Part 1. Initial information, review of relevant literature Chapter 1.1. Main terms
Chapter 1.2. Ecology, distribution and number of European freshwater pearl mussels
Chapter 1.3. Factors of negative influence upon the populations of Margaritifera margaritifera Europe
Chapter 1.4. Studied area and data on Margaritifera margaritifera
Part 2. Material and methods
Chapter 2.1. Revealing the fact of availability or absence of Margaritifera margaritifera populations in the rivers, characteristics of their condition
Chapter 2.2. Estimation of the tendencies of current change of condition of the Margaritifera margaritifera populations and the study of results of restoration activities
Chapter 2.3. Study of negative influences upon Margaritifera margaritifera populations
Chapter 2.4. Elaboration of conservation measures for the populations of Margaritifera margaritifera
Chapter 2.5. Formation of model for conservation research
Chapter 2.6. Study of the variety of Margaritifera margaritifera shells
Chapter 2.7. Evaluation of ageing of Margaritifera margaritifera
Part 3. Results
Chapter 3.1. Distribution and number of Margaritifera margaritifera of the studied area. Extinct populations
Chapter 3.2. Tendencies of current change of the Margaritifera margaritifera populations. Results on the works on their conservation and restoration
Chapter 3.3. Factors of negative influence on Margaritifera margaritifera populations of studied area
Chapter 3.4. Measures concerning the conservation of Margaritifera margaritifera populations
Chapter 3.5. Elaboration of model of conservation study Chapter 3.6. Data on variability of shell form giving occasion to describe three species of the freshwater European pearl mussels
Chapter 3.7. Age and ageing of pearl mussels
Part 4. Discussion
Chapter 4.1. Distribution of Margaritifera margaritifera
Chapter 4.2. Rare phenomena: survival of small populations of Margaritifera margaritifera, "ideal habitat", survival of Margaritifera margaritifera in condition of high anthropogenic pressure
Chapter 4.3. Common and "uncommon" pearl mussels
Chapter 4.4. Absence of non-aging animals
Chapter 4.5. Extinction of Margaritifera margaritifera in context of global change of biosphere
Chapter 4.6. Extinction of Margaritifera margaritifera as an evolutionary process
Chapter 4.7. Application of the principles of present study to the other objects, concept of zoological study of a territory
