denying years

[Luc te Marvelde]

I have got quite a long series of ringed birds (and their resigntings). In 1995 we have not been ringing any birds... Question: Can we calculate a survival-/recapturerate for this year, or do I have to do something so that this years wil not be estimated (and how do I do this)?

Thanks in advance,

Luc te Marvelde

[DMills]

You haven't really provided enough info on your analysis for a comprehensive answer. Are you tagging chicks and looking at annual changes in survival? - or tagging adults ? etc .

Just taking things on face value, there is no problem with having a year where no banding took place - this will simply be reflected in the encounter histories file, and there is no need to alter the analysis in any way. The data on resighting in 1995 will still give you valuable information on survival of birds banded in other years.

[Luc te Marvelde]

Thanks. When I read it agian i see there's little information in my question. We do ring chicks (of larus melanocephalus) en sometimes adults.

Thanks for your answer. I now know that we can estimate a survivalrate for the year in which we did not ring any chick/adult.

Luc