Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr
The effects of early thermal environment on growth, age at maturity, and sexual size dimorphism in Arctic charr (Salvelinus alpinus) are investigated. This study is a 654-day long rearing trial split into two sequential experimental phases termed EP1 and EP2 and lasting 315 and 339 days, respectivel...
Published in: | Journal of Marine Science and Engineering |
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Language: | English |
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Online Access: | https://hdl.handle.net/10037/26511 https://doi.org/10.3390/jmse10020167 |
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ftunivtroemsoe:oai:munin.uit.no:10037/26511 2023-05-15T14:25:17+02:00 Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr Árnason, Tómas Smáradóttir, Heiðdís Thorarensen, Helgi Steinarsson, Agnar 2022-01-27 https://hdl.handle.net/10037/26511 https://doi.org/10.3390/jmse10020167 eng eng MDPI Journal of Marine Science and Engineering Árnason, Smáradóttir, Thorarensen, Steinarsson. Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr. Journal of Marine Science and Engineering. 2022;10(2) FRIDAID 2025600 doi:10.3390/jmse10020167 2077-1312 https://hdl.handle.net/10037/26511 openAccess Copyright 2022 The Author(s) Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2022 ftunivtroemsoe https://doi.org/10.3390/jmse10020167 2022-09-07T23:00:13Z The effects of early thermal environment on growth, age at maturity, and sexual size dimorphism in Arctic charr (Salvelinus alpinus) are investigated. This study is a 654-day long rearing trial split into two sequential experimental phases termed EP1 and EP2 and lasting 315 and 339 days, respectively. EP1 started at the end of the yolk sac stage when the experimental fish were divided into three groups and reared at different target temperatures (7, 10 and 12 ◦C). During EP2, all groups were reared at the same temperature (7–8 ◦C) until harvest (~1300 g). Growth rates increased with temperature from 7 to 12 ◦C, and at the end of EP1 the 12C group had 49.0% and 19.2% higher mean weight than groups 7C and 10C, respectively. Elevated early rearing temperatures were, however, found to cause precocious sexual maturation and reduce the long-term growth performance. At the end of EP2, the 7C group had 3.6% and 14.1% higher mean weight than 10C and 12C, respectively. Elevated early rearing temperatures had a much stronger effect on the maturity incidence of females, and while male-biased sexual size dimorphism (SSD) was found in all groups, the magnitude of SSD was positively associated with temperature. Article in Journal/Newspaper Arctic Arctic charr Arctic Salvelinus alpinus University of Tromsø: Munin Open Research Archive Arctic Journal of Marine Science and Engineering 10 2 167 |
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Open Polar |
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University of Tromsø: Munin Open Research Archive |
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ftunivtroemsoe |
language |
English |
description |
The effects of early thermal environment on growth, age at maturity, and sexual size dimorphism in Arctic charr (Salvelinus alpinus) are investigated. This study is a 654-day long rearing trial split into two sequential experimental phases termed EP1 and EP2 and lasting 315 and 339 days, respectively. EP1 started at the end of the yolk sac stage when the experimental fish were divided into three groups and reared at different target temperatures (7, 10 and 12 ◦C). During EP2, all groups were reared at the same temperature (7–8 ◦C) until harvest (~1300 g). Growth rates increased with temperature from 7 to 12 ◦C, and at the end of EP1 the 12C group had 49.0% and 19.2% higher mean weight than groups 7C and 10C, respectively. Elevated early rearing temperatures were, however, found to cause precocious sexual maturation and reduce the long-term growth performance. At the end of EP2, the 7C group had 3.6% and 14.1% higher mean weight than 10C and 12C, respectively. Elevated early rearing temperatures had a much stronger effect on the maturity incidence of females, and while male-biased sexual size dimorphism (SSD) was found in all groups, the magnitude of SSD was positively associated with temperature. |
format |
Article in Journal/Newspaper |
author |
Árnason, Tómas Smáradóttir, Heiðdís Thorarensen, Helgi Steinarsson, Agnar |
spellingShingle |
Árnason, Tómas Smáradóttir, Heiðdís Thorarensen, Helgi Steinarsson, Agnar Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr |
author_facet |
Árnason, Tómas Smáradóttir, Heiðdís Thorarensen, Helgi Steinarsson, Agnar |
author_sort |
Árnason, Tómas |
title |
Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr |
title_short |
Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr |
title_full |
Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr |
title_fullStr |
Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr |
title_full_unstemmed |
Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr |
title_sort |
effects of early thermal environment on growth, age at maturity, and sexual size dimorphism in arctic charr |
publisher |
MDPI |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/26511 https://doi.org/10.3390/jmse10020167 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic Arctic charr Arctic Salvelinus alpinus |
op_relation |
Journal of Marine Science and Engineering Árnason, Smáradóttir, Thorarensen, Steinarsson. Effects of Early Thermal Environment on Growth, Age at Maturity, and Sexual Size Dimorphism in Arctic Charr. Journal of Marine Science and Engineering. 2022;10(2) FRIDAID 2025600 doi:10.3390/jmse10020167 2077-1312 https://hdl.handle.net/10037/26511 |
op_rights |
openAccess Copyright 2022 The Author(s) |
op_doi |
https://doi.org/10.3390/jmse10020167 |
container_title |
Journal of Marine Science and Engineering |
container_volume |
10 |
container_issue |
2 |
container_start_page |
167 |
_version_ |
1766297715034030080 |