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WMAN 150 EXAM 2 questions with 100% correct answers
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WMAN 150 EXAM 2 questions with 100% correct answers
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WMAN 150 EXAM 2 questions with 100%correct answers
Overexploitation - correct answer ✔✔Human overuse of a population of organisms to an extent that
threatens its viability or significantly alters the natural community in which it lives
Overfishing - correct answer ✔✔¾ of the world's fish stocks are fully fished or overexploited
"Fishing down the food chain"
Determining Sustainable Harvest Levels - correct answer ✔✔la = proportion surviving at each age
ma = # of females born per adult female at each age
R0 = Σlama (total # of daughters reproduced in the lifetime of an "average" female)
R0 > 1: population is growing
R0 = 1: population is stable
R0 < 1: population is declining
Sustainable harvest: R0 > 1
Bushmeat - correct answer ✔✔Wildlife & meat derived from the wild (e.g., forest)
Subsistence & trade
No longer sustainable
, - larger populations
- no other food
- no regulations &/or enforcement
Commercial Exploitation - correct answer ✔✔Potential market is enormous
Greed
Domestic substitutes often inferior
Price higher for rare species
"Tragedy of the Commons"
Lack of enforcement
High-tech equipment
Disparity among national currencies
Subsistence Exploitation - correct answer ✔✔Impact determined by population size (of people)
Recreational Exploitation - correct answer ✔✔Hunting, angling, wildlife viewing
Incidental Exploitation - correct answer ✔✔Bycatch
1/3 - ¼ of total marine landings is bycatch
Shrimp trawling - 5:1 (unwanted : shrimp)
Consequences of Overexploitation - correct answer ✔✔Age
-most profitable fish: largest & oldest
Sex ratios
Genetics
-artificial selection
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