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Metamorphosis Induction of the Dog Conch Strombus canarium (Gastropoda: Strombidae) Using Cues Associated with Conch Nursery Habitat


Citation

Cob, Z. C. and Arshad, Aziz and Bujang, Japar Sidik and Muda, W. L. W. and Ghaffar, M. A (2010) Metamorphosis Induction of the Dog Conch Strombus canarium (Gastropoda: Strombidae) Using Cues Associated with Conch Nursery Habitat. Journal of Applied Sciences, 10 (8). pp. 628-635. ISSN 1812-5654

Abstract / Synopsis

Strombus canarium is a commercially important gastropod that has great potential for advancement into aquaculture. In this study, the metamorphosis response of Strombus canarium larvae to various metamorphosis cues associated with conch nursery habitat and to KCl and GABA, were tested. Bioassays were run as static, no choice experiment and adopting a continuous exposure approach. Strombus canarium larvae showed strong metamorphosis responses when sediment (i.e., conch nursery habitat sediment/SD-NU) and detrital substrata (i.e., Thalassia detritus leachate/T-LC) from their nursery habitat were used (p<0.05). There was no metamorphosis in treatments using sterilized conch nursery habitat sediment (SD-ST) and sediment taken from outside conch nursery habitat (SD-OT). Experiments using fresh macrophyte blades of Enhalus acoroides (EA), Thalassia hemprichii (TH), Halophila ovalis (HA) and Ulva (UL) and adult conditioned seawater (SD-SW) also showed negative respond. Conch larvae demonstrate active habitat selection during metamorphosis and no spontaneous metamorphosis was observed. Settlement in S. canarium is associative in nature where epibionts associated with conch nursery habitat could be the cue for the metamorphosis. However, the specific epibionts/inducers and mechanisms underlining the process were not studied and therefore are subjected to more detailed investigation. The use of KCl was comparable with treatments using natural inducers (SD-NU and T-LC), thus was suggested for application in hatchery spat production of the species.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture
DOI Number: 10.3923/jas.2010.628.635
Publisher: Asian Network for Scientific Information
Keywords: Dog conch, gastropod, metamorphosis, settlement cues, veliger
Depositing User: Norhazura Hamzah
Date Deposited: 11 Apr 2011 12:23
Last Modified: 03 Nov 2015 12:46
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.3923/jas.2010.628.635
URI: http://psasir.upm.edu.my/id/eprint/11489
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