Literaturdatenbank
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Bujes, C. S., & Verrastro, L. (2009). Nest temperature, incubation time, hatching, and emergence in the hilaire's side-necked turtle. Herpetological Conservation and Biology, 4(3), 306–312.
Added by: Admin (28 Dec 2009 19:56:58 UTC) |
| Resource type: Journal Article BibTeX citation key: Bujes2009 View all bibliographic details  |
Categories: General Keywords: Chelidae, Fortpflanzung = reproduction, Habitat = habitat, Phrynops, Phrynops hilarii, Schildkröten = turtles + tortoises, Südamerika = South America Creators: Bujes, Verrastro Collection: Herpetological Conservation and Biology |
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| Abstract |
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Phrynops hilarii The nest dimensions, physical characteristics of the eggs, thermal exposure, incubation period, and hatchling emergence were investigated. A total of 12 nests were monitored: six (N = 50 eggs) in natural conditions and six (N = 28 eggs) in artificial conditions. Nests constructed by females have an aperture, a neck, and an incubation chamber with mean dimension of 143 by 126 mm. Eggs (N = 78) were characterized as spherical, 34 x 32 mm, with a calcareous shell and mean mass of 21.5 g. The incubation period varied from 157 to 271 days, in natural conditions, and from 130 to 191 days under artificial conditions; whereas, hatching success varied from 43 to 75%, and from 50 to 100%, respectively. The mean temperature inside the natural nests ranged from 24.2 to 27.3°C; whereas, under artificial conditions it ranged from 18.8 to 28.6°C. Significantly more hatchlings emerged from eggs incubated under artificial conditions than from natural nests.
Added by: Admin |