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Unformatted text preview: rsity of Ottawa The unintentional harvest of
organisms as a consequence of
human recreational, economic or
recreational activities, e.g.
migratory songbird mortality from
skyscrapers, road kill, manatee
mortality from power boats. 2012 Indirect
BIO 3115 Université d’Ottawa / University of Ottawa 2012 M7.12 BIO 3115 Conservation Biology Sturgeon M7.25
BIO 3115 Université d’Ottawa / University of Ottawa 2012 Exploitation represents an
additional source of mortality.
If there is not compensatory
increases in fecundity,
population growth rates
decline, which may lead to
reductions in population size.
E.g. decline in sturgeon catch
per unit effort in the lower
Saskatchewan River indicated
a dramatic reduction in stock
size. Annual sturgeon CPUE (kg/licence) Consequences of exploitation I:
reductions in population size
120 A Cumberland
75 80 85 90 95 Year (1900) M7.26
BIO 3115 Université d’Ottawa / University of Ottawa 2012 M7.13 BIO 3115 Conservation Biology Consequences of exp...
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- Winter '14
- Conservation Biology