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A Quantitative Metric to Identify Critical Elements within Seafood Supply Networks ArchiMer
Plaganyi, Eva E.; Van Putten, Ingrid; Thebaud, Olivier; Hobday, Alistair; Innes, James; Lim-camacho, Lilly; Norman-lopez, Ana; Bustamante, Rodrigo H.; Farmery, Anna; Fleming, Aysha; Frusher, Stewart; Green, Bridget; Hoshino, Eriko; Jennings, Sarah; Pecl, Gretta; Pascoe, Sean; Schrobback, Peggy; Thomas, Linda.
A theoretical basis is required for comparing key features and critical elements in wild fisheries and aquaculture supply chains under a changing climate. Here we develop a new quantitative metric that is analogous to indices used to analyse food-webs and identify key species. The Supply Chain Index (SCI) identifies critical elements as those elements with large throughput rates, as well as greater connectivity. The sum of the scores for a supply chain provides a single metric that roughly captures both the resilience and connectedness of a supply chain. Standardised scores can facilitate cross-comparisons both under current conditions as well as under a changing climate. Identification of key elements along the supply chain may assist in informing...
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00250/36163/34722.pdf
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Individual transferable quota contribution to environmental stewardship: a theory in need of validation ArchiMer
Van Putten, Ingrid; Boschetti, Fabio; Fulton, Elizabeth A.; Smith, Anthony D.m.; Thebaud, Olivier.
We explored the extent to which (1) individual transferable quotas (ITQs) may lead to changes in environmental stewardship and (2) environmental stewardship may in turn contribute to explain the success or otherwise of ITQs in meeting sustainability objectives. ITQs are an example of incentive-based fisheries management in which fishing rights can be privately owned and traded. ITQs are aimed at resolving the problems created by open-access fisheries. ITQs were proposed to promote economic efficiency, and there is growing empirical evidence that ITQs meet a number of economic and social fisheries management objectives. Even though improved stock status arises as a consequence of the total allowable catch levels implemented together with ITQs, the effect is...
Tipo: Text Palavras-chave: Comanagement; Environmental ethics; Fisheries management; Fishing rights; Stewardship.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00250/36165/34720.pdf
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Structured Decision-Making Identifies Effective Strategies and Potential Barriers for Ecosystem-Based Management of a Range-Extending Species in a Global Marine Hotspot ArchiMer
Robinson, Lucy M.; Marzloff, Martin; Van Putten, Ingrid; Pecl, Gretta; Jennings, Sarah; Nicol, Sam; Hobday, Alistair J.; Tracey, Sean; Hartmann, Klaas; Haward, Marcus; Frusher, Stewart.
Climate-driven changes in ocean currents have facilitated the range extension of the long-spined sea urchin (Centrostephanus rodgersii) from Australia's mainland to eastern Tasmania over recent decades. Since its arrival, destructive grazing by the urchin has led to widespread formation of sea urchin 'barrens'. The loss of habitat, biodiversity and productivity for important commercial reef species in conjunction with the development of an urchin fishery has led to conflicting objectives among stakeholders, which poses complex challenges for regional management. Stakeholder representatives and managers were engaged via a participatory workshop and subsequent one-on-one surveys to trial a structured decision-making process to identify effective...
Tipo: Text Palavras-chave: Structured decision-making; Decision analysis; Multi-method elicitation; Stakeholder engagement; Ecosystem-based management; Species range extension; Keystone herbivore; Global marine hotspot.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00590/70226/69512.pdf
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