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Investigating Challenges and Solutions for Management and Assessment of Reef Fishes off the Southeastern U.S.A.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Investigating Challenges and Solutions for Management and Assessment of Reef Fishes off the Southeastern U.S.A./
作者:	Runde, Brendan James.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	211 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-05, Section: B.
Contained By:	Dissertations Abstracts International83-05B.
標題:	Behavior. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28688459
ISBN:	9798544204978

Investigating Challenges and Solutions for Management and Assessment of Reef Fishes off the Southeastern U.S.A.
Runde, Brendan James.

Investigating Challenges and Solutions for Management and Assessment of Reef Fishes off the Southeastern U.S.A. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 211 p.

Source: Dissertations Abstracts International, Volume: 83-05, Section: B.

Thesis (Ph.D.)--North Carolina State University, 2021.

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

The southeast US Atlantic supports fisheries for a wide variety of species. Participation in and regulations for these fisheries have both increased in recent decades, causing more fish to be released. Fisheries that release a portion of catch pose challenges for management, particularly if release mortality is high. The complex of reef-associated fishes in the southeast US supports one such fishery. Severe barotrauma experienced by many species in this group leads to levels of release mortality that can impede sustainability. These circumstances have left managers with few options; in order to achieve sustainability in the fishery for fishes like snappers and groupers, either release mortality must be substantially reduced or effort must be eliminated in a portion of habitat. In the first two chapters of this dissertation, I explored these two options via empirical studies. I tagged deep-water groupers and released them with descender devices, and estimated ~60% survival for fish released at depth (a major improvement over the assumed 0% survival for surface releases). In addition, I evaluated the effect of a Marine Protected Area (MPA) that was designated in 2009 off Wilmington, NC. Using scientific sonar and biological sampling, I found limited evidence that the MPA is working as intended, though other analyses were inconclusive. It is possible that more time and stricter enforcement are necessary before the MPA effect is detectable. In the third chapter of this dissertation, I explored the implications of a phenomenon that has long been ignored in most fisheries management: that some individual fish are caught and released multiple times. I modeled tag return data for four species of reef fishes and described the implications for stock assessments. Findings suggest that the proportion of fish that survive release is higher after releases 2 or greater as compared to the first release; this may be a result of phenotypic heterogeneity with respect to robustness against the stressors of capture and release. Further, values used in some stock assessments may be biased as a result of miscounting unique fish multiple times; assessment scientists should be cautious when using total catch (including releases) as stock assessment input. Overall, this dissertation provides valuable content for stock assessment scientists and fishery managers. Evaluating and refining management approaches is a critical step that must be undertaken if sustainable fisheries are to be attained. The results and insights provided herein have already made a difference in this region's management, and will continue to do so.

ISBN: 9798544204978Subjects--Topical Terms:

532476
Behavior.

Investigating Challenges and Solutions for Management and Assessment of Reef Fishes off the Southeastern U.S.A.
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