Spectral analysis of exploited fish populations in Lake Koronia (Macedonia, Greece) during the years 1947-1983

Economidis P.S., Sinis A.I., Stamou G.P.

Date de parution: avril 1988
Volume: 12
Number: 2
Pagination: 151-159
Editeur: Société Française d'Ichtyologie
doi: https://doi.org/10.26028/cybium/1988-122-008
Résumé

The exploited populations of the four dominant species of fish in Lake Koronia, as well as the total production, have been studied by spectral analysis. The species Cyprinus carpio and Perca fluviatilis display regular fluctuations with a periodicity of about 3-4 years, while Rutilus rutilus and Alburnus alburnus show random fluctuations due to fishing practices. The in-phase correlation between C. carpio and P. fluviatilis was positive with a periodicity of about 3-4 years. In contrast, no in-phase correlation was observed between P. fluviatilis and R. rutilus, due to the balance between mutual predation and competition phenomena. The decrease of the total fishing production is influenced mainly by perturbation of the water balance of the lake as well as overexploitation.

Mots-clés: Alburnus alburnus - Cyprinus carpio - Greece - Perca fluviatilis - Population dynamics - Rutilus rutilus - Spectral analysis
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