Temperature response and salt tolerance of the opportunistic pathogen Saprolegnia parasitica: Implications for the broad whitefish subsistence fishery
We examined the effects of temperature and salt concentration on growth of the freshwater oomycete Saprolegnia parasitica that has recently (since 2013) been found to infect an important subsistence fish (in Iñupiaq, Aanaakłiq; broad whitefish, Coregonus nasus) on the Colville River in Nuiqsut, Alas...
Published in: | Arctic, Antarctic, and Alpine Research |
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Taylor & Francis Group
2021
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Online Access: | https://doi.org/10.1080/15230430.2021.1970340 https://doaj.org/article/119b243253c44d3c932710aaeb2c5d12 |
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ftdoajarticles:oai:doaj.org/article:119b243253c44d3c932710aaeb2c5d12 2023-05-15T14:14:31+02:00 Temperature response and salt tolerance of the opportunistic pathogen Saprolegnia parasitica: Implications for the broad whitefish subsistence fishery Todd L. Sformo Paul Y. de la Bastide Jonathon LeBlanc Geof H. Givens Billy Adams John C. Seigle Samuel C. Kunaknana Lawrence L. Moulton William E. Hintz 2021-01-01T00:00:00Z https://doi.org/10.1080/15230430.2021.1970340 https://doaj.org/article/119b243253c44d3c932710aaeb2c5d12 EN eng Taylor & Francis Group http://dx.doi.org/10.1080/15230430.2021.1970340 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 1523-0430 1938-4246 doi:10.1080/15230430.2021.1970340 https://doaj.org/article/119b243253c44d3c932710aaeb2c5d12 Arctic, Antarctic, and Alpine Research, Vol 53, Iss 1, Pp 271-285 (2021) arctic subsistence nuiqsut; temperature indigenous knowledge oomycete Environmental sciences GE1-350 Ecology QH540-549.5 article 2021 ftdoajarticles https://doi.org/10.1080/15230430.2021.1970340 2022-12-31T14:50:01Z We examined the effects of temperature and salt concentration on growth of the freshwater oomycete Saprolegnia parasitica that has recently (since 2013) been found to infect an important subsistence fish (in Iñupiaq, Aanaakłiq; broad whitefish, Coregonus nasus) on the Colville River in Nuiqsut, Alaska. Using two confirmed isolates (one from the Colville River and another from a southern British Columbia aquaculture facility), we tested the following hypotheses: (1) the isolate from Alaska will grow at a greater rate than the isolate from British Columbia at lower temperatures, (2) the isolate from British Columbia will grow at a greater rate at higher temperatures than the Alaska isolate, and (3) increasing salinity will reduce the growth rate of both isolates similarly at all temperatures. In addition, we used local observations—subsistence fishers and observations associated with scientific monitoring—to assist in interpreting the potential implications of our experimental results in the context of these environmental observations. In the habitat relevant to this study, water temperature ranges between <0°C and 18°C, and salinity ranges between 0 and 30 parts per thousand due to a seasonal (and occasional west wind-driven) saltwater intrusions. No statistically significant differences were detected in growth rate or salt tolerance between the two isolates at the temperatures and salinities tested; high temperature (24°C) and low salt concentration are associated with the highest growth rate for both isolates. From our lab study, one might conclude that the peak host colonization would occur during the seasonal period of warmest water temperature; however, the observations by local fishers and biologists show this not to be the case. We conclude that, at this time, we do not have evidence that peak warm water is the primary cause of an increased incidence of infection by this freshwater mold. Although indirect and lag analysis of temperature and timing of infection were not part of this study, we note that ... Article in Journal/Newspaper Antarctic and Alpine Research Arctic Arctic Alaska Directory of Open Access Journals: DOAJ Articles Arctic Arctic, Antarctic, and Alpine Research 53 1 271 285 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
arctic subsistence nuiqsut; temperature indigenous knowledge oomycete Environmental sciences GE1-350 Ecology QH540-549.5 |
spellingShingle |
arctic subsistence nuiqsut; temperature indigenous knowledge oomycete Environmental sciences GE1-350 Ecology QH540-549.5 Todd L. Sformo Paul Y. de la Bastide Jonathon LeBlanc Geof H. Givens Billy Adams John C. Seigle Samuel C. Kunaknana Lawrence L. Moulton William E. Hintz Temperature response and salt tolerance of the opportunistic pathogen Saprolegnia parasitica: Implications for the broad whitefish subsistence fishery |
topic_facet |
arctic subsistence nuiqsut; temperature indigenous knowledge oomycete Environmental sciences GE1-350 Ecology QH540-549.5 |
description |
We examined the effects of temperature and salt concentration on growth of the freshwater oomycete Saprolegnia parasitica that has recently (since 2013) been found to infect an important subsistence fish (in Iñupiaq, Aanaakłiq; broad whitefish, Coregonus nasus) on the Colville River in Nuiqsut, Alaska. Using two confirmed isolates (one from the Colville River and another from a southern British Columbia aquaculture facility), we tested the following hypotheses: (1) the isolate from Alaska will grow at a greater rate than the isolate from British Columbia at lower temperatures, (2) the isolate from British Columbia will grow at a greater rate at higher temperatures than the Alaska isolate, and (3) increasing salinity will reduce the growth rate of both isolates similarly at all temperatures. In addition, we used local observations—subsistence fishers and observations associated with scientific monitoring—to assist in interpreting the potential implications of our experimental results in the context of these environmental observations. In the habitat relevant to this study, water temperature ranges between <0°C and 18°C, and salinity ranges between 0 and 30 parts per thousand due to a seasonal (and occasional west wind-driven) saltwater intrusions. No statistically significant differences were detected in growth rate or salt tolerance between the two isolates at the temperatures and salinities tested; high temperature (24°C) and low salt concentration are associated with the highest growth rate for both isolates. From our lab study, one might conclude that the peak host colonization would occur during the seasonal period of warmest water temperature; however, the observations by local fishers and biologists show this not to be the case. We conclude that, at this time, we do not have evidence that peak warm water is the primary cause of an increased incidence of infection by this freshwater mold. Although indirect and lag analysis of temperature and timing of infection were not part of this study, we note that ... |
format |
Article in Journal/Newspaper |
author |
Todd L. Sformo Paul Y. de la Bastide Jonathon LeBlanc Geof H. Givens Billy Adams John C. Seigle Samuel C. Kunaknana Lawrence L. Moulton William E. Hintz |
author_facet |
Todd L. Sformo Paul Y. de la Bastide Jonathon LeBlanc Geof H. Givens Billy Adams John C. Seigle Samuel C. Kunaknana Lawrence L. Moulton William E. Hintz |
author_sort |
Todd L. Sformo |
title |
Temperature response and salt tolerance of the opportunistic pathogen Saprolegnia parasitica: Implications for the broad whitefish subsistence fishery |
title_short |
Temperature response and salt tolerance of the opportunistic pathogen Saprolegnia parasitica: Implications for the broad whitefish subsistence fishery |
title_full |
Temperature response and salt tolerance of the opportunistic pathogen Saprolegnia parasitica: Implications for the broad whitefish subsistence fishery |
title_fullStr |
Temperature response and salt tolerance of the opportunistic pathogen Saprolegnia parasitica: Implications for the broad whitefish subsistence fishery |
title_full_unstemmed |
Temperature response and salt tolerance of the opportunistic pathogen Saprolegnia parasitica: Implications for the broad whitefish subsistence fishery |
title_sort |
temperature response and salt tolerance of the opportunistic pathogen saprolegnia parasitica: implications for the broad whitefish subsistence fishery |
publisher |
Taylor & Francis Group |
publishDate |
2021 |
url |
https://doi.org/10.1080/15230430.2021.1970340 https://doaj.org/article/119b243253c44d3c932710aaeb2c5d12 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Antarctic and Alpine Research Arctic Arctic Alaska |
genre_facet |
Antarctic and Alpine Research Arctic Arctic Alaska |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 53, Iss 1, Pp 271-285 (2021) |
op_relation |
http://dx.doi.org/10.1080/15230430.2021.1970340 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 1523-0430 1938-4246 doi:10.1080/15230430.2021.1970340 https://doaj.org/article/119b243253c44d3c932710aaeb2c5d12 |
op_doi |
https://doi.org/10.1080/15230430.2021.1970340 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
53 |
container_issue |
1 |
container_start_page |
271 |
op_container_end_page |
285 |
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1766286940848521216 |