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Fish movements in a predator-prey an...

The University of Wisconsin - Madison.

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Fish movements in a predator-prey and fisheries management context.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Fish movements in a predator-prey and fisheries management context./
作者:	Jensen, Olaf P.
面頁冊數:	177 p.
附註:	Adviser: James F. Kitchell.
Contained By:	Dissertation Abstracts International69-05B.
標題:	Agriculture, Fisheries and Aquaculture. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3314169
ISBN:	9780549636847

Fish movements in a predator-prey and fisheries management context.
Jensen, Olaf P.

Fish movements in a predator-prey and fisheries management context. - 177 p.

Adviser: James F. Kitchell.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2008.

Hydroacoustics and electronic tag technologies have developed rapidly in recent years. Development of mathematical models to make use of these data has not kept pace with the development of these technologies. In this thesis, I develop models that use observations of fish behavior from hydroacoustics (Chapter II); radio, acoustic, and conventional (non-electronic) tags (Chapter III); and conventional and pop-up satellite archival tags (PSATs, Chapter IV and V) to answer questions related to predator-prey interactions and population dynamics. The results have important implications for our understanding of how fish manage trade-offs between predation risk and growth and how we manage fish populations and trade-offs among competing fisheries.

ISBN: 9780549636847Subjects--Topical Terms:

1020913
Agriculture, Fisheries and Aquaculture.

Fish movements in a predator-prey and fisheries management context.
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520 $a Hydroacoustics and electronic tag technologies have developed rapidly in recent years. Development of mathematical models to make use of these data has not kept pace with the development of these technologies. In this thesis, I develop models that use observations of fish behavior from hydroacoustics (Chapter II); radio, acoustic, and conventional (non-electronic) tags (Chapter III); and conventional and pop-up satellite archival tags (PSATs, Chapter IV and V) to answer questions related to predator-prey interactions and population dynamics. The results have important implications for our understanding of how fish manage trade-offs between predation risk and growth and how we manage fish populations and trade-offs among competing fisheries.
520 $a In Chapter II, I developed linked foraging, bioenergetic, and predation risk models to understand the implications of different diel vertical migration (DVM) strategies for coregonids (Coregonus spp.) in Lake Superior. Coregonids in the western arm of Lake Superior appear to follow DVM trajectories that result in a low ratio of risk to growth.
520 $a In Chapter III, I developed a population model for taimen, Hucho taimen, in Mongolia. I compared the economic and population consequences of two extremes: a 100% catch-release recreational fishery and a commercial fishery operating at maximum sustainable yield. The existing recreational fishery appears to have little impact on the population, while providing 20 to 30 times the revenue of a potential commercial fishery.
520 $a Recreational fisheries for striped marlin, Kajikia audax, off of Baja California, Mexico are in conflict with commercial longline fisheries that take this species primarily as bycatch. Areas closed to longlining have been used to protect striped marlin; however, there is little analysis to suggest that closed areas are a useful management tool for highly mobile pelagic marine species. Using information from PSATs applied to striped marlin, I show that the current closed areas protect striped marlin during a large fraction of their time spent near Mexico (Chapter IV). A population dynamics (Chapter V) model fit to data from the Japanese longline fleet shows that past closures of Mexican waters allowed a rapid recovery. Recreational catch-release can also help protect this population, but the effect is not as large.
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