Be Loved, Be Prey, Be Eaten
نویسندگان
چکیده
منابع مشابه
Climate change enhances the negative effects of predation risk on an intermediate consumer.
Predators are a major source of stress in natural systems because their prey must balance the benefits of feeding with the risk of being eaten. Although this 'fear' of being eaten often drives the organization and dynamics of many natural systems, we know little about how such risk effects will be altered by climate change. Here, we examined the interactive consequences of predator avoidance an...
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Predators that have learned to associate warning coloration with toxicity often continue to include aposematic prey in their diet in order to gain the nutrients and energy that they contain. As body size is widely reported to correlate with energetic content, we predicted that prey size would affect predators' decisions to eat aposematic prey. We used a well-established system of wild-caught Eu...
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We utilized a long-term data base collected over a broad geographic range to examine predator size prey size relationships for 18 species of marine fish predators from continental shelf waters off the northeast US coast. Regression analysis was used to illustrate interspecific variation in ontogenetic patterns of prey size use, gape allometries, and ratio-based trophic niche breadths. Sizebased...
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Information on diet composition, daily energy expenditure, energy storage and the utilization of energy in the prey are important factors when evaluating the food consumption of minke whales (Balaenoptera acutorostrata) during their summer stay in northern waters. The purpose of the present study was in this context to obtain information on the digestible energy (DE) of different prey selected ...
متن کاملFactors influencing the chemical release of prey attack in newborn snakes.
Attack behavior of inexperienced garter snakes to water extracts of normally eaten prey was investigated. Since eliminating vision and olfaction in newborn snakes did not alter response to chemical cues, Jacobson's organ is considered to be the receptor most involved. Slight variations in age and concentration did not affect potency of an extract, but, over a wider range of concentration, the r...
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