Population managements Flashcards
Why is population management important?
- Invasions
- Endangered species
- Resource management
- Balance exploitation and economy
What do net recruitment curves show?
How much you can harvest per unit time at each level of the population withot decreasing the population further
What can you infer when you plot harvesting strategy and the recruitment curve together?
How the MSY will supress the population
Whether the population will grow or shrink
What is the harvesting strategy?
The amount you can plan to take from the population, dependent upon population level
What could harvesting too much cause?
The collapse of a population
What is the fixed effort harvesting strategy?
What is the equation?
Having the same number of fishers, same number of boats and a set allowed fishing time. H = qen H = harvest q = effciency e = effort N = population
Why is the fixed effort harvesting strategy better?
There is only one stable equilibrium point and no “breakpoint”
What are allee effects?
Inverse density dependence
