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...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
1982
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Online Access: | http://dx.doi.org/10.1139/f82-146 http://www.nrcresearchpress.com/doi/pdf/10.1139/f82-146 |
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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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1785581296451321856 |