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Oyster Recruitment at Eight Location...

Wilson, Craig.

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Oyster Recruitment at Eight Locations on Long Island: Research for Informed Restoration.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Oyster Recruitment at Eight Locations on Long Island: Research for Informed Restoration./
Author:	Wilson, Craig.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
Description:	49 p.
Notes:	Source: Masters Abstracts International, Volume: 82-01.
Contained By:	Masters Abstracts International82-01.
Subject:	Biology. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27999248
ISBN:	9798635206072

Oyster Recruitment at Eight Locations on Long Island: Research for Informed Restoration.
Wilson, Craig.

Oyster Recruitment at Eight Locations on Long Island: Research for Informed Restoration. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 49 p.

Source: Masters Abstracts International, Volume: 82-01.

Thesis (M.S.)--Adelphi University, 2020.

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

Eastern oyster (Crassostrea virginica) populations have significantly declined along the eastern coast of the United States over the past 100 years, with much of this decline coming in the past 40 years. On both shores of Long Island, oyster decline can be attributed to multiple factors: over harvesting, decreased water quality, pollution, siltation, disease, and predation. Numerous studies have addressed oyster restoration on Long Island, but reestablishing historic population levels is difficult due to the same reasons that led to their decline. This study aimed to understand the locations, time of year, and abiotic conditions that are most suitable for oyster settlement. A total of eight sites were sampled, six on the north shore, and two on the south shore. On a monthly basis from May to November (and every other month in the winter), four bags with oyster shell and a HOBO temperature monitor were placed at each site, and then replaced by new bags. Oyster settlement occurred from July to September at four north shore sites, but no south shore site. Using one-way anova tests, it was determined that none the abiotic factors measured in this study were significantly different between sites with settlement and sites without settlement during the months where settlement occurred. Several mixed-effect models were also built, but no variable was determined to have significantly influenced settlement. Thus, it was unclear from our data what determined why settlement occurred at some sites in a specific month, and why it did not occur at others. Even after using available settlement data from 2018 it was still unclear what factors influenced settlement. It is possible that factors not measured in this study, such as ocean currents, spawning rate, and available substrate influenced settlement. Furthermore, it is likely that some of the settlement occurred from anthropogenic seeding, but not all of it did, indicating the presence of some adult oysters on the north shore. These results also suggest that simply putting more oyster shell out during July, August, and September at the four sites with settlement may aid oyster restoration. More research, including incorporating additional factors, needs to be done to understand the optimal conditions for oyster settlement. In addition to this, there needs to be an improvement in the water quality in Long Island Sound and Jamaica Bay, an establishment of no take zones, and further study's on oyster settlement.

ISBN: 9798635206072Subjects--Topical Terms:

522710
Biology.
Subjects--Index Terms:

Dissolved Oxygen

Oyster Recruitment at Eight Locations on Long Island: Research for Informed Restoration.
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520 $a Eastern oyster (Crassostrea virginica) populations have significantly declined along the eastern coast of the United States over the past 100 years, with much of this decline coming in the past 40 years. On both shores of Long Island, oyster decline can be attributed to multiple factors: over harvesting, decreased water quality, pollution, siltation, disease, and predation. Numerous studies have addressed oyster restoration on Long Island, but reestablishing historic population levels is difficult due to the same reasons that led to their decline. This study aimed to understand the locations, time of year, and abiotic conditions that are most suitable for oyster settlement. A total of eight sites were sampled, six on the north shore, and two on the south shore. On a monthly basis from May to November (and every other month in the winter), four bags with oyster shell and a HOBO temperature monitor were placed at each site, and then replaced by new bags. Oyster settlement occurred from July to September at four north shore sites, but no south shore site. Using one-way anova tests, it was determined that none the abiotic factors measured in this study were significantly different between sites with settlement and sites without settlement during the months where settlement occurred. Several mixed-effect models were also built, but no variable was determined to have significantly influenced settlement. Thus, it was unclear from our data what determined why settlement occurred at some sites in a specific month, and why it did not occur at others. Even after using available settlement data from 2018 it was still unclear what factors influenced settlement. It is possible that factors not measured in this study, such as ocean currents, spawning rate, and available substrate influenced settlement. Furthermore, it is likely that some of the settlement occurred from anthropogenic seeding, but not all of it did, indicating the presence of some adult oysters on the north shore. These results also suggest that simply putting more oyster shell out during July, August, and September at the four sites with settlement may aid oyster restoration. More research, including incorporating additional factors, needs to be done to understand the optimal conditions for oyster settlement. In addition to this, there needs to be an improvement in the water quality in Long Island Sound and Jamaica Bay, an establishment of no take zones, and further study's on oyster settlement.
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