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Trophic resources available to the eastern oyster, Crassostrea virginica, in the long island sound estuary : a multi-method assessment

Author: Melissa Ann Krisak
Publisher: ©2015
Dissertation: M.S. Southern Connecticut State University 2015
Edition/Format:   Thesis/dissertation : Thesis/dissertation : Manuscript   Archival Material : English
Summary:
The Long Island Sound population of Crassostrea virginica, the Eastern oyster, has fluctuated historically, but remains an important fishery through aquaculture efforts. During this study oyster trophic resources were examined by several methods to investigate food availability for C. virginica. Seasonal community composition and abundance of phytoplankton were studied along with oyster glycogen during 2009 and 2010  Read more...
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Genre/Form: Academic theses
Material Type: Thesis/dissertation, Manuscript, Internet resource
Document Type: Book, Archival Material, Internet Resource
All Authors / Contributors: Melissa Ann Krisak
OCLC Number: 1002219421
Notes: A thesis submitted to the School of Graduate Studies in partial fulfillment of the requirements for the degree of Master of Science.
Description: 76 leaves ; 29 cm
Responsibility: by Melissa Ann Krisak

Abstract:

The Long Island Sound population of Crassostrea virginica, the Eastern oyster, has fluctuated historically, but remains an important fishery through aquaculture efforts. During this study oyster trophic resources were examined by several methods to investigate food availability for C. virginica. Seasonal community composition and abundance of phytoplankton were studied along with oyster glycogen during 2009 and 2010 in coastal Connecticut, USA embayments and tidal rivers. Phytoplankton communities, temperature and salinity presented typical seasonal patterns and ranges. Appropriately sized chlorophyll-a-containing particles always were available for oyster consumption. Availability of sufficient food was further supported by the analysis of oyster glycogen, as glycogen is a proxy for nutritional status in oysters. Glycogen measured at the beginning and end of quiescence also indicated minimal consumption of energy during the overwintering period when oysters do not feed appreciably (d"°C). Although not identical, stations were able to support oysters similarly. While the appropriate trophic resources were available, it is imperative that aquaculture efforts continue to maintain or increase harvests of oysters from Long Island Sound.

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