Hi Eric,
Thank you so much for a speedy reply. It was very helpful.
I am currently doing work in Distance for Windows but I would like to move onto R at some point, especially given that I do have geographical strata that I am currently ignoring.
I have a couple of follow up questions though, if you have time.
1.) How many detections are sufficient per strata, I have between 40-70, do you think this is adequate?
2.) I have attached an image below for my model set up, have I estimated detection and density how you suggested? I.e. separately for each strata.
3.) I have done the analysis using both stratify by year and also post-stratify by year, I seem to get the same abundance/density estimates. What is the difference between the two?
Lastly, a lot of my analyses give an error message
**Warning: Parameters are being constrained to obtain monotonicity**
I have watched the distance course, and I am still unsure what this means and how to fix it. Could you please help?
Thanks again for all your help!
Fay