You are probably looking for something like unmarked package.

take a look at http://cran.r-project.org/web/packages/unmarked/vignettes/distsamp.pdf  for an overview of distance sampling implementing in unmarked. You can get more information on the cran website about this project

hope it helps!
Fer

________________________________
 De: Rainer M Krug <r.m.krug@gmail.com>
Para: r-sig-ecology <r-sig-ecology@r-project.org> 
Enviado: lunes 12 de diciembre de 2011 15:50
Asunto: [R-sig-eco] Distance sampling implementation in R?

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Hi

I was approached to do some analysis of bird census data using the
Distance program (http://www.ruwpa.st-and.ac.uk/distance/), i.e.
analyze distance sampling surveys to get estimates size or desity of
the birds.

As is stated on the website of the program Distance: ?

"Distance sampling is a widely used technique for estimating the size
or density of biological populations. Many distance sampling designs
and most analyses use the software Distance."

Nevertheless, I would ike to use R for this analysis. Has anybodu=y
experience with doing this kind of analysis with R? Which packlages
can be recommended? Ideas? Suggestions?

Thanks a lot,

Rainer

- -- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
Biology, UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

Tel :       +33 - (0)9 53 10 27 44
Cell:       +33 - (0)6 85 62 59 98
Fax :       +33 - (0)9 58 10 27 44

Fax (D):    +49 - (0)3 21 21 25 22 44

email:      Rainer@krugs.de

Skype:      RMkrug
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