Seasonal Variation in the Chemical Composition and Condition Indices of Pacific Oyster, Crassostrea gigas , Grown in Trays or on the Sea Bed

Chemical composition and condition indices of tray and bottom-cultured Pacific oyster, Crassostrea gigas, were measured and compared over a 13-mo period. Tray oysters were less dense than bottom oysters as a result of increased porosity of shells. Dry meat condition indices were slightly higher in o...

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Published in:Canadian Journal of Fisheries and Aquatic Sciences
Main Authors: Whyte, J. N. C., Englar, J. R.
Format: Article in Journal/Newspaper
Language:English
Published: Canadian Science Publishing 1982
Subjects:
Online Access:http://dx.doi.org/10.1139/f82-146
http://www.nrcresearchpress.com/doi/pdf/10.1139/f82-146
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spelling crcansciencepubl:10.1139/f82-146 2023-12-17T10:29:02+01:00 Seasonal Variation in the Chemical Composition and Condition Indices of Pacific Oyster, Crassostrea gigas , Grown in Trays or on the Sea Bed Whyte, J. N. C. Englar, J. R. 1982 http://dx.doi.org/10.1139/f82-146 http://www.nrcresearchpress.com/doi/pdf/10.1139/f82-146 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 39, issue 8, page 1084-1094 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1982 crcansciencepubl https://doi.org/10.1139/f82-146 2023-11-19T13:38:29Z Chemical composition and condition indices of tray and bottom-cultured Pacific oyster, Crassostrea gigas, were measured and compared over a 13-mo period. Tray oysters were less dense than bottom oysters as a result of increased porosity of shells. Dry meat condition indices were slightly higher in oysters grown in trays. Chloride and iodide levels peaked in early spring. Minor seasonal deviations occurred from the mean 61.0% polymeric matter, 31.5% hydrophilic matter of low molecular weight, and 7.5% lipid matter in both groups of oysters. Nonprotein to protein nitrogen ratio in tray and bottom oysters averaged 0.37 and 0.35, respectively, throughout the season. A procedure was developed to assess glycogen in situ in polymeric material fractionated from meat. Glycogen averaged 79.5 and 79.0% of the total glucose in tray and bottom oysters, respectively; the remainder consisted of the homologous series of α(1 → 4)-linked D-glucose oligomers. Degree of polymerization of oligosaccharides in tray and bottom oysters averaged 2.93 and 2.91, respectively. Dry meat condition indices correlated predominantly with protein condition indices, only secondarily with glycogen condition indices and insignificantly with the remaining constituent condition indices of tray and bottom oysters.Key words: Crassostrea gigas, tray and bottom cultures, chemical composition, nitrogen, carbohydrates, halides, density, condition indices, seasonal variations Article in Journal/Newspaper Crassostrea gigas Pacific oyster Canadian Science Publishing (via Crossref) Pacific Canadian Journal of Fisheries and Aquatic Sciences 39 8 1084 1094
institution Open Polar
collection Canadian Science Publishing (via Crossref)
op_collection_id crcansciencepubl
language English
topic Aquatic Science
Ecology, Evolution, Behavior and Systematics
spellingShingle Aquatic Science
Ecology, Evolution, Behavior and Systematics
Whyte, J. N. C.
Englar, J. R.
Seasonal Variation in the Chemical Composition and Condition Indices of Pacific Oyster, Crassostrea gigas , Grown in Trays or on the Sea Bed
topic_facet Aquatic Science
Ecology, Evolution, Behavior and Systematics
description Chemical composition and condition indices of tray and bottom-cultured Pacific oyster, Crassostrea gigas, were measured and compared over a 13-mo period. Tray oysters were less dense than bottom oysters as a result of increased porosity of shells. Dry meat condition indices were slightly higher in oysters grown in trays. Chloride and iodide levels peaked in early spring. Minor seasonal deviations occurred from the mean 61.0% polymeric matter, 31.5% hydrophilic matter of low molecular weight, and 7.5% lipid matter in both groups of oysters. Nonprotein to protein nitrogen ratio in tray and bottom oysters averaged 0.37 and 0.35, respectively, throughout the season. A procedure was developed to assess glycogen in situ in polymeric material fractionated from meat. Glycogen averaged 79.5 and 79.0% of the total glucose in tray and bottom oysters, respectively; the remainder consisted of the homologous series of α(1 → 4)-linked D-glucose oligomers. Degree of polymerization of oligosaccharides in tray and bottom oysters averaged 2.93 and 2.91, respectively. Dry meat condition indices correlated predominantly with protein condition indices, only secondarily with glycogen condition indices and insignificantly with the remaining constituent condition indices of tray and bottom oysters.Key words: Crassostrea gigas, tray and bottom cultures, chemical composition, nitrogen, carbohydrates, halides, density, condition indices, seasonal variations
format Article in Journal/Newspaper
author Whyte, J. N. C.
Englar, J. R.
author_facet Whyte, J. N. C.
Englar, J. R.
author_sort Whyte, J. N. C.
title Seasonal Variation in the Chemical Composition and Condition Indices of Pacific Oyster, Crassostrea gigas , Grown in Trays or on the Sea Bed
title_short Seasonal Variation in the Chemical Composition and Condition Indices of Pacific Oyster, Crassostrea gigas , Grown in Trays or on the Sea Bed
title_full Seasonal Variation in the Chemical Composition and Condition Indices of Pacific Oyster, Crassostrea gigas , Grown in Trays or on the Sea Bed
title_fullStr Seasonal Variation in the Chemical Composition and Condition Indices of Pacific Oyster, Crassostrea gigas , Grown in Trays or on the Sea Bed
title_full_unstemmed Seasonal Variation in the Chemical Composition and Condition Indices of Pacific Oyster, Crassostrea gigas , Grown in Trays or on the Sea Bed
title_sort seasonal variation in the chemical composition and condition indices of pacific oyster, crassostrea gigas , grown in trays or on the sea bed
publisher Canadian Science Publishing
publishDate 1982
url http://dx.doi.org/10.1139/f82-146
http://www.nrcresearchpress.com/doi/pdf/10.1139/f82-146
geographic Pacific
geographic_facet Pacific
genre Crassostrea gigas
Pacific oyster
genre_facet Crassostrea gigas
Pacific oyster
op_source Canadian Journal of Fisheries and Aquatic Sciences
volume 39, issue 8, page 1084-1094
ISSN 0706-652X 1205-7533
op_rights http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining
op_doi https://doi.org/10.1139/f82-146
container_title Canadian Journal of Fisheries and Aquatic Sciences
container_volume 39
container_issue 8
container_start_page 1084
op_container_end_page 1094
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