Are European sea bass as euryhaline as expected? Intraspecific variation in freshwater tolerance

L'Honoré, Thibaut; Farcy, Émilie; Chatain, Béatrice; Gros, Romain; Ruelle, François; Sophie, Hermet; Blondeau‐Bidet, Eva; Naudet, Jeanne; Lorin‐Nebel, Catherine

doi:10.1007/s00227-019-3551-z

Cited by 13 publications

(6 citation statements)

References 111 publications

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“…The study of DNA methylation dynamics and its contribution to F I G U R E 8 Scatter plot of selected genes indicated in Table 1 showing differential expression and methylation in FW versus SW. vs GB). From previous studies we know that the gill epithelium is fully remodelled in juveniles in order to efficiently osmoregulate in FW following a 2-week salinity transfer (Blondeau-Bidet et al, 2019;L'Honoré et al, 2019). Gill DNA methylation is therefore particularly interesting to investigate at this time point in order to functionally link phenotypic responses (gene expression dynamics) to DNA methylation changes.…”

Section: Discussionmentioning

confidence: 99%

“…After 40 days, they were reared in recirculating seawater (SW; osmolality: 1208 mOsm kg −1 , Na + : 515 mmol L −1 , Cl − : 737 mmol L −1 ) under a 12/12 h light/dark photoperiod at 20°C. At the age of 8 months (13.59 ± 0.12 cm, 32.19 ± 2.62 g), some fish were transferred to brackish water (BW; osmolality: 475 mOsm kg −1 ) for 24 h and then transferred to dechlorinated tap fresh water (FW; osmolality: 8 mOsm kg −1 , Na + : 2 mmol L −1 , Cl − : 3.5 mmol L −1 ) for 2 weeks, as in L'Honoré et al (2019). In previous studies, juveniles at this age have been shown to be able to tolerate FW for several months (L'Honoré et al, 2019).…”

Section: Methodsmentioning

confidence: 99%

“…At the age of 8 months (13.59 ± 0.12 cm, 32.19 ± 2.62 g), some fish were transferred to brackish water (BW; osmolality: 475 mOsm kg −1 ) for 24 h and then transferred to dechlorinated tap fresh water (FW; osmolality: 8 mOsm kg −1 , Na + : 2 mmol L −1 , Cl − : 3.5 mmol L −1 ) for 2 weeks, as in L'Honoré et al (2019). In previous studies, juveniles at this age have been shown to be able to tolerate FW for several months (L'Honoré et al, 2019). Fish were raised in groups of 50 (in seawater) or 100 (in FW) individuals in order to form fish shoals, as European sea bass get stressed when raised individually or in too small groups.…”

Section: Methodsmentioning

confidence: 99%

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The role of salinity on genome‐wide DNA methylation dynamics in European sea bass gills

et al. 2023

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Epigenetic modifications, like DNA methylation, generate phenotypic diversity in fish and ultimately lead to adaptive evolutionary processes. Euryhaline marine species that migrate between salinity‐contrasted habitats have received little attention regarding the role of salinity on whole‐genome DNA methylation. Investigation of salinity‐induced DNA methylation in fish will help to better understand the potential role of this process in salinity acclimation. Using whole‐genome bisulfite sequencing, we compared DNA methylation patterns in European sea bass (Dicentrarchus labrax) juveniles in seawater and after freshwater transfer. We targeted the gill as a crucial organ involved in plastic responses to environmental changes. To investigate the function of DNA methylation in gills, we performed RNAseq and assessed DNA methylome‐transcriptome correlations. We showed a negative correlation between gene expression levels and DNA methylation levels in promoters, first introns and first exons. A significant effect of salinity on DNA methylation dynamics with an overall DNA hypomethylation in freshwater‐transferred fish compared to seawater controls was demonstrated. This suggests a role of DNA methylation changes in salinity acclimation. Genes involved in key functions as metabolism, ion transport and transepithelial permeability (junctional complexes) were differentially methylated and expressed between salinity conditions. Expression of genes involved in mitochondrial metabolism (tricarboxylic acid cycle) was increased, whereas the expression of DNA methyltransferases 3a was repressed. This study reveals novel links between DNA methylation, mainly in promoters and first exons/introns, and gene expression patterns following salinity change.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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The role of salinity on genome‐wide DNA methylation dynamics in European sea bass gills

et al. 2023

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“…193 In some studies, optimal growth of European seabass occurred in FW compared with 20, 30 and 40‰, 192,194 while another found that $30% of fish had phenotypes incompatible with FW tolerance including erratic swimming, isolation from the shoal, low reflexes and increased pigmentation. 195 In larvae, it was shown that a gradual increase from low (15‰) to high salinity (37‰) at 93 days postfertilisation increased the percentage of males (87%-93%), suggesting an effect of environmental salinity on sexual differentiation. 191 Striped bass (M. saxatilis) is an anadromous species native to the northeastern shores of North America.…”

Section: Temperate Bassesmentioning

confidence: 99%

Salinity tolerance of fishes: Experimental approaches and implications for aquaculture production

Seale,

Cao,

Chang

et al. 2024

Reviews in Aquaculture

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The life history, distribution and diversity of fishes are largely influenced by environmental salinity. Changes in salinity affect a range of physiological processes including metabolism, nutrition, reproduction and growth. Therefore, fish can be conditioned to environmental parameters most suitable for production, where distinct traits are optimised through species‐specific manipulation of salinities. The primary purpose of this review is to summarise the existing literature on the salinity tolerance of aquacultured fish. The various experimental approaches for determining salinity tolerance are compared, along with summarised information for key species employed in aquaculture, including their native distributions, life history stage and optimal salinity for survival and growth. The implications for production were assessed by considering the effects of salinity on growth, reproduction, management, disease mitigation and marketability.

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“…The European sea bass is a highly valuable species targeted by both commercial and recreational fisheries. The species is considered euryhaline and is a marine migrant that spawns at sea and uses transitional habitats like coastal lagoons and estuaries as nursery and feeding grounds (e.g., Elliott et al, 2007; L'Honoré et al, 2019; Pawson et al, 2007). The coexistence of sea bass residents and seasonal migrants has been described using tagging methodologies in different areas throughout the species distribution (Pontual et al, 2019; Stamp et al, 2021).…”

Section: Figurementioning

confidence: 99%

Not so much a sea bass: Divergent European sea bass (Dicentrarchus labrax L.) freshwater incursions

Almeida,

Tanner,

Mateus

et al. 2023

Journal of Fish Biology

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European sea bass (Dicentrarchus labrax [Linnaeus, 1758]) is a euryhaline marine migrant fish highly valuable for fisheries and aquaculture. Although juveniles are known to use estuaries and occasionally move to freshwater environments, these freshwater incursions had not been reported for adults. Recently, this behavior was observed in the Tagus River (Portugal) for adults occurring up to 150 km from the river mouth, about 80 km upstream from the tidal influence, suggesting the existence of a freshwater contingent. Fisheries management of sea bass should consider the putative existence of a freshwater contingent.

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Are European sea bass as euryhaline as expected? Intraspecific variation in freshwater tolerance

Cited by 13 publications

References 111 publications

The role of salinity on genome‐wide DNA methylation dynamics in European sea bass gills

The role of salinity on genome‐wide DNA methylation dynamics in European sea bass gills

Salinity tolerance of fishes: Experimental approaches and implications for aquaculture production

Not so much a sea bass: Divergent European sea bass (Dicentrarchus labrax L.) freshwater incursions

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