Table 6.

Best GAMLSS models for the parasite species (NSPP) and individual numbers (NIND) of Syacium papillosum

Model	df	Global deviance	Percent of explained deviance	Akaike information criterion	P
NSPP ~ (ZONE) + cs(FE) + cs(NO3)	12	44.57	44.30	68.57	< 0.001
NIND~ cs(ZOOVOL) + cs(ASUMALI) + cs(SSUMPAH) + cs(LT) + cs(NOFISH) + cs(S235TRI) + cs(SANTR) + cs(ICTABU) + cs(ACEN)	41	20.73	91.13	102.73	< 0.001

Notes: The best GAMLSS model was selected using a stepwise procedure and the lowest values of AIC and global deviance. The independent variables (those without cs) had a linear relationship with the dependent variables

Abbreviations: ACEN, acenaphthylene in water; ASUMALI, sum of aliphatic hydrocarbons in water; cs, cubic spline smooth function; df, degrees of freedom; FE, fishing effort; ICTABU, ichthyoplankton abundance; LT, fish total length; NOFISH, number of fish per sampling station; NO₃, nitrates concentration in water; SANTR, anthracene in sediment; SSUMPAH, sum of polyaromatic hydrocarbons in sediment; S235TRI, 2,3,5, trimethylnapthalene; ZONE, fishing zone in the Yucatan Peninsula; ZOO, zooplankton volume in water