Biology 3446B Lecture Notes - Lecture 14: Negative Feedback, Bowhunting, Overexploitation
22 Feb 2014
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Potential damages/costs should hunting/trapping be lost as a wildlife management tool in north. . 45 billion in disease control rabies alone. million - . 3 billion to control white-tailed deer. million - million to control furbearers. billion/year in damage to livestock and crops (us: . 7 million (canada) Harvestable surplus: # of animals that can be removed from a population without affecting the size of the population at some later time (next breeding season/next hunting season) For all stable of increasing populations, there is an annual population increase. Subsequent mortality returns the population to about the same size next spring. Unhunted populations: annual surplus dies from natural mortality before next breeding season (i. e. robins) But, a decrease in spring breeding population may not cause a decreased population in the next fall hunting season: reproductive success often responds in a density dependent manner.
