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Ecosystem-based evaluation of fisher...

Chagaris, David Demetre, Jr.

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Ecosystem-based evaluation of fishery policies and tradeoffs on the West Florida Shelf.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Ecosystem-based evaluation of fishery policies and tradeoffs on the West Florida Shelf./
作者:	Chagaris, David Demetre, Jr.
面頁冊數:	151 p.
附註:	Source: Dissertation Abstracts International, Volume: 75-09(E), Section: B.
Contained By:	Dissertation Abstracts International75-09B(E).
標題:	Aquatic sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3584451
ISBN:	9781321048483

Ecosystem-based evaluation of fishery policies and tradeoffs on the West Florida Shelf.
Chagaris, David Demetre, Jr.

Ecosystem-based evaluation of fishery policies and tradeoffs on the West Florida Shelf. - 151 p.

Source: Dissertation Abstracts International, Volume: 75-09(E), Section: B.

Thesis (Ph.D.)--University of Florida, 2013.

This item must not be sold to any third party vendors.

Ecosystem-based fishery management inherently involves confronting tradeoffs and requires taking a holistic approach to evaluating and developing fisheries management strategies that look beyond single-species harvest management. The goal of this study was to identify ecological tradeoffs that arise through predator-prey interactions, tradeoffs between conflicting management objectives, and tradeoffs associated with marine protected areas. To accomplish this, I developed a trophicdynamic ecosystem model of the West Florida Shelf with particular emphasis on the reef fish component (groupers and snappers) of the fish community, using Ecopath with Ecosim and Ecospace.

ISBN: 9781321048483Subjects--Topical Terms:

3174300
Aquatic sciences.

Ecosystem-based evaluation of fishery policies and tradeoffs on the West Florida Shelf.
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245 1 0 $a Ecosystem-based evaluation of fishery policies and tradeoffs on the West Florida Shelf.
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500 $a Source: Dissertation Abstracts International, Volume: 75-09(E), Section: B.
500 $a Adviser: Michael Allen.
502 $a Thesis (Ph.D.)--University of Florida, 2013.
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520 $a Ecosystem-based fishery management inherently involves confronting tradeoffs and requires taking a holistic approach to evaluating and developing fisheries management strategies that look beyond single-species harvest management. The goal of this study was to identify ecological tradeoffs that arise through predator-prey interactions, tradeoffs between conflicting management objectives, and tradeoffs associated with marine protected areas. To accomplish this, I developed a trophicdynamic ecosystem model of the West Florida Shelf with particular emphasis on the reef fish component (groupers and snappers) of the fish community, using Ecopath with Ecosim and Ecospace.
520 $a The dynamic Ecosim model was used to project forward a suite of management prescriptions and predict ecosystem impacts that occur due to predation and competition. Overall, I found that there were winners and losers in all policy options and that Vermilion Snapper (Rhomboplites aurorubens) and Black Seabass (Centropristis striata) were predicted to be at a competitive disadvantage to other groupers and snappers. Mostly modest impacts were predicted for policies oriented towards single species, such as rebuilding plans, and more widespread impacts were predicted for scenarios that affect a suite of species or species in the middle of the food web.
520 $a The tradeoff relationship between reef fish biomass and fishery profits was revealed through a policy optimization search. My results suggested that the WFS is suboptimal in terms of both biomass and profits and that a set of balanced policy options exist where profits and reef fish biomass both increase by about 20% and 50% respectively. Lastly, marine protected areas were evaluated using a spatially explicit model, Ecospace. The model predicted little ecological or economic benefit from the small existing closures on the WFS and suggested that MPAs between 15-30% of the area can increase population sizes without causing economic collapse of the fishery. MPAs that were larger in size and with less edge were more beneficial than many smaller MPAs.
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