Frequency distributions of fish parasites in the perch Perca fluviatilis L. from Lake Constance

1997 ◽  
Vol 83 (4) ◽  
pp. 370-373 ◽  
Author(s):  
Thomas E. Balling ◽  
W. Pfeiffer
Keyword(s):  
Perca Fluviatilis ◽  
Fish Parasites ◽  
Lake Constance ◽  
Frequency Distributions ◽  
Perch Perca Fluviatilis

scholarly journals Monitoring sanitary state of perch (Perca fluviatilis L.) in open and closed water bodies of Volga basin

2020 ◽  
Vol 2020 (2) ◽  
pp. 36-44
Author(s):  
Elizaveta Aleksandrovna Stepanenko ◽  
Nuria Abdrakhimovna Kanieva ◽  
Tatiana Nikolaevna Grigoryeva
Keyword(s):  
Raw Materials ◽  
Perca Fluviatilis ◽  
Open Water ◽  
Water Bodies ◽  
Fish Parasites ◽  
Average Weight ◽  
Main Task ◽  
Perch Perca Fluviatilis ◽  
Astrakhan Oblast ◽  
Closed Water

The article describes the main task of the sanitary-parasitological inspection as a timely detection of parasites and the degree of infection of fish raw materials in order to determine the eating properties or other use of fish products. Sanitary and parasitological study of the fish from the closed and open water bodies of the Astrakhan Oblast was carried out using perch (Perca fluviatilis L.) as an example. There were studied 60 fish specimens (by 10 specimens in the autumn, winter, spring periods of 2018-2019) caught from the Sarbai River and the Shuralinskoye reservoir, with average weight of 110-182 g and length of 15-25 cm. There have been found dangerous nematodes (Anisakidae) and nematodes (Eustrongylides) – parasites that are not dangerous to human health, but significantly spoil the fish marketability. According to the results of comparative analysis of the extensiveness and permissible average number of parasites per 1 kg of fish, depending on the season and the type of reservoir, it was inferred that the Shuralinskoye reservoir is a safer reservoir in terms of the prevalence of helminthes in perch than the Sarbai River. The fish from the reservoir can be eaten after sculling, gutting and the appropriate decontamination methods. The dynamics of fish parasites occurrence has been found to depend on the type of the water body and the season.

Percids of Lake Constance, a Lake Undergoing Eutrophication

1977 ◽  
Vol 34 (10) ◽  
pp. 1670-1677 ◽  
Author(s):  
J. Hartmann ◽  
W. Nümann
Keyword(s):  
Growth Yield ◽  
Perca Fluviatilis ◽  
Lake Constance ◽  
Review Of Literature ◽  
Limited Data ◽  
Age Composition ◽  
Perch Perca Fluviatilis ◽  
The Status ◽  
Stizostedion Lucioperca ◽  
Growth Distribution

A review of literature suggested that yield of Eurasian perch, Perca fluviatilis, in Lake Constance was greatest with moderate eutrophication. During eutrophication (1950–76), changes also took place in food, growth, distribution, and diseases of perch. Differences in perch between Lake Constance and other German or Alpine lakes of various degrees of eutrophy were found with respect to growth, yield, the relation of growth to yield, food, and the relation of food to growth. Similarities were apparent for perch in these lakes in terms of their age composition, age at maturity, and mortality. Only limited data were available for pikeperch, Stizostedion lucioperca, mainly on stocking success, yield, and growth. The status of percids in Lake Constance indicates that eutrophication has led to conditions favoring percids. Key words: Percidae, Lake Constance limnology, eutrophication, yield, Perca fluviatilis, food, growth, distribution, disease, Stizostedion lucioperca

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