2007takamura_01-01
DESCRIPTION
2007takamura_01-01TRANSCRIPT
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Oryzias latipes
2000
Gambusia affinis
1999
http://www.biodic.
go.jp/rdb/rdb_f.html2007713
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305-8506 16-2Environmental Biology Division, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japane-mail: [email protected] 7 262007 9 14
(Japanese Journal of Conservation Ecology) 12 : 112-117 (2007)
Prediction of habitat suitability for medaka Oryzias latipes based on presence data
Kenzi Takamura
Environmental Biology Division, National Institute for Environmental Studies
1960
GIS
Abstract: Habitat suitability for medaka, Oryzias latipes, was predicted based on presence data for southern Ibaraki Prefecture,
Japan, in the late 1960s. Land use on maps was used as an environmental variable for describing the niche of medaka. A
multivariate analysis showed that the distribution of rice fields delineated the niche most strongly in a positive way. The
distribution of urban areas was the second strongest variable, and also had a positive effect. Cropland, secondary grassland, and
pine forest were also used in the niche description. A cross-validation test indicated that the prediction was reliable, as there was
a significant correlation between the habitat suitability and the relative frequency of presence data among grids of each class
of habitat. Given that a large area of rice fields has been altered, to allow mechanical cultivation, in such a way that medaka
habitat has been destroyed, and the present distribution of medaka is limited and difficult to determine, the collection of such
geographical information is encouraged in order to construct a present habitat suitability map for medaka.
Key Words: Oryzias latipes, Habitat suitability, Habitat prediction, GIS, Presence data
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Geographical Information System: GIS
2002Iguchi et al. 2004
GIS
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ArcView 3.1Environmental Systems Research
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IdrisiClark Labs, Clark
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(1997) . 9:69-77 (2005) . ,
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