A population of 10 mice grows to 520 in 4 years and stabilizes. Max growth occurs at:
“When population = 260” for a population of 10 mice grows to 520 in 4 years and stabilizes. max growth occurs at. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Population ecology links individual births, deaths, immigration, and emigration to changes in abundance. Per-capita rates determine the direction of change, while density dependence creates feedback when crowding alters survival or reproduction. The remaining alternatives—“At introduction”, “Always constant”, “At 520”—refer to different states, processes, or scales and therefore do not express the same causal relationship. Interpretation must distinguish absolute population change from a per-capita rate and must state the time interval and population boundary. Age structure, dispersal, environmental variation, and delayed responses can all make observed trajectories depart from a simple model. This distinction matters because similar surface patterns can arise through different mechanisms, whereas ecological prediction depends on identifying the mechanism that actually changes rates.
Ref: Campbell Biology, Urry et al., 12th Ed., Unit 8 Ecology