Feeding, egg production and egg hatching success of the copepods Acartia tonsa and Temora longicornis on diets of the toxic diatom Pseudo-nitzschia multiseries and the non-toxic diatom Pseudo-nitzschia pungens. Master of Science thesis
Abstract In 1987, there was an episode of shellfish poisoning in Canada with human fatalities caused by the diatom Pseudonitzschia multiseries, which produced the toxin domoic acid. In order to examine whether domoic acid in this diatom serves as a grazing deterrent for copepods, we compared feeding...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1086.6998 2023-05-15T18:49:39+02:00 Feeding, egg production and egg hatching success of the copepods Acartia tonsa and Temora longicornis on diets of the toxic diatom Pseudo-nitzschia multiseries and the non-toxic diatom Pseudo-nitzschia pungens. Master of Science thesis Jean A Lincoln Jefferson T Turner Stephen S Bates Claude Léger David A Gauthier The Pennsylvania State University CiteSeerX Archives 1998 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1086.6998 http://www.inter.dfo-mpo.gc.ca/folios/01017/docs/ref-337-34.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1086.6998 http://www.inter.dfo-mpo.gc.ca/folios/01017/docs/ref-337-34.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.inter.dfo-mpo.gc.ca/folios/01017/docs/ref-337-34.pdf text 1998 ftciteseerx 2020-05-24T00:15:35Z Abstract In 1987, there was an episode of shellfish poisoning in Canada with human fatalities caused by the diatom Pseudonitzschia multiseries, which produced the toxin domoic acid. In order to examine whether domoic acid in this diatom serves as a grazing deterrent for copepods, we compared feeding rates, egg production rates, egg hatching success and mortality of the calanoid copepods Acartia tonsa and Temora longicornis feeding on unialgal diets of the toxic diatom P. multiseries and the similarly-sized non-toxic diatom Pseudo-nitzschia pungens. Copepods were collected in summers of 1994, 1995 and 1996 from Shediac Bay, New Brunswick, Canada, near Prince Edward Island, the site of the 1987 episode of domoic acid shellfish poisoning. Rates of ingestion of the toxic versus the non-toxic diatom by A. tonsa and T. longicornis were similar, with only one significantly different pair of values obtained in 1994, for which A. tonsa had a higher mean rate of ingestion of the toxic than the non-toxic diatom. Thus, domoic acid did not appear to retard grazing. Analyses of copepods with high performance liquid chromatography (HPLC) revealed that copepods accumulated domoic acid when feeding on P. multiseries. Egg production rates of copepods when feeding on P. multiseries and P. pungens were very low, ranging from 0 to 2.79 eggs female −1 d −1 . There did not appear to be differential egg production or egg hatching success on diets of the toxic and non-toxic diatoms. Mortality of females on the toxic diet was low, ranging from 0 to 20%, with a mean of 13%, and there was no apparent difference between mortality of copepods feeding on toxic versus non-toxic diatoms. Egg hatching success on both diets, although based on few eggs, ranged between 22% and 76%, with a mean percentage hatching of 45%. Diets of the non-toxic diatom plus natural seawater assemblages supplemented with dissolved domoic acid, revealed similar rates and percentages when compared to previous experiments. In summary, none of the variables measured ... Text Copepods Prince Edward Island Unknown Canada |
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English |
description |
Abstract In 1987, there was an episode of shellfish poisoning in Canada with human fatalities caused by the diatom Pseudonitzschia multiseries, which produced the toxin domoic acid. In order to examine whether domoic acid in this diatom serves as a grazing deterrent for copepods, we compared feeding rates, egg production rates, egg hatching success and mortality of the calanoid copepods Acartia tonsa and Temora longicornis feeding on unialgal diets of the toxic diatom P. multiseries and the similarly-sized non-toxic diatom Pseudo-nitzschia pungens. Copepods were collected in summers of 1994, 1995 and 1996 from Shediac Bay, New Brunswick, Canada, near Prince Edward Island, the site of the 1987 episode of domoic acid shellfish poisoning. Rates of ingestion of the toxic versus the non-toxic diatom by A. tonsa and T. longicornis were similar, with only one significantly different pair of values obtained in 1994, for which A. tonsa had a higher mean rate of ingestion of the toxic than the non-toxic diatom. Thus, domoic acid did not appear to retard grazing. Analyses of copepods with high performance liquid chromatography (HPLC) revealed that copepods accumulated domoic acid when feeding on P. multiseries. Egg production rates of copepods when feeding on P. multiseries and P. pungens were very low, ranging from 0 to 2.79 eggs female −1 d −1 . There did not appear to be differential egg production or egg hatching success on diets of the toxic and non-toxic diatoms. Mortality of females on the toxic diet was low, ranging from 0 to 20%, with a mean of 13%, and there was no apparent difference between mortality of copepods feeding on toxic versus non-toxic diatoms. Egg hatching success on both diets, although based on few eggs, ranged between 22% and 76%, with a mean percentage hatching of 45%. Diets of the non-toxic diatom plus natural seawater assemblages supplemented with dissolved domoic acid, revealed similar rates and percentages when compared to previous experiments. In summary, none of the variables measured ... |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Jean A Lincoln Jefferson T Turner Stephen S Bates Claude Léger David A Gauthier |
spellingShingle |
Jean A Lincoln Jefferson T Turner Stephen S Bates Claude Léger David A Gauthier Feeding, egg production and egg hatching success of the copepods Acartia tonsa and Temora longicornis on diets of the toxic diatom Pseudo-nitzschia multiseries and the non-toxic diatom Pseudo-nitzschia pungens. Master of Science thesis |
author_facet |
Jean A Lincoln Jefferson T Turner Stephen S Bates Claude Léger David A Gauthier |
author_sort |
Jean A Lincoln |
title |
Feeding, egg production and egg hatching success of the copepods Acartia tonsa and Temora longicornis on diets of the toxic diatom Pseudo-nitzschia multiseries and the non-toxic diatom Pseudo-nitzschia pungens. Master of Science thesis |
title_short |
Feeding, egg production and egg hatching success of the copepods Acartia tonsa and Temora longicornis on diets of the toxic diatom Pseudo-nitzschia multiseries and the non-toxic diatom Pseudo-nitzschia pungens. Master of Science thesis |
title_full |
Feeding, egg production and egg hatching success of the copepods Acartia tonsa and Temora longicornis on diets of the toxic diatom Pseudo-nitzschia multiseries and the non-toxic diatom Pseudo-nitzschia pungens. Master of Science thesis |
title_fullStr |
Feeding, egg production and egg hatching success of the copepods Acartia tonsa and Temora longicornis on diets of the toxic diatom Pseudo-nitzschia multiseries and the non-toxic diatom Pseudo-nitzschia pungens. Master of Science thesis |
title_full_unstemmed |
Feeding, egg production and egg hatching success of the copepods Acartia tonsa and Temora longicornis on diets of the toxic diatom Pseudo-nitzschia multiseries and the non-toxic diatom Pseudo-nitzschia pungens. Master of Science thesis |
title_sort |
feeding, egg production and egg hatching success of the copepods acartia tonsa and temora longicornis on diets of the toxic diatom pseudo-nitzschia multiseries and the non-toxic diatom pseudo-nitzschia pungens. master of science thesis |
publishDate |
1998 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1086.6998 http://www.inter.dfo-mpo.gc.ca/folios/01017/docs/ref-337-34.pdf |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Copepods Prince Edward Island |
genre_facet |
Copepods Prince Edward Island |
op_source |
http://www.inter.dfo-mpo.gc.ca/folios/01017/docs/ref-337-34.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1086.6998 http://www.inter.dfo-mpo.gc.ca/folios/01017/docs/ref-337-34.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766243254704013312 |