Induced spawning of giant trevally Caranx ignobilis (Forsskl 1775) using human chorionic gonadotropin (hCG) and luteinising hormone releasing hormone analogue (LHRHa)

Magistrado Myleen Luna, . and Muyot Frederick Buensalida, . and Muyot Myla Celemen, . and Baral Janet Lucito, . and Mercene Mutia Maria Theresa, . Induced spawning of giant trevally Caranx ignobilis (Forsskl 1775) using human chorionic gonadotropin (hCG) and luteinising hormone releasing hormone analogue (LHRHa). pp. 118-127. ISSN 0116-6514

The giant trevally Caranx ignobilis (Forsskl 1775) was induced spawned at the National Fisheries Research and Development Institute Taal Batangas Philippines to assess the possibility of captive breeding. Caranx ignobilis captive broodstock six to eight-year-old (4.83 kg mean wt) were injected with: (a) 1 000 IU human chorionic gonadotrophin (hCG).kg-; (b) 100 g luteinising hormone-releasing hormone analogue (LHRHa).kg-; (c) 5 mg carp pituitary extract (CPE).kg-; and (d) No injection (Control). Ripe female fish was given two sequence intramuscular injections at 0600 to 0700 h and 1800 to 1900 h while male fish was given half dose injection at 1800 to 1900 h. One breeding set (1 female: 2 males) were released to spawn spontaneously in each of the four units of 40-ton circular tanks done in five replications. Successful spawning was achieved in LHRHa- and hCG-injected fish at 28“30 g.L- salinity and 27.6“29.25 C in March to April of 2011 and 2012. Spawning occurred 24“52 h after 2nd injection and eggs hatched in 11“17 h. Fertilisation rate was significantly higher (P 0.05) in LHRHa treatment (60.88 ) than hCG treatment (30.53 ). Mean spawned eggs hatching rate and mean larvae produced were not statistically different (P 0.05) between hCG (223 068 eggs.kg- breeder 43.06 and 41 547 larvae.kg- breeder respectively) and LHRHa treatment (176 524 eggs.kg- breeder 71.07 and 56 040 larvae.kg- breeder respectively). This is the first recorded captive breeding of C. ignobilis in the Philippines and an initial step towards developing the seed production technology for this new aquaculture species.

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Abstract

The giant trevally Caranx ignobilis (Forsskl 1775) was induced spawned at the National Fisheries Research and Development Institute Taal Batangas Philippines to assess the possibility of captive breeding. Caranx ignobilis captive broodstock six to eight-year-old (4.83 kg mean wt) were injected with: (a) 1 000 IU human chorionic gonadotrophin (hCG).kg-; (b) 100 g luteinising hormone-releasing hormone analogue (LHRHa).kg-; (c) 5 mg carp pituitary extract (CPE).kg-; and (d) No injection (Control). Ripe female fish was given two sequence intramuscular injections at 0600 to 0700 h and 1800 to 1900 h while male fish was given half dose injection at 1800 to 1900 h. One breeding set (1 female: 2 males) were released to spawn spontaneously in each of the four units of 40-ton circular tanks done in five replications. Successful spawning was achieved in LHRHa- and hCG-injected fish at 28“30 g.L- salinity and 27.6“29.25 C in March to April of 2011 and 2012. Spawning occurred 24“52 h after 2nd injection and eggs hatched in 11“17 h. Fertilisation rate was significantly higher (P 0.05) in LHRHa treatment (60.88 ) than hCG treatment (30.53 ). Mean spawned eggs hatching rate and mean larvae produced were not statistically different (P 0.05) between hCG (223 068 eggs.kg- breeder 43.06 and 41 547 larvae.kg- breeder respectively) and LHRHa treatment (176 524 eggs.kg- breeder 71.07 and 56 040 larvae.kg- breeder respectively). This is the first recorded captive breeding of C. ignobilis in the Philippines and an initial step towards developing the seed production technology for this new aquaculture species.

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Item Type:	Article
AGROVOC Term:	Caranx ignobilis
AGROVOC Term:	Carangidae
AGROVOC Term:	Marine fishes
AGROVOC Term:	Animal breeding
AGROVOC Term:	Hormones
AGROVOC Term:	Spawning
AGROVOC Term:	Fertilization
AGROVOC Term:	Seed production
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/9125

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