Table 7. Generalized Additive Mixed Model results for factors affecting total catches, taking into account correction for technological creeping.

		df	F	P-value
Parametric Terms	as.factor(Period)	2	34.29	1.87e-12

s: smooth function represented using penalized regression splines

df: degrees of freedom

edf: estimated degrees of freedom

F: F-ratio test score

P-value: refers to the p-values from an ANOVA F-ratio test

“:”: interaction among terms

R-sq: The adjusted r-squared for the model. Defined as the proportion of variance explained

REML: Random efects maximum likelihood score

Family: gaussian; Link function: identity; Formula (Response variable as a function of predictor variables): catch_kg ~ s(kW, by = Period) + s(avg.depth) + Period + offset(Q) + s(Fisherman, bs = “re”, by = dummy var).