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#predation risk

3 public questions tagged with this topic.

Predator Prey Model

According to a CSIR-NET study, antelopes reduce predation risk via:

Group formation reduces individual predation risk through several mechanisms. In a larger group, the probability that any one antelope is captured can fall through the dilution effect, while many eyes increase the chance of detecting an approaching predator early. Coordinated vigilance, alarm signals, confusion caused by many moving targets, and collective defense can further reduce attack success. Individuals may also occupy safer central positions, although competition and disease increase with group size. Speed remains important during pursuit, but grouping changes both encounter and captur

Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 14

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PREDATOR

Grouping in prey like antelopes reduces:

Living in a group can lower each antelope's probability of being killed through several mechanisms. More individuals can detect predators earlier, coordinated escape can confuse an attacker, and the dilution effect spreads a given attack risk across many potential targets. Individuals near the center may also reduce their exposure through selfish-herd positioning. A larger aggregation may be easier for predators to notice, so grouping does not necessarily reduce predator attraction, yet per capita mortality can still decline once an attack occurs. The benefit concerns individual risk rather th

Ref: Ecology: From Individuals to Ecosystems, Begon et al., 5th Ed., Ch. 10

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PREDATOR

In a study on antelopes, which graph best represents the male-female predation risk trend?

Graph 4 is the keyed representation of the male-female predation-risk trend in the antelope study. Sex-specific risk can differ because body size, group position, vigilance, habitat use, reproductive condition, and movement affect predator detection and escape. A valid graph must represent the observed direction and relative magnitude for both sexes across the study's independent variable, rather than presuming that one sex is always safer. The workbook contains only graph numbers and does not embed the four candidate plots, so slopes and axes cannot be described reliably. The selection should

Ref: Ecology: From Individuals to Ecosystems, Begon et al., 5th Ed., Ch. 10

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