Atlantic cod have experienced decades of overharvesting. As a result, the age of maturity of Atlantic cod populations have decreased, so that fish today reach sexual maturity early – at significantly smaller sizes than fish 50 years ago. From this, we can interpret that populations of Atlantic cod are experiencing. A. Directional selection B. frequency dependent Selection C. Disruptive Selection D. Genetic Drift E. Stabilizing Selection
- Atlantic cod have experienced decades of overharvesting. As a result, the age of maturity of Atlantic cod populations have decreased, so that fish today reach sexual maturity early – at significantly smaller sizes than fish 50 years ago. From this, we can interpret that populations of Atlantic cod are experiencing.
A. Directional selection
B. frequency dependent Selection
C. Disruptive Selection
D. Genetic Drift
E. Stabilizing Selection
2. In 1958, the average age to sexual maturity in the Atlantic cod population was 7.0 years. In 1959 there was a particularly large harvest of the Atlantic cod population. Fish that bred successfully that year had an average age of sexual maturity of 6.0 years. The difference between these values represents
A. Mutation rate
B. Selection Differential
C. Response to selection
D. Heritability
3. The difference in age at sexual maturity between the offspring of the fish that survived the harvest in 1959 (i.e. 6.2 years) and the population average before the harvest is
A. Mutation rate
B. Selection Differential
C. Response to selection
D. Heritability.
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