Observations on Neotricula aperta (Gastropoda: Pomatiopsidae) population densities in Thailand and central Laos: implications for the spread of Mekong schistosomiasis

Table 2 Fit of conventional linear models to the population density estimates for Neotricula aperta

Population	Simple Linear Regression			General Linear Model (Poisson)
Population	Equation (Density =)	Student's-t	P	Null deviance	Residual deviance	AIC	P
BKL (full)	−0.1055 t + 342.7367	−1.8540	0.113	104*	72.59	136.4	<0.0001
BKL (w/o outlier)	0.0096 t + 306.7542	1.4520	0.206	0.4918	0.3456	57.39	0.997
MHX (w/o outlier)	1.8038 t + 4056.1090	5.017 *	0.007	241.9 *	38.49	104.30	<0.0001

For the Simple Linear Regression, t represents time in weeks from the first sample (t = 0). A * indicates a statistically significant value for the test statistic.

ISSN: 1756-3305