2007 Fiscal Year Final Research Report Summary
A study on factors affecting the decreases in abalone resources by comparing strategies in reproduction among different species
| Project/Area Number |
16380126
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
General fisheries
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KAWAMURA Tomohiko The University of Tokyo, Ocean Research Institute, Associate professor (30323629)
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| Co-Investigator(Kenkyū-buntansha) |
KIMURA Shingo The University of Tokyo, Graduate School of Frontier Sciences, Professor (90202043)
WATANABE Yoshioro The University of Tokyo, Ocean Research Institute, Professor (90280958)
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| Project Period (FY) |
2004 – 2007
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| Keywords | abalone / reproductive stratery / reproductive ecolory / early life ecolory / factors affecting resource decrease |
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| Research Abstract |
The reproductive biology and early life ecology of abalone species (Haliotis discus discus, H. gigantea and H. diversicolor), which inhabit the southern area in Japan, were investigated by field observations and laboratory experiments in this study. Differences in reproductive strategy among abalone species including the northern species H. discus hannai, were examined. Maturation processes of adults, cues for their synchronized spawning, larval dispersion and transport to the settlement places, factors affecting larval settlement, post-larval survival and growth, were especially intensively studied and compared among species and habitats.
Relatively high seawater temperature in winter since 1990's is suggested as the main factor increasing natural recruitment of H. discus hannai. However, young-of-the-year juveniles encountered the low winter seawater temperatures when they grew up to 3-7 mm SL several months after they were born. The annual recruitment level appears to be influenced also by earlier post-larval occurrence and mortality, which are strongly affected by the adult density. Dense patches of males and females appear to be important for fertilization success and post-larval survival in abalone species. For H. discus hannai, relatively high adult densities guaranteed larval occurrence and subsequent post-larval survival. On the other hand, adult densities are generally much lower in southern large species than in H. discus hannai and H. diversicolor, which is considered to be the major factor causing their low recruitments. The environmental deteriorations for larval settlement and post-larval survival were also suggested to be important factors affecting low natural recruitments of the southern abalone species. Laboratory experiments suggested that the small abalone H diversicolor has greater fertilization success than larger species due to differences in spawning behavior and gamete ability to fertilize.
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Research Products
(85 results)
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[Journal Article] Survival, growth and recruitment of abalone Haliotis diversicolor in Sagami Bay, Japan2008
Author(s)
Onitsuka, T., Kawamura, T., Horii, T., Takiguchi, N. and Watanabe, Y.
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Journal Title
Journal of shellfish Research 〔掲載確定〕 (In press)
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Overwinter mortality of young-of-the-year Ezo abalone (Haliotis discus hannai) in relation to seawater temperature on the North Pacific coast of Japan2008
Author(s)
Takami, H., Saido, T., Endo, T., Musashi, T., Noro, T. and Kawamura, T.
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Journal Title
Marine Ecology Progress Series 〔掲載確定〕 (In press)
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Survival, growth and recruitment of abalone Haliotis diversicolor in Sagami Bay, Japan2008
Author(s)
Onitsuka, T., Kawamura, T., Horii, T., Takiguchi, N., Watanabe, Y.
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Journal Title
Journal of shellfish Researc (in press)
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Effects of winter water temperature on the survival of young-of-the-year Ezo abalone, Haliotis discus hannai2008
Author(s)
Takami, H., Saido, T., Endo, T., Noro, T., Musashi, T., Kawamura, T.
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Journal Title
Bulletin of Fisheries Research Agency (in press)
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Overwinter mortality of young-of-the-year Ezo abalone (Haliotis discus hannai) inrelation to seawater temperature on the North Pacific coast of Japan2008
Author(s)
Takami, H., Saido, T., Endo, T., Musashi, T., Noro, T., Kawamura, T.
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Journal Title
Marine Ecology Progress Series (in press)
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Identification of juvenile abalone Haliotis diversicolor based on the number of open and sealed respiratory pores2007
Author(s)
Onitsuka, T., Kawamura, T., Horii, T., Hamaguchi, M., Ohashi, S., Takiguchi, N. and Watanabe, Y.
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Journal Title
Fisheries Science 73
Pages: 995-1000
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Trophic structure of benthic community of abalone (Haliotis diversicolor) habitat in Sagami Bay, Japan2007
Author(s)
Won, N-I., Kawamura, T., Onitsuka, T, Hayakawa, J., Watanabe, S., Horii, T., Takami, H. and Watanabe, Y.
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Journal Title
Fisheries Science 73
Pages: 1123-1136
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Synchronized spawning of an abalone Haliotis diversicolor, triggered by typhoonevents in Sagami Bay, Japan2007
Author(s)
Onitsuka, T., Kawamura, T., Horii, T., Takiguchi, N., Takami, H. and Watanabe, Y.
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Journal Title
Marine Ecology Progress Series 351
Pages: 129-138
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Dvalue of benthic diatoms for post-larval abalone Haliotis diversicolor, associated with the feeding transitions2007
Author(s)
Onitsuka, T., Kawamura, T., Ohashi, S., Horii, T., Watanabe, Y.
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Journal Title
Fisheries Science 73
Pages: 295-302
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Identification of juvenile abalone Haliotis diversicolor based on the number of open and sealed respiratory pores2007
Author(s)
Onitsuka, T., Kawamura, T., Horii, T., Hamaguchi, M., Ohashi, S., Takiguchi, N., Watanabe, Y.
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Journal Title
Fisheries Science 73
Pages: 995-1000
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Trophic structure of benthic community of abalone (Haliotis diversicolor) habitat in Sagami Bay, Japan2007
Author(s)
Won, N-I., Kawamura, T., Onitsuka, T, Hayakawa, J., Watanabe, S., Horii, T. Takami, H., Watanabe, Y.
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Journal Title
Fisheries Science 73
Pages: 1123-1136
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Synchronized spawning of an abalone Haliotis diversicolor, triggered by typhoonevents in Sagami Bay, Japan2007
Author(s)
Onitsuka, T., Kawamura, T., Horii, T., Takiguchi, N., Takami, H., Watanabe, Y.
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Journal Title
Marine Ecology Progress Series 351
Pages: 129-138
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Oceanographic environment and larval transport of southern large abalone species on the western coast of Miura Peninsula2007
Author(s)
Miyake, Y., Kimura, S., Kawamura, T., Horii, T., Itoh, S., Kim, H.
Organizer
Annual meeting of The Japanese Society of Fisheries Science
Place of Presentation
Hakodate
Year and Date
2007-09-27
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Won, N-I. and Kawamura, T., Early survival process and Factors affecting mortality in Ezo abalone2007
Author(s)
Takami, H., Noro, T., Musashi, T., Saido, T., Endo, T., Oshino, A, Sasaki, R., Fukazawa, H.
Organizer
Annual meeting of The Japanese Society of Fisheries Science
Place of Presentation
Tokyo
Year and Date
2007-03-30
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Early survival process and Factors affecting mortality in Ezo abalone2007
Author(s)
Takami, H., Noro, T., Musashi, T., Saido, T., Endo, T., Oshino, A, Sasaki, R., Fukazawa, H., Won, N-I. and Kawamura, T.
Organizer
Annual meeting of The Japanese Society of Fisheries Science
Place of Presentation
Tokyo
Year and Date
2007-03-30
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Estimation of ontogenetic changes in feeding habits of wild Ezo abaloneand small abalone by stable isotope analyses2007
Author(s)
Won, N-I., Kawamura, T., Takami, H., Onitsuka, T., Hayakawa, J., Horii, T., Watanabe, Y.
Organizer
Annual meeting of The Japanese Society of Fisheries Science
Place of Presentation
Shizuoka
Year and Date
2007-03-30
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Feeding habit of post-larval and early juvenile abalone Haliotis discus hannai in the field 222006
Author(s)
Takami, H., Saido, T., Endo, T., Kawamura, T.
Organizer
Sixth International Abalone Symposium, Biology, Fisheries and Culture
Place of Presentation
Puerto Varas, Chile
Year and Date
20060200
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Larval transport of southern large abalone species on the western coast of Miura Peninsula2006
Author(s)
Miyake, Y., Kawamura, T., Kimura, S., Horii, T., Itoh, S., Kim, H.
Organizer
Annual meeting of The Japanese Society of Fisheries Oceanography
Place of Presentation
Yokohama
Year and Date
2006-11-28
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Effects of sediment on larval settlement of small abalone2006
Author(s)
Onitsuka, T., Kawamura, T., Ohashi, S., Iwanaga, S., Horii, T., Watanabe, Y.
Organizer
Annual meeting of The Japanese Society of Fisheries Science
Place of Presentation
Kochi
Year and Date
2006-03-30
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Oogenetic cycle of the Japanese abalone, Haliotis discus hannai during a spawning season2006
Author(s)
Fukazawa, H., Takami, H., Kawamura, T., Watanabe, Y.
Organizer
Sixth International Abalone Symposium, Biology, Fisheries and Culture
Place of Presentation
Puerto Varas, Chile
Year and Date
2006-02-22
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Estimation of larval swimming period in Haliotis discus hannai2006
Author(s)
Takami, H., Oshino, A., Sasaki, R., Fukazawa, H. and Kawamura, T.
Organizer
Sixth International Abalone Symposium, Biology, Fisheries and Culture
Place of Presentation
プエルトバラス(チリ)
Year and Date
2006-02-21
Description
「研究成果報告書概要(和文)」より
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[Presentation] Estimation of larval swimming period in Haliotis discus hannai2006
Author(s)
Takami, H., Oshino, A., Sasaki, R., Fukazawa, H., Kawamura, T.
Organizer
Sixth International Abalone Symposium, Biology, Fisheries and Culture
Place of Presentation
Puerto Varas, Chile
Year and Date
2006-02-21
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Natural spawning cues for abalone species and effects of individual distance between a male and a female on the fertilization rate of eggs2005
Author(s)
Kawamura, T., Onitsuka, T., Clarke, CB., Fukazawa, H., Horii, T., Takami, H.
Organizer
Annual meeting of The Japanese Society of Fisheries Oceanography
Place of Presentation
Hiroshima
Year and Date
2005-12-04
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Maturation and spawning of small abalone on the coast of Nagai, Miura Peninsula2005
Author(s)
Onitsuka, T., Shirafuji, N., Kawamura, T., Horii, T., Takiguchi, N., Watanabe, Y.
Organizer
Annual meeting of The Japanese Society of Fisheries Science
Place of Presentation
Tokyo
Year and Date
2005-04-03
Description
「研究成果報告書概要(欧文)」より
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[Presentation] The feeding habit of juvenile Ezo abalone in Kadonohama Bay, Iwate2005
Author(s)
Takami, H., Saido, T., Endo, T., Kuwahara, H., Motomatu, K., Kawamura, T.
Organizer
Annual meeting of The Japanese Society of Fisheries Science
Place of Presentation
Tokyo
Year and Date
2005-04-03
Description
「研究成果報告書概要(欧文)」より
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