Portfolio management of wild fish stocks

2004 ◽  
Vol 49 (3) ◽  
pp. 317-329 ◽  
Author(s):  
Steven F Edwards ◽  
Jason S Link ◽  
Barbara P Rountree
Keyword(s):  
Portfolio Management ◽  
Wild Fish ◽  
Fish Stocks

scholarly journals Seasonal patterns and diets of wild fish assemblages associated with Mediterranean coastal fish farms

2008 ◽  
Vol 65 (7) ◽  
pp. 1153-1160 ◽  
Author(s):  
Damian Fernandez-Jover ◽  
Pablo Sanchez-Jerez ◽  
Just Tomás Bayle-Sempere ◽  
Carlos Valle ◽  
Tim Dempster
Keyword(s):  
Fish Assemblages ◽  
Abundant Species ◽  
Stomach Content Analysis ◽  
Wild Fish ◽  
Seasonal Patterns ◽  
Fish Farms ◽  
Coastal Fish ◽  
Fish Stocks ◽  
Floating Structures ◽  
Cage Fish

Abstract Fernandez-Jover, D., Sanchez-Jerez, P., Bayle-Sempere, J. T., Valle, C., and Dempster, T. 2008. Seasonal patterns and diets of wild fish assemblages associated with Mediterranean coastal fish farms. – ICES Journal of Marine Science, 65: 1153–1160. Fish are attracted to floating structures, including coastal cage fish farms, sometimes in dense aggregations. To understand better the influence of aquaculture on wild fish stocks, we carried out seasonal visual censuses around three southwestern Mediterranean farms over 2 years to assess the temporal patterns of the aggregated fish assemblage. In addition, we analysed the diet of the five most abundant species. Aggregations around all farms were large throughout the year, although species composition and abundance differed among farms and seasons. Fish farms are attractive habitats for certain species of wild fish in specific seasons. Adult fish of reproductive size dominated the assemblages, and stomach content analysis revealed that 66–89% of fish of the five most abundant taxa had consumed food pellets lost from the cages. We estimated that wild fish consume up to 10% of the pellets used at farms, indicating that food is a key attractant. Regional monitoring of farm-associated wild fish assemblages could aid management of the interaction of aquaculture and wild fish resources, because changes in feeding behaviour may have consequences for fish populations and local fisheries.

scholarly journals Reared fish, farmed escapees and wild fish stocks—a triangle of pathogen transmission of concern to Mediterranean aquaculture management

2013 ◽  
Vol 3 (2) ◽  
pp. 153-161 ◽  
Author(s):  
P Arechavala-Lopez ◽  
P Sanchez-Jerez ◽  
JT Bayle-Sempere ◽  
I Uglem ◽  
I Mladineo
Keyword(s):  
Pathogen Transmission ◽  
Wild Fish ◽  
Fish Stocks ◽  
Aquaculture Management ◽  
Farmed Escapees

The Precautionary Approach and risk management: can they increase the probability of successes in fishery management?

2001 ◽  
Vol 58 (1) ◽  
pp. 99-107 ◽  
Author(s):  
Ray Hilborn ◽  
Jean-Jacques Maguire ◽  
Ana M Parma ◽  
Andrew A Rosenberg
Keyword(s):  
Risk Management ◽  
Portfolio Management ◽  
Fishery Management ◽  
Fishing Communities ◽  
Individual Species ◽  
Precautionary Approach ◽  
Fish Stocks ◽  
Management Policies ◽  
Management Approaches ◽  
Made In

Considerable progress has been made in the implementation of the Precautionary Approach to the protection of fish stocks, but applying the Precautionary Approach to the protection of fishing communities lags considerably. The principle of intergenerational equity, one of the main tenets of the Precautionary Approach, and the principle of sustainable utilization both imply that the Precautionary Approach should explicitly incorporate the protection of fishing communities, not only the resources they depend on. Risk assessment aims primarily at evaluating the consequences of various harvest strategies in terms of probabilistic statements about future trends in yields, biomass, and dangers to the stock, while risk management involves finding and implementing management policies, strategies, and tactics that reduce the risk to the communities exploiting them. Not all fishery management approaches deal equally well with risk, with some compounding rather than reducing risk. Portfolio management, whereby fishing enterprises have the ability to choose among a diverse portfolio of harvestable resources, would mitigate against the risk of fluctuations in the abundance, availability, or price of individual species. Although much remains to be achieved in better assessing risk, fishery management agencies should immediately implement risk management.

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