@article{Vogrin_1999, place={Lund, Sweden}, title={Breeding birds of Race ponds in NE Slovenia and their trends during 13 years}, volume={9}, url={https://journals.lub.lu.se/os/article/view/22904}, DOI={10.34080/os.v9.22904}, abstractNote={<p>The breeding bird assemblage of the Rače fishpond complex in north-eastern Slovenia is described. There are three ponds (4.5 ha to 20 ha) which are managed for semi-intensive fish-farming. During 13 years (1986—1998), I estimated the number of breeding bird pairs on the bases of found nests and/or observed females with fledglings. Six species of non-Passeriformes, i.e. <em>Tachybaptus ruficollis</em>, <em>Podiceps cristatus</em>, <em>Anas platyrhynchos</em>, <em>Aythya fuligula</em>, <em>Fulica atra</em> and <em>Gallinula chloropus</em>, nested regularly. The total number of breeding pairs (excluding “possible“ breeders) varied between 12 in 1994 and 45 in 1998. During the period only two species declined, i.e. <em>Anas platyrhynchos</em> and <em>Aythya fuligula</em>. The numbers of two species pairs were positively correlated, i.e. <em>Podiceps cristatus</em> vs. <em>Tachybaptus ruficollis</em>, and <em>Fulica atra</em> vs. <em>Gallinula chloropus</em>. The densities among ponds were positively correlated in only one species pair, i.e. <em>Podiceps cristatus</em> and <em>Gallinula chloropus</em>. Although the total density was highest in the smallest pond, the difference among ponds was not significant.</p>}, number={3}, journal={Ornis Svecica}, author={Vogrin, Milan}, year={1999}, month={Jul.}, pages={127–132} }