Feeding habits of otters living on three moors in the Pannonian ecoregion (Hungary)

作者: József Lanszki , Gabriella Lanszkiné Széles

DOI:

关键词: Biomass (ecology)PredationBiologyLutraEcoregionZoologyHabitatCarassiusSpraintWaterfowlEcology

摘要: a b s t r c . Diet composition and feeding habits of eurasian otters ( Lutra lutra) living on three moors (Balata, nagyberek Feherviz) in Hungary were studied over two years using spraint analysis (n = 199, 503 315 samples from the moors, respectively). The food presence first moderate second drought year, when dried during summer period, generally differed. area-dependent variations diet also found. primary source was fish (biomass estimation for year: Balata 94.4% 99.9%; 93.9% 71.5%; Feherviz 66.4% 82.1%). Most (mean: 94.6–99.9%) small-sized (below 100 g weight), most frequently taken species Carassius spp. On which are dependent rainfall ground-water only, or after periods temporarily changed their optimal prey (fish) to sub-optimal (e.g., waterfowl) they often left habitat entirely. with small canals, kept as dominant source, weathered out extreme environmental local conditions.

参考文章(17)
József Lanszki, Diet composition of red fox during rearing in a moor: a case study Folia Zoologica. ,vol. 54, pp. 213- 216 ,(2005)
M. Delibes, Pablo Ferreras, M Carmen Blazquez, Why the Eurasian Otter (Lutra lutra) leaves a pond? An observational test of some predictions on prey depletion Revue d'écologie. ,vol. 55, pp. 57- 65 ,(2000)
József Lanszki, Otter monitoring between 2000 and 2004 in the Drava region (Hungary) Somogy Megyei Múzeumok Igazgatósága. ,(2005)
C. F. Mason, S. M. Macdonald, Otters: Ecology and Conservation ,(1986)
M. H. Wise, I. J. Linn, C. R. Kennedy, A comparison of the feeding biology of Mink Mustela vison and otter Lutra lutra Journal of Zoology. ,vol. 195, pp. 181- 213 ,(2009) , 10.1111/J.1469-7998.1981.TB03458.X
R. Burton, Paul Chanin, The natural history of otters Journal of Applied Ecology. ,vol. 23, pp. 1061- ,(1986) , 10.2307/2403958
Bogumiła Je˛drzejewska, Vadim E. Sidorovich, Mikhail M. Pikulik, Włodzimierz Je˛drzejewski, Feeding habits of the otter and the American mink in Białowieża Primeval Forest (Poland) compared to other Eurasian populations Ecography. ,vol. 24, pp. 165- 180 ,(2001) , 10.1034/J.1600-0587.2001.240207.X
H. Kruuk, J.W.H. Conroy, U. Glimmerveen, E.J. Ouwerkerk, The use of spraints to survey populations of otters Lutra lutra Biological Conservation. ,vol. 35, pp. 187- 194 ,(1986) , 10.1016/0006-3207(86)90050-9
Jordi Ruiz-Olmo, Josep Maria Olmo-Vidal, Sisco Mañas, Antoni Batet, The influence of resource seasonality on the breeding patterns of the Eurasian otter (Lutra lutra) in Mediterranean habitats Canadian Journal of Zoology. ,vol. 80, pp. 2178- 2189 ,(2002) , 10.1139/Z02-186