Table 2. Relative abundance (in %) of the prey items identified in the native and colonized ranges of Xenopus laevis.
When prey items are observed in very low quantities (N < 3), they are noted as <0.01% in the table. The main prey categories of each populations are underlined. Below the name of each ecological category, we mention the mean and the standard deviation of the relative abundance of items found in stomach contents.
| Cat no | South Africa | Wales | France | Chile | Portugal | USA | ||
|---|---|---|---|---|---|---|---|---|
| Aquatic invertebrates | 65.99 | 99.15 | 80.68 | 98.54 | 96.56 | 98.13 | ||
| 1 | Zooplankton | 51.87 | 92.55 | 39.62 | 82.51 | 2.28 | 68.89 | |
| Benthos | 8.86 | 6.45 | 37.08 | 14.85 | 93.90 | 27.41 | ||
| 34.80% ± 34.17% | ||||||||
| 2 | Annelida | 0.03 | 0.00 | 0.02 | 0.00 | 0.05 | 0.00 | |
| 3 | Turbellaria | 0.00 | <0.01 | 0.00 | 0.00 | 0.00 | 0.00 | |
| 4 | Gastropoda | 0.00 | 0.00 | 9.82 | 10.64 | 15.05 | 7.99 | |
| 5 | Bivalvia | 0.00 | 0.24 | 0.44 | 0.00 | 0.05 | 0.00 | |
| 6 | Acari | 4.63 | 0.00 | 0.00 | 0.00 | 0.05 | 0.00 | |
| 8 | Amphipoda | 1.83 | 0.02 | 3.09 | 0.00 | 0.05 | 4.21 | |
| 9 | Isopoda | 0.00 | 0.00 | 0.00 | 0.00 | 2.62 | 0.05 | |
| 10 | Decapoda | 0.00 | 0.00 | 0.00 | 0.00 | 0.06 | 0.00 | |
| 11 | Diptera (larvae) | 1.78 | 6.14 | 20.90 | 4.21 | 15.24 | 9.91 | |
| 12 | Ephemeroptera (larvae) | 0.00 | 0.05 | 2.79 | 0.00 | 58.02 | 0.98 | |
| 13 | Trichoptera (larvae) | 0.59 | 0.00 | 0.02 | 0.00 | 2.71 | 4.27 | |
| Nekton | 5.26 | 0.14 | 4.00 | 1.19 | 0.50 | 1.83 | ||
| 7.74% ± 13.87% | ||||||||
| 14 | Coleoptera (larvae) | 1.97 | 0.03 | 0.02 | 0.00 | 0.06 | 0.27 | |
| 15 | Coleoptera (adult) | 0.67 | 0.09 | 1.74 | 0.44 | 0.38 | 0.34 | |
| 16 | Heteroptera | 1.09 | 0.02 | 1.12 | 0.18 | 0.01 | 0.16 | |
| 17 | Zygoptera (larvae) | 0.79 | 0.00 | 0.38 | 0.44 | 0.00 | 0.53 | |
| 18 | Anisoptera (larvae) | 0.74 | 0.00 | 0.74 | 0.13 | 0.05 | 0.53 | |
| Terrestrial invertebrates | 0.86 | 0.43 | 0.23 | 1.46 | 0.70 | 0.24 | ||
| 0.64% ± 0.46% | ||||||||
| 19 | Arachnida | 0.46 | 0.01 | 0.00 | 1.21 | 0.05 | 0.11 | |
| 20 | Isopoda | 0.00 | 0.05 | 0.00 | 0.03 | 0.04 | 0.00 | |
| 21 | Chilopoda | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.00 | |
| 22 | Diplopoda | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.00 | |
| 23 | Diptera | 0.09 | 0.06 | 0.00 | 0.00 | 0.04 | 0.08 | |
| 24 | Neuroptera | 0.04 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | |
| 25 | Hymenoptera | 0.27 | 0.00 | 0.00 | 0.05 | 0.16 | 0.00 | |
| 26 | Coleoptera | 0.00 | 0.01 | 0.05 | 0.00 | 0.00 | 0.05 | |
| 27 | Lepidoptera (larvae) | 0.00 | <0.01 | 0.00 | 0.00 | 0.00 | 0.00 | |
| 28 | Lepidoptera (adult) | 0.00 | 0.00 | 0.00 | 0.15 | 0.00 | 0.00 | |
| 29 | Dermaptera | 0.00 | 0.01 | 0.00 | 0.03 | 0.00 | 0.00 | |
| 30 | Heteroptera | 0.00 | 0.00 | 0.02 | 0.00 | 0.10 | 0.00 | |
| 31 | Annelida | 0.00 | 0.02 | 0.09 | 0.00 | 0.02 | 0.00 | |
| 32 | Orthoptera | 0.00 | 0.00 | 0.08 | 0.00 | 0.00 | 0.00 | |
| 33 | Aphids | 0.00 | 0.27 | 0.00 | 0.00 | 0.00 | 0.00 | |
| 34 | Trichoptera | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | 0.00 | |
| 35 | Ephemeroptera | 0.00 | 0.00 | 0.00 | 0.00 | 0.24 | 0.00 | |
| Vertebrates | 33.13 | 0.41 | 19.09 | 0.00 | 2.74 | 1.63 | ||
| 9.45% ± 13.54% | ||||||||
| 36 | Fish (adult) | 0.00 | 0.00 | 0.11 | 0.00 | 0.02 | 0.08 | |
| 37 | Fish (egg) | 0.00 | 0.00 | 0.00 | 0.00 | 0.82 | 0.00 | |
| 38 | Amphibia (adult) | 0.14 | 0.00 | 0.02 | 0.00 | 0.00 | 0.00 | |
| 3 | Amphibia (larvae) | 3.37 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | |
| 39 | Amphibia (egg) | 27.62 | 0.00 | 0.08 | 0.00 | 1.65 | 0.00 | |
| 40 | X. laevis (larvae) | 0.04 | 0.00 | 0.08 | 0.00 | 0.01 | 0.03 | |
| 41 | X. laevis (egg) | 0.00 | 0.41 | 18.81 | 0.00 | 0.00 | 1.52 | |
| 42 | Amphibia (rest) | 1.98 | 0.01 | 0.00 | 0.00 | 0.22 | 0.00 | |
| 43 | Bird (feather) | 0.00 | <0.01 | 0.00 | 0.00 | <0.01 | 0.00 | |
| 44 | Mammals | 0.00 | <0.01 | 0.00 | 0.00 | 0.00 | 0.00 |