Induction of larval settlement and metamorphosis in the donkey-ear abalone,Haliotis asinina Linnaeus,by chemical cues |
| |
Authors: | Gapasin Rolando SJ Polohan Bernice B |
| |
Institution: | 1. Aquaculture Department, Southeast Asian Fisheries Development Center (SEAFDEC), Tigbauan, 5021 Iloilo, Philippines
|
| |
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. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|