Journal article
The effect of chemical cues on settlement behaviour of blacklip pearl oyster (Pinctada margaritifera) larvae
Aquaculture, Vol.209(1-4), pp.117-124
2002
Abstract
Inducing more rapid or greater degree of settlement of blacklip pearl oyster (Pinctada margaritifera) larvae using chemical cues can significantly improve the commercial hatchery production of this valuable species. For this purpose, epinephrine, norepinephrine and γ-aminobutyric acid (GABA) were assessed at four concentrations (10-2, 10-3, 10-4 and 10-5 M), and in conjunction with plastic filaments for their ability to induce settlement of P. margaritifera larvae. In all concentrations tested, neither epinephrine nor norepinephrine had a significant effect on settlement and crawling behaviours of P. margaritifera larvae. Settlement of larvae occurred after 24 h in the presence of GABA at concentrations of 10-3 and 10-4 M; however, mortality was high (32%) at a concentration of 10-3 M. Settlement and crawling behaviours were significantly greater (P<0.05) and mortality significantly lower (P<0.05) in the presence of plastic filaments alone than those exposed to GABA at a concentration of 10-4 M. However, larvae in the presence of plastic filaments and exposed to GABA showed significantly reduced (P<0.05) swimming behaviour and significantly greater (P<0.05) crawling and settlement behaviours than larvae in the presence of GABA alone or plastic filaments alone. The presence of GABA increased settlement of P. margaritifera larvae onto plastic filaments from 14% in treatments with plastic filaments only, to 25% in the treatment with plastic filaments and GABA. The result of this study showed that GABA has a potential to increase the settlement rate of P. margaritifera larvae in hatcheries. © 2002 Elsevier Science B.V. All rights reserved.
Details
- Title
- The effect of chemical cues on settlement behaviour of blacklip pearl oyster (Pinctada margaritifera) larvae
- Authors
- M S Doroudi (Author) - James Cook UniversityPaul C Southgate (Author) - James Cook University
- Publication details
- Aquaculture, Vol.209(1-4), pp.117-124
- Publisher
- Elsevier BV
- Date published
- 2002
- DOI
- 10.1016/S0044-8486(01)00736-0
- ISSN
- 0044-8486
- Organisation Unit
- School of Science and Engineering - Legacy; Australian Centre for Pacific Islands Research; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99448758702621
- Output Type
- Journal article
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