東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Implications of Demographic Diversit...

Siple, Margaret Clark.

Linked to FindBook

Google Book

Amazon

博客來

Implications of Demographic Diversity for Forage Fish, Their Fisheries, and Ecosystems.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Implications of Demographic Diversity for Forage Fish, Their Fisheries, and Ecosystems./
Author:	Siple, Margaret Clark.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
Description:	209 p.
Notes:	Source: Dissertation Abstracts International, Volume: 79-05(E), Section: B.
Contained By:	Dissertation Abstracts International79-05B(E).
Subject:	Ecology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10680836
ISBN:	9780355595857

Implications of Demographic Diversity for Forage Fish, Their Fisheries, and Ecosystems.
Siple, Margaret Clark.

Implications of Demographic Diversity for Forage Fish, Their Fisheries, and Ecosystems. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 209 p.

Source: Dissertation Abstracts International, Volume: 79-05(E), Section: B.

Thesis (Ph.D.)--University of Washington, 2017.

Forage fish play a key role in marine ecosystems and fisheries worldwide. They are highly productive, and undergo dramatic fluctuations in productivity, which interact with fishing pressure and spatial dynamics to generate population variability. The mechanisms and demographic processes behind this variability are poorly understood, creating a challenge for fishery managers. In this dissertation, I address the implications of demographic diversity for forage fish ecology and management. I investigate demographic diversity in space (Chapter 1) in space and time (Chapter 2), and among different forage species (Chapters 3 and 4). In the first chapter, I demonstrate that spatial diversity in a largely unfished forage fish population (Puget Sound Pacific herring; Clupea pallasii) can generate portfolio effects, which stabilize their availability as prey. In the second chapter, I build a hierarchical model to address the potential processes behind these portfolio effects, distinguishing temporal variation in mortality from spatial differences, and demonstrating that adult mortality has led to age truncation and recruitment-dominated dynamics. In the third chapter, I develop an age-structured population model and use a management strategy evaluation framework to show that demographic diversity among forage fish species (specifically, for sardine, anchovy, and menhaden-like forage species) affects management outcomes and tradeoffs. In the final chapter, I use a time series approach to investigate asynchronous dynamics in sardine (Sardinops spp.) and anchovy (Engraulis spp.), and show that although these two species are often viewed as alternating members of the forage fish guild, sardine and anchovy alone do not compose a forage portfolio that buffers fisheries and food webs from dramatic shifts in productivity. These results demonstrate the rarity of asynchronous dynamics and the importance of considering, but not relying upon, demographic diversity in forage fish populations.

ISBN: 9780355595857Subjects--Topical Terms:

516476
Ecology.

Implications of Demographic Diversity for Forage Fish, Their Fisheries, and Ecosystems.
LDR:03016nmm a2200325 4500 001 2199580
005 20180613122743.5
008 201008s2017 ||||||||||||||||| ||eng d
020 $a 9780355595857
035 $a (MiAaPQ)AAI10680836
035 $a (MiAaPQ)washington:18016
035 $a AAI10680836
040 $a MiAaPQ $c MiAaPQ
100 1 $a Siple, Margaret Clark. $3 3426326
245 1 0 $a Implications of Demographic Diversity for Forage Fish, Their Fisheries, and Ecosystems.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2017
300 $a 209 p.
500 $a Source: Dissertation Abstracts International, Volume: 79-05(E), Section: B.
500 $a Adviser: Timothy E. Essington.
502 $a Thesis (Ph.D.)--University of Washington, 2017.
520 $a Forage fish play a key role in marine ecosystems and fisheries worldwide. They are highly productive, and undergo dramatic fluctuations in productivity, which interact with fishing pressure and spatial dynamics to generate population variability. The mechanisms and demographic processes behind this variability are poorly understood, creating a challenge for fishery managers. In this dissertation, I address the implications of demographic diversity for forage fish ecology and management. I investigate demographic diversity in space (Chapter 1) in space and time (Chapter 2), and among different forage species (Chapters 3 and 4). In the first chapter, I demonstrate that spatial diversity in a largely unfished forage fish population (Puget Sound Pacific herring; Clupea pallasii) can generate portfolio effects, which stabilize their availability as prey. In the second chapter, I build a hierarchical model to address the potential processes behind these portfolio effects, distinguishing temporal variation in mortality from spatial differences, and demonstrating that adult mortality has led to age truncation and recruitment-dominated dynamics. In the third chapter, I develop an age-structured population model and use a management strategy evaluation framework to show that demographic diversity among forage fish species (specifically, for sardine, anchovy, and menhaden-like forage species) affects management outcomes and tradeoffs. In the final chapter, I use a time series approach to investigate asynchronous dynamics in sardine (Sardinops spp.) and anchovy (Engraulis spp.), and show that although these two species are often viewed as alternating members of the forage fish guild, sardine and anchovy alone do not compose a forage portfolio that buffers fisheries and food webs from dramatic shifts in productivity. These results demonstrate the rarity of asynchronous dynamics and the importance of considering, but not relying upon, demographic diversity in forage fish populations.
590 $a School code: 0250.
650 4 $a Ecology. $3 516476
650 4 $a Wildlife management. $3 571816
650 4 $a Environmental science. $3 677245
650 4 $a Aquatic sciences. $3 3174300
690 $a 0329
690 $a 0286
690 $a 0768
690 $a 0792
710 2 $a University of Washington. $b Aquatic and Fishery Sciences. $3 2093042
773 0 $t Dissertation Abstracts International $g 79-05B(E).
790 $a 0250
791 $a Ph.D.
792 $a 2017
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10680836