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Diet composition of the invasive cane toad (Chaunus marinus) on Rota, Northern Mariana Islands

Pacific Conservation Biology

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Abstract

The cane or marine toad (Chaunus marinus, formerly Bufo marinus) was introduced to the Northern Mariana Islands starting in the 1930s. The effects of this exotic predator on native vertebrates (especially lizards) are largely unknown. We analysed the stomach contents of 336 cane toads collected from the island of Rota, with the goal of estimating the level of toad predation on native vertebrates. Beetles, ants, millipedes, and grasshoppers/crickets comprised the majority of prey classes consumed by toads. The introduced Brahminy blindsnake (Ramphotyphlops braminus; N = 6) and conspecific cane toads (N = 4) were the vertebrates most commonly found in toad stomachs. Skinks (Emoia; N = 2) were the only native vertebrates represented in our sample. The small numbers of nocturnal terrestrial vertebrates native to Rota likely translates to relatively low rates of predation by cane toads on native vertebrates.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Diet composition of the invasive cane toad (Chaunus marinus) on Rota, Northern Mariana Islands
Series title:
Pacific Conservation Biology
Volume
13
Issue:
3
Year Published:
2007
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
219
Last page:
222
Number of Pages:
4