2015 Fiscal Year Final Research Report
Behavioural physiological analyses of ohototaxis of the marbled crayfish
| Project/Area Number |
25440165
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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 |
Animal physiology/Animal behavior
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| Research Institution | Yamagata University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 生得的行動 / 習得的行動 / 走性 / 定位 / 光 / 学習 / 可塑性 |
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| Outline of Final Research Achievements |
Phototaxis is a one of essential elements for innate behaviour. Phototactic behaviours are observed from prokaryotes to amphibian and basic form of orientation. marbled crayfish are shown phototaxis in which sign reversed from negative to positive depending on external light conditionings. LD animals reared with 12L/12D light cycle showed negative phototaxis during day-time and positive phototaxis during night-time. DD animals reared under constant dark conditioning showed positive phototaxis during day-time. Injection of serotonin caused a reversed positive phototaxis in LD animals while dopamine caused a reversed negative phototaxis in DD animals. Injection of serotonin 5HT1 receptor antagonist blocked the reverse of phototaxis from negative to positive, while dopamine DA1 receptor antagonist blocked the reverse from positive to negative. Serotonin mediates positive phototaxis owing decrease in cAMP level while dopamine mediated negative phototaxis owing increase in cAMP level.
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| Free Research Field |
行動生理学
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