• Journal of Life Science
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• v.19 no.8
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• pp.1003-1008
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• 2009

Abalone (genus Haliotis) is a woody species with a long life span that is primarily distributed throughout the world, including Asia. This species is regarded as a very important marine gastropod mollusk in Korea and China, and also in food industries around the world. We evaluated a representative sample of the five species with nuclear ribosomal DNA internal transcribed spacer sequences (ITS) to estimate genetic relationships within the genus. Aligned nucleotide sequences of the length of the 5.8S subunit of all taxa of Haliotis were found to constant of 160 bp nucleotides. However, aligned nucleotide sequences of the length of ITS1 were varied within genus Haliotis, varying from 272 in H. diversicolor aquatilis to 292 in H. discus hannai. Aligned nucleotide sequences of the length of ITS2, especially, vary from 722 in H. diversicolor aquatilis to 752 in H. sieboldii. Total alignment length is 763 positions, of which 78 are parsimony-informative, 57 variable but parsimony-uninformative, and 459 constant characters. H. discus hannai was similar to H. discus, while H. diversicolor aquatilis was more distinct. ITS analysis may be useful in germ-plasm classification several taxa of genus Haliotis.

• 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.

• Development and Reproduction
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• v.16 no.2
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• pp.145-153
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• 2012

Reproductive cycle of the small abalone, Haliotis diversicolor aquatilis which collected from Seong-san coastal waters, Jeju, Korea were investigated monthly from May 2006 to April 2007 using histological methods. The gonad index (GI) of male and female reached a peak in June ($70.72{\pm}5.20$) and July ($55.38{\pm}11.73$). Subsequently, GI decreased in September (Male, $21.27{\pm}2.91$; Female, $27.75{\pm}4.76$) and increased again in October (Male, $48.49{\pm}8.39$; Female, $51.36{\pm}7.47$), respectively. After that, GI gradually decreased. In March 2007, GI was reached the minimum (Male, $8.46{\pm}0.57$; Female, $9.69{\pm}0.88$). The reproductive cycle of female and male could be divided into six successive stages ; In female, multiplication (February and May), growing (February to May), mature (April to July), partial spawning (May to November), degenerating (October to December) and recovery (September to October and December to February) stage. In male, multiplication (February and May), growing (March to May), mature (April to July), spawning (June to November), degenerating (November to February) and recovery (September to February) stage. The yellowish granular cells have been observed more in multiplication, growing, degenerating, and recovery stage than mature and partial spawning stage. The results of GI and histological observations of the gonads suggested that this species could be presumed as multi- spawning characteristics more two times in spawning seasons.