Data from: Maternal effects in vulnerability to eye-parasites and correlations between behaviour and parasitism in juvenile Arctic charr ...

• Main Authors: Kortet, Raine, Lautala, Tiina, Kekäläinen, Jukka, Taskinen, Jouni, Hirvonen, Heikki
• Format: Dataset
• Language: English
• Published: Dryad 2017
• Subjects: Arctic; Arctic charr; Salvelinus alpinus
• Online Access: https://dx.doi.org/10.5061/dryad.8c1vd; https://datadryad.org/stash/dataset/doi:10.5061/dryad.8c1vd

Hatchery-reared fish show high mortalities after release to the wild environment. Explanations for this include potentially predetermined genetics, behavioural and physiological acclimation to fish farm environments, and increased vulnerability to predation and parasitism in the wild. We studied vulnerability to Diplostomum spp. parasites (load of eye-flukes in the lenses), immune defence (relative spleen size) and anti-predator behaviours (approaches toward predator odour, freezing, and swimming activity) in hatchery-reared juvenile Arctic charr (Salvelinus alpinus) using a nested mating design. Fish were exposed to eye-fluke larvae via the incoming water at the hatchery. Fish size was positively associated with parasite load, but we did not find any relationship between relative spleen size and parasitism. The offspring of different females showed significant variation in their parasite load within sires, implying a dam effect in the vulnerability to parasites. However, the family background did not have ... : Nieriä_data_DryadArctic charr data from experiments conducted in Enonkoski in 2005. ...