Abstract:The failures of traditional target-species management have led many to propose an ecosystem approach to fisheries to promote sustainability. The ecosystem approach is necessary, especially to account for fishery-ecosystem interactions, but by itself is not sufficient to address two important factors contributing to unsustainable fisheries: inappropriate incentives bearing on fishers and the ineffective governance that frequently exists in commercial, developed fisheries managed primarily by total-harvest limits and input controls. We contend that much greater emphasis must be placed on fisher motivation when managing fisheries. Using evidence from more than a dozen natural experiments in commercial fisheries, we argue that incentive-based approaches that better specify community and individual harvest or territorial rights and price ecosystem services and that are coupled with public research, monitoring, and effective oversight promote sustainable fisheries. 710 Résumé : Les échecs des aménagements traditionnels centrés sur les espèces-cibles ont incité plusieurs chercheurs à proposer des approches halieutiques basées sur les écosystèmes pour favoriser les pêches durables. L'approche écosys-témique est nécessaire, en particulier, pour tenir compte des interactions pêche-écosystème; elle ne suffit pas, cependant, par elle-même pour régler deux facteurs importants qui contribuent à rendre les pêches non durables : les incitations insuffisantes pour les pêcheurs et la gestion inefficace souvent présente dans les pêches commerciales déve-loppées qui sont régies principalement par des limites à la récolte totale et par des contrôles d'entrée. Nous croyons qu'on doit mettre beaucoup plus l'accent sur la motivation des pêcheurs dans la gestion de la pêche. En utilisant des données provenant de plus d'une douzaine d'expériences naturelles de pêche commerciale, nous cherchons à démontrer que des approches fondées sur les incitations qui précisent mieux la communauté, les récoltes individuelles et les droits territoriaux et qui évaluent aussi financièrement les services de l'écosystème, couplées avec de la recherche gouvernementale, de la surveillance et de la gestion efficace, promeuvent les pêches commerciales durables.[Traduit par la Rédaction] Grafton et al.

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In 2000 and 2001 Canadians were shocked by water contamination events that took place in two provinces. In 2004 we undertook an internet-based survey across Canada that asked respondents to identify in percentage terms their total drinking water consumption according to one of three sources: tap water, bottled water, and home-filtered water (either some type of container or an in-tap filter device). In this paper we investigate the factors that influence these choices and whether choosing to either filter or purchase water is linked to perceptions of health concerns with respect to tap water. A series of one-way analysis of variance (ANOVA) tests suggest that the presence of children in a household and self-reported concern that tap water causes health problems lead to significantly greater consumption of bottled water or filtered water and significantly less tap water consumption. In order to examine these choices in a multivariate framework, we estimate a multinomial logit model. Factors yielding higher probabilities of a respondent being primarily a bottled water drinker (relative to the choice of tap water) include:higher income, unpleasant taste experiences with tap water, non-French-speaking, and being a male with children in one's household. Similar factors yield higher probabilities of a respondent being primarily a filtered tap water drinker. An important finding is that two key variables linking a person's health perceptions regarding tap water quality are significant factors leading to the choice of either filtered tap water or bottled water over tap water. They are: a variable showing the degree of health concerns a respondent has with respect to tap water and a second variable indicating whether the respondent believes bottled water is safer than tap water.

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