| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2010: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Research Abstract |
Dragonflies occurring in rice fields, like all other freshwater macroinvertebrates of rice fields, require certain life cycle traits to cope with or circumvent the temporary nature of their habitats. Dragonfly larvae may survive long periods of drought burrowed in wet soil or hidden in wet detritus; drought survival in egg stage is common in species of Lestes and others. However, avoiding drought by spending the dry period as adults may be the most common habit in the Odonata of temporary waters, particularly in the tropics (Suhling et al. 2014/in press). This requires rapid larval development.
This study derives from experiment with a micro-paddy lysimeter and laboratory experiment about Sympetrum spp. in the rice fields. Data on survival rate for Sympetrum spp. are different between early middle drainage and postpone drainage. Understanding the relationship between middle drainage and survival rate of larvae is supposed to aid rice field-dwelling species conservation.
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