Cryptic hydrozoan blooms pose risks to gill health in farmed North Atlantic salmon ( Salmo salar)
Sampling at four salmon aquaculture sites along the west coast of Scotland has identified short-lived aggregations of planktonic hydrozoans (>280 individuals m −3 ), here termed blooms. Several such blooms were linked with increases in gill pathology and mortality in caged fish. Two types, Obelia...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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Cambridge University Press (CUP)
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Online Access: | http://dx.doi.org/10.1017/s002531541800022x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002531541800022X |
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crcambridgeupr:10.1017/s002531541800022x 2024-10-13T14:06:07+00:00 Cryptic hydrozoan blooms pose risks to gill health in farmed North Atlantic salmon ( Salmo salar) Kintner, Anna Brierley, Andrew S. 2018 http://dx.doi.org/10.1017/s002531541800022x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002531541800022X en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 99, issue 2, page 539-550 ISSN 0025-3154 1469-7769 journal-article 2018 crcambridgeupr https://doi.org/10.1017/s002531541800022x 2024-09-18T04:01:55Z Sampling at four salmon aquaculture sites along the west coast of Scotland has identified short-lived aggregations of planktonic hydrozoans (>280 individuals m −3 ), here termed blooms. Several such blooms were linked with increases in gill pathology and mortality in caged fish. Two types, Obelia sp. and Lizzia blondina , were found to cause blooms regularly and often concurrently. Species composition of hydrozoan populations and fluctuations in population sizes were spatially and temporally heterogeneous, with adjacent sites (within 30 km of one another and with similar oceanic exposure) experiencing no correlation between species composition and population density. Blooms appeared temperature-mediated, with all identified blooms by Obelia sp. and L. blondina taking place in water above 12 °C; however, temperature alone was not found to be predictive. Blooms were not significantly associated with change in salinity, water clarity, or photoperiod. Due to the apparent lack of broadly applicable predictors, we suggest that localized, targeted sampling and examination of planktonic hydrozoan populations is required to discern the presence or absence of a bloom. It is likely that many blooms have historically caused harm in salmon aquaculture while remaining unrecognized as the root cause. Article in Journal/Newspaper Atlantic salmon North Atlantic Salmo salar Cambridge University Press Journal of the Marine Biological Association of the United Kingdom 99 2 539 550 |
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Open Polar |
collection |
Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Sampling at four salmon aquaculture sites along the west coast of Scotland has identified short-lived aggregations of planktonic hydrozoans (>280 individuals m −3 ), here termed blooms. Several such blooms were linked with increases in gill pathology and mortality in caged fish. Two types, Obelia sp. and Lizzia blondina , were found to cause blooms regularly and often concurrently. Species composition of hydrozoan populations and fluctuations in population sizes were spatially and temporally heterogeneous, with adjacent sites (within 30 km of one another and with similar oceanic exposure) experiencing no correlation between species composition and population density. Blooms appeared temperature-mediated, with all identified blooms by Obelia sp. and L. blondina taking place in water above 12 °C; however, temperature alone was not found to be predictive. Blooms were not significantly associated with change in salinity, water clarity, or photoperiod. Due to the apparent lack of broadly applicable predictors, we suggest that localized, targeted sampling and examination of planktonic hydrozoan populations is required to discern the presence or absence of a bloom. It is likely that many blooms have historically caused harm in salmon aquaculture while remaining unrecognized as the root cause. |
format |
Article in Journal/Newspaper |
author |
Kintner, Anna Brierley, Andrew S. |
spellingShingle |
Kintner, Anna Brierley, Andrew S. Cryptic hydrozoan blooms pose risks to gill health in farmed North Atlantic salmon ( Salmo salar) |
author_facet |
Kintner, Anna Brierley, Andrew S. |
author_sort |
Kintner, Anna |
title |
Cryptic hydrozoan blooms pose risks to gill health in farmed North Atlantic salmon ( Salmo salar) |
title_short |
Cryptic hydrozoan blooms pose risks to gill health in farmed North Atlantic salmon ( Salmo salar) |
title_full |
Cryptic hydrozoan blooms pose risks to gill health in farmed North Atlantic salmon ( Salmo salar) |
title_fullStr |
Cryptic hydrozoan blooms pose risks to gill health in farmed North Atlantic salmon ( Salmo salar) |
title_full_unstemmed |
Cryptic hydrozoan blooms pose risks to gill health in farmed North Atlantic salmon ( Salmo salar) |
title_sort |
cryptic hydrozoan blooms pose risks to gill health in farmed north atlantic salmon ( salmo salar) |
publisher |
Cambridge University Press (CUP) |
publishDate |
2018 |
url |
http://dx.doi.org/10.1017/s002531541800022x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002531541800022X |
genre |
Atlantic salmon North Atlantic Salmo salar |
genre_facet |
Atlantic salmon North Atlantic Salmo salar |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 99, issue 2, page 539-550 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s002531541800022x |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
99 |
container_issue |
2 |
container_start_page |
539 |
op_container_end_page |
550 |
_version_ |
1812812172403671040 |