0.7 and 0.9 ml/kg of female and half a dose to male). Results: Fishes did not release their gametes naturally after inducement. Hence, artificial fertilization was carried out after 16 hrs of injection. Among the synthetic hormones used WOVA-FH @ 0.5 ml kg-1 of female and half a dose to male showed better breeding performance in terms of number of spawned eggs, fertilization rate (75.3%) and hatching rate (83.0%). Interpretation: Synthetic hormone WOVA-FH, human chorionic gonadotropin (HCG) and ovatide to female and male through artificial fertilization can be adopted for captive breeding of Indigenous endemic ornamental fish Sahyadria denisonii.

Tilapia – An Excellent Candidate Species for World Aquaculture: A Review

Aquaculture is currently playing, and will continue to play, a big part in boosting global fish production and in meeting the rising demand of fishery products. Capture fisheries production has levelled off and is no longer considered capable of sustaining the supply of fisheries products needed to meet the growing global demand. Tilapia is the common name for several species of cichlid fish inhabiting freshwater streams, ponds, rivers and lakes and less commonly in brackish water. Considered as an invasive species, tilapias are now of increasing importance in Aquaculture. Tilapia is the second most farmed fish world-wide and its production has quadrupled over the past decade because of its suitability for aquaculture, marketability and stable market prices. Native to Africa and Middle East, tilapias were introduced into over 90 countries for aquaculture and fisheries. Tilapia continued its rapid increase in global production. Recent production figures reported by various sources, our global production estimate for 2015 is 5,576,800 mt. Tilapias are now one of the most widely introduced fish globally that has clearly emerged as a very promising group in aquaculture.