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  1. 139 大気海洋研究所
  2. 80 国際沿岸海洋研究センター
  3. Coastal Marine Science
  4. 29
  5. 2
  1. 0 資料タイプ別
  2. 30 紀要・部局刊行物
  3. Coastal Marine Science
  4. 29
  5. 2

Otolith strontium : calcium ratios in a freshwater stingray, Himantura signifer Compagno and Roberts, 1982, from the Chao Phraya River, Thailand

https://doi.org/10.15083/00040812
https://doi.org/10.15083/00040812
17d8f66d-27f1-4468-827f-b06091c219a1
名前 / ファイル ライセンス アクション
KJ00004186963.pdf KJ00004186963.pdf (703.0 kB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2007-04-05
タイトル
タイトル Otolith strontium : calcium ratios in a freshwater stingray, Himantura signifer Compagno and Roberts, 1982, from the Chao Phraya River, Thailand
言語
言語 eng
キーワード
主題Scheme Other
主題 Himantura signifier
キーワード
主題Scheme Other
主題 freshwater stingray
キーワード
主題Scheme Other
主題 otolith
キーワード
主題Scheme Other
主題 Sr : Ca ratio
キーワード
主題Scheme Other
主題 migration
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
ID登録
ID登録 10.15083/00040812
ID登録タイプ JaLC
著者 Otake, Tsuguo

× Otake, Tsuguo

WEKO 139682

Otake, Tsuguo

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Ishii, Toshiaki

× Ishii, Toshiaki

WEKO 139683

Ishii, Toshiaki

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Tanaka, Sho

× Tanaka, Sho

WEKO 139684

Tanaka, Sho

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著者所属
著者所属 International Coastal Research Center, Ocean Research Institute, The University of Tokyo
著者所属
著者所属 Laboratory for Radioecology, National Institute of Radiological Sciences
著者所属
著者所属 Department of Marine Scienes and Technology, Tokai University
抄録
内容記述タイプ Abstract
内容記述 Otolith microchemistry was examined in a freshwater stingray, Himantura signifer, collected from a freshwater region of the Chao Phraya River, Thailand. Otoliths of H. gerarudii and H. imbricata from the estuary at the mouth of the Chao Phraya River, and H. imbricata from the sea adjacent to the river mouth were also examined. Otolith Ca concentration was almost constant among the three species, regardless of their habitat environments. In contrast, Sr concentration and the Sr : Ca ratio differed considerably among the species, those of the freshwater species being at the lowest levels and that of the marine population of H. imbricata the highest. Intraspecific variation in Sr concentrations and Sr : Ca ratios found in H. imbricata from estuarine and marine environments suggested that those levels varied according to the habitat. Otolith Sr concentrations and Sr : Ca ratios of male freshwater stingrays increased with body growth, whereas those of female otoliths decreased temporarily to the lowest level in 250-300 mm disk width (mature) specimens. The findings suggested that H. signifer from freshwater regions enter a brackish or seawater environment at some time in their life history. The marked fluctuations in Sr concentration and Sr : Ca ratio in female otoliths may be related to presumed reproductive behavior, such as ceasing migration across a saline boundary during the reproductive period and giving birth in a freshwater region of the river, or may have been affected by changes in physiology and elemental metabolism associated with reproduction.
書誌情報 Coastal marine science

巻 29, 号 2, p. 147-153, 発行日 2005-01-31
ISSN
収録物識別子タイプ ISSN
収録物識別子 13493000
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA11957899
フォーマット
内容記述タイプ Other
内容記述 application/pdf
日本十進分類法
主題Scheme NDC
主題 452
出版者
出版者 International Coastal Research Center, Ocean Research Institute, the University of Tokyo
出版者別名
東京大学海洋研究所国際沿岸海洋研究センター
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