Table 1 Result of fecal analysis. FO, frequency of occurrence of items and NI, number of prey items.
From: Predation on endangered species by human-subsidized domestic cats on Tokunoshima Island
Items | FO (%) | NI | Contribution to DCB (%) | body weight (g) | IUCN Red List 2017 | Reference for body weight | ||||
|---|---|---|---|---|---|---|---|---|---|---|
TOTAL (n = 198) | feral (n = 174) | stray (n = 24) | TOTAL (n = 198) | feral (n = 174) | stray (n = 24) | |||||
Forest species | 17.7 | 20.1 | 0.0 | 40 | 40 | 0 | 15.5 | |||
Diplothrix legata | 6.1 | 6.9 | 0.0 | 12 | 12 | 0 | 7.7 | 483 | EN | |
Pentalagus furnessi | 4.0 | 4.6 | 0.0 | 8 | 8 | 0 | 6.7 | 2880* | EN | |
Tokudaia tokunoshimensis | 3.0 | 3.4 | 0.0 | 6 | 6 | 0 | 1.3 | 162.4 | EN | Yamada (unpublished) |
Erithacus komadori komadori | 0.5 | 0.6 | 0.0 | 1 | 1 | 0 | 0.0 | 22.4 | VU | |
Turdus pallidus | 0.5 | 0.6 | 0.0 | 1 | 1 | 0 | 0.1 | 78 | ||
Odorrana amamiensis | 0.5 | 0.6 | 0.0 | 1 | 1 | 0 | 0.1 | 60 | VU | |
Diestrammena gigas | 5.1 | 5.7 | 0.0 | 10 | 10 | 0 | 0.0 | 3 | ||
Thereuopoda clunifera | 0.5 | 0.6 | 0.0 | 1 | 1 | 0 | 0.0 | 3.5 | ||
Farmland species | 30.8 | 31.6 | 20.8 | 70 | 65 | 5 | 8.7 | |||
Rattus rattus | 24.2 | 26.4 | 20.8 | 53 | 48 | 5 | 6.9 | 98 | ** | |
Crocidura spp. | 6.6 | 7.5 | 0.0 | 15 | 15 | 0 | 0.1 | 7 | (C. orii) EN (C. watase) NT | |
Gallus gallus domesticus | 1.0 | 1.1 | 0.0 | 2 | 2 | 0 | 1.7 | 1500-* | ||
Unknown | — | — | — | |||||||
Horornis diphone | 1.0 | 1.1 | 0.0 | 2 | 2 | 0 | 0.0 | 15.8 | ||
Unidentified birds | 15.7 | 17.8 | 0.0 | 31 | 31 | 0 | — | — | — | |
Amphibians/Reptiles | 3.5 | 4.0 | 0.0 | 7 | 7 | 0 | — | — | — | |
Orthoptera | 8.6 | 6.3 | 25.0 | 17 | 11 | 6 | — | — | — | |
Mantodea | 1.0 | 1.1 | 0.0 | 2 | 2 | 0 | — | — | — | |
Coleoptera | 3.0 | 2.9 | 4.2 | 6 | 5 | 1 | — | — | — | |
Unidentified insects | 41.4 | 46.6 | 4.2 | 82 | 81 | 1 | — | — | — | |
Crustacea | 1.5 | 1.7 | 0.0 | 3 | 3 | 0 | — | — | — | |
Gastropods | 0.5 | 0.0 | 4.2 | 1 | 0 | 1 | — | — | — | |
Artificial objects | 23.7 | 24.1 | 20.8 | 47 | 42 | 5 | — | — | — | |
Plants | 42.4 | 32.2 | 50.0 | 84 | 72 | 12 | — | — | — | |
