Literaturdatenbank
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Ross, D. A., & Anderson, R. K. (1991). Habitat use, movements, and nesting of emydoidea blandingii in central wisconsin. Journal of Herpetology, 24(1), 6–12.
Added by: Admin (24 Aug 2008 17:39:59 UTC) Last edited by: Beate Pfau (21 May 2009 09:38:55 UTC) |
| Resource type: Journal Article BibTeX citation key: Ross1991a View all bibliographic details  |
Categories: General Keywords: Emydidae, Emydoidea, Emydoidea blandingii, Fortpflanzung = reproduction, Habitat = habitat, Nordamerika = North America, Schildkröten = turtles + tortoises Creators: Anderson, Ross Collection: Journal of Herpetology |
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| Abstract |
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Eight radio-tagged Blanding's turtles (Emydoidea blandingi), monitored from June 1983 to January 1984, used ponds more often than predicted on the basis of available habitat while marsh habitats were used less than their availability. Most wetlands used by the turtles had water <60 cm deep and summer water temperatures below 28.5 C. Five of eight turtles used marshes, ponds, and creeks, all in close proximity (≤900 m) to each other, between June and September, then moved to two adjacent, deep ponds for overwintering. Five overwintering sites contained organic substrates and had water depths >0.5 m. The activity centers of two males (0.57 ha and 0.94 ha) did not differ significantly in size from those of six females (x̄ = 0.56 ha, SD = 0.293). Male and female activity centers overlapped (x̄ = 12%, SD = 14.7), and female activity centers overlapped with those of other females (x̄ = 26%, SD = 16.5). Two males did not share activity centers, although other males were captured within them. Distances between activity centers of two males (260 m and 635 m) were not significantly different from those among centers of six females (x̄ = 489 m, SD = 338 m). Females moved significantly greater distances per day (N = 56, x̄ = 95.1 m, SD = 79.0) than did males (N = 21, x̄ = 48.4 m, SD = 41.2). Mean nest distances from water, and nonnesting activity centers, were 168 m (SD = 90.8 m) and 620 m (SD = 144.0 m), respectively. At least four nests were destroyed by predators within 24 h of completion, and all nests were eventually destroyed. Fourteen of 16 nests were in grasslands.
Added by: Admin Last edited by: Beate Pfau |