Table 2. Analysis of deviance for the AIC best model of presence or absence of Caribbean reef sharks by receiver with fixed effects only.

	Df	Deviance	Resid. Df	Resid. Dev	P(Chi)	Percent deviance
NULL			591	700.62
days	1	18.06	590	682.55	0.00	0.03
ldist	1	158.43	589	524.13	0.00	0.23
shark type	3	6.13	586	517.99	0.11	0.01
habitat	2	7.05	584	510.94	0.03	0.01

“Days” refers to days sampled by each receiver; “ldist” is log(distance).