Influence of Reduced Feed Ration on Lepeophtheirus salmonis Infestation and Inflammatory Gene Expression in Juvenile Pink Salmon
Abstract The effect of reduced feed ration on infestation levels with the sea louse Lepeophtheirus salmonis and gene expression in juvenile pink salmon Oncorhynchus gorbuscha was tested in three laboratory trials. Body weight was significantly lower among fish on the reduced ration for 27, 34, or 65...
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crwiley:10.1577/h07-014.1 2023-12-03T10:28:35+01:00 Influence of Reduced Feed Ration on Lepeophtheirus salmonis Infestation and Inflammatory Gene Expression in Juvenile Pink Salmon Jones, Simon R. M. Fast, Mark D. Johnson, Stewart C. 2008 http://dx.doi.org/10.1577/h07-014.1 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1577/H07-014.1 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Aquatic Animal Health volume 20, issue 2, page 103-109 ISSN 0899-7659 1548-8667 Aquatic Science journal-article 2008 crwiley https://doi.org/10.1577/h07-014.1 2023-11-09T13:47:36Z Abstract The effect of reduced feed ration on infestation levels with the sea louse Lepeophtheirus salmonis and gene expression in juvenile pink salmon Oncorhynchus gorbuscha was tested in three laboratory trials. Body weight was significantly lower among fish on the reduced ration for 27, 34, or 65 d than fish on the full ration. Neither the prevalence nor the abundance of L. salmonis differed between fish on full and reduced rations at any time in any trial. In trial 2, sea louse rejection was delayed among fish on reduced rations; however, the parasite was ultimately rejected from all fish in this trial regardless of ration. Proinflammatory gene expression in salmon exposed to L. salmonis was modulated by reduced rations. There was a reduction in the expression of interleukin‐8 in pink salmon on reduced rations 7 d after exposure but not 14 d after exposure. In contrast, the 7‐d expression of interleukin‐1 beta (IL‐1β) was reduced in exposed pink salmon regardless of ration. By day 14, however, expression of IL‐1β was increased in association with reduced rations among exposed salmon. Similarly, the expression of tumor necrosis factor alpha (TNFα) was increased 14 d after exposure among salmon on a reduced ration. There was no evidence that short‐duration exposure of otherwise healthy juvenile pink salmon to a reduced ration affected susceptibility to L. salmonis . The expression data do not suggest an obvious mechanism of louse rejection; rather, they indicate that a more comprehensive suite of inflammatory pathways should be surveyed to better understand the early pink salmon response to L. salmonis. Article in Journal/Newspaper Oncorhynchus gorbuscha Pink salmon Wiley Online Library (via Crossref) Journal of Aquatic Animal Health 20 2 103 109 |
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English |
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Aquatic Science |
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Aquatic Science Jones, Simon R. M. Fast, Mark D. Johnson, Stewart C. Influence of Reduced Feed Ration on Lepeophtheirus salmonis Infestation and Inflammatory Gene Expression in Juvenile Pink Salmon |
topic_facet |
Aquatic Science |
description |
Abstract The effect of reduced feed ration on infestation levels with the sea louse Lepeophtheirus salmonis and gene expression in juvenile pink salmon Oncorhynchus gorbuscha was tested in three laboratory trials. Body weight was significantly lower among fish on the reduced ration for 27, 34, or 65 d than fish on the full ration. Neither the prevalence nor the abundance of L. salmonis differed between fish on full and reduced rations at any time in any trial. In trial 2, sea louse rejection was delayed among fish on reduced rations; however, the parasite was ultimately rejected from all fish in this trial regardless of ration. Proinflammatory gene expression in salmon exposed to L. salmonis was modulated by reduced rations. There was a reduction in the expression of interleukin‐8 in pink salmon on reduced rations 7 d after exposure but not 14 d after exposure. In contrast, the 7‐d expression of interleukin‐1 beta (IL‐1β) was reduced in exposed pink salmon regardless of ration. By day 14, however, expression of IL‐1β was increased in association with reduced rations among exposed salmon. Similarly, the expression of tumor necrosis factor alpha (TNFα) was increased 14 d after exposure among salmon on a reduced ration. There was no evidence that short‐duration exposure of otherwise healthy juvenile pink salmon to a reduced ration affected susceptibility to L. salmonis . The expression data do not suggest an obvious mechanism of louse rejection; rather, they indicate that a more comprehensive suite of inflammatory pathways should be surveyed to better understand the early pink salmon response to L. salmonis. |
format |
Article in Journal/Newspaper |
author |
Jones, Simon R. M. Fast, Mark D. Johnson, Stewart C. |
author_facet |
Jones, Simon R. M. Fast, Mark D. Johnson, Stewart C. |
author_sort |
Jones, Simon R. M. |
title |
Influence of Reduced Feed Ration on Lepeophtheirus salmonis Infestation and Inflammatory Gene Expression in Juvenile Pink Salmon |
title_short |
Influence of Reduced Feed Ration on Lepeophtheirus salmonis Infestation and Inflammatory Gene Expression in Juvenile Pink Salmon |
title_full |
Influence of Reduced Feed Ration on Lepeophtheirus salmonis Infestation and Inflammatory Gene Expression in Juvenile Pink Salmon |
title_fullStr |
Influence of Reduced Feed Ration on Lepeophtheirus salmonis Infestation and Inflammatory Gene Expression in Juvenile Pink Salmon |
title_full_unstemmed |
Influence of Reduced Feed Ration on Lepeophtheirus salmonis Infestation and Inflammatory Gene Expression in Juvenile Pink Salmon |
title_sort |
influence of reduced feed ration on lepeophtheirus salmonis infestation and inflammatory gene expression in juvenile pink salmon |
publisher |
Wiley |
publishDate |
2008 |
url |
http://dx.doi.org/10.1577/h07-014.1 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1577/H07-014.1 |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_source |
Journal of Aquatic Animal Health volume 20, issue 2, page 103-109 ISSN 0899-7659 1548-8667 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1577/h07-014.1 |
container_title |
Journal of Aquatic Animal Health |
container_volume |
20 |
container_issue |
2 |
container_start_page |
103 |
op_container_end_page |
109 |
_version_ |
1784253345431552000 |