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

Examining the Genetic Basis and Physiology of Survival in Extreme Low Salinity to Improve Aquaculture of the Eastern Oyster (Crassostrea virginica).

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Examining the Genetic Basis and Physiology of Survival in Extreme Low Salinity to Improve Aquaculture of the Eastern Oyster (Crassostrea virginica)./
作者:	McCarty, Alexandra J.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2022,
面頁冊數:	186 p.
附註:	Source: Dissertations Abstracts International, Volume: 84-01, Section: B.
Contained By:	Dissertations Abstracts International84-01B.
標題:	Genetics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29065692
ISBN:	9798834021001

Examining the Genetic Basis and Physiology of Survival in Extreme Low Salinity to Improve Aquaculture of the Eastern Oyster (Crassostrea virginica).
McCarty, Alexandra J.

Examining the Genetic Basis and Physiology of Survival in Extreme Low Salinity to Improve Aquaculture of the Eastern Oyster (Crassostrea virginica). - Ann Arbor : ProQuest Dissertations & Theses, 2022 - 186 p.

Source: Dissertations Abstracts International, Volume: 84-01, Section: B.

Thesis (Ph.D.)--University of Maryland, College Park, 2022.

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

The eastern oyster, Crassostrea virginica, is an important aquaculture species and supports a growing industry along the east coast of the United States. However, increases in freshwater from storm events and intentional diversions can expose coastal aquaculture operations to extreme low salinity (< 5), resulting in reduced productivity and mortality. The primary objectives of this dissertation were to investigate the biology and genetic basis of low salinity tolerance to improve eastern oyster aquaculture. In Chapter 2, I developed and conducted a series of extreme low salinity (2.5) challenges to estimate the quantitative genetic parameters of low salinity survival. A moderate narrow-sense heritability was estimated for challenge survival, h2 ≈ 0.4. In addition, osmolality of hemolymph collected from oysters during the first week of the challenge suggest that all individuals conformed to the surrounding low salinity regardless of challenge survival. In Chapter 3, I performed additional low salinity challenges to assess the importance of challenge duration (2 or 6 months) and temperature (chronic or fluctuating) on low salinity survival. I also investigated algae removal during the chronic challenge to better understand oyster response during low salinity stress. Phenotypic (rS = 0.89) and genetic (rG = 0.81) correlations between family mortality were high across the two challenges, indicating that a 30-day exposure at a constant low salinity (2.5) and temperature (27 °C) is a sufficient progeny test for low salinity survival. Modest associations between algae removal metrics and survival in extreme low salinity indicate that individual feeding ability may relate to differential low salinity survival. Lastly, in Chapter 4, I performed genome mapping to investigate the genomic architecture of low salinity survival. Quantitative trait locus mapping and linkage disequilibrium analysis revealed a significant region on eastern oyster chromosome 1 and 7. Genomic prediction accuracies for survival and day to death in extreme low salinity were moderate and encouraging, 0.49-0.57. The results from my dissertation characterize the genetic basis of survival during low salinity events and support the incorporation of this trait into breeding efforts to improve production and enhance the resiliency of the eastern oyster aquaculture industry.

ISBN: 9798834021001Subjects--Topical Terms:

530508
Genetics.
Subjects--Index Terms:

Breeding

Examining the Genetic Basis and Physiology of Survival in Extreme Low Salinity to Improve Aquaculture of the Eastern Oyster (Crassostrea virginica).
LDR:03652nmm a2200385 4500 001 2348236
005 20220908123008.5
008 241004s2022 ||||||||||||||||| ||eng d
020 $a 9798834021001
035 $a (MiAaPQ)AAI29065692
035 $a AAI29065692
040 $a MiAaPQ $c MiAaPQ
100 1 $a McCarty, Alexandra J. $0 (orcid)0000-0002-7222-5255 $3 3687561
245 1 0 $a Examining the Genetic Basis and Physiology of Survival in Extreme Low Salinity to Improve Aquaculture of the Eastern Oyster (Crassostrea virginica).
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2022
300 $a 186 p.
500 $a Source: Dissertations Abstracts International, Volume: 84-01, Section: B.
500 $a Advisor: Plough, Louis V.
502 $a Thesis (Ph.D.)--University of Maryland, College Park, 2022.
506 $a This item must not be sold to any third party vendors.
520 $a The eastern oyster, Crassostrea virginica, is an important aquaculture species and supports a growing industry along the east coast of the United States. However, increases in freshwater from storm events and intentional diversions can expose coastal aquaculture operations to extreme low salinity (< 5), resulting in reduced productivity and mortality. The primary objectives of this dissertation were to investigate the biology and genetic basis of low salinity tolerance to improve eastern oyster aquaculture. In Chapter 2, I developed and conducted a series of extreme low salinity (2.5) challenges to estimate the quantitative genetic parameters of low salinity survival. A moderate narrow-sense heritability was estimated for challenge survival, h2 ≈ 0.4. In addition, osmolality of hemolymph collected from oysters during the first week of the challenge suggest that all individuals conformed to the surrounding low salinity regardless of challenge survival. In Chapter 3, I performed additional low salinity challenges to assess the importance of challenge duration (2 or 6 months) and temperature (chronic or fluctuating) on low salinity survival. I also investigated algae removal during the chronic challenge to better understand oyster response during low salinity stress. Phenotypic (rS = 0.89) and genetic (rG = 0.81) correlations between family mortality were high across the two challenges, indicating that a 30-day exposure at a constant low salinity (2.5) and temperature (27 °C) is a sufficient progeny test for low salinity survival. Modest associations between algae removal metrics and survival in extreme low salinity indicate that individual feeding ability may relate to differential low salinity survival. Lastly, in Chapter 4, I performed genome mapping to investigate the genomic architecture of low salinity survival. Quantitative trait locus mapping and linkage disequilibrium analysis revealed a significant region on eastern oyster chromosome 1 and 7. Genomic prediction accuracies for survival and day to death in extreme low salinity were moderate and encouraging, 0.49-0.57. The results from my dissertation characterize the genetic basis of survival during low salinity events and support the incorporation of this trait into breeding efforts to improve production and enhance the resiliency of the eastern oyster aquaculture industry.
590 $a School code: 0117.
650 4 $a Genetics. $3 530508
650 4 $a Biology. $3 522710
650 4 $a Aquatic sciences. $3 3174300
653 $a Breeding
653 $a Eastern oyster
653 $a Genomic selection
653 $a Low salinity stress
653 $a Physiology
653 $a Quantitative genetics
690 $a 0369
690 $a 0306
690 $a 0792
710 2 $a University of Maryland, College Park. $b Marine-Estuarine-Environmental Sciences. $3 1023615
773 0 $t Dissertations Abstracts International $g 84-01B.
790 $a 0117
791 $a Ph.D.
792 $a 2022
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29065692