Evaluation of the role of the great cormorant (Phalacrocorax Carbo) in the formation of aquatic bioresources of the Dnieper-Bug estuary hydroecosystem
Journal Title: Водні біоресурси та аквакультура - Year 2017, Vol 2, Issue
Abstract
Based on the results of many years of research, an attempt is made to assess the impact of the great cormorant (Phalacrocorax carbo) on the hydrobiocenosis of the Dnieper-Bug estuary, where its population has increased up to 7.4 thousand birds. The average daily quantity of food consumed by cormorant, considering seasonal, age and sexual characteristics, is 0.65 kg. Three low-value food organisms – small gobies, sprat and atherine – are dominant (87.6%) in the feeding diet. The amount of ichthyomass consumed by cormorant in the area of the Dnieper-Bug estuary, which reaches 1.3 thousand tons per year, is twice less than the annual loss of aquatic bioresources due to mass death events.
Authors and Affiliations
Ю. В. Пилипенко, І. В. Наконечний, М. В. Козичар
Keywords
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