The successful transfer of farmed post-smolt Atlantic salmon (Salmo salar) depends on proper stress responses and cognitive functions during the early seawater (SW) phase. However, with increasing summer oceanic temperatures, these processes may become a challenge, implicating allostasis and welfare. Therefore, we examined the effect of post-smolt transfer from 10°C SW to elevated temperatures (13°C, 16°C, and 18°C) on plasma...

In order to investigate how changes in gill Na + , K + ‐ ATPase ( NKA ) α1a and α1b subunits, Na + , K + , 2Cl − co‐transporter ( NKCC1 ) and the apical cystic fibrosis trans‐membrane conductance regulator‐I ( CFTR ‐I) transcripts in wild strain of Atlantic salmon, Salmo salar , smolts are affected by temperature during spring, hatchery‐reared parr (mean ± s.e . fork length = 14·1 ± 0·5; mean ± s.e . body mass = 28·5 ± 4·5 g)...

High levels of hybridization between Atlantic salmon Salmo salar and brown trout Salmo trutta have been reported in the River Driva. This study presents the underlying mechanisms of development of seawater (SW) tolerance and marine migration pattern for S. salar × S. trutta hybrids. Migrating S. salar × S. trutta hybrid smolts caught in the River Driva, Norway (a river containing Gyrodactylus salaris ), displayed freshwater (F...

Most fishes experiencing challenging environments are able to adjust and adapt their physiology and behaviour to help them cope more effectively. Much of this flexibility is supported and influenced by cognition and neural plasticity. The understanding of fish cognition and the role played by different regions of the brain has improved significantly in recent years. Techniques such as lesioning, tract tracing and quantifying c...