Effects of acoustic tag implantation on lake sturgeon Acipenser fulvescens : lack of evidence for changes in behavior

Table 4 Output of GLMs used to analyze movement rates (speed-over-ground) of acoustic-tagged lake sturgeon

Phase	Model	IV(s)	df	AICc	w	D* (P)
I	1	Null (intercept only)	121	−157.0	0.00	141.8 (0.09)
	2	Direction	120	−179.3	0.00	139.3 (0.11)
	3	Release group	120	−154.8	0.00	141.8 (0.08)
	4	Year	120	−163.6	0.00	140.9 (0.09)
II	5	Direction, release group	119	−178.0	0.00	139.2 (0.10)
II	6	Direction, year	119	−188.7	0.56	138.2 (0.11)
III	7	Direction, year, release group	118	−186.6	0.19	138.2 (0.10)
IV	8	Direction, year, release group × direction	118	−187.0	0.24	138.1 (0.10)

IVs independent variables, df degrees of freedom, AICc Akaike’s Information Criterion, w Akaike weights, and goodness of fit statistics (scaled deviance, D*, and P value of associated Chi square test) for generalized linear models used to analyze movement rates (speed over ground) of acoustic-tagged lake sturgeon in the lower St. Clair River during 2012, 2013, and 2014. Release group identifies individuals observed 0–14 days post-surgery and simultaneously-observed conspecifics tagged in prior years. “Direction” (direction of movement) = upstream or downstream. The highest-ranking (best) model is italicized