how to get density from chimpanzee nests

[landry-hamas-elisee KADJO]

hello 

help me to get density from chimpanzee nests

Here's what I did with the CSV file to create a PNG image. I would like you to use the CSV file and create a tutorial to show me how to get the results. 

Thank you.

[Eric Rexstad]

Thanks for your question and welcome to the email group. Before I work through an analysis, I want to make sure I understand the design of the survey that generated the data. The design might not fully be described by the detections. This is particularly challenging if there are transects on which no nests are detected. That is why I ask.

There are four transects (TA14, TA34, TA38, TA49) each 1km in length and 36 detections. Is that correct? I also note 2/3 of the 36 detections are made on transect TA49; that will make uncertainty in your estimates quite large because of the variability in encounter rates between transects.

Your screenshot also shows estimates of nest production and nest disappearance times to use as multipliers, converting density of nests into density of chimpanzees. However, you also have the multiplier estimates appearing not only in the proper column, but also in the standard error and degrees of freedom columns. Those later two columns are for providing the uncertainty in those multipliers. Please describe how those multipliers were derived and what uncertainty is associated with them.

I also direct your attention to online training material we have regarding the use of multipliers in distance sampling analysis. Watch the videos and perhaps work through the exercise provided here

https://distancesampling.org/online-course/10-multipliers/multiplierslanding.html#exercise-materials

---

From: distance...@googlegroups.com <distance...@googlegroups.com> on behalf of landry-hamas-elisee KADJO <elisee...@gmail.com>
Sent: 24 July 2025 01:53
To: distance-sampling <distance...@googlegroups.com>
Subject: {Filename?} [distance-sampling] how to get density from chimpanzee nests

 

--
You received this message because you are subscribed to the Google Groups "distance-sampling" group.
To unsubscribe from this group and stop receiving emails from it, send an email to distance-sampl...@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/distance-sampling/c53f7e73-5a85-406c-983d-e2f63375013cn%40googlegroups.com.