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Eco Evo Exam 2(c.10)


Social behavior Interactions with members of one's own species, including mates, offspring, other relatives, and unrelated individuals.
Dilution effect The reduced, or diluted, probability of predation to a single animal when it is in a group.
Lek The location of an animal aggregation to put on a display to attract the opposite sex.
Territory Any area defended by one or more individuals against the intrusion of others.
Dominance hierarchy A social ranking among individuals in a group, typically determined through contests such as fighting or other contests of strength or skill.
Donor The individual who directs a behavior toward another individual as part of a social interaction.
Recipient The individual who receives the behavior of a donor in a social interaction.
Cooperation When the donor and the recipient of a social behavior both experience increased fitness from an interaction.
Selfishness When the donor of a social behavior experiences increased fitness and the recipient experiences decreased fitness.
Spitefulness When social interaction reduces the fitness of both donor and recipient.
Altruism A social interaction that increases the fitness of the recipient and decreases the fitness of the donor.
Direct fitness The fitness that an individual gains by passing on copies of its genes to its offspring.
Indirect fitness The fitness that an individual gains by helping relatives pass on copies of their genes.
Direct selection Selection that favors direct fitness.
Indirect selection Selection that favors indirect fitness. Also known as Kin selection.
Coefficient of relatedness The numerical probability of an individual and its relatives carrying copies of the same genes from a recent common ancestor.
Eusocial A type of social animal in which individuals live in large groups with overlapping generations, cooperation in nest building and brood care, and reproductive dominance by one or a few individuals.
Caste Individuals within a social group sharing a specialized form of behavior.
Haplodiploid A sex-determination system in which one sex is haploid and the other sex is diploid.
Queen The dominant, egg-laying female in eusocial insect societies.
Created by: BriawnaW