“…Several factors have strong implications for the assumption of proportionality between CPUE and stock abundance, including changes in resource distribution, fishing gear (Arreguín-Sánchez, 1996; Gibson-Reinemer et al, 2017), boat characteristics, time of the day when fishing operations are performed, changes in environmental conditions (Maunder & Punt, 2004), as well as those associated with fisher’s behavior patterns (Salas, Sumaila & Pitcher, 2004; Naranjo-Madrigal, Van Putten & Norman-López, 2015). Identification of some of these factors can provide insights on how to improve monitoring and assessment programs where limited capacity (budget or personal) exists (Maunder & Punt, 2004; Salas & Gaertner, 2004; Saldaña et al., 2017). One way to deal with variability of catch rates has been through the standardization of the CPUE, using Generalized Linear Models (GLM) and Generalized Additive Models (GAM) (Denis, Lejeune & Robin, 2002; Maunder & Starr, 2003; Maunder & Punt, 2004; Yu, Jiao & Carstensen, 2013; Campbell, 2015; Walsh & Brodziak, 2015; Montero et al, 2016).…”