Shell growth and age determination of the brackish water bivalve Corbicula japonica in Lake Shinji, Japan
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- OSHIMA KAZUHIRO
- Department of Ocean Sciences, Tokyo University of Marine Science and Technology
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- SUZUKI NAOKI
- Department of Ocean Sciences, Tokyo University of Marine Science and Technology
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- NAKAMURA MIKIO
- Japan Corbicula Research Institute
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- SAKURAMOTO KAZUMI
- Department of Ocean Sciences, Tokyo University of Marine Science and Technology
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説明
Shell growth and age determination of Corbicula japonica were investigated from samples collected monthly at two sites and field growth experiments from November 1999 to November 2000 in Lake Shinji. Both specimens did not grow in winter when the water temperature was below 11°C, but grew rapidly from spring to early summer when the water temperature rose from 15°C to 30°C, before further growing slowly from summer to autumn after the main breeding period. The monthly marginal growth distribution of the samples indicated that the concentric groove on the shell surface was an annual growth ring. It is concluded that the age of C. japonica in the i-ring group when the shell growth resumed in spring was i+0.5 (i=1, 2, …), because the first true growth ring was formed at 0-2 mm in shell length, which then faded with growth. Lee's phenomenon was observed in the age determination results, and thus the growth coefficient and the asymptotic shell length of the von Bertalanffy growth equation were not estimated from the samples. However, these parameters were estimated from the annual shell length increments of the experimental individuals, which were 0.331/year and 28.2 mm, respectively.
収録刊行物
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- Ｆｉｓｈｅｒｉｅｓ ｓｃｉｅｎｃｅ
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Ｆｉｓｈｅｒｉｅｓ ｓｃｉｅｎｃｅ 70 (4), 601-610, 2004
公益社団法人 日本水産学会
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詳細情報 詳細情報について
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- CRID
- 1390001204429169920
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- NII論文ID
- 130003742964
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- ISSN
- 14442906
- 09199268
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
- OpenAIRE
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- 抄録ライセンスフラグ
- 使用不可