White fish from the North Sea is equally climate friendly as farmed fish

Jan 23, 2012

The environmental impact of plaice and cod caught wild in the North Sea is similar to that of imported farmed fish like salmon, tilapia and pangasius. This was the conclusion arrived at by LEI, part of Wageningen UR, in a study published last week. It is expected that there will be a considerable reduction in the environmental impact of plaice and cod fishing following the application of technological innovations.

The results of the life cycle analysis (LCA) performed by LEI show that there are no significant differences between energy use and the emission of greenhouse gases (which cause climate change) of plaice and cod fishing on the one hand and salmon, tilapia and pangasius on the other hand. The use of fertilizers is much lower in the case of wild caught fish than among the farmed studied.

Although fishing for plaice and cod uses more energy than the production of meat, the contribution to greenhouse gas production is comparable to that of pork. This is because the production of meat is associated with emissions of other besides CO2, such as methane. Fish scores better than beef, but chicken scores slightly better than fish.

This study describes the environmental impact of the Dutch fisheries sector. The score of North Sea fish could improve significantly due to the potential of the fisheries sector to achieve further . The continued implementation of innovation projects in the fisheries should result in considerable improvements.

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More information: Report: Environmental performance of wild-caught North Sea whitefish; A comparison with aquaculture and animal husbandry using LCA

Provided by Wageningen University

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DrSki
not rated yet Jan 23, 2012
I would like to have the source for their comment on how the "use of fertilizers is much lower" in the wild-caught fish. While I might use fertilizer (organic and inorganic depending on the soil quality) in growing vegetables and flowers, I haven't ever read that 'fertilizer' is needed or used in 'farm-raised' or 'lake/river/ocean-raised' fish. In fact, in the case of domesticated fish - too much nitrogen will kill the fish. Actually, the 'farm-raised' fish can actually provide an organic "free" (minus transportation) source of nitrogen for farming. The water that contains large amounts of soluble nitrogen must be changed at intervals, and can be used for irrigation. Was this calculated? Was this 'negative' cost factored into the study?

The Professors at this University better screen the studies they publish (or allow to be published).