eastern Baltic cod are in unexpectedly poor nutritional condition and the large
fish have disappeared. Besides deteriorating oxygen conditions and reduced
amounts of prey for cod, infection with the parasitic cods liver worm (Contracaecum osculatum) suggestively cause this distress. As
the name indicate, this parasite sit in the liver of the fish, and because the
liver plays a crucial role in many vital processes, such as growth,
reproduction and energy storage, heavy infections may affect the health status
of the fish.
will use histology
to investigate how the parasitic liver worm damage liver tissue, i.e. examine
changes in structures and cells of the cod liver in relation to different
infection intensities. In addition, specific infection sites inside the liver
parenchyma will be identified. Together,
this information can be used to evaluate how liver worm may affect the function
of the liver.