Aphids suck: Invasive aphid found on Danish apple trees

The spirea aphid, Aphis spiraecola, an invasive pest, has been discovered for the first time in Denmark by University of Copenhagen researchers. The extent of its current distribution remains unknown, but in time, it could ...

Using water fleas, researchers investigate adaptive evolution

Researchers from The University of Texas at Arlington resurrected the preserved eggs of a shrimp-like crustacean to examine long-standing questions about adaptive evolution, reporting the results in the journal Proceedings ...

New research on predator-prey relationships

One of the reasons that prey species migrate is to avoid predators over long time scales, this ultimately has a powerful effect on the balance of predator and prey in a given ecosystem. This is especially the case if the ...

Nutrient-rich water is heaven for disease-spreading mosquitoes

When mosquito eggs hatch in nutrient-rich water, the mosquitoes are larger and they can also fly further. That is the first conclusion of a study from by the Netherlands Center for One Health (NCOH) by PhD-student Sam Boerlijst.

page 1 from 40

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 its prey and the eventual absorption of the prey's tissue through consumption. Other categories of consumption are herbivory (eating parts of plants) and detritivory, the consumption of dead organic material (detritus). All these consumption categories fall under the rubric of consumer-resource systems. It can often be difficult to separate our various types of feeding behaviors. For example, parasitic species prey on a host organism and then lay their eggs on it for their offspring to feed on it while it continues to live or on its decaying corpse after it has died. The key characteristic of predation however is the predator's direct impact on the prey population. On the other hand, detritivores simply eat dead organic material arising from the decay of dead individuals and have no direct impact on the "donor" organism(s).

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

The unifying theme in all classifications of predation is the predator lowering the fitness of its prey, or put another way, it reduces its prey's chances of survival, reproduction, or both. Ways of classifying predation surveyed here include grouping by trophic level or diet, by specialization, and by the nature of the predator's interaction with prey.

This text uses material from Wikipedia, licensed under CC BY-SA