Theoretical study of evolution of egg size and early life history of aquatic organisms

水生生物卵大小演化及早期生活史的理论研究

• 批准号: 10640607
• 负责人: NISHIMURA Kinya
• 金额: $ 2.11万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640607/
• 关键词: life history; cannibalism; larvae; pelagic; survival game; prey utilization; expansion of violence

Larvae of several ocean pelagic fish species, such as tunas and marlins, have been known to have large jaws, but the ecological significance of this unique morphological character has been hardly analyzed in evolutionary ecology. Pelagic spawners produce small and nutrition-poor ova, and spawning and nursery grounds of the open ocean migratory fishes are oligotrophic. We hypothesize that cannibalism would be a possible life style in the larval period and the large mouth gape would be an adaptive morphological characteristic for a cannibal in the oligotrophic pelagic environment. We showed that mouth gape size of the open ocean pelagic spawners is significantly larger than that of offshore/coastal pelagic spawners. A mathematical model demonstrated that cannibalism would tend to evolve in high sea environment. Our findings suggest an evolutionary pattern of cannibalism trait in the larval stage of pelagic fishes.

金枪鱼和马林鱼等几种海洋中上层鱼类的幼体都有大颚，但这种独特的形态特征的生态学意义在进化生态学中几乎没有得到分析。中上层产卵鱼产生的卵子小且营养不良，公海洄游鱼类的产卵场和育苗场是贫营养的。我们推测，食人将是一种可能的生活方式，在幼虫期和大嘴将是一个适应性的形态特征，在贫营养的浮游环境中的食人。我们发现，开口张开的远洋远洋产卵器的大小是显着大于近海/沿海远洋产卵器。一个数学模型表明，在公海环境中，同类相食会趋于进化。我们的研究结果表明，在中上层鱼类的幼体阶段的同类相食性状的进化模式。

项目成果

Nishimura,K.: "Evolution of cannibalism in the larval stage of pelagic fish."Evolutionary Ecology. 13. 191-209 (1999)

Nishimura,K.：“远洋鱼类幼体阶段同类相食的进化。”进化生态学。

星野昇: "「魚類の初期生活史と卵サイズの進化」in「水生動物の卵サイズ・生活史の変異、種分化の生物学」後藤晃,井口恵一郎編"海游舎(現時点で未定). (2001)

Noboru Hoshino：“后藤晃和井口敬一郎编辑的‘水生动物的卵大小和生活史，物种形成生物学’中的‘鱼类的早期生活史和卵大小的进化’”海游社（目前未定）（2001年）。 ）

Kinya Nishimura: "Evolution of cannibalism in the larval stage of pelagic fish"Evolutionary Ecology. 13. 191-209 (1999)

Kinya Nishimura：“远洋鱼类幼体阶段的同类相食的进化”，《进化生态学》。

Nishimura, K.and Hoshino, N.: "Evolution of cannibalism in the larval stage of pelagic fish."Evolutionary Ecology. Vol.13. 191-209 (1999)

Nishimura, K. 和 Hoshino, N.：“远洋鱼类幼虫阶段同类相食的进化。”进化生态学。

Hoshino, N.and Nishimura, K.: "Evolution of early life history and egg size of fish."In "Egg size and life history variation, and speciation of aquatic organisms" eds. Goto, A.and Iguchi, K.Kaiyu-sha (in Japanese). (2001)

Hoshino, N. 和 Nishimura, K.：“鱼类早期生命史和卵大小的进化。”在“卵大小和生活史变异以及水生生物的物种形成”编辑中。