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

272 NATURA SOMOGYIENSIS 30 40 25 • 35 25 35 20 R

2 = 0.66 • •V* 30 20 • p< 0.001 • 25 • • • -O 15 20 R

2 = 0.62 10 • ' 15 p<0.01 10 • • 15 10 5 5 • 0 ! 0 • 100 200 300 Water level (cm) 400 100 200 300 Water level (cm) 400 Fig. 12: Relationship between water levels and species richness Fig. 13: Relationship between water levels and number of individuals of the diving duck species High number of shorebird individuals can be detected only at low water levels when the waterbody is lowered to enable intensive fishing, which in turn facilitates the formation of optimal feeding habitats. 20 * • R- = 0.49 p<0.01 400 350 300 •3 250 3 1 200 - 150 100 50 0 100 200 300 Water level (cm) 400 100 R = 0.87 p< 0.001 200 300 Water level (cm) —£ 400 Fig. 14: Relationship between water levels and number of Mute Swan individuals Fig. 15: Relationship between water levels and number of shorebird individuals