東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

FindBook

Google Book

Amazon

博客來

The Influence of Aquaculture on Marine Microbiota and Pathogen Communities in a British Columbia Coastal Ecosystem.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The Influence of Aquaculture on Marine Microbiota and Pathogen Communities in a British Columbia Coastal Ecosystem./
作者:	Shea, Dylan Wesley.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2022,
面頁冊數:	192 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-09, Section: B.
Contained By:	Dissertations Abstracts International83-09B.
標題:	Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28862875
ISBN:	9798209906599

The Influence of Aquaculture on Marine Microbiota and Pathogen Communities in a British Columbia Coastal Ecosystem.
Shea, Dylan Wesley.

The Influence of Aquaculture on Marine Microbiota and Pathogen Communities in a British Columbia Coastal Ecosystem. - Ann Arbor : ProQuest Dissertations & Theses, 2022 - 192 p.

Source: Dissertations Abstracts International, Volume: 83-09, Section: B.

Thesis (Ph.D.)--University of Toronto (Canada), 2022.

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

The productivity of wild-capture fisheries has long plateaued and global dependence on aquaculture is progressively increasing. Despite the perception that substituting wild caught seafood for domestic production benefits the conservation of wild populations through decreased fishing pressure, this is frequently not the case. Aquaculture can challenge the conservation of wild populations via the harvest of wild fish for feed, degradation of wild habitat, and by facilitating the spread of infectious disease. This thesis examines how aquaculture facilities influence microparasite transmission dynamics and the potential consequences for co-occurring wild species. I investigate these topics in coastal British Columbia, Canada, where wild Pacific salmon populations encounter open-net salmon farms along their migration routes. In chapter 2, I use seawater filtration and quantitative PCR (qPCR) to quantify the presence of DNA for 39 viral, bacterial, and eukaryotic microparasite species in the marine environment in relation to active Atlantic salmon farms. I show that the odds of encountering an infectious agent are 2.72 times higher at active salmon farms relative to inactive control sites. In chapter 3, I evaluate Atlantic salmon eDNA dispersal at 2m and 8m depths throughout 55 km of narrow migratory channels, in relation to four Atlantic salmon farms. I show that long distance dispersal (1.5 km - 3.9 km) occurs, and the spatial extent of environmental eDNA dispersal depends primarily on current velocity and depth. In chapter 4, I evaluate environmental microbe communities using deep amplicon sequencing to evaluate variation in community structure among 57 salmon farm tenures in relation to aquaculture activity, temperature, salinity, turbidity, and multiple scales of spatial predictors. The results from chapter 4 show that the effect of salmon farm activity on the marine microbiota was detectable but small relative to environmental variation and spatial structure although three bacterial Orders: Flavobacteriales, Rhodobacterales, and Alteromonadales, stood out as strongly positively correlated with salmon farm activity. The sustainability of aquaculture and the persistence of many wild populations will depend on our understanding of the local and regional influences of domestic reservoirs on microparasite transmission and our ability to develop integrated control measures to limit transmission among wild populations.

ISBN: 9798209906599Subjects--Topical Terms:

516476
Ecology.
Subjects--Index Terms:

Aquaculture

The Influence of Aquaculture on Marine Microbiota and Pathogen Communities in a British Columbia Coastal Ecosystem.
LDR:03699nmm a2200373 4500 001 2348175
005 20220908122952.5
008 241004s2022 ||||||||||||||||| ||eng d
020 $a 9798209906599
035 $a (MiAaPQ)AAI28862875
035 $a AAI28862875
040 $a MiAaPQ $c MiAaPQ
100 1 $a Shea, Dylan Wesley. $0 (orcid)0000-0001-6524-5381 $3 3687497
245 1 4 $a The Influence of Aquaculture on Marine Microbiota and Pathogen Communities in a British Columbia Coastal Ecosystem.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2022
300 $a 192 p.
500 $a Source: Dissertations Abstracts International, Volume: 83-09, Section: B.
500 $a Advisor: Krkosek, Marty;Short, Steven.
502 $a Thesis (Ph.D.)--University of Toronto (Canada), 2022.
506 $a This item must not be sold to any third party vendors.
520 $a The productivity of wild-capture fisheries has long plateaued and global dependence on aquaculture is progressively increasing. Despite the perception that substituting wild caught seafood for domestic production benefits the conservation of wild populations through decreased fishing pressure, this is frequently not the case. Aquaculture can challenge the conservation of wild populations via the harvest of wild fish for feed, degradation of wild habitat, and by facilitating the spread of infectious disease. This thesis examines how aquaculture facilities influence microparasite transmission dynamics and the potential consequences for co-occurring wild species. I investigate these topics in coastal British Columbia, Canada, where wild Pacific salmon populations encounter open-net salmon farms along their migration routes. In chapter 2, I use seawater filtration and quantitative PCR (qPCR) to quantify the presence of DNA for 39 viral, bacterial, and eukaryotic microparasite species in the marine environment in relation to active Atlantic salmon farms. I show that the odds of encountering an infectious agent are 2.72 times higher at active salmon farms relative to inactive control sites. In chapter 3, I evaluate Atlantic salmon eDNA dispersal at 2m and 8m depths throughout 55 km of narrow migratory channels, in relation to four Atlantic salmon farms. I show that long distance dispersal (1.5 km - 3.9 km) occurs, and the spatial extent of environmental eDNA dispersal depends primarily on current velocity and depth. In chapter 4, I evaluate environmental microbe communities using deep amplicon sequencing to evaluate variation in community structure among 57 salmon farm tenures in relation to aquaculture activity, temperature, salinity, turbidity, and multiple scales of spatial predictors. The results from chapter 4 show that the effect of salmon farm activity on the marine microbiota was detectable but small relative to environmental variation and spatial structure although three bacterial Orders: Flavobacteriales, Rhodobacterales, and Alteromonadales, stood out as strongly positively correlated with salmon farm activity. The sustainability of aquaculture and the persistence of many wild populations will depend on our understanding of the local and regional influences of domestic reservoirs on microparasite transmission and our ability to develop integrated control measures to limit transmission among wild populations.
590 $a School code: 0779.
650 4 $a Ecology. $3 516476
650 4 $a Aquatic sciences. $3 3174300
653 $a Aquaculture
653 $a Environmental dispersal
653 $a Environmental DNA
653 $a Environmental impacts
653 $a Infectious disease
653 $a Pacific salmon
690 $a 0329
690 $a 0792
710 2 $a University of Toronto (Canada). $b Ecology and Evolutionary Biology. $3 3190014
773 0 $t Dissertations Abstracts International $g 83-09B.
790 $a 0779
791 $a Ph.D.
792 $a 2022
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28862875