Spawning performance of striped knifejaw, Oplegnathus fasciatus fed graded levels of ascorbyl-2-monophosphate Mg2+ as vitamin C source [2008]

Yong, Annita Seok Kian and Manabu Seoka, and Yuki Ohkawa, and Osamu Takaoka, and Kenji Takii, and Hidemi Kumai, (2008) Spawning performance of striped knifejaw, Oplegnathus fasciatus fed graded levels of ascorbyl-2-monophosphate Mg2+ as vitamin C source [2008]. Aquaculture Science, 56 (1). pp. 81-87. ISSN 2185-0194

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Abstract

This study aimed to improve spawning performance of striped knifejaw using ascorbyl-2-monophosphate Mg salt (APM) as a dietary ascorbic acid (AsA) source. Five experimental diets, a control diet 1 without APM and four test diets 2-5 with 500, 1,000, 3,000 and 6,000 mg AsA/kg diet in an equivalent basis of APM, respectively, were prepared using a semi purified fish meal basal diet. Each diet was fed to duplicate broodfish groups consisting of 4 females and 2 males, having mean body weight of 587 and 595 g, respectively, once a day for 21 weeks, from April 2006. Dietary APM promoted earlier onset of spawning and induced a tendency of improving egg quality; diet 2 had higher tendencies in egg production, buoyancy, hatching rate and larval survival activity index. Dietary APM significantly correlated to AsA levels in eggs. Groups fed diets 4 and 5 tended to induce higher abnormal larvae than groups fed diets 1-3. These results revealed that the broodfish of striped knifejaw effectively utilized APM as a dietary AsA source and promoted the early onset of spawning and performance; but high dietary APM might cause ill effects on egg quality.

Item Type: Article
Uncontrolled Keywords: Ascorbyl-2-phosphate Mg²+ , Striped knifejaw , Spawning performance , Ascorbic acid
Subjects: S Agriculture > SH Aquaculture. Fisheries. Angling
Divisions: SCHOOL > Borneo Marine Research Institute
Depositing User: Noraini
Date Deposited: 05 Jul 2018 06:40
Last Modified: 05 Jul 2018 06:40
URI: http://eprints.ums.edu.my/id/eprint/20378

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