How is effort Incorporated

[Kyleigh Fertitta]

Hi everyone,

I've been having a great time running my models in oSCR. It's super nice how I can have traps on/off in order to incorporate uneven sampling effort. I was just wondering if there was an explanation anywhere that talks about the mechanism behind how oSCR incorporates effort? Thanks!

[Chris Sutherland]

Glad to hear you are enjoying yourself 🙂 

The trap operation matrix is provided as a binary matrix (0=off, 1=off). All oSCR does is multiply the probability of any individual-by-trap-by-occassion observation by the trap operation matrix entry for that trap-occassion. In this way, only observations in closed traps are impossible (prob=0) and therefore don't contribute to the likelihood or estimation.

Hope that is helpful?

On Mon, Oct 6, 2025, 21:44 Kyleigh Fertitta <fert...@hawaii.edu> wrote:

Hi everyone,

I've been having a great time running my models in oSCR. It's super nice how I can have traps on/off in order to incorporate uneven sampling effort. I was just wondering if there was an explanation anywhere that talks about the mechanism behind how oSCR incorporates effort? Thanks!

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