[Fish diseases in Switzerland. A statistical evaluation of the diagnostic materials of the fish research laboratory from 1979-1988. I. General aspects].
The entire diagnostic material of the Fish Disease Laboratory at the University of Berne from 1979 to 1988, a total of more than 3800 cases, is presented. Not included is material of import controls and material from experimental work. The following criteria were evaluated: fish species, origin and length of fish, season, infectious and noninfectious diseases. Furthermore, the results were investigated for changes of the composition of fish species and number of diseases within the ten-year period and for a seasonal influence on the outbreak of diseases. More than 40% of all fish investigated were rainbow trout, followed by brown trout, omamental fish and cyprinids. Over 40% of fish originated from private fishfarms whereas 20% were of governmental origin (governmental fishfarms, rivers, lakes) and 20% from aquaria. Parasites were present in more than 40% of all cases. Bacterial infections were diagnosed in nearly 30%, viral infections in 6% and fungal diseases in 5% of all cases. 20% of all cases concerning noninfectious diseases were caused by unfavourable environmental conditions whereas the incidence of diseases related to nutrition was less than 10%. The occurrence of the different diseases was waxing and waning over the period of ten years but no definite tendencies could be emphasized. However, most of the diseases investigated demonstrated a significant seasonal influence.
Meier
W
W
Untersuchungsstelle für Fischkrankheiten, Universität Bern.
Wahli
T
T
Schmitt
M
M
D000818:Animals; D003530:Cyprinidae; D005393:Fish Diseases / Q000453:epidemiology*; D005399:Fishes; D012621:Seasons; D013557:Switzerland / Q000453:epidemiology; D014337:Trout
Fischkrankheiten in der Schweiz. Eine statistische Auswertung des diagnostischen Materials der Fischuntersuchungsstelle (FUS) von 1979-1988. I. Allgemiene Aspekte.