Table 4 Analysis of deviance for the presence and absence (GLM Binomial) and positive frequency (GLM Gamma) of ectoparasite on five fish species (H. cunninghami, A. crinitus, G. marmoratus, Myxodes sp., O. jenynsi), two areas (Isla Santa María and Punta Coloso) and two seasons (Spring–Summer and Autumn–Winter).

From: Modelling seasonal patterns of larval fish parasitism in two northern nearshore areas in the Humboldt Current System

 

Likelihood ratio

Degree of freedom

P (Chi-sq)

Binomial model for presence/absence observations

Larval fish abundance

18.0349

1

2.17E−05*

Fish species

16.7486

4

0.002163*

Area

0.0613

1

0.804442

Season

2.3201

1

0.127708

Fish sp: Area

0.3967

3

0.94093

Gamma model for positive observations

Number of fish larvae

1.3225

1

0.2501

Fish species

20.778

4

0.0003*

Area

1.2838

1

0.2571

Season

13.8274

1

0.0001*

Fish sp: Area

11.6522

3

0.008*

  1. *Significant at P < 0.05.
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