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In the temperate zone, climate warming improves the environmental conditions of warm water fish in many ways thus stimulating their growth and yield. Warming was observed in fishponds in the mid 1980s when seasonal sums of water temperature above 14°C, i.e. the temperature effective for carp, Cyprinus carpio growth, frequently exceeded the long-term average sum. There was considerable variability...
Black's formula was verified in the topoclimate of fish ponds situated at Cieszyn Silesia on the basis of decade values of the solar duration and of density of the radiation flux obtained in years 1980-1994. Results confirmed the linear character of regression equations, however regression coefficients obtained were lower than those computed by other authors for the daily values. The verified Black's...
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