Halvtidsseminarium med doktorand Nicklas Wallbom, institutionen för biologi och miljövetenskap
Nicklas doktorandprojekt fokuserar på fördelar och nackdelar med vaccinering av fisk i odlingar, se nedan. Opponent vid seminariet är Rolf Erik Olsen, NTNU (Norges teknisk-naturvitenskapelige universitet) och examinator Staffan Andersson, institutionen för biologi och miljövetenskap. Nicklas huvudhandledare är Lisa Jönsson Bergman (BioEnv) med Erik Sandblom (BioEnv/AstraZeneca) och Henrik Sundh (BioEnv) som bihandledare.
Kort sammanfattning (på engelska)
Vaccination of farmed fish causes side-effects ranging from mild tissue pigmentation to severe internal lesions that jeopardize fish welfare and sales. In addition, vaccination can impair growth and reduce yield, which has previously been attributed mainly to a loss of appetite. However, the loss of appetite after fish vaccination appears to be temporary. This suggests that long-term growth impairments, such that compromise yield, are mediated through other physiological mechanisms. The aim of my research is to describe the physiological mediators of impaired growth in vaccinated rainbow trout. The fundamental hypotheses tested are that (i). The immunological energetic cost imposed by vaccination leaves less energy to invest into growth; and (ii). The immunological up-regulation after vaccination is traded off with growth through the endocrine growth axis.