Related topics: fish · birds · insects · predators

Researchers classify lesion from trichomonosis in birds

Oral avian trichomonosis is an infection caused by parasitic protozoon Trichomonas gallinae. By infecting mainly the oropharyngeal and crop mucosa, the severe lesions can cause the death of the birds due to suffocation or ...

Penguin poo helps solve puzzles

Blue cod has been identified as making up a large proportion of the yellow-eyed penguin (hoiho) diet using a novel approach published by University of Otago researchers.

Understanding the risks of rodent poisons to birds of prey

Maureen Murray, V03, director of Tufts Wildlife Clinic and clinical associate professor at Cummings School of Veterinary Medicine, has been studying rodenticide exposure in birds of prey for over a decade. Exposure to rodenticides ...

Climate change recasts the insect communities of the Arctic

Through a unique collaboration, researchers at the University of Helsinki have exposed major changes taking place in the insect communities of the Arctic. Their study reveals how climate change is affecting small but important ...

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Predation

In ecology, predation describes a biological interaction where a predator (an organism that is hunting) feeds on its prey, (the organism that is attacked). Predators may or may not kill their prey prior to feeding on them, but the act of predation always results in the death of the prey. The other main category of consumption is detritivory, the consumption of dead organic material (detritus). It can at times be difficult to separate the two feeding behaviors, for example where parasitic species prey on a host organism and then lay their eggs on it for their offspring to feed on its decaying corpse. The key characteristic of predation however is the predator's direct impact on the prey population. On the other hand, detritivores simply eat what is available and have no direct impact on the "donor" organism(s).

Selective pressures imposed on one another has led to an evolutionary arms race between prey and predator, resulting in various antipredator adaptations.

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