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001-es BibID:	BIBFORM055341
Első szerző:	Juhász Krisztina (biológus-ökológus)
Cím:	Main versus alternative prey of Eurasian otters in an East-European artificial wetland system / Juhász Krisztina, Végvári Zsolt, Perpék Mónika, Lukács Balázs András, Nagy Sándor Alex
Dátum:	2014
ISSN:	1584-9074
Megjegyzések:	The dietary composition of the Eurasian otter (Lutra lutra) inhabiting an artificial wetland system,used for aquaculture, was studied over a two-year period in north-eastern Hungary using spraint analyses.Samples were collected on monthly basis along a standard line transect. The main component of the diet wasfish, followed by amphibians, birds, insects, mammals, molluscs and reptiles. Except for mammals, we didnot find any significant seasonal variation in the composition of prey. Birds were mostly preferred in the firstperiod of the study years, while mammals were dominant in the second one. Most insects were preyed uponin spring, similar to the case of amphibians. Otters did not show any seasonal variation in their trophic niche,most likely due to stable food resource, and the niche breadth was similar between wetland units. Thepreference for various fish species varied significantly by weight category between fishponds. However,independent of weight and pond categories, pike (Esox lucius) was consistently preferred, similar to carpspecies (Carassius sp.) of smaller body mass. Further, we investigated the ratio of economically important fishspecies against hibernating species by analysing spraints from winter months. We found that, the ratio ofeconomically important species was high; suggesting an optimisation of subsidies for fish-farming.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban diet composition fishpond hungary Lutra lutra spraint analysis
Megjelenés:	North-Western Journal of Zoology. - 10 : 1 (2014), p. 1-9 -
További szerzők:	Végvári Zsolt (1969-) (biológus) Perpék Mónika Lukács Balázs András (1979-) (ökológus) Nagy Sándor Alex (1956-) (hidrobiológus)
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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