Thumbnail Image

Thesis

Browse

20181
Reset filters
Subject: Aquaculture × Author: GANESH, GUGULOTHU × Start date: 1981 ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    STUDIES ON GROWTH AND SURVIVAL IN GROWOUT PHASE OF FINFISH SPECIES IN FLOATING NET CAGES
    (SRI VENKATESWARA VETERINARY UNIVERSITY TIRUPATI - 517 502. (A.P.) INDIA, 2018-08) GANESH, GUGULOTHU; CHAMUNDESWARI DEVI, B (MAJOR); CHANDRASEKHARA RAO, A; MADHAVI, K
    The present studies were conducted at the closed bay near Suryalanka, Baptla, Guntur on “Studies on growth and survival in grow out phase of finfish species in floating net cages.” Total three (3) studies were conducted. The first study was on the effect of stocking density on growth and survival of seabass Lates calcarifer floating net cages in closed bay, Baptla. Triplicates groups of sea bass with an average initial weight of 10.28±1.08were randomly stocked in floating net cages(1m×1m×2m) at 4,6,8 and 10fish/m3 designated as SD4, SD6, SD8 and SD10 respectively. Seabass in the cages were fed with 35% CP formulated diet at 5% of body weight twice daily. Sampling was done 15 days. At the end of the stocking trail, growth in terms of body weight, weight gain, specific growth rate and survival rate of fish was high in SD4 than those in SD6, SD8 and SD10. Total Feed conversion ratio was lower in SD4 Followed by SD6, SD8 and SD10. The cages stocked with 4 fish/m3 have highest growth performance and survival. 4 fish/m3 showed better survival percentage than SD6, SD8 and SD10. Water quality parameters were at optimum level during study period. Results suggest that 4 fish/m3 could be recommend for producing better quality sea bass and 10 fish/m3 for highest number of production. Second study was conducted to study the effect of stocking density on growth and survival of milk fish, Chanos chanos in floating net cages in closed bay, Baptla. Triplicates groups of milk fish with an average initial weight of 351.72±1.05 were randomly stocked in floating net cages (1m×1m×2m) at 6,8,10, and 12 fish/m3 designated as SD6, SD8, SD10 and SD12 respectively. Milk fish in the cages were fed with 35% formulated diet at 3% body weight below 350g and 2% of body weight above 500g of milk fish twicely. Sampling was done15 days. At the end of the stocking trail, growth in terms of body weight, weight gain, specific growth rate of fish was high in SD6 than those in SD8, SD10 and SD12. The cages stocked with SD6 fish/m3 have highest growth performance and survival is all stocking densities same performance. Water quality parameter were optimum level during study period. Results suggest that 6 fish/m3 could be recommended for producing better quality milk fish and12 fish/m3 for highest number of production. Another experiment was conducted to study the effect of stocking density on growth of milk fish brood stock in floating net cages in closed bay, Baptla. Triplicates groups of milk fish with an average initial weight of 720.30±1.36 were randomly stocked in floating net cages (1m×1m×2m) at 2, 4, 6 and 8 fish/m3 designated as T1, T2, T3 and T4 respectively. Milk fish in the cages were fed with 35% formulated diet at 2% body of milk fish twicely. Sampling was done15 days. At the end of the stocking trail, growth in terms of body weight, weight gain, specific growth rate of fish was high in T1 than those in T2, T3 and T4. The cages stocked with T1 fish/m3 have highest growth performance and survival is all stocking densities same performance. Water quality parameter were optimum level during study period. Results suggest that 2 fish/m3 brood stock could be recommended for producing better quality milk fish and 8 fish/m3 for highest number of production.