Adaptation to salinity in Atlantic cod from different regions of the Baltic Sea

Kijewska, Agnieszka; Kalamarz-Kubiak, Hanna; Arciszewski, Bartłomiej; Guellard, Tatiana; Petereit, Christoph; Wenne, Roman

doi:10.1016/j.jembe.2016.02.003

Cited by 20 publications

(15 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar to other marine fishes adapted to the low salinity waters of the Baltic (e.g. Kijewska et al, 2016), P. flesus shows adaptations in egg density. Eggs produced in the Baltic Sea are larger and with thinner chorions and have lower specific gravities than those in the North Sea, enabling them to achieve neutral buoyancy in low-salinity waters (Lønning and Solemdal, 1972;Nissling et al, 2002).…”

Section: From Ecology To Genetics-discovery Of Cryptic Ecological Spesupporting

confidence: 61%

From ecology to genetics and back: the tale of two flounder species in the Baltic Sea

Jokinen

Momigliano

Merilä

2019

ICES Journal of Marine Science

View full text Add to dashboard Cite

Recent years have brought the realization that evolutionary changes driven by selection can occur in ecological time scales. However, recent evolutionary events can be hard to detect and may easily go unnoticed. For harvested species, such cryptic diversity may lead to suboptimal management. These points are illustrated by the two flounder species in the Baltic Sea. Although early ecological studies identified two ecotypes of European flounder (Platichthys flesus) based on spawning differences, genomic studies only recently demonstrated that they were reproductively isolated species, P. flesus and P. solemdali, separated through rapid ecologically driven speciation. These morphologically indistinguishable species are harvested within a mixed-stock fishery. In the northern Baltic Sea flounder landings have declined since the mid-1980s, with a drop in the Gulf of Finland (GoF) being particularly dramatic (∼90%). Genetic analyses of historical otolith samples from GoF catches have revealed that back in 1983 the fishery unknowingly targeted primarily P. flesus, whereas thereafter almost exclusively P. solemdali. Hence, the case of two flounder species illustrates (i) how ecological studies stimulated genetic investigations leading to discovery of ecological speciation and (ii) how cryptic species turnover discovered with genetic tools in turn improved ecological understanding with benefits to management and conservation.

show abstract

Section: From Ecology To Genetics-discovery Of Cryptic Ecological Spesupporting

confidence: 61%

From ecology to genetics and back: the tale of two flounder species in the Baltic Sea

Jokinen

Momigliano

Merilä

2019

ICES Journal of Marine Science

View full text Add to dashboard Cite

show abstract

“…Changes in salinity can impose physiological stress to euryhaline fishes (Kültz 2015, Kijewska et al 2016. Nonetheless, physiological adaptations and mechanisms allowing euryhaline fishes to successfully cope with different salinities are not fully explored, yet (Eliason & Farrell 2016).…”

Section: Introductionmentioning

confidence: 99%

Respiration rates of herring larvae at different salinities, and effects of previous environmental history

Berg

Andersson

Folkvord

2020

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Metabolic rates of early life history stages of marine fishes show considerable inter-individual differences, and are highly influenced by extrinsic factors like temperature or food availability. Measuring oxygen uptake rates is a proxy for estimating metabolic rates. Still, the relationship between respiration rates and ambient or previous salinity conditions as well as parental and developmental acclimation to changes in salinity remains largely unexplored. In the present study, we conducted experiments to investigate the effects of salinity on the routine metabolic rates (RMR) of euryhaline Atlantic herring Clupea harengus larvae at 3 levels of salinity: low (6 psu), intermediate (16 psu) and high (35 psu), reflecting ecologically relevant conditions for herring populations in the Atlantic Ocean and Baltic Sea. The larvae originated from different genetic backgrounds and salinity adaptations to account for cross-generation effects on metabolic rates. Closed respirometry carried out over 24 h on individual fish larvae generally confirmed near isometric respiration rates at all salinity regimes, with rates being 15.4% higher at 6 psu and 7.5% higher at 35 psu compared to 16 psu conditions. However, transgenerational acclimation to different salinity regimes of the parents had no effect on the salinity-specific metabolic rates of their offspring. Our study demonstrates the ability of herring to cope with a wide range of salinity conditions, irrespective of parental environmental history and genetic origin. This phenotypic plasticity is considered to be one of the main contributing factors to the success of herring as a widely distributed fish species in the North Atlantic and adjacent waters.

show abstract

“…In the process of adaptation to permanently lower salinity, the Baltic cod eggs have significantly higher buoyancy and spermatozoa mobility compared to fish from outside of the Baltic Sea 28 . Adaptation to specific environmental conditions (altered salinity levels) during seasonal and diurnal migrations is a vital and distinctive characteristic of the Baltic cod 19 , 29 .…”

Section: Introductionmentioning

confidence: 99%

Alternatively spliced variants in Atlantic cod (Gadus morhua) support response to variable salinity environment

Kijewska

Malachowicz

Wenne

2018

Sci Rep

Self Cite

View full text Add to dashboard Cite

Analysis of gill transcriptome of the Atlantic cod from the Baltic Sea demonstrated that alternatively spliced (AS) variants may be actively involved in the process of adaptation to altered salinity. Some AS variants of different genes, like phospholipase A2 group IVC (PLA2G4C), appeared only in fish exposed to altered salinity, while other isoforms of the same genes were present in all experimental groups. Novel sequence arrangements represent 89% of all AS in the Baltic cod compared to the Atlantic population. Profiles of modified pathways suggest that regulation by AS can afford specific changes of genes expressed in response to the environment. The AS variants appear to be involved in the response to stress by modifications of signalling in apoptosis pathways, an innate immunological response and pro-inflammatory process. Present results support the hypothesis that developing new AS variants could support genome complexity and reinforce the ability to fast adapt to local environments.

show abstract

Adaptation to salinity in Atlantic cod from different regions of the Baltic Sea

Cited by 20 publications

References 33 publications

From ecology to genetics and back: the tale of two flounder species in the Baltic Sea

From ecology to genetics and back: the tale of two flounder species in the Baltic Sea

Respiration rates of herring larvae at different salinities, and effects of previous environmental history

Alternatively spliced variants in Atlantic cod (Gadus morhua) support response to variable salinity environment

Contact Info

Product

Resources

About