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broodstock rearing. Usually the feed is offered to catfish on a body weight basis during broodstock rearing. So sampling at regular intervals is necessary to ensure the health and gonadal state of the fish. Provision of feed @ 2-3% of body weight is sufficient for brood fish for their growth. The ration size in the catfish is influenced by water temperature and catfishes accept feed less efficiently during winter. So the usual ration size should be wisely monitored depending on the condition to reduce the feed cost. The feeding rate is higher in catfish during late hours of the day compared to morning hours.

Conclusion The present state of information on broodstock nutrition of catfish contains many gaps as our knowledge on the specific nutrient requirements of broodstock remains limited. Male reproducer nutrient requirements for optimal spermatophore development and high sperm quality should receive special attention, as most publications focus on females only. Finally, it must be remembered that broodstock maturation takes place over extended periods and the fish must be cultivated under optimum conditions with minimum stress throughout the rearing period. Thus there is a need for good husbandry practices like low stocking densities, good water quality, and appropriately formulated diets that are species specific. Once our knowledge of the nutritional requirements and endocrinology of catfish broodstock has improved, it will be possible to formulate artificial diets in such a way that a high, consistent and prolonged reproductive performance will be ensured. The challenge will be to do it in a cost effective manner at commercial scale.

ΊHF

More information Contact Alok Kumar Jena for more information and references.

E: alokkumarjena427@gmail.com

Hatcheryfeed vol 5 issue 4  

The latest in feed and nutrition for early life stage and broodstock aquatic species. Hatcheryfeed is a quarterly magazine from Aquafeed.com...

Hatcheryfeed vol 5 issue 4  

The latest in feed and nutrition for early life stage and broodstock aquatic species. Hatcheryfeed is a quarterly magazine from Aquafeed.com...