Escaping peril: perceived predation risk affects migratory propensity
نویسندگان
چکیده
منابع مشابه
Lower predation risk for migratory birds at high latitudes.
Quantifying the costs and benefits of migration distance is critical to understanding the evolution of long-distance migration. In migratory birds, life history theory predicts that the potential survival costs of migrating longer distances should be balanced by benefits to lifetime reproductive success, yet quantification of these reproductive benefits in a controlled manner along a large geog...
متن کاملFemale mouthbrooders adjust incubation duration to perceived risk of predation
The protection of young from predators is an important and costly component of parental care, and this investment should be adjusted to the predation risk for the offspring. Parents are known to fine-tune defence intensity to the perceived need of protection, yet little attention has been paid to individual variation in the duration of brood defence. To optimize parental investment it may be be...
متن کاملEscaping Homelessness 1 Running head: ESCAPING HOMELESSNESS Escaping Homelessness: Anticipated and Perceived Facilitators
One study with two distinct sections was conducted to identify factors facilitating escape from homelessness. In section one, 58 homeless individuals rated possible facilitators of escape (factors they believed would help them become more independent and self-sufficient). In section two, 80 participants who had already exited homelessness rated the same facilitators (factors that would have hel...
متن کاملPredation risk affects reproductive physiology and demography of elk.
Elk (Cervus elaphus) in the Greater Yellowstone Ecosystem alter patterns of aggregation, habitat selection, vigilance, and foraging in the presence of wolves (Canis lupus). Antipredator behaviors like these can reduce predation risk but are also likely to carry costs. Data from five elk populations studied for 16 site years showed that progesterone concentrations (from 1489 fecal samples) decli...
متن کاملPerceived Risk of Predation Affects Reproductive Life-History Traits in Gambusia holbrooki, but Not in Heterandria formosa
Key to predicting impacts of predation is understanding the mechanisms through which predators impact prey populations. While consumptive effects are well-known, non-consumptive predator effects (risk effects) are increasingly being recognized as important. Studies of risk effects, however, have focused largely on how trade-offs between food and safety affect fitness. Less documented, and appre...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Biology Letters
سال: 2015
ISSN: 1744-9561,1744-957X
DOI: 10.1098/rsbl.2015.0466