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<title>UTas ePrints - Does infectious disease influence the efficacy of marine protected areas? A theoretical framework</title>
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<meta content="McCallum, Hamish I." name="eprints.creators_name" />
<meta content="Gerber, Leah" name="eprints.creators_name" />
<meta content="Jani, Andrea" name="eprints.creators_name" />
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<meta content="2007-09-26" name="eprints.datestamp" />
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<meta content="Marine reserves; host-pathogen models; sustainable harvesting; conservation biology" name="eprints.keywords" />
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<meta content="1. Marine protected areas are increasingly being recommended as an essential component of the management of exploited marine species, but virtually no attention has been given to the influence of parasites and pathogens on the efficacy of marine protected areas. This influence may be substantial, as a primary effect of marine reserves is to increase the density of an exploited population within the reserve relative to outside the reserve, which may facilitate parasite transmission.
2. We used a simple deterministic model of microparasitic infection in a fishery with a reserve to investigate equilibrium yield and parasite prevalence inside and outside the reserve as a function of three control variables: the proportion of habitat inside the reserve, fishing mortality, and the rate of interchange between the stock and the reserve.
3. Whilst our model is generic, we parameterised it with values that may be appropriate to the interaction between abalone and Rickettsia.
4. The presence of a pathogen does not necessarily decrease yield when a reserve is present, particularly if the rate of movement of adult hosts between stock and reserve is low.
5. Synthesis and applications. Pathogens have important implications for the design of marine reserves. Our modelling identifies two key considerations. First, 'fishing out' a pathogen by reducing the host population density to a level below the threshold for disease maintenance is a potential management strategy that is made more difficult by establishing a reserve. Second, the effect of the presence of a highly transmissible pathogen without a reserve is to cause a rapid decline in equilibrium yield for efforts beyond those that produce maximum sustainable yield, making the fishery prone to collapse. Introducing a reserve decreases yield in this case, but makes the fishery much more resistant to collapse.
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<meta content="Journal of Applied Ecology" name="eprints.publication" />
<meta content="42" name="eprints.volume" />
<meta content="688-698" name="eprints.pagerange" />
<meta content="10.1111/j.1365-2664.2005.01043.x" name="eprints.id_number" />
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<meta content="Agardy, M.T. (1994) Advances in marine conservation - the role of marine protected areas. Trends in Ecology & Evolution, 9, 267-270.
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<meta content="1. Marine protected areas are increasingly being recommended as an essential component of the management of exploited marine species, but virtually no attention has been given to the influence of parasites and pathogens on the efficacy of marine protected areas. This influence may be substantial, as a primary effect of marine reserves is to increase the density of an exploited population within the reserve relative to outside the reserve, which may facilitate parasite transmission.
2. We used a simple deterministic model of microparasitic infection in a fishery with a reserve to investigate equilibrium yield and parasite prevalence inside and outside the reserve as a function of three control variables: the proportion of habitat inside the reserve, fishing mortality, and the rate of interchange between the stock and the reserve.
3. Whilst our model is generic, we parameterised it with values that may be appropriate to the interaction between abalone and Rickettsia.
4. The presence of a pathogen does not necessarily decrease yield when a reserve is present, particularly if the rate of movement of adult hosts between stock and reserve is low.
5. Synthesis and applications. Pathogens have important implications for the design of marine reserves. Our modelling identifies two key considerations. First, 'fishing out' a pathogen by reducing the host population density to a level below the threshold for disease maintenance is a potential management strategy that is made more difficult by establishing a reserve. Second, the effect of the presence of a highly transmissible pathogen without a reserve is to cause a rapid decline in equilibrium yield for efforts beyond those that produce maximum sustainable yield, making the fishery prone to collapse. Introducing a reserve decreases yield in this case, but makes the fishery much more resistant to collapse.
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<h1 class="ep_tm_pagetitle">Does infectious disease influence the efficacy of marine protected areas? A theoretical framework</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">McCallum, Hamish I.</span> and <span class="person_name">Gerber, Leah</span> and <span class="person_name">Jani, Andrea</span> (2005) <xhtml:em>Does infectious disease influence the efficacy of marine protected areas? A theoretical framework.</xhtml:em> Journal of Applied Ecology, 42 . pp. 688-698.</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a href="http://eprints.utas.edu.au/628/1/j_appl_ecol_2005.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" class="ep_doc_icon" border="0" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/628/1/j_appl_ecol_2005.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />484Kb</td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://dx.doi.org/10.1111/j.1365-2664.2005.01043.x">http://dx.doi.org/10.1111/j.1365-2664.2005.01043.x</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">1. Marine protected areas are increasingly being recommended as an essential component of the management of exploited marine species, but virtually no attention has been given to the influence of parasites and pathogens on the efficacy of marine protected areas. This influence may be substantial, as a primary effect of marine reserves is to increase the density of an exploited population within the reserve relative to outside the reserve, which may facilitate parasite transmission.
2. We used a simple deterministic model of microparasitic infection in a fishery with a reserve to investigate equilibrium yield and parasite prevalence inside and outside the reserve as a function of three control variables: the proportion of habitat inside the reserve, fishing mortality, and the rate of interchange between the stock and the reserve.
3. Whilst our model is generic, we parameterised it with values that may be appropriate to the interaction between abalone and Rickettsia.
4. The presence of a pathogen does not necessarily decrease yield when a reserve is present, particularly if the rate of movement of adult hosts between stock and reserve is low.
5. Synthesis and applications. Pathogens have important implications for the design of marine reserves. Our modelling identifies two key considerations. First, 'fishing out' a pathogen by reducing the host population density to a level below the threshold for disease maintenance is a potential management strategy that is made more difficult by establishing a reserve. Second, the effect of the presence of a highly transmissible pathogen without a reserve is to cause a rapid decline in equilibrium yield for efforts beyond those that produce maximum sustainable yield, making the fishery prone to collapse. Introducing a reserve decreases yield in this case, but makes the fishery much more resistant to collapse.
</p></div><table style="margin-bottom: 1em" cellpadding="3" class="not_ep_block" border="0"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Article</td></tr><tr><th valign="top" class="ep_row">Additional Information:</th><td valign="top" class="ep_row">The definitive version is available at www.blackwell-synergy.com</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">Marine reserves; host-pathogen models; sustainable harvesting; conservation biology</td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/270702.html">270000 Biological Sciences > 270700 Ecology and Evolution > 270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)</a><br /><a href="http://eprints.utas.edu.au/view/subjects/300705.html">300000 Agricultural, Veterinary and Environmental Sciences > 300700 Fisheries Sciences > 300705 Evaluation of Management Strategies</a><br /><a href="http://eprints.utas.edu.au/view/subjects/300702.html">300000 Agricultural, Veterinary and Environmental Sciences > 300700 Fisheries Sciences > 300702 Pests and Diseases</a></td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">628</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">Prof Hamish McCallum</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">26 Sep 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">09 Jan 2008 02:30</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=628;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&eprintid=628">item control page</a></p>
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