19. Aquaculture and Fisheries Interactions Flashcards
Why is it important to learn about fisheries and aquaculture management jointly?
Both treat fish, and the key is the interaction between them, including feed, broodstock, ocean use, and market
How do capture fisheries and aquaculture interact?
They interact in various ways, including the ecological impacts of marine fish feed production, dependence on the capture of wild juveniles, and externalities of aquaculture production on wild fish stocks.
- Fisheries provide inputs for aquaculture, such as feed and juvenile fish.
- Aquaculture can have negative ecological impacts on wild fish stocks and their habitats.
- Competition in the market place between farmed and captured fish can also occur.
What is the fish meal trap?
It is a hypothesis that there is a positive feedback loop between aquaculture’s use of aqua feed and declining fish stocks.
: Is there evidence to suggest that aquaculture has caused declines in capture fisheries?
No, most of the top contributors to fish meal supplies are not overfished or undergoing overfishing. Regulation and management of the fisheries play an important role.
Does feed supply limit aquaculture growth?
No, the hypothesis of the fish meal trap is not supported by data. Total aquaculture production and production by species group grew more than total fish meal and fish oil production between 1976 and 2017.
How does aquaculture depend on the capture of juveniles?
Aquaculture can depend on the capture of wild fingerlings, spat, postlarvae, and/or broodstock for species where the production cycle is not closed.
What are some externalities of aquaculture production on wild fish stocks?
These include habitat destruction, disease and parasites, genetic and ecological interactions, and competition for space.
How do interactions through the market influence the economic viability and sustainability of either the aquaculture or fishery sector?
: Interactions through the market can significantly influence the economic viability and sustainability of either the aquaculture or fishery sector, as demonstrated by various models and empirical evidence.
Should we think about fisheries and aquaculture as distinct and separate systems?
: No, based on [Anderson, 2002], we should not, as the degree of control over the environment, production, and marketing systems is closely related to the strength of property rights.
What is the core difference between aquaculture and traditional fisheries?
The core difference is the degree of control over the environment, production, and marketing systems, which is closely related to the strength of property rights.
How are property rights related to aquaculture, ranching, and fishing?
The degree of control is closely related to the strength of property rights, with open-access fishery having no property rights and closed-system aquaculture having strong property rights.
What is the fish meal trap hypothesis?
- It suggests that growth in aquaculture and the associated demand for marine ingredients for feed increases pressure on capture fisheries and induces common-pool resource externalities.
- Common-pool resource externalities in capture fisheries can also limit supplies of marine feeds in ways that constrain aquaculture growth.
Is there evidence to support the fish meal trap hypothesis?
- No, there is little evidence to suggest that aquaculture has caused declines in capture fisheries.
- The hypothesis that feed supply limits aquaculture growth is also not supported by data.
How does aquaculture depend on capture of juveniles?
- Some aquaculture may depend on the capture of wild fingerlings, spat, postlarvae and/or broodstock for species where the production cycle is not closed.
- Aquaculture expansion may result in overfishing and depletion of wild fish stocks if the fishery is not well managed.
How can interactions through the market influence the economic viability and sustainability of either the aquaculture or fishery sector?
- Increased farmed fish production can contribute to reduced rents and participation in traditional fisheries, creating an incentive to improve the efficiency of fishery management through well-designed, rights-based systems and also to reduce the number of fishers.
