Transgenerational effects on body size and survival in Brook charr (<i>Salvelinus fontinalis</i>)

Houle, Carolyne; Gossieaux, Philippine; Bernatchez, Louis; Audet, Céline; Garant, Dany

doi:10.1111/eva.13553

Evolutionary Applications

2023

DOI: 10.1111/eva.13553

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Transgenerational effects on body size and survival in Brook charr (Salvelinus fontinalis)

Carolyne Houle

Philippine Gossieaux

Louis Bernatchez

et al.

Abstract: Higher temperatures are now observed in several ecosystems and act as new selective agents that shape traits and fitness of individuals. Transgenerational effects may be important in modulating adaptation of future generations and buffering negative impacts of temperature changes. The potential for these effects may be important in

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Cited by 2 publications

References 49 publications

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Metabolic and transcriptomic response of two juvenile anadromous brook charr (Salvelinus fontinalis) genetic lines towards a chronic thermal stress

Jourdain-Bonneau,

Deslauriers,

Gourtay

et al. 2023

Can. J. Zool.

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Many salmonid species are particularly susceptible to chronic and acute temperature changes caused by global warming. We aimed to study the differences in metabolic and transcriptomic responses of a chronic heat stress on a control and selected (absence of early sexual maturation and growth) line of brook charr Salvelinus fontinalis (Mitchill, 1814). We exposed individuals to different temperatures for 35 days (15, 17 and 19 °C). High temperature reduced the growth rate (in length) and the Fulton condition factor. Both maximal metabolic rate and the aerobic scope were higher in fish reared at 17 °C, while they decreased in fish maintained at 19 °C. The relative gene expression of cytochrome c oxidase was lower at 19 °C than at 15 °C. The relative gene expressions of both liver and gill hsp90 was higher at the highest temperature. The standard metabolic rate, while not affected by temperature, was higher for the control line over the selected line. Only in the control line, the relative expression of catalase and of receptor of insulin-like growth factor-1 increased at 19 °C. Our results showed that the selected line was able to cope more effectively with the oxidative stress caused by the rise in temperature.

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Metabolic and transcriptomic response of two juvenile anadromous brook charr (Salvelinus fontinalis) genetic lines towards a chronic thermal stress

Jourdain-Bonneau,

Deslauriers,

Gourtay

et al. 2023

Can. J. Zool.

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Selection effects on early life history traits and thermal resistance in brook charr Salvelinus fontinalis

Gourtay,

Rivolet,

Ghinter

et al. 2024

Can. J. Zool.

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In the context of climate change, it is crucial to understand whether animals that have been domesticated and/or selected maintain their abilities to adapt to changes in their thermal environment. Here, we tested how selection for absence of early sexual maturation combined with better growth performance may have impacted thermal resistance and gene expression response in the presence of thermal stress in brook charr Salvelinus fontinalis (Mitchill, 1814). We performed temperature challenge tests on brook charr 0+ juveniles and studied the expression of genes involved in the response to oxidative stress, in synthesis of heat shock proteins, or involved in regulation of apoptosis, in heart and liver tissues. Juveniles from the selected lineage had a higher thermal resistance than controls and a loss of equilibrium occurred on average 1°C above what was observed for the controls. The relative expressions of catalase and HSP70 were significantly higher in juveniles from the selection program. Overall, thermally sensitive fish were characterized by low mass and length and lower relative expressions of genes associated with stress response. Our results indicate that selection for traits of interests may be indirectly related to the significant lineage effect on growth in early stages of development.

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Transgenerational effects on body size and survival in Brook charr (Salvelinus fontinalis)

Cited by 2 publications

References 49 publications

Metabolic and transcriptomic response of two juvenile anadromous brook charr (Salvelinus fontinalis) genetic lines towards a chronic thermal stress

Metabolic and transcriptomic response of two juvenile anadromous brook charr (Salvelinus fontinalis) genetic lines towards a chronic thermal stress

Selection effects on early life history traits and thermal resistance in brook charr Salvelinus fontinalis

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