Spatial distribution pattern of Mytilus chilensis beds in the Reloncaví fjord: hypothesis on associated processes

Table 5 Evaluation of the size distribution of mussels from zones and depth stratum (intertidal and subtidal)

Models	Number of parameters	AIC	Log likelihood	LR statistic	P (χ ² )
Common	5	13,100	−6544.9
Two depth stratum	6	12,977	−6482.6	124.587	2.20E-16
Boca vs other sectors	6	12,254	−6121.0	723.168	2.20E-16
Two zones	7	12,229	−6107.4	27.269	1.77E-07
Four zones	8	12,219	−6101.7	11.397	0.0007356
Full differences	10	12,052	−6015.8	171.677	2.20E-16

Using regression models for ordinal data (McCulagh, 1980).
Best model fit was determined by the lowest Akaike’s information criterion (AIC), and its statistical significance was assessed by a likelihood-ratio test (LR) with χ² distribution.

ISSN: 0717-6317