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What is Pontic Shad Catch Dynamics in Danube about?
The document presents a model of catch data for Pontic shad fish in the Danube River and Black Sea from 1920-2008. The catch data for Pontic shad showed natural cyclic fluctuations without signs of population decline, with oscillation periods of 11.17 and 9.56 years correlating with solar activity cycles. Catch data for anchovy fish in the Black Sea from 1950-2006 was also modeled, as anchovy is a main food source for Pontic shad. There was a 67.86% correlation between Pontic shad and anchovy catches over t
- Author
- daniel cretu
- Language
- EN