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Scirj Volume VII, Issue II, February 2019 Edition
ISSN: 2201-2796

Growth performance and survival of monosex cultured Heterobranchus longifilis juveniles in concrete flow-through and stagnant water systems

Robert E.A., Yisa A.T., Tsadu S.M.

Abstract: The growth performance and survival rate of monosex Heterobranchus longifilis juveniles were examined. A total of 144 Heterobranchus longifilis juveniles were stocked in eighteen (18) concrete tanks at stocking density of sixteen (16) fishes per tank of 2 by 2 metre square in flow-through and stagnant water systems triplicated for fifty six (56) days. Mixed sex tanks of Heterobranchus longifilis served as the control. The mean initial weight was taken as 1.22±0.00g while the highest mean final weights were 7.86±0.12a g and 6.34±0.02c g for monosex females and males in stagnant culture THFS and THMS. Heterobranchus longifilis also showed highest Specific growth rate of 3.80±0.03g in the female stagnant system THFS. Food conversion ratio and Feed conversion efficiency were highest in female flow-through tank THFF and stagnant tank THFS with values 4.09±0.00a and 16.83±0.08a. Performance Index showed Heterobranchus longifilis mixed sex performed better than the flow-through monosex culture of Heterobranchus longifilis. High survival rate 95.83±4.17% was seen in female stagnant tanks THFS. Lowest survival rates were recorded in the monosex flow-through and stagnant systems of Heterobranchus longifilis. Condition factor K was greater than 1 throughout the study for both species. Values were closely similar for the specie in monosex and mixed sex culture. Water quality parameters were at normal ranges for freshwater culture, throughout the study. It is recommended that concrete flow-through and stagnant systems be used for monosex and mixed sex culture of Heterobranchus longifilis.

Reference this Paper: Growth performance and survival of monosex cultured Heterobranchus longifilis juveniles in concrete flow-through and stagnant water systems by Robert E.A., Yisa A.T., Tsadu S.M. published at: "Scientific Research Journal (Scirj), Volume VII, Issue II, February 2019 Edition, Page 43-65 ".

Search Terms: growth, survival, triplicates, monosex, Heterobranchus longifilis, flow-through, stagnant

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