• Journal of Aquaculture
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• v.11 no.4
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• pp.505-512
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• 1998

This study was conducted to investigate the effects of three different formulated diets and macroalgae(Undaria) on growth and body comoposition among juvenile Haliotis discus, H. sieboldii and H. discus hannail. Three replicate groups among the three species abalones average weighing 0.31g were fed one of one experimental diet, two commercial diets and Undaria for 9 weeks. The three formulated diets produced significantly (P<0.05) greated body and shell growth than Undaria within same abalone species. Survival rates (97~99%) of H. discus and H. sieboldii were higher than that (74~77%) of H. discus hannai. Whereas different diets had no significantly (P>0.05) distincitive effect on survival within each three different abalone species. Moisture of abalone soft body in final stage reduced compared to those of abalone in initial stage in H. discus and H. discus hannai. Regardless of diet, abalone soft body revealed significantly (P<0.05) increased protein and decreased ash at the end of feeding trial in all three abalone species. This study indicate that all three different formulated diets used in this experiment could be a practical diet in three abalone species.

• Animal Systematics, Evolution and Diversity
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• v.21 no.2
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• pp.157-169
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• 2005

Three species of gammaridean amphipods are reported from four cultured abalones in Jeju Island, Korea. These amphipods are Ampithoe uolida Smith, Elasmopus rapax Costa, and Melita rylovae Bulycheva which were found from the abalones Haliotis discus hannai Ino, H. discus Reeve, H. diversicolor aquatilis Reeve, and H. sieboldii Reeve. Elasmopus rapax, a new record to Korean fauna, is described in detail. Other two gammaridean species are briefly described with diagnostic characters. These amphipods and abalones revealed no species-specific relationship and are considered to be simple and accidential associates.