Frequent consumption of sap suggests that omnivory is widespread among Australian geckos
- 1 April 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in The Science of Nature
- Vol. 108 (2), 1-6
- https://doi.org/10.1007/s00114-021-01720-6
Abstract
The diets of many animals are influenced by resource availability, competition, and evolutionary selected traits enabling the utilization of palatable foods. Omnivores are species that maintain their macronutrient balance by supplementing highly abundant but poor nutritional quality food items, with sporadically available but high nutritional quality food items. Although there are anecdotal observations of Australian geckos (Lacertilia: Gekkonidae) consuming plant exudates, the consumption of plant material has long been considered to be anomalous behavior among Australian geckos. Here, we test the idea that sap feeding may not be anomalous behavior but instead a dietary niche of geckos that has gone unappreciated due to constraints on the methods used to quantify geckos’ diets. We tested this idea by investigating the consumption of Acacia victoriae gum by the gecko Gehyra versicolor using timed searches and time-lapse photography. We found that geckos frequently consumed gum, and G. versicolor numbers were five times greater on A. victoriae trees that exhibited significant gum bleeds compared to gecko numbers on non-bleeding trees. Taken together, our observations that G. versicolor spp. frequently feed on gum along with anecdotal reports of geckos consuming gum provide compelling evidence that gum/sap feeding is not anomalous behavior and suggest that many Australian gecko species are omnivores whose diets include plant exudates and animal prey.Keywords
Funding Information
- Australian Research Council (DP180101477)
This publication has 26 references indexed in Scilit:
- Distribution, extent, and evolution of plant consumption by lizardsJournal of Zoology, 2002
- Geckos are milking honeydew-producing planthoppers in MadagascarJournal of Natural History, 2001
- Correspondence Between Diet and Food Chemical Discriminations by Omnivorous Geckos (Rhacodactylus)Journal of Chemical Ecology, 2000
- Dynamic Anti-Herbivore Defense in Ant-Plants: The Role of Induced ResponsesOikos, 1998
- Patterns of plant visitation by nectar-feeding lizardsOecologia, 1995
- Aspects of the dynamics of the seed-banks and seedling populations of Acacia victoriae and Cassia spp. in arid western New South WalesAustral Ecology, 1987
- The amino acid composition of the proteinaceous component of gum arabic(Acacia Senegal(L.) Willd.)∗Food Additives & Contaminants, 1985
- The composition of eight Acacia gum exudates from the series Gummiferae and VulgaresPhytochemistry, 1979
- The Population Ecology of the Gekkonid Lizard (Gehyra variegata (Dumeril & Bibron)) in Exploited Forests in Northern New South WalesJournal of Animal Ecology, 1969
- Activity Cycle and Thermoregulation in the Australian Gecko Gehyra variegataIchthyology & Herpetology, 1967