41 Questions
Which of the following best describes the reason for the collapse of the Northern Cod Fishery in 1992?
Overfishing due to trawling
What was the estimated stock size of the Northern Cod Fishery in the past?
1.2 million tons
What is the estimated stock size of the Northern Cod Fishery currently?
0.1 million tons
What was the goal of modeling for sustainable harvesting?
To understand what determines whether or not a fishery is sustainable
What should the harvest rate of a fishery match to ensure population replenishment?
What is coming into the population
What can cause the population of a fishery to decrease significantly?
Over-harvesting
What factors should be considered when developing a model for fish population dynamics?
Factors influencing population growth and capacity for growth
What is the importance of constructing visual representations in modeling fish population dynamics?
To help others understand complex information
What should be maintained to prevent population decline or unstable equilibrium in a fishery?
A happy stable equilibrium
What can the model for fish population dynamics be applied to?
The Grand Banks and other fisheries
True or false: The collapse of the Northern Cod Fishery was caused by trawling and the identification of spawning grounds.
True
True or false: Canada attempted to regulate the fishery with entry quotas in 1977.
True
True or false: The fishery completely collapsed despite the implementation of quotas.
True
True or false: The estimated current biomass of the Northern Cod Fishery is higher than it was in the past.
False
True or false: The Canadian government implemented quotas that were too high, causing the fishery to collapse.
True
True or false: Natural variation does not affect the population's ability to handle harvesting.
False
True or false: Over-harvesting can lead to a significant decrease in the population.
True
True or false: A process-based model will be developed in the next lecture.
True
True or false: The model for fish population dynamics can only be applied to the Grand Banks.
False
True or false: Completing the workshop before the assignment is recommended.
True
What are the limiting factors for natural populations?
Predation, environmental parameters, and crowding and competition
What factors does the logistic model take into account for population growth?
The logistic model takes into account factors such as predation and competition that limit population growth.
Why is it important to consider stochasticity in population modeling?
It is important to consider stochasticity or randomness in population growth because it affects the ability of populations to handle harvesting and can lead to unstable equilibrium.
What are the challenges of managing fisheries sustainably?
The challenges of managing fisheries sustainably include a poor track record of human management and the need for a model that predicts the outcomes of sustainable harvesting.
What is the relationship between population models and declining fisheries?
Population models can be applied to fisheries management and highlight the decline of fisheries worldwide.
What was the cause of the Atlantic cod fishery collapse in the 1990s?
The Atlantic cod fishery collapse in the 1990s was caused by overfishing and the identification of spawning grounds.
What is the purpose of developing a model for fish population dynamics?
The purpose is to understand and predict the population dynamics of fish in order to implement sustainable harvesting practices.
What factors should be considered when developing a model for fish population dynamics?
Factors such as population growth, capacity for growth, and the impact of the living environment and reproduction on the population should be considered.
What is the importance of constructing visual representations in modeling fish population dynamics?
Constructing visual representations helps others understand complex information and evaluate the robustness of theories.
What is meant by maintaining a stable equilibrium in a fishery?
Maintaining a stable equilibrium means preventing population decline or unstable equilibrium and allowing for natural rectification from one year to the next.
What can cause the population of a fishery to decrease significantly?
Over-harvesting can cause the population of a fishery to decrease significantly.
What is the goal of sustainable harvesting?
Allow the population to fix itself and revert back to its original state, without crashing or slipping into an unstable environment.
What are the two rules for sustainability harvesting?
The first rule is to maintain the population at a steady state and extract only what can be replenished. The second rule is to ensure that the population can sustain the goal of harvesting without causing decline.
What are the four learning objectives of the expert summariser?
The first is to formulate a simple, general, process-based model for a math system. The second is to translate between verbal, conceptual, or graphical models and mathematical models. The third is to use theoretical modeling to assess how the system may respond to different circumstances. The final objective is to evaluate the robustness of regions from their theory.
What is the importance of constructing visual representations in modeling fish population dynamics?
Visual representations help to understand and communicate complex concepts and relationships in a more intuitive way.
What are the factors that should be considered when developing a model for fish population dynamics?
The model should take into account factors that influence population sizes and capacity for growth, such as recruitment, fishing pressure, and ecological interactions.
What is the difference between a geometric model and a logistic model?
A geometric model describes population growth over time by the same amount or more or less the same proportion, while a logistic model describes natural systems where there are limits to population growth due to factors like environmental parameters, crowding, and competition.
Why are geometric models used for compound interest?
Geometric models are used for compound interest because they describe population growth over time by the same amount or more or less the same proportion, which is similar to the way compound interest grows.
What factors can limit population growth in a logistic model?
Factors like environmental parameters, crowding, and competition can limit population growth in a logistic model.
What is the importance of considering variability in population modeling?
Variability is an inherent part of all natural systems and must be factored into population modeling to accurately represent real-world scenarios.
What is the significance of the decline in fisheries?
The decline in fisheries indicates a problem with the system and affects community composition, associated ecological processes, and has negative economic impacts.
Quiz: The Urgency of a Sustainable Fisheries Model Test your knowledge on the need for a sustainable model to manage fisheries and combat the decline in fish populations. Find out why urgent attention is required and discover the potential of a sustainability model based on theoretical understanding.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
