Temperature effects on Pacific oyster embryos subjected to spent sulfite liquor
An exploratory study of 48-hour Pacific oyster embryo bioassays employing spent sulfite liquor (SSL) in test concentrations ranging from 10 to 45 ppm was made at two incubation temperatures, 20° and 24° C. Fourteen separate bioassays, each employing embryos originating from three to four different p...
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ftoregonstate:ir.library.oregonstate.edu:zg64tp98r 2024-09-15T18:29:04+00:00 Temperature effects on Pacific oyster embryos subjected to spent sulfite liquor Will, Theodore Dimick, Roland E. Fisheries and Wildlife Oregon State University. Graduate School https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/zg64tp98r English [eng] eng unknown Oregon State University https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/zg64tp98r Copyright Not Evaluated Oysters Embryology -- Mollusks Masters Thesis ftoregonstate 2024-07-22T18:06:06Z An exploratory study of 48-hour Pacific oyster embryo bioassays employing spent sulfite liquor (SSL) in test concentrations ranging from 10 to 45 ppm was made at two incubation temperatures, 20° and 24° C. Fourteen separate bioassays, each employing embryos originating from three to four different parentages, were conducted at the Yaquina Bay Laboratory during the summer of 1964. Comparative SSL bioassays at 20° and 24° C showed that significantly greater numbers of normal oyster larvae were always produced at an incubation temperature of 24° than at 20° (p < 0.01). In addition, the comparative median effective concentration (EC₅₀) values obtained from ten separate daily bioassays indicated that in each case the inimical affects of SSL were considerably less at 24° than at 20°. The calculated reductions in toxicity ranged from 17.1 to 60.3 percent, resulting in an average of 34.0 percent toxicity decrease. Further, 24° C incubated larvae were considerably more normal in appearance, and length measurements of larvae made from 20° and 24° control groups from the same parentage showed significantly larger sizes at 24°. A probable explanation of the cause for diminished inimical effects of SSL on Pacific oyster embryos when incubated at 24° C as compared to 20° is that the higher temperature was probably nearer the optimum for embryonic development of the species. Master Thesis Pacific oyster ScholarsArchive@OSU (Oregon State University) |
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ScholarsArchive@OSU (Oregon State University) |
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ftoregonstate |
language |
English unknown |
topic |
Oysters Embryology -- Mollusks |
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Oysters Embryology -- Mollusks Will, Theodore Temperature effects on Pacific oyster embryos subjected to spent sulfite liquor |
topic_facet |
Oysters Embryology -- Mollusks |
description |
An exploratory study of 48-hour Pacific oyster embryo bioassays employing spent sulfite liquor (SSL) in test concentrations ranging from 10 to 45 ppm was made at two incubation temperatures, 20° and 24° C. Fourteen separate bioassays, each employing embryos originating from three to four different parentages, were conducted at the Yaquina Bay Laboratory during the summer of 1964. Comparative SSL bioassays at 20° and 24° C showed that significantly greater numbers of normal oyster larvae were always produced at an incubation temperature of 24° than at 20° (p < 0.01). In addition, the comparative median effective concentration (EC₅₀) values obtained from ten separate daily bioassays indicated that in each case the inimical affects of SSL were considerably less at 24° than at 20°. The calculated reductions in toxicity ranged from 17.1 to 60.3 percent, resulting in an average of 34.0 percent toxicity decrease. Further, 24° C incubated larvae were considerably more normal in appearance, and length measurements of larvae made from 20° and 24° control groups from the same parentage showed significantly larger sizes at 24°. A probable explanation of the cause for diminished inimical effects of SSL on Pacific oyster embryos when incubated at 24° C as compared to 20° is that the higher temperature was probably nearer the optimum for embryonic development of the species. |
author2 |
Dimick, Roland E. Fisheries and Wildlife Oregon State University. Graduate School |
format |
Master Thesis |
author |
Will, Theodore |
author_facet |
Will, Theodore |
author_sort |
Will, Theodore |
title |
Temperature effects on Pacific oyster embryos subjected to spent sulfite liquor |
title_short |
Temperature effects on Pacific oyster embryos subjected to spent sulfite liquor |
title_full |
Temperature effects on Pacific oyster embryos subjected to spent sulfite liquor |
title_fullStr |
Temperature effects on Pacific oyster embryos subjected to spent sulfite liquor |
title_full_unstemmed |
Temperature effects on Pacific oyster embryos subjected to spent sulfite liquor |
title_sort |
temperature effects on pacific oyster embryos subjected to spent sulfite liquor |
publisher |
Oregon State University |
url |
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/zg64tp98r |
genre |
Pacific oyster |
genre_facet |
Pacific oyster |
op_relation |
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/zg64tp98r |
op_rights |
Copyright Not Evaluated |
_version_ |
1810470475896193024 |