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- Title
Induction of larval settlement and metamorphosis in the donkey-ear abalone, Haliotis asinina Linnaeus, by chemical cues.
- Authors
Gapasin, Rolando S.J.; Polohan, Bernice B.
- Abstract
The effects of the chemical inducers, gamma-aminobutyric acid (GABA) and potassium chloride (KCl), on the larval settlement and metamorphosis of the donkey-ear abalone, Haliotis asinina, was investigated. H. asinina larvae (5–6 h post-hatch) were exposed to a range of GABA (0.125–2.00 μM) and KCl (1.00–12.00 mM) concentrations for 72 h. Results of the dose response experiments showed that settlement and metamorphosis vary according to the dose levels of the inducer compounds. Under controlled laboratory conditions, 0.45–0.50 μM and 6.0 mM seemed to be the optima for GABA and KCl, respectively, as these concentrations elicited the greatest number of postlarvae that metamorphosed, settled or survived. However, GABA generally promoted better attachment and metamorphic response as well as survival than KCl in H. asinina postlarvae.
- Subjects
METAMORPHOSIS; CHEMICAL inhibitors; POTASSIUM chloride; ABALONES; LARVAL ecology; DEVELOPMENTAL biology; AQUATIC biology
- Publication
Hydrobiologia, 2004, Vol 519, Issue 1-3, p9
- ISSN
0018-8158
- Publication type
Article
- DOI
10.1023/B:HYDR.0000026480.00928.5a