Fueling Global Fishing Fleets

Tyedmers, Peter; Watson, Reg; Pauly, Daniel

doi:10.1579/0044-7447-34.8.635

Cited by 221 publications

(124 citation statements)

References 20 publications

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“…Certainly, this is evidenced by the dramatic decrease in farmgate greenhouse gas emissions (57%) that could result from a hypothetical substitution of all higher-impact fish meals and oils in Norwegian production with less GHG-intensive products such as menhaden meal and oil (although stock capacities must also be considered). Such large differences are to be anticipated given the wide range of meal and oil yield rates between species and the fuel use intensities of fisheries that target them (29).…”

Section: Discussionmentioning

confidence: 99%

Not All Salmon Are Created Equal: Life Cycle Assessment (LCA) of Global Salmon Farming Systems

Pelletier

Tyedmers

Sonesson

et al. 2009

Environ. Sci. Technol.

245

210

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We present a global-scale life cycle assessment of a major food commodity, farmed salmon. Specifically, we report the cumulative energy use, biotic resource use, and greenhouse gas, acidifying, and eutrophying emissions associated with producing farmed salmon in Norway, the UK, British Columbia (Canada), and Chile, as well as a production-weighted global average. We found marked differences in the nature and quantity of material/energy resource use and associated emissions per unit production across regions. This suggests significant scope for improved environmental performance in the industry as a whole. We identify key leverage points for improving performance, most notably the critical importance of least-environmental cost feed sourcing patterns and continued improvements in feed conversion efficiency. Overall, impacts were lowest for Norwegian production in most impact categories, and highest for UK farmed salmon. Our results are of direct relevance to industry, policy makers, eco-labeling programs, and consumers seeking to further sustainability objectives in salmon aquaculture.

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Section: Discussionmentioning

confidence: 99%

Not All Salmon Are Created Equal: Life Cycle Assessment (LCA) of Global Salmon Farming Systems

Pelletier

Tyedmers

Sonesson

et al. 2009

Environ. Sci. Technol.

245

210

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“…In an attempt to provide an average worldwide edible protein energy return, Tyedmers et al (2005) calculated a mean value of 8.0 % for world fisheries. However, it must be noted that this estimation was based on the FUI of the assessed fishing fleets.…”

Section: Overall Galician Extractive Fishing Activitymentioning

confidence: 99%

“…However, it must be noted that this estimation was based on the FUI of the assessed fishing fleets. Consequently, the estimate provided by Tyedmers et al (2005) does not take into consideration the energy consumption linked to a set of background processes. Therefore, despite the worldwide estimate being 0.4 % higher than the approximation for the Galician fleet, the fact that non-fuel energy inputs are disregarded for worldwide fisheries would imply that a correction factor using life cycle standardized assumptions would lower this value considerably.…”

Section: Overall Galician Extractive Fishing Activitymentioning

confidence: 99%

“…In fact, Tyedmers et al (2005) have revealed that approximately 1.2 % of world oil is used to fuel fishing fleets throughout the world. While fuel dependence implies an important economic limitation in most fisheries, it is also a matter of concern from an environmental perspective, due to the derived high greenhouse gas (GHG) emissions (Fredga and Mäler 2010).…”

Section: Introductionmentioning

confidence: 99%

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Edible Protein Energy Return on Investment Ratio (ep-EROI) for Spanish Seafood Products

Vázquez‐Rowe

Villanueva-Rey

Moreira

et al. 2013

AMBIO

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Life cycle assessment (LCA) has developed into a useful methodology to assess energy consumption of fishing fleets and their derived seafood products, as well as the associated environmental burdens. In this study, however, the life cycle inventory data is used to provide a dimensionless ratio between energy inputs and the energy provided by the fish: the edible protein energy return on investment (ep-EROI). The main objective was to perform a critical comparison of seafood products landed in Galicia (NW Spain) in terms of ep-EROI. The combination of energy return on investment (EROI) with LCA, the latter having standardized mechanisms regarding data acquisition and system boundary delimitation, allowed a reduction of uncertainties in EROI estimations. Results allow a deeper understanding of the energy efficiency in the Galician fishing sector, showing that small pelagic species present the highest ep-EROI values if captured using specific fishing techniques. Finally, results are expected to provide useful guidelines for policy support in the EU's Common Fisheries Policy.

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“…Therefore the combined power consumption of the fleet in this region can reach 200 MW, comparable to a mid-size power station using low quality fuel and no emissions control technology. The estimated oil consumption in the region is 750 L fuel km −2 year −1 , [30] which equates to regional levels of ∼100 ppt of NO x in a 1 kmhigh marine boundary layer. [31] Ship NO x emissions in the box model (emitted as NO) were therefore implemented to occur between 2000 and 0440 hours local time, since the fishing vessels are active primarily by night, and an emission of 1 × 1011 molecules cm −2 s −1 was set to occur at each model time step (20 min) so that a maximum mixing ratio of 1.1 ppbv is reached.…”

Section: Local Photochemical Effects Of Ships and Phytoplanktonmentioning

confidence: 99%

Assessing the effect of marine isoprene and ship emissions on ozone, using modelling and measurements from the South Atlantic Ocean

et al. 2010

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Environmental context. Air over the remote Southern Atlantic Ocean is amongst the cleanest anywhere on the planet. Yet in summer a large-scale natural phytoplankton bloom emits numerous natural reactive compounds into the overlying air. The productive waters also support a large squid fishing fleet, which emits significant amounts of NO and NO 2 . The combination of these natural and man-made emissions can efficiently produce ozone, an important atmospheric oxidant.Abstract. Ship-borne measurements have been made in air over the remote South Atlantic and Southern Oceans in January-March 2007. This cruise encountered a large-scale natural phytoplankton bloom emitting reactive hydrocarbons (e.g. isoprene); and a high seas squid fishing fleet emitting NO x (NO and NO 2 ). Using an atmospheric chemistry box model constrained by in-situ measurements, it is shown that enhanced ozone production ensues from such juxtaposed marine biogenic and anthropogenic emissions. The relative impact of shipping and phytoplankton emissions on ozone was examined on a global scale using the EMAC model. Ozone in the marine boundary layer was found to be over ten times more sensitive to NO x emissions from ships, than to marine isoprene in the region south of 45 • . Although marine isoprene emissions make little impact on the global ozone budget, co-located ship and phytoplankton emissions may explain the increasing ozone reported for the 40-60 • S southern Atlantic region.

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Fueling Global Fishing Fleets

Cited by 221 publications

References 20 publications

Not All Salmon Are Created Equal: Life Cycle Assessment (LCA) of Global Salmon Farming Systems

Not All Salmon Are Created Equal: Life Cycle Assessment (LCA) of Global Salmon Farming Systems

Edible Protein Energy Return on Investment Ratio (ep-EROI) for Spanish Seafood Products

Assessing the effect of marine isoprene and ship emissions on ozone, using modelling and measurements from the South Atlantic Ocean

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