Biology 1001A Lecture Notes - Lecture 16: Reciprocal Altruism, Fetus, Blood Sugar
23 Aug 2017
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Lecture 16: selection is fundamentally competitive, group living and cooperation are common. Example fish school together to avoid being captured by predators, because the chances are lower that the predator catches a specific fish: longer-lived species are more likely to develop cooperative behavior than shorter-lived ones. There is no negotiation behavior or intermediate situation: living in groups can be expensive: Some animals learn to isolate the infected members to avoid the spread of diseases: not all animals that live together are social (ex. Within the aggression, there may be social units, but the aggression itself is not necessarily a social unit: structures of social animals: Dominance hierarchy: dominant individuals have priority access to food, mate, sleeping sites. In some cases, such as wolf packs, the dominant individuals have to constantly defend their status. Female lions are more productive when they are part of a pride (their efficiency as a hunter declines: example of cooperation: parental care, helping non-descendants: apparently altruism.
