2019 Fiscal Year Final Research Report
Exploring the evolutionary background by raring planktonic larvae of heteronemerteans that become extremely long
| Project/Area Number |
17K07520
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Keywords | 紐形動物 / 生活史形質 |
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| Outline of Final Research Achievements |
Positive relation between body size and the number of eggs per an ovary was detected among heteronemerteans. Comparisons of body lengths between three major nemertean subgroups (Palaeo-, Hetero-, and Hoplonemertea) suggested that the difference in body plan is not likely related to body length, as Hetero- and Palaeonemertea did not differ significantly, although Hoplonemertea differed significantly between Hetero- and Palaeonemertea.
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| Free Research Field |
系統分類学
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| Academic Significance and Societal Importance of the Research Achievements |
体サイズ規定要因の探求は生物学上興味深い課題の一つであり、多くの研究者が関心を寄せてきた。海産生物における浮遊幼生期や生活史形質の比較研究はこれまでおもに魚類で行われており、無脊椎動物の研究例は少ない。本研究成果は紐形動物における生活史形質の進化的研究における先鞭をつけたという意味で学術的意義が大きく、海洋幼生生態学と進化生態学を結ぶ未開拓の領域へと発展することが期待される。
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