Barausse 1+2 Flashcards
What are Population Dynamics?
What factors primarily influence population dynamics in marine ecosystems?
Why are population dynamics models crucial in marine conservation?
Define recruitment in the context of marine biology.
Why is recruitment variability important in marine population management?
What factors influence recruitment in marine species?
What is the spawner-recruit relationship in marine biology?
Why are spawner-recruit relationships important in fisheries management?
What factors can affect the spawner-recruit relationship?
What are the primary causes of natural mortality in marine species?
How do human activities contribute to mortality in marine populations?
What specific factors affect the mortality of juvenile and larval marine species?
Explain the concept of compensation in population dynamics.
What is depensation, and how does it affect marine populations?
Why are compensation and depensation important concepts in fisheries management?
Define fish stocks and explain their significance in marine conservation.
How are fish stocks managed in fisheries?
What are the challenges in managing fish stocks?
What are surplus production models, and what do they predict?
How are surplus production models used in fisheries management?
What are the limitations of surplus production models?
What is the purpose of the Beverton and Holt model in fisheries management?
What are the key features of the Beverton and Holt model?
Why is the Beverton and Holt model important in fisheries management?
What is the Ricker model used for in population dynamics?
What are the key features of the Ricker model?
- Used in scenarios where overcompensation is a concern, such as in populations where high spawner densities can lead to reduced recruitment due to overcrowding, competition, or limited resources.
- Overcompensation occurs at high population sizes, where too many individuals lead to a decrease in recruitment.
How is the Ricker model applied in fisheries management?
- The Ricker model can be very useful in fisheries management when dealing with populations where overcompensation is a risk.
- By allowing controlled fishing at high population densities, managers can prevent the decline in recruitment that overcompensation might cause
Describe the Shepherd model and its role in population dynamics.
What makes the Shepherd model more flexible than the Beverton and Holt or Ricker models?
Why is the Shepherd model important in fisheries management?
What is Maximum Sustainable Yield (MSY)?
Why is MSY a key concept in fisheries management?
What are the challenges associated with using MSY in fisheries management?
should always be proportional to the biomass
How do Natural Environmental Factors influence Marine Populations?
How do human activities impact marine populations?
Why is it important to include both environmental and anthropogenic effects in population models?
What does model fitting mean in the context of population dynamics?
Why is the quality of data input critical in population models?
- CPUE is often used as a key data input in population models because it provides an estimate of relative abundance—how much fish is being caught per unit of effort
- garbage-in, garbage-out
What are the challenges associated with model fitting in population dynamics?
What does Maximum Economic Yield (MEY) represent in fisheries management?
How does MEY differ from Maximum Sustainable Yield (MSY)?
What is the Gordon-Schaefer model, and what is it used for?
What are the key components of the Gordon-Schaefer model?
Why is the Gordon-Schaefer model important in fisheries management?
Define Catch Per Unit Effort (CPUE) and its significance in fisheries.
How is CPUE used in fisheries management?
What are the limitations of using CPUE as an indicator?
