Biology 1001A Chapter Notes - Chapter 47: Estrous Cycle, Haplodiploidy, Cortisol
28 Nov 2017
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Class 16 reading chapter 47 sections 47. 12-47. 14. Social behaviour: the interactions that animals have with other members of their species, has profound effects on an individual"s reproductive success. If a female chooses to take her nursing young and leave the pride, her efficiency as a hunter declines, and she is less able to protect her young. Why live in a group: by hunting together, lions are more efficient foragers than when they hunt alone; therefore, they raise more young, the threat pf hyenas also keeps them together. 47. 12b group living has its costs and benefits. Cons: living in groups can also be expensive, one cost can be increased competition for food, communal living may facilitate the spread of contagious diseases and parasites. Not all groups are social: the 10 million brazilian free-tailed bats emerging from a cave roost near san antonio, Texas, are no more a social group than the dozens of people leaving a high-rise apartment or university residence.
