Effects of Snail Density on Growth, Reproduction and Survival of Biomphalaria alexandrina Exposed to Schistosoma mansoni

Table 2

Minimal adequate model for number of eggs laid per snail per week, determined using deletion testing as before.

Fixed terms	Coefficient	t-value	$P$ -value
Intercept	16.76	8.84	<.0001
Day	−0.17	−4.27	<.0001
Density	−0.49	−6.21	<.001
Exposure to parasite	−2.86	3.23	.01
Day: density	0.005	2.96	.0038

Log likelihood = −349.99, DF = 104.