Phenotypic Plasticity in a Food Web
Project/Area Number |
19370005
|
Research Category |
Grant-in-Aid for Scientific Research (B)
|
Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Ecology/Environment
|
Research Institution | Hokkaido University |
Principal Investigator |
NISHIMURA Kinya Hokkaido University, 大学院・水産科学研究院, 准教授 (30222186)
|
Project Period (FY) |
2007 – 2010
|
Project Status |
Completed (Fiscal Year 2010)
|
Budget Amount *help |
¥14,560,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥3,360,000)
Fiscal Year 2010: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2009: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2008: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2007: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
|
Keywords | 表現型可塑性 / 共食い / 防御 / 攻撃 / 相対成長 / 反応基準 / 食物網 / 表現型 / 可塑性 / 間接効果 / 誘導防御 / 抑制 / 越冬幼生 |
Research Abstract |
Here, using a simple food chain consisting of a top predator (dragonfly larvae), an intermediate predator (salamander larvae), and frog tadpoles as prey, we show that the presence of dragonfly risk cues substantially modifies the intensity of antagonistic morphological plasticity in both amphibians. In the absence of dragonflies, tadpoles produced bulgier bodies in response to salamanders, and salamanders responded to this defense by enlarging their gape size. However, in the presence of dragonfly risk cues, the expression of both antagonistic traits was significantly reduced because tadpoles and salamanders produced phenotypes that are more effective against dragonfly predators.
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Report
(6 results)
Research Products
(38 results)