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Chapter 14

Intraspecific Population Regulation


Ted Dolzine

High density is stressful to populations

High density effects the organisms stress by not having enough food and room to survive.

This stress results in decrease of births and increased infant mortality.

The hormone pheromone is released by an animal that influences the behavior of others of the same species. Which this effects there stress level.

Dispersal may or may not be density-dependent

If dispersal is higher than there is less chance of inbreeding and there are more mates in the wild to produce offspring.

Dispersal requires a source and a sink, an empty or unfilled habitat so that animals can survive.

Some sink habitats have large populations, which would disappear without continual immigration.

Social behavior may limit population

A substantial portion of population consists of surplus animals that do not breed b/c they either die or attempt to breed and fail.

Such individuals are prevented from breeding by dominant individuals

Nonbreeding individuals are capable of breeding if dominant individuals a removed.

Breeding animals are not completely using food and space

Social interactions influence activities and home range

Home range is a place where the animal spend most its time at all year.

Territory is the part of the home range that the animal is protective over.

plants capture and defend space

Plants defend there space differently than animals do

Plant capture and hold on to there space

They never move but they spread out there limbs for new area.

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