Nest survival analyses for asynchronous breeders

questions concerning analysis/theory using program MARK

Nest survival analyses for asynchronous breeders

Postby angept » Fri Aug 20, 2021 7:38 pm

Hello !

I am working on a particular species of seabird that does not have a well defined breeding season. This species has a reproduction cycle of about 8 months and can therefore reproduce at any time of the year. I have been following this species for 3 years and would have liked to do a nest survival analysis, however I don't think my data would fit with the MARK program.

Indeed, the breeding period for this species is 165 days (incubation + rearing). However I have only 98 burrows where I have data of the different stages of rearing (egg laying, elcosion (or not in case of failure), fledging (or not in case of failure)).
I still managed to create an inp file and I analyzed it under MARK but it puts me :

* * WARNING * * Maximum time exceeds number of occasions.

This is the head of my inp file :

nest survival group=1
28 126 126 0 1 ;
28 147 147 0 5 ;
28 147 147 0 5 ;
28 147 147 0 5 ;
28 147 147 0 5 ;
28 147 147 0 5 ;
28 147 165 1 3 ;

And I don't think the results of the model are correct because it is the exact same numbers.

However, I don't see how to create my inp file otherwise with my data.

Is there anyone who has already done this kind of analysis on an asynchronous species and could help me?
Does the time must be the same than the number of occasions?

Thank you

PS: sorry for any english mistake I'm not bilingual :)

thank you
angept
 
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Re: Nest survival analyses for asynchronous breeders

Postby egc » Sat Aug 21, 2021 11:12 am

Pas de souci. ;-)
egc
Site Admin
 
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Re: Nest survival analyses for asynchronous breeders

Postby Rotella » Sat Aug 21, 2021 11:48 am

I can take a look at your input file if you would like me to. You can send it to rotella@montana.edu.
Jay
Rotella
 
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