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Parent–offspring conflict (POC) is an expression coined in 1974 by Robert Trivers. It is used to describe the evolutionary conflict arising from differences in optimal parental investment (PI) in an offspring from the standpoint of the parent and the offspring. PI is any investment by the parent in an individual offspring that decreases the ...
Robert Ludlow "Bob" Trivers (/ ˈ t r ɪ v ər z /; born February 19, 1943) is an American evolutionary biologist and sociobiologist.Trivers proposed the theories of reciprocal altruism (1971), parental investment (1972), facultative sex ratio determination (1973), and parent–offspring conflict (1974).
Maternal-fetal conflict, also known as obstetric conflict, occurs when a pregnant woman’s (maternal) interests conflict with the interests of the fetus.Legal and ethical considerations involving women's rights and the rights of the fetus as a patient and future child, have become more complicated with advances in medicine and technology.
Older hunters may wish to attract women interested in an extramarital relationship, or to be a co-wife. [95] [96] In these northern Kalahari groups, the killing of a large animal indicates a man who has mastered the art of hunting and can support a family. Many women seek a man who is a good hunter, has an agreeable character, is generous, and ...
The isolated family member (either a parent or child up against the rest of the otherwise united family.) Parent vs. parent (frequent fights amongst adults, whether married, divorced, or separated, conducted away from the children.) The polarized family (a parent and one or more children on each side of the conflict.)
There is much support for maintenance of mate choice by direct benefits [5] and this approach offers the least controversial model to explain discriminate mating. [ 6 ] Indirect benefits increase genetic fitness for the offspring, and thereby increase the parents' inclusive fitness .
While normal kin-terms discussed above denote a relationship between two entities (e.g. the word 'sister' denotes the relationship between the speaker or some other entity and another feminine entity who shares the parents of the former), trirelational kin-terms—also known as triangular, triadic, ternary, and shared kin-terms—denote a ...
The co-operative behaviour of social insects like the honey bee can be explained by kin selection.. Kin selection is a process whereby natural selection favours a trait due to its positive effects on the reproductive success of an organism's relatives, even when at a cost to the organism's own survival and reproduction. [1]