Probability of obtaining nonzero catch 
228 
Fishery Bulletin 111(3) 
Probability of presence 
Positive catch only 
Overall 
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Figure 5 
Relationship between fish accumulation (total fish per trap) and the probability of obtaining a nonzero catch 
(probability of presence) (left column), estimated catch when present (middle column), and estimated overall 
catch (right column) for 8 species of reef fishes on the basis of data from trap surveys conducted in the south- 
eastern U.S. Atlantic by the Marine Resources Monitoring, Assessment, and Prediction Program (1990-2011) 
and the Southeast Fishery-independent Survey (2010-11). Binomial generalized additive models (GAMs) were 
used to estimate probability of obtaining nonzero catch. Gaussian GAMs were used to estimate catch when 
present. Overall catch was determined through the combination of binomial and Gaussian GAM estimates. 
Dashed lines indicate 95% confidence intervals. 
