Grow-out culture of tropical abalone, Haliotis asinina (Linnaeus) in suspended mesh cages with different shelter surface areas
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- 作者：Fermin ; Armando C. ; Mae Buen ; Shela
- 关键词：Grow ; out ; Mesh cages ; Seaweed (Gracilariopsis bailinae) ; Shelter surface area ; Tropical abalone (Haliotis asinina)
- 刊名：Aquaculture International
- 出版年：2001
- 出版时间：2001
- 年：2001
- 卷：9
- 期：6
- 页码：499-508
- 全文大小：199 KB
- 刊物类别：Biomedical and Life Sciences
- 刊物主题：Life Sciences
Hydrobiology - 出版者：Springer Netherlands
- ISSN：1573-143X
文摘
Thisstudy investigated the effects of shelter surface area (SSA) on the feeding,growth and survival of the donkey-ear abalone, Haliotisasinina reared in mesh cages (0.38×0.38×0.28m) suspended in flow-through tanks (water volume = 6m3). Cages had sections of polyvinylchloride (PVC) thatprovided shelters with surface area of 0.22 m2, 0.44m2 and 0.66 m2.Hatchery-produced abalone with initial shell length of 32 ± 1mm and wet weight of 7.5 g were stocked at 50individuals cage−1 that corresponded to stocking densities ofca. 227, 113 and 75 abalone m−2 of SSA. The ratios of sheltersurface area to cage volume (SSA:CV) were 5.5, 11 and 16.5. Abalones wereprovided an excess red seaweed Gracilariopsis bailinae (= Gracilaria heteroclada ) at weekly intervals overa 270-day culture period. Feeding rates (18–20% of wet weight), foodconversion ratio (26–27) and percent survival (88–92%) did notdiffer significantly among treatments (p > 0.05). Body size at harvest rangedfrom 56 to 59 mm SL and 52 to 57 g wet body weightwith significant differences between abalone reared at SSA 0.22m2 and 0.66 m2 (p < 0.05).Abalone reared in cages with 0.66 m2 SSA grewsignificantly faster at average daily growth rates of 132 μm and188 mg day−1. Stocking densities of 75–113m−2 SSA in mesh cages suspended in flow-throughtanks resulted in better growth of abalone fed red seaweed.