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Biomedical subjects

T Wahli

Publications and source records attributed to T Wahli.

5 recordsLinked to original sources
PubMed1992

[Fish diseases in Switzerland. A statistical evaluation of the diagnostic material of the Fish Research Institute from 1979-1988. II. Special aspects].

The frequency of fish diseases diagnosed at the Fish Disease Laboratory at the University of Berne from 1979 to 1988 is presented. Parasitic infections have been found to be the most frequent diagnosis. Among noninfectious diseases poisonings were predominant. Six infectious diseases have been considered to be economically relevant. These diseases (according to their frequency: Gyrodactylosis, Costiosis, Ichthyophthiriosis, Viral Hemorrhagic Septicemia (VHS), Saprolegniosis and Furunculosis) were further analysed. Their incidence varies with season, species, origin and length of fish. Possible explanations for these findings are discussed.

Animals↗
PubMed1991

[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.

Animals↗
PubMed1991

[Fish and their significance from the international and Swiss viewpoints].

In landlocked countries, the role of fish is often poorly known and/or propagated. In many countries fish represent the biggest and qualitatively most valuable protein source (24% of the worldwide available animal protein) for human consumption. At present the economic significance of the production and trade of fish is already very high. However, according to FAO, the future demand of proteins can only be covered by a considerable expansion of the aquaculture production, in particular because of a stagnated fish catch and a continuous reduction of the agricultural production. The ideational value of ornamental fish appears obvious however pet fish keeping represents also a value worth of many millions US dollars worldwide. Finally the importance of fish will not only increase for economic, but certainly also for ecological reasons, because it is well established as an incorruptible bioindicator of our environment.

Agriculture↗