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Hydrobiologia

, Volume 279, Issue 1, pp 63–69 | Cite as

Abundance and feeding of wintering and migrating aquatic birds in two sampling areas of Lake Balaton in 1983–1985

  • J. E. Ponyi
Article

Abstract

The investigation was carried out at two sampling areas in Lake Balaton (surface area 600 km2), of which one was hypertrophic and the other was mesotrophic. Species diversity was higher in the hypertrophic area, primarily due to a higher number of Anatid species. Contents of crops, gizzards, and intestines were analysed in 321 of the 361 birds collected. Diet was similar in certain species (Aythya fuligula, A. f. ferina, Anas querquedula) despite differences in the trophic state of their habitats. However, in other species (Anas p. platyrhyncha, Aythya nyroca, Bucephala c. clangula), percentage distribution of food items more or less reflected the food resources of the two areas in the digestive tracts. I concluded that the former species are highly selective in their feeding.

Key words

digestive tract analysis food shallow lake Anas Aythya Bucephala 

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References

  1. Biró, P. & P. Garádi, 1974. Investigations on the growth and population-structure of bream (Abramis brema L.) at different areas of Lake Balaton, the assessment of mortality and production. Annal. Biol. Tihany 41: 153–175.Google Scholar
  2. Herodek, S., 1988. Eutrophication of the Lake Balaton. In K. Misley (ed.), Lake Balaton research and management. ILEC, 31–58.Google Scholar
  3. Keve, A., 1981. Changes of the avifauna of Lake Balaton and its catchment area during the last five years (1974–1980). VEAB Monografia 16: 299–304. (Hung. Engl., summ.).Google Scholar
  4. Marian, M., 1978. Methods for the quantitative measurements of birds stocks. Puszta 7: 3–4 (Hung.).Google Scholar
  5. Misley. K. (ed.), 1988. Lake Balaton research and management. ILEC, 111 pp.Google Scholar
  6. Ponyi, J. E., 1975. The biomass of zooplankton in Lake Balaton. Symp. Biol. Hung. 15: 215–224.Google Scholar
  7. Ponyi, J. E., 1981. Quantitative study of macrobenthos in Lake Balaton. VEAB Monografia 16: 221–237 (Hung., Engl. summ.).Google Scholar
  8. Ponyi, J. E., 1992. The distribution and biomass of Unionidae (Mollusca, Bivalvia), and the production of Unio tumidus Retzius in Lake Balaton (Hungary). Arch. Hydrobiol. 125: 245–251.Google Scholar
  9. Ponyi, J. E. & N. P. Zánkai, 1987. Feeding conditions of 1 + − 2 + summer breams (Abramis brama) and 2 + − 3 + summer carps (Cyprinus carpio) in a sample region of Lake Balaton. XXIX. Georgikon Napok, Keszthely 80–87 (Hung., Engl. summ.).Google Scholar
  10. Ponyi, E. J. & A. I. A. Zarok, 1984. Feeding condition of the fry of bream in Lake Balaton. Halászat XXX. (77): 119–121 (Hung.).Google Scholar
  11. Ponyi, J. E., I. Tátrai & A. Frankó, 1983. Quantitative studies on Chironomidae and Oligochaeta in the benthos of Lake Balaton. Arch. Hydrobiol. 97: 196–207.Google Scholar
  12. Sasvári, L., 1986. Bird Ecology, I–II. Akadémiai Kiadó, Budapest 1–167, 1–162 (Hung.).Google Scholar
  13. Székessy, V., 1958. Aves — Madarak. Fauna Hungariae, 21., Akadémiai Kiadó, Budapest (Hung.).Google Scholar
  14. Tátrai, I. L. G.-Tóth & J. E. Ponyi, 1985. Effects of bream (Abramis brama L.) on the lower trophic level and on the water quality in Lake Balaton. Arch. Hydrobiol. 105: 205–217.Google Scholar
  15. Tátrai, I., L. G.-Tóth, J. E. Ponyi, J. Zlinszky & V. Istvánovies, 1990. Bottom-up effects of bream (Abramis brama L.) in Lake Balaton. Hydrobiologia 200/201 (Dev. Hydrobiol. 61): 167–175.Google Scholar
  16. Virág, A'., 1988. Engineering and pollution control on Lake Balaton. In K. Misley (ed.), Lake Balaton Research and management. ILEC: 59–88.Google Scholar
  17. Zánkai, N. P. & J. E. Ponyi, 1973. The biomass of Rotatoria in Lake Balaton. Annal. Biol. Tihany 40: 285–292.Google Scholar

Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • J. E. Ponyi
    • 1
  1. 1.Balaton Limnological Research Institute of the Hungarian Academy of SciencesTihanyHungary

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