Ábrahám Levente (szerk.): Válogatott tanulmányok VI. - Natura Somogyiensis 19. (Kaposvár, 2010)

KOVÁCS GY., WINKLER D. & FARAGÓ S.: A kárókatona fészekalj és tojásméret vizsgálata a Kis-Balatonon és a Nagyberekben

266 NATURA SOMOGYIENSIS Results and Discussion Observed species A total of 58 waterbird species were recorded during the study period. Based on the constancy results, 11 of them were common species (C>50%), 32 accessory (0=5010%) and 15 rare (C<10%) species (Table 1.). Table 1: Observed bird species on the Marcali reservoir (2007-2008) (Av - average number of individuals per observation, N - total number of individuals, Do - dominance, De - density, C - constancy; Status: B - breeding species, C - common species, A - accessory species, R - rare species) Species Av N Do De (ind./ha) c Status Tachybaptus ruflcollis 2.2 42 0.2% 0.0 47% B, A Podiceps cristatus 5.1 96 0.5% 0.0 74% B, C Podiceps nigricollis 0.1 1 0.0% 0.0 5% R Phalacrocorax carbo 170.1 3232 18.0% 0.4 95% C Phalacrocorax pygmeus 3.7 71 0.4% 0.0 32% A Nycticorax nycticorax 6.2 117 0.6% 0.0 26% B. C Egretta alba 36.7 697 3.9% 0.1 100% C Egretta garzetta 0.3 5 0.0% 0.0 16% A Ardea cinerea 48.4 920 5.1% 0.1 100% C Ardea purpurea 1.5 28 0.2% 0.0 37% A Ixobriychus minutus 0.1 2 0.0% 0.0 11% B, A Botaurus stellaris 0.7 13 0.1% 0.0 37% B, A Platalea leucorodia 0.5 10 0.1% 0.0 21% A Cygnus olor 8.6 163 0.9% 0.0 100% B, C Anser fabalis 11.7 223 1.2% 0.0 11% A Anser anser 46.4 882 4.9% 0.1 68% B, C Branta leucopsis 0.2 4 0.0% 0.0 5% R Branta ruflcollis 0.1 1 0.0% 0.0 5% R Anser albifrons 193.1 3668 20.4% 0.5 32% A Tadorna tadorna 0.2 3 0.0% 0.0 5% R Anas penelope 0.3 5 0.0% 0.0 11% A Anas strepera 1.6 31 0.2% 0.0 16% A Anas crecca 32.9 626 3.5% 0.1 42% A Anas platyrhynchos 121.8 2314 12.9% 0.3 100% B, C Anas acuta 0.2 3 0.0% 0.0 11% A Anas querquedula 2.5 47 0.3% 0.0 16% A Anas clypeata 2.5 48 0.3% 0.0 21% A Aythya ferina 2.2 42 0.2% 0.0 42% B, A Aythya nyroca 8.1 154 0.9% 0.0 47% B, A Aythya fuligula 0.3 5 0.0% 0.0 11% A Aythya marila 0.1 2 0.0% 0.0 11% A Bucephala clangula 0.2 4 0.0% 0.0 5% R Gallinula chloropus 0.5 9 0.0% 0.0 32% B, A Fulica atra 33 627 3.5% 0.1 63% B, A Rallus aquaticus 0.2 4 0.0% 0.0 5% B, R Porzana porzana 0.1 2 0.0% 0.0 5% B. R Recurviristra avosetta 0.1 1 0.0% 0.0 5% R