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野生アメリカザリガニの胃石およびキチン質基質の所持とその季節性
https://doi.org/10.18881/00000211
https://doi.org/10.18881/000002116563a265-1683-45ef-b4e8-a8bf5313077b
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
v11p11-15.pdf (2.2 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper_default(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2015-03-31 | |||||
| タイトル | ||||||
| タイトル | 野生アメリカザリガニの胃石およびキチン質基質の所持とその季節性 | |||||
| 言語 | ja | |||||
| タイトル | ||||||
| タイトル | Seasonality of gastrolith and chitin matrix possession of wild red swamp crayfish. | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | red swamp crayfish | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | gastrolith | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | chitin matrix | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | mol | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | pellet | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | cormorant | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | departmental bulletin paper | |||||
| ID登録 | ||||||
| ID登録 | 10.18881/00000211 | |||||
| ID登録タイプ | JaLC | |||||
| 著者 |
三橋, 萌樹
× 三橋, 萌樹× 下岡, ゆき子 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Crayfish have “gastroliths” in which calcium is deposited transiently during the molt cycle from the cuticle. In red swamp crayfish, amorphous calcium carbonate is embedded in an organic matrix composed mainly of chitin. Thus the seasonality of molting will strongly affect the number and possession rate of gastroliths in crayfish. In this study, we captured 405 wild red swamp crayfish in May-November 2014 at a small pond and stream in Tsuzuki central park, Yokohama using a net for capturing crab or a fishing line with dried squid, and analyzed the seasonality of number of gastroliths in their stomach, degree of calcification of the gastrolith in relation with the molting cycle. Among 405 crayfish, only 48 individuals had one or two gastroliths, in a biforked stomach. Gastroliths were found only in May-July and October-November, and large gastroliths were found from the individuals just before and after the molt. We also found one or two chitin matrix from the stomach of all the individuals who didn’t have gastroliths. Red swamp crayfish are important food item of fish-eating birds such as great cormorant, and their gastroliths and chitin matrix are found in the birds’ pellets. Here we propose a formula to estimate the intake of crayfish by birds using the number of gastroliths and chitin matrix found in birds’ pellets. |
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| 書誌情報 |
帝京科学大学紀要 en : Bulletin of Teikyo University of Science 巻 11, p. 11-15, 発行日 2015-03-31 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 18800580 | |||||
