The house crow (Corvus splendens): a threat to New Zealand?

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Authors
Fraser, Diane
Aguilar, Glenn
Nagle, William
Galbraith, Mel
Ryall, Colin
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Grantor
Date
2015-05-04
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Other
Ngā Upoko Tukutuku (Māori subject headings)
Keyword
New Zealand
house crow
Corvus splendens (house crow)
modelling
spatial distribution
ANZSRC Field of Research Code (2020)
Citation
Fraser, D. L., Aguilar, G., Nagle, W., Galbraith, M., & Ryall, C. (2015). The house crow (Corvus splendens): a threat to New Zealand?. ISPRS International Journal of Geo-Information, 4(2), pp.725-740. doi:10.3390/ijgi4020725
Abstract
The house crow (Corvus splendens), a native of the Indian subcontinent, has shown a rapid expansion of habitat range across Eastern Africa, the Arabian Peninsula, Europe and Asia. It is an adaptable, gregarious commensal bird which is regarded globally as an important pest species due to its impacts on livestock, agricultural and horticultural crops and indigenous fauna and as a fecal contaminator of human environments and water resources. Two Maxent (v3.3.3k) models (A) with presence data in Australia and (B) with simulated entry data locations in New Zealand) and a third ArcGIS model (C) with environmental and social layers) are used to determine an overall suitability index and establish a niche-based model of the potential spatial distribution for C. splendens within New Zealand. The results show that New Zealand, particularly the northern regions of North Island, has suitable environments for the establishment of the house crow. In order of suitability Model B showed highest potential land area suitability (31.84%) followed by Model A (13.79%) and Model C (10.89%). The potential for further expansion of this bird’s invasive range is high and, if New Zealand is invaded, impacts are likely to be significant.
Publisher
Link to ePress publication
DOI
10.3390/ijgi4020725
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CC0 1.0 Universal