Broodstock development and captive maturation of hilsa (Tenualosa ilisha) in a brackishwater pond-based system.

Autor: De D; Nutrition Genetics and Biotechnology Division, Kakdwip Research Centre of ICAR - Central Institute of Brackishwater Aquaculture, Kakdwip, India., Shyne Anand PS; Crustacean Culture Division, ICAR - Central Institute of Brackishwater Aquaculture, Chennai, India., Mukherjee S; Nutrition Genetics and Biotechnology Division, Kakdwip Research Centre of ICAR - Central Institute of Brackishwater Aquaculture, Kakdwip, India., Kumar P; Fish Culture Division, Kakdwip Research Centre of ICAR - Central Institute of Brackishwater Aquaculture, Kakdwip, India., Dayal JS; Nutrition Genetics and Biotechnology Division, ICAR - Central Institute of Brackishwater Aquaculture, Chennai, India., Raja RA; Aquatic Animal Health and Environment Division, ICAR - Central Institute of Brackishwater Aquaculture, Chennai, India., Bera A; Fish Culture Division, ICAR - Central Institute of Brackishwater Aquaculture, Chennai, India., Suresh VR; Riverine Ecology Fisheries Division, ICAR - Central Inland Fisheries Research Institute, Barrackpore, India., Vijayan KK; Aquatic Animal Health and Environment Division, ICAR - Central Institute of Brackishwater Aquaculture, Chennai, India.
Jazyk: angličtina
Zdroj: Journal of fish biology [J Fish Biol] 2020 Sep; Vol. 97 (3), pp. 720-733. Date of Electronic Publication: 2020 Aug 04.
DOI: 10.1111/jfb.14426
Abstrakt: Successful captive broodstock development of clupeid fish, hilsa, is one of the major challenges for the artificial propagation of this economically valued fish. The present study provides novel insights into the pond-reared captive broodstock development of hilsa using artificial feed. In the present study, wild collected hilsa fry (weight 1.35 ± 0.13 g, length 53.84 ± 0.95 mm) were reared in grow-out ponds for 6 months followed by maintaining them as broodstock in other ponds using formulated feed in both cases. After 6 months of pond rearing, the average body weight and length of fish were 66.76 ± 4.53 g and 184.75 ± 3.65 mm, respectively. In broodstock ponds, hilsa subadults fed with formulated feed (crude protein 41.06%) ensured significant advancement in ovarian maturity with gonado somatic index of 9.09%, enhanced secondary yolk stage oocytes of 91.66% and enlargement of oocyte diameters up to 570 μm. The broodstock reached somatic growth such as average body weight and average body length of 383.80 ± 27.38 g and 339.33 ± 9.68 mm, respectively, with a condition factor of 1.06 ± 0.15. Gut content analysis revealed the better acceptability of the artificial feed. Lipid profiling of muscle and ovary during gonadal maturation revealed mobilization of fat from muscle to ovary and selective retention of some fatty acids (i.e., C14:0, C18:0, C20:5, C22:6 and C20:4) in the ovary, which might help in gonadal maturation. STATEMENT OF SIGNIFICANCE: Successful rearing of wild-caught hilsa juvenile in captive condition using formulated feed showed its potential as aquaculture species in low saline conditions. Advance stage of maturation in low saline captive conditions showed the possibility for induced breeding of hilsa, a high priced anadromous fish. Mobilization of fat from muscle to ovary and selective retention of some fatty acids in the ovary showed the scope of dietary manipulation for broodstock development of hilsa.
(© 2020 The Fisheries Society of the British Isles.)
Databáze: MEDLINE
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