Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan
Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan
Indirect Management of Invasive Species through Bio-controls:A bioeconomic model of salmon and alewife in Lake MichiganEli p. Fenichel, Richard D. Hor Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michiganran, and James R. BenceAbstractInvasive species are typically viewed as an economic bad because they cause economic and ecological damages, and can be difficult to control, when direct management is limited, another option is indirect management via bio-controls. Here management is directed at the b Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michiganiocontrol species population (e.g., supplementing this population through stocking) with the aim that, through ecological interactions, the bio-controIndirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan
l species will control the invader. Given the potential complexity of interactions among the bio-control agent, the invader, and people, this approachIndirect Management of Invasive Species through Bio-controls:A bioeconomic model of salmon and alewife in Lake MichiganEli p. Fenichel, Richard D. Hor Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michiganalmon are valuable to recreational anglers, and alewives are their primary' food source in Lake Michigan. We illustrate how stocking salmon can be used to control alewife, while at the same lime alewife can be turned from a net economic bad into a net economic good by providing valuable ecosystem se Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michiganrvices that support the recreational fishery.We present a dynamic model that captures the relationships between anglers, salmon, and alewives. Using oIndirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan
ptimal control theory, we solve for a stocking program that maximizes social welfare. Optimal stocking results in cyclical dynamics. We link concepts Indirect Management of Invasive Species through Bio-controls:A bioeconomic model of salmon and alewife in Lake MichiganEli p. Fenichel, Richard D. Hor Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michiganre critical to the values that humans derive from ecosystems. This research also provides guidance on Lake Michigan fishery management.1IntroductionInvasive species interact with other species in the ecosystem, thereby affecting the services and value that humans derive from the ecosystem. Knowler ( Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan2005) emphasizes the need to consider interactions among ecosystem components when planning management and valuing the impact of invaders. While invadIndirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan
ers often generate economic costs, some invaders may also produce some economic benefits. Examples of positive impacts include service as a new prey sIndirect Management of Invasive Species through Bio-controls:A bioeconomic model of salmon and alewife in Lake MichiganEli p. Fenichel, Richard D. Hor Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigannd Brook 2007), values associated with introductions of charismatic species (Barbier and Shogren 2004), and mitigating the impacts of previous invaders (Barton et al. 2005; Gozlan 2008). In particular, non-native species may be intentionally introduced to mitigate the impacts of previous invaders as Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan pan of bio-control programs (Hoddle 2004). Such bio-control agents may also provide other benefits or damages, such that the net effect of such invasIndirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan
ion could be positive or negative.In this paper, we examine a case in which the introduction of a biocontrol agent turns the prey nuisance species intIndirect Management of Invasive Species through Bio-controls:A bioeconomic model of salmon and alewife in Lake MichiganEli p. Fenichel, Richard D. Hor Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michiganological conditions. Multiple-use species have the potential to result in non-convexities that lead to multiple equilibria, each being potential optima, in which case management history may affect which equilibrium should be pursued (Zivin et al. 2000; Rondeau 2001; Horan and Bulte 2004). Previous s Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigantudies of multiple-use species have considered cases where damages are a function of species density, while benefits may accrue through commodity-baseIndirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan
d harvests or existence values. These values, particularly benefits, arise as a result of direct feedbacks between humans and the species, and direct Indirect Management of Invasive Species through Bio-controls:A bioeconomic model of salmon and alewife in Lake MichiganEli p. Fenichel, Richard D. Hor Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigannvader is indirect, stemming from management of a bio-control agent. Moreover, the source of value is indirect, stemming from the invader supporting the bio-control agent which has value lor recreational angling, noddle (2004) advocates greater consideration of bio-connol to indirectly managing inva Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigansive species. Management of native species may also indirectly influence the impacts of an invader (Drury and Lodge under review). Indirect managementIndirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan
tends to have (positive or negative) spillover effects on other ecosystem services..Spillover effects from management actions that only partially tarIndirect Management of Invasive Species through Bio-controls:A bioeconomic model of salmon and alewife in Lake MichiganEli p. Fenichel, Richard D. Hor Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan2005; Fenichel and Horan 2007). In models of wildlife-disease systems, for instance, management actions such as harvesting are generally non-selective with respect to the disease status of individual animals: there is a chance that harvests could come from either the healthy or the infected populati Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michiganon because infected animals are often not identifiable prior to the kill. Habitat alterations, such as supplemental feeding, also tend to be lion-seleIndirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan
ctive and will impact upon both populations. These imperfectly-targeted management actions can lead to cyclical dynamics in an optimally-managed systeIndirect Management of Invasive Species through Bio-controls:A bioeconomic model of salmon and alewife in Lake MichiganEli p. Fenichel, Richard D. Hor Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan is directed al a different species (the bio-control agent). The expectation is that management of the bio-control agent will influence predator-prey interactions, resulting in indirect management of the non-largeled species - the invader. But we still find that indirect management in this case can Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michiganlead to non-convcxitics and complex feedback lilies involving cyclical management.3We consider (he case of Chinook salmon (Oncorhynchus tschawytscha)Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan
and alewife (Aloso pseudoharengus) management in Lake Michigan. Alewives are an invasive species that directly generate ecosystem disservices by fouliIndirect Management of Invasive Species through Bio-controls:A bioeconomic model of salmon and alewife in Lake MichiganEli p. Fenichel, Richard D. Hor Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michiganntroduced (0 Lake Michigan from the Pacific Northwest, both as a bio-control for alewives and to generate a sport fishery. Alewives comprise the majority of the Chinook salmon diet (Madenjian et al. 2002), and Holey et al. (1998) stale that the recreational Chinook salmon fishery may depend on susta Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michiganining a large alewife forage base. Thus, from the anglers' perspective, alewives provide an important in situ benefit in the production of Chinook salIndirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan
mon. Management of the system is conducted by Slocking Chinook salmon, as alewives are not harvested, and harvest from the recreational salmon fisheryIndirect Management of Invasive Species through Bio-controls:A bioeconomic model of salmon and alewife in Lake MichiganEli p. Fenichel, Richard D. Hor Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan, the multiple-use species problem, and indirect controls. We then solve for an optimal stocking program from the agency's perspective - one (hat maximizes social welfare, defined as the sum of discounted net benefits from the open-access, unregulated, salmon sport fishery minus alewife-induced dama Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michiganges and the cost of the stocking program. In this case the agency is not a true social planner because the agency takes angler behavior as given. ThisIndirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan
can be thought of as an institutional constraint (Dasgupta and Maier 2003). The solution, while efficient from the agency’s perspective, is “second bIndirect Management of Invasive Species through Bio-controls:A bioeconomic model of salmon and alewife in Lake MichiganEli p. Fenichel, Richard D. Hor Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan addition to stocking.We examine the tradeoffs associated with the stocking program in an analytical fashion, and develop general rules that can help guide stocking decision making. We contribute to (he4https://khothuvien.cori!bioeconomic literature by linking non-convexities (Tahvonen and Salo 1996 Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan; Rondeau 2001; Dasguta and Maier 2003) with indirect management and expand understanding of biological capital. Indirect management is compared and cIndirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan
ontrasted with imperfectly targeted management (Mesterton-Gibbons 1987; Clark 2005; Horan and Wolf 2005; Fenichel and Horan 2007; Horan et al. in presIndirect Management of Invasive Species through Bio-controls:A bioeconomic model of salmon and alewife in Lake MichiganEli p. Fenichel, Richard D. Hor Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake MichiganSalmon and alewife management is a dominant issue on Lakes Ontario, Huron, and Michigan. Alewives invaded Lake Michigan in 1949 and imposed costs on society by fouling beaches and drainpipes (O’Gorman and Stewart 1999). Alewives diminished the ability of the Great Lakes to provide ecosystem services Indirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan. It is generally believed that alewife have caused negative effects on native fish species (O’Gorman and Stewart 1999). For example, there is evidencIndirect Management of Invasive Species through Bio-controls A bioeconomic model of salmon and alewife in Lake Michigan
e that alewife predation on lake trout (Salvelinus namaycush) fry impedes the restoration of native lake trout (Krueger et al. 1995; Madenjian et al.Gọi ngay
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