Publication: Larval settlement of the tropical abalone, Haliotis asinina Linnaeus, using natural and artificial chemical inducers
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2008-08-01
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13652109
1355557X
1355557X
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2-s2.0-48749124854
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item.page.oaire.edition
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Mahidol University
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Aquaculture Research. Vol.39, No.11 (2008), 1181-1189
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Praphaporn Stewart, Nantawan Soonklang, Michael J. Stewart, Chaitip Wanichanon, Peter J. Hanna, Tanes Poomtong, Prasert Sobhon (2008). Larval settlement of the tropical abalone, Haliotis asinina Linnaeus, using natural and artificial chemical inducers. Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/18712.
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Larval settlement of the tropical abalone, Haliotis asinina Linnaeus, using natural and artificial chemical inducers
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Abstract
Many kinds of chemical and biological materials have been used as inducers of settlement of abalone larvae, as well as other species of marine gastropods, with responses being highly variable, even to the same chemical cue. The present study tested chemical inducers, γ-aminobutyric acid (GABA), δ-aminovaleric acid (5-AVA) and l-glutamic acid (GA) and the effects they have on larval settlement of Haliotis asinina. Additionally, a relatively inexpensive commercial substance, monosodium glutamate (MSG), was trialed. The datum provided shows all chemicals to be active inducers of settlement in this study, in order of effectiveness of 5-AVA, GABA, MSG to GA. Induction as adjudged from larval numbers settled was best at 6 h 62%, with 10-1mM 5-AVA. At 24 h, induction was the highest at 78% when exposed to 10-2mM 5-AVA. Larvae that were allowed to settle up to 72 h showed the highest numbers of settled larvae, and declined back to 60% when exposed to 10-25-AVA and 10-1mM GABA respectively. Monosodium glutamate, although third in settlement standings would bypass the other chemicals, with regard to cost versus yield. The assessment of settlement surface, rough or smooth proved to be irrelevant, which had no significant impact on larval settlement. © 2008 The Authors.