Cross-vessel eco-efficiency analysis. A case study for purse seining fishing from North Portugal targeting European pilchard

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• 作者：Sara González-García ; Pedro Villanueva-Rey…
• 关键词：LCA-?DEA method ; Life cycle assessment ; Sardina pilchardus ; Skipper effect
• 刊名：The International Journal of Life Cycle Assessment
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：20
• 期：7
• 页码：1019-1032
• 全文大小：1,268 KB
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• 作者单位：Sara González-García (1) (2)
  Pedro Villanueva-Rey (2)
  Sara Belo (1)
  Ian Vázquez-Rowe (2) (3)
  María Teresa Moreira (2)
  Gumersindo Feijoo (2)
  Luis Arroja (1)
  
  1. CESAM and Department of Environment and Planning, University of Aveiro, Campus Universitário de Aveiro, 3810-193, Aveiro, Portugal
  2. Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, Rúa Lope Gómez de Marzoa s/n, 15782, Santiago de Compostela, Spain
  3. Red Peruana de Ciclo de Vida (RPCV) -Department of Engineering, Pontificia Universidad Católica del Perú, Av. Universitaria 1801, San Miguel, Lima, 32, Peru
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Environmental Economics
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7502

文摘

Purpose European pilchard captures constitute an important source of income for the Portuguese fishing sector. This raw material is used for a varied range of final seafood products, such as canning, fresh seafood consumption or bait for other fisheries. The Portuguese purse seining fleet, which concentrates most of the pilchard landings, has recently obtained the Marine Stewardship Council certification scheme, demonstrating the effort of the fleet to comply with sustainable fishing practices. However, this scheme does not consider the human inputs to the fishery, such as fuel consumption or the use of other materials and resources. Consequently, life-cycle methods, such as Life Cycle Assessment (LCA), have arisen to provide a thorough assessment of the environmental profile of fishing fleets. In the current study, LCA is combined with Data Envelopment Analysis (DEA), a management tool, in order to understand the eco-efficiency of the individual vessels that compose this fleet. Methods A 5-step LCA-?DEA method, previously used to assess resembling vessel samples, was used to examine the efficiency of 20 purse seiners in the northern Portugal for years 2011 and 2012. Individual Life Cycle Inventories (LCIs) were gathered for each vessel to perform, thereafter, the Life Cycle Impact Assessment (LCIA). DEA matrices were generated based on the LCI in order to obtain the efficiency values for each unit. Finally, based on the efficiency projections provided by the DEA model, a new LCIA was performed for inefficient vessels in order to calculate the potential environmental benefits of operating at higher levels of efficiency. Results and discussion The average efficiency of the fleet in the two different years of assessment was slightly above 60?%. Moreover, individual vessels showed a fairly low standard deviation across the 2?years of assessment, demonstrating that units with higher levels of efficiency tend to maintain these values through the analysed window. In fact, this result, given its strong correlation with fuel use, appears to have relation with the existence of a certain level of “skipper effect- Important environmental benefits, mainly linked to the optimisation of fuel resources, could be attained if inefficient vessels were to operate efficiently, especially in terms of two main impact categories: climate change and fossil depletion. Conclusions The results in this study confirm that fishing small-pelagic fish shows low energy intensity as compared to other fisheries. However, despite this worldwide tendency, the use of LCA-?DEA confirms that substantial improvements in terms of optimising energy and material inputs, as well as in reducing environmental impacts, can be attained in these fishing fleets.