I am running robust design for small mammal data and all of my models show a deviance of zero. Has anyone experienced this before or know why this might be happening? My data consists of 4 primary periods with 4 secondary periods within each primary. There are two groups in data set (two sites). I am also using 2-age groups for survival, as standard CJS models indicate my data fit that better than standard time-dependent models.
Any thoughts would be greatly appreciated, thanks.
Brian