Development of the salmon louse Lepeophtheirus salmonis parasitic stages in temperatures ranging from 3 to 24°C
The development rate of the salmon louse Lepeophtheirus salmonis is greatly influenced by seawater temperature. This study describes how the growth rate of L. salmonis changes with temperature and identifies the extreme high and low temperatures at which development to the adult stage is compromised...
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ftunivbergen:oai:bora.uib.no:1956/20967 2023-05-15T15:32:50+02:00 Development of the salmon louse Lepeophtheirus salmonis parasitic stages in temperatures ranging from 3 to 24°C Hamre, Lars Are Bui, Samantha Oppedal, Frode Skern-Mauritzen, Rasmus Dalvin, Sussie 2019-09-20T11:50:12Z application/pdf http://hdl.handle.net/1956/20967 https://doi.org/10.3354/aei00320 eng eng Inter-Research Norges forskningsråd: 294730 Fiskeri- og havbruksnæringens forskningsfond: 901283 urn:issn:1869-215X urn:issn:1869-7534 http://hdl.handle.net/1956/20967 https://doi.org/10.3354/aei00320 cristin:1725510 Attribution CC BY http://creativecommons.org/licenses/by/4.0/ Copyright The Author(s) 2019 Aquaculture Environment Interactions Salmo Salar Molt rate Thermal tolerance Reproduction Lepeophtheirus salmonis Poikilotherm Ecdysis Peer reviewed Journal article 2019 ftunivbergen https://doi.org/10.3354/aei00320 2023-03-14T17:44:24Z The development rate of the salmon louse Lepeophtheirus salmonis is greatly influenced by seawater temperature. This study describes how the growth rate of L. salmonis changes with temperature and identifies the extreme high and low temperatures at which development to the adult stage is compromised. Atlantic salmon Salmo salar were infected with copepodids and development was monitored in 8 temperature groups spanning 3 to 24°C until the lice were adults. Development was severely compromised at 3 and 24°C, while the lice developed normally in the temperature range from 6 to 21°C. At 6°C, most female lice had become adults at 72 d post infection (432 degree-days). At 21°C, development was significantly faster and most females were adults after 13 d, at only 271 degree-days. After infection, lice grew through 5 stages before reaching the adult stage, all of which, with a few exceptions, appeared to last approximately equally long. Thus, a simple model describing the mean daily growth rate (stages per day) as a function of temperature was made for each sex. The relationship between mean daily growth rate and temperature was best described by a second-order polynomial. The term relative age is introduced and used to describe the pattern of development in terms of percent of total development time to the adult stage. This was applied to calculate the timing of developmental events as a function of temperature. Photoperiod and development under rising or decreasing temperatures had minor effects on development rate. publishedVersion Article in Journal/Newspaper Atlantic salmon Salmo salar University of Bergen: Bergen Open Research Archive (BORA-UiB) Aquaculture Environment Interactions 11 429 443 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Salmo Salar Molt rate Thermal tolerance Reproduction Lepeophtheirus salmonis Poikilotherm Ecdysis |
spellingShingle |
Salmo Salar Molt rate Thermal tolerance Reproduction Lepeophtheirus salmonis Poikilotherm Ecdysis Hamre, Lars Are Bui, Samantha Oppedal, Frode Skern-Mauritzen, Rasmus Dalvin, Sussie Development of the salmon louse Lepeophtheirus salmonis parasitic stages in temperatures ranging from 3 to 24°C |
topic_facet |
Salmo Salar Molt rate Thermal tolerance Reproduction Lepeophtheirus salmonis Poikilotherm Ecdysis |
description |
The development rate of the salmon louse Lepeophtheirus salmonis is greatly influenced by seawater temperature. This study describes how the growth rate of L. salmonis changes with temperature and identifies the extreme high and low temperatures at which development to the adult stage is compromised. Atlantic salmon Salmo salar were infected with copepodids and development was monitored in 8 temperature groups spanning 3 to 24°C until the lice were adults. Development was severely compromised at 3 and 24°C, while the lice developed normally in the temperature range from 6 to 21°C. At 6°C, most female lice had become adults at 72 d post infection (432 degree-days). At 21°C, development was significantly faster and most females were adults after 13 d, at only 271 degree-days. After infection, lice grew through 5 stages before reaching the adult stage, all of which, with a few exceptions, appeared to last approximately equally long. Thus, a simple model describing the mean daily growth rate (stages per day) as a function of temperature was made for each sex. The relationship between mean daily growth rate and temperature was best described by a second-order polynomial. The term relative age is introduced and used to describe the pattern of development in terms of percent of total development time to the adult stage. This was applied to calculate the timing of developmental events as a function of temperature. Photoperiod and development under rising or decreasing temperatures had minor effects on development rate. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Hamre, Lars Are Bui, Samantha Oppedal, Frode Skern-Mauritzen, Rasmus Dalvin, Sussie |
author_facet |
Hamre, Lars Are Bui, Samantha Oppedal, Frode Skern-Mauritzen, Rasmus Dalvin, Sussie |
author_sort |
Hamre, Lars Are |
title |
Development of the salmon louse Lepeophtheirus salmonis parasitic stages in temperatures ranging from 3 to 24°C |
title_short |
Development of the salmon louse Lepeophtheirus salmonis parasitic stages in temperatures ranging from 3 to 24°C |
title_full |
Development of the salmon louse Lepeophtheirus salmonis parasitic stages in temperatures ranging from 3 to 24°C |
title_fullStr |
Development of the salmon louse Lepeophtheirus salmonis parasitic stages in temperatures ranging from 3 to 24°C |
title_full_unstemmed |
Development of the salmon louse Lepeophtheirus salmonis parasitic stages in temperatures ranging from 3 to 24°C |
title_sort |
development of the salmon louse lepeophtheirus salmonis parasitic stages in temperatures ranging from 3 to 24°c |
publisher |
Inter-Research |
publishDate |
2019 |
url |
http://hdl.handle.net/1956/20967 https://doi.org/10.3354/aei00320 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Aquaculture Environment Interactions |
op_relation |
Norges forskningsråd: 294730 Fiskeri- og havbruksnæringens forskningsfond: 901283 urn:issn:1869-215X urn:issn:1869-7534 http://hdl.handle.net/1956/20967 https://doi.org/10.3354/aei00320 cristin:1725510 |
op_rights |
Attribution CC BY http://creativecommons.org/licenses/by/4.0/ Copyright The Author(s) 2019 |
op_doi |
https://doi.org/10.3354/aei00320 |
container_title |
Aquaculture Environment Interactions |
container_volume |
11 |
container_start_page |
429 |
op_container_end_page |
443 |
_version_ |
1766363320312397824 |