StatusThe thesis was presented on the 25 August, 2009
Approved by NCAA on the 5 November, 2009
Abstract– 0.89 Mb / in romanian
The aim of the work was to study population ecology of fish with short life spans and to analyze reproductive adaptations, which lead to their domination within ichthyocoenoses of the lower sector of the Dniester River under conditions of anthropogenic influence. The following objectives have been proposed: to study the status, structural modifications, and reproductive adaptations and to model life cycles strategies in populations of Alburnus alburnus (Linnaeus), Blicca bjoerkna (Linnaeus) and Leuciscus leuciscus (Linnaeus) from the lower sector of the Dniester River under conditions of environment modification by anthropogenic impact.
Methodology of scientific research is based on fundamental data, exposed in scientific works by Vasnetsov V. (1953), Monastyrskiy G. (1953), Pianka E. (1970, 1981), Nikoliskiy G. (1974), Shatunovskiy M. (1978, 1996, 2007), Roff D. (1983, 1992, 2006), Chepurnova L. (1991, 2002), Usatîi M. (2004), Toderaș I. (2008).
Scientific innovation. For the first time, the concept of life cycle strategies for fish species with short and conditionally short life spans has been elaborated and their reproductive adaptations at different structural levels caused by unstable environmental factors have been identified.
The theoretical significance of the work is related to the extension of concept regarding population structure and life cycles strategies in populations of bleak Alburnus alburnus (Linnaeus), white bream Blicca bjoerkna (Linnaeus) and dace Leuciscus leuciscus (Linnaeus) under conditions of anthropogenic pressing intensifications in the lower sector of the Dniester River.
The practical importance of the work is connected with the elaboration of practical recommendations regarding restoration of the ecological situation in the Dniester River basin in terms of sustainable functioning of ichthyocoenoses.
The obtained results are implemented in the didactic process at the Moldova State University, Faculty of Biology and Soil Sciences.