2013年7月
Higher risk of fatality by predatory attacks in earlier ontogenetic stages of modern Nautilus pompilius in the Philippines: evidence from the ontogenetic analyses of shell repairs
LETHAIA
- ,
- 巻
- 46
- 号
- 3
- 開始ページ
- 317
- 終了ページ
- 330
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1111/let.12010
- 出版者・発行元
- WILEY-BLACKWELL
The shell repair scars of modern Nautilus pompilius in the Philippines presumably due to sub-lethal predatory attacks were examined throughout ontogeny ranging from hatching to maturity, revealing the higher risk of fatality in earlier ontogenetic stages. The examinations throughout ontogeny demonstrate that: (1) sub-lethal predatory attacks by other organisms have no preferred position through ontogeny; (2) the sizes of shell repair scars are similar throughout ontogeny and, therefore, the width and length of shell repair scars relative to shell diameter decrease from hatching towards maturity; and (3) the proportion of sub-lethal predatory attacks within 10mm increments of shell diameter are similar irrespective of shell diameter or decrease approaching maturity. The numbers of the irregular, radiating, black shell repair scars, indicating injury to the soft parts at shell breakage, decrease at a diameter >80mm and none were found at <56mm in shell diameter. Furthermore, the rarity of juvenile trapping data might be related to the higher fatality from predatory attacks in earlier ontogenetic stages, providing crucial information for the conservation of N.pompilius.
- リンク情報
- ID情報
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- DOI : 10.1111/let.12010
- ISSN : 0024-1164
- Web of Science ID : WOS:000320589500004