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Date: | Fri, 29 Jul 2022 21:09:32 -0400 |
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Keeping in mind, of course, that there are several sorts of selection processes. For example
1) The most common form of intentional artificial selection is domestication. Humans have attempted, but failed, to domesticate many species. Not all animals are amenable to domestication
2) Relaxed selection can occur when captive conditions permit expression of certain behavioral traits that otherwise would have been selected against in the wild, resulting in an increase in genotypic and phenotypic trait variability.
3) Species targeted for domestication are subjected to strong selective pressures designed to produce a certain outcome, e.g. increased milk production in dairy cows or long, pointed snouts in rat-hunting dogs; but many behavioral changes in domesticated populations are indirect consequences
4) Although non-domestic populations do not undergo strong intentional selection, they do experience unintentional selective pressures. For example, temperament in captive mammals is likely shaped by directional selection
PLB
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