Probability of obtaining nonzero catch 
226 
Fishery Bulletin 111(3) 
Probability of presence 
T 1 1 T 
90 110 130 150 
Positive catch only 
Black Sea Bass 
Tomtate 
Red Porgy 
Bank Sea Bass 
o 
ro 
o 
■o 
0 ) 
ro 
E 
Vermilion Snapper 
i 1 1 1 1 r 
50 70 90 110 130 150 
Overall 
Soak time (min) 
Figure 4 
Relationship between soak time 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 spe- 
cies of reef fishes on the basis of data from trap surveys conducted in the southeastern 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 probabil- 
ity 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. 
