A comparative analysis of the diets of Varanus albigularis and Varanus niloticus in South Africa

作者: Kim Dalhuijsen , William R. Branch , Graham J. Alexander

DOI: 10.3377/004.049.0105

关键词: VaranidaeVaranus niloticusGeneralist and specialist speciesTrophic levelForagingEcologyBiologyWater monitorPredationVaranus albigularis

摘要: We present data from gut content analyses of Varanus albigularis (savanna monitor) and V. niloticus (water in South Africa. Both species are generalist, opportunistic feeders. did not detect any sex-based differences the diet albigularis, there were relatively high levels dietary overlap between species, although significant for certain prey types. These match habitat use species: more aquatic consumed prey, such as amphibians crabs, often than albigularis. included terrestrial diplopods its diet. Tortoises millipedes also prominent diet, constituting an important component intake. Few our samples had empty stomachs, suggesting that this may occupy a lower trophic level Australian counterparts. Although is large degree diets two trend to eat slow-moving prey. result foraging at different levels.

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