期刊
ROYAL SOCIETY OPEN SCIENCE
卷 4, 期 6, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rsos.161039
关键词
migratory polyphenism; plant-insect interactions; nutrition; grasslands; migration; movement ecology
资金
- National Science Foundation (EAPSI, DDEP)
- Sigma Xi
- P.E.O. Scholar Award
- Chinese Research Grants of Public Welfare Fund for Agriculture [200903021]
- Foundation of Chinese Academy of Sciences [Kscx2-yw-z-1021]
- National Natural Science Foundation of China [31270483]
- National Science Foundation [DEB-0925017, EAR-0746352, DEB-1313693, CHE-1313958]
- Achievement Rewards for College Scientists (Marley-Webb Foundation)
- Achievement Rewards for College Scientists (Johnston Foundation)
- Direct For Biological Sciences
- Division Of Environmental Biology [1313693] Funding Source: National Science Foundation
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1313958] Funding Source: National Science Foundation
For many species, migration evolves to allow organisms to access better resources. However, the proximate factors that trigger these developmental changes, and how and why these vary across species, remain poorly understood. One prominent hypothesis is that poor-quality food promotes development of migratory phenotypes and this has been clearly shown for some polyphenic insects. In other animals, particularly long-distance bird migrants, it is clear that high-quality food is required to prepare animals for a successful migration. We tested the effect of diet quality on the flight behaviour and morphology of the Mongolian locust, Oedaleus asiaticus. Locusts reared at high population density and fed low-N grass (performance-enhancing for this species) had enhanced migratory morphology relative to locusts fed high-N grass. Furthermore, locusts fed synthetic diets with an optimal 1 : 2 protein : carbohydrate ratio flew for longer times than locusts fed diets with lower or higher protein : carbohydrate ratios. In contrast to the hypothesis that performance-degrading food should enhance migration, our results support the more nuanced hypothesis that high-quality diets promote development of migratory characteristics when migration is physiologically challenging.
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