2022
DOI: 10.1111/jfb.15022
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Egg incubation temperature influences the population‐specific outmigration rate of juvenile brown troutSalmo trutta

Abstract: The present experiment tested if temperature during embryogenesis and parental heritage affected the migratory behaviour of young brown trout Salmo trutta. Two parental forms were used, a freshwater resident form and an anadromous form, both from the same river system but geographically isolated since 1993–95. Four groups of young S. trutta were produced and reared from (a) freshwater resident parents spawning in a tributary to the River Imsa, Norway, (b) anadromous parents spawning in the main stem of the sam… Show more

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Cited by 10 publications
(9 citation statements)
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“…Thus, the complex response of egg size to natural selection in wild populations of salmonids remains an evolutionary puzzle. Because ecological factors are important determinants of egg size and fitness of juvenile salmonids (e.g., Cogliati et al, 2018 ; Jonsson & Greenberg, 2022 ; Self et al, 2018 ), further work is needed to better characterize the environment both during maturation and during embryonic development.…”
Section: Discussionmentioning
confidence: 99%
“…Thus, the complex response of egg size to natural selection in wild populations of salmonids remains an evolutionary puzzle. Because ecological factors are important determinants of egg size and fitness of juvenile salmonids (e.g., Cogliati et al, 2018 ; Jonsson & Greenberg, 2022 ; Self et al, 2018 ), further work is needed to better characterize the environment both during maturation and during embryonic development.…”
Section: Discussionmentioning
confidence: 99%
“…As we no longer had these fish available to further explore the mechanism behind this difference in metabolic rates, we used brown trout from the same population raised at the same hatchery and under similar conditions in 2018-2019. These trout were used in several different studies, all focused on testing the effect of incubation temperature (2 temperatures) and parental cross (4 crosses) on the growth and behavior of juvenile fish [19][20][21]. In the study reported here, we limited ourselves to one cross, i.e., anadromous S. trutta, which were either incubated at ambient water (control) temperatures or at elevated temperatures (warm), approximately +2.7 • C above ambient water conditions [19][20][21].…”
Section: Rearing Of Fishmentioning
confidence: 99%
“…These trout were used in several different studies, all focused on testing the effect of incubation temperature (2 temperatures) and parental cross (4 crosses) on the growth and behavior of juvenile fish [19][20][21]. In the study reported here, we limited ourselves to one cross, i.e., anadromous S. trutta, which were either incubated at ambient water (control) temperatures or at elevated temperatures (warm), approximately +2.7 • C above ambient water conditions [19][20][21]. Below we describe the rearing conditions for the anadromous trout.…”
Section: Rearing Of Fishmentioning
confidence: 99%
“…Recently, variation in embryonic thermal conditions was inversely related to the metabolic rate of brown trout ( Salmo trutta ) juveniles (Durtsche et al, 2021). Moreover, warm‐incubated brown trout eggs produced juveniles that migrated in higher proportions than cold‐incubated individuals (Jonsson & Greenberg, 2021). Temperature has also been reported to reduce the growth rate of sea bass ( Dicentrarchus labrax ; Cadiz, Zambonino‐Infante, et al, 2018), and hypoxia itself has been related to the prevalence of opercular abnormalities in this species (Cadiz, Ernande, et al, 2018).…”
Section: Introductionmentioning
confidence: 99%