Literaturdatenbank

WIKINDX Resources

Fraxe Neto, H. J., Brasil, M. A., Horta, G. D. F., Barros, T. O., Falcon, G. B., & Colli, G. R. (2011). Demography of acanthochelys spixii (testudines, chelidae) in the brazilian cerrado. Chelonian Conservation & Biology, 10(1), 82–90. 
Added by: Sarina Wunderlich (28 Aug 2011 21:15:08 UTC)
Resource type: Journal Article
DOI: 10.2744/CCB-0876.1
BibTeX citation key: FraxeNeto2011
View all bibliographic details
Categories: General
Keywords: Acanthochelys, Acanthochelys spixii, Chelidae, Habitat = habitat, Schildkröten = turtles + tortoises, Südamerika = South America
Creators: Barros, Brasil, Colli, Falcon, Fraxe Neto, Horta
Collection: Chelonian Conservation & Biology
Views: 5/411
Views index: 17%
Popularity index: 4.25%
Abstract     
We estimated demographic parameters for Acanthochelys spixii in Parque Nacional de Brasí lia, Distrito Federal, Brazil, based on 4 years of data collection, and also analyzed the effects of sex, temporal variation, and climatic factors on population dynamics. The adult sex ratio did not vary significantly from 11. By using the Akaike's information criterion, selection of candidate models constrained for climatic variables indicated that the interaction between total rainfall and average air temperature from the previous month as well as recapture probability (p) on a monthly basis explained most variation in demographic parameters, with a constant annual apparent survival (Φ) value of 0.82. Recapture rates during the study period varied from 0.01 to 0.23 and, during the dry season, from 0.01 to 0.04. The monthly average population size was 30 adult turtles, with values between 10 and 35 adults over 4 years. The annual population growth rates were 1.37 for 2005–2006 and 0.59 for 2006–2007. The small population size of Acanthochelys spixii seems characteristic of chelids in the area, and maintaining it depends on preserving natural ecosystems inside Parque Nacional de Brasília.
Added by: Sarina Wunderlich  
wikindx 4.2.2 ©2014 | Total resources: 14930 | Database queries: 58 | Script execution: 0.25504 secs | Style: American Psychological Association (APA) | Bibliography: WIKINDX Master Bibliography