Seasonal coastal residency and large-scale migration of two grey mullet species in temperate European waters

Table 3 Arrival and departure dates, residence duration, and Residency Index (RI) for thicklip mullet (N = 12) and thinlip mullet (N = 6) tagged in the western Dutch Wadden Sea

Species	Category	Median (DOY)	Median date	IQR (DOY)
Thicklip	Arrival	158	June 7	138–178
	Departure	259	Sept 17	243–285
	Residence duration	97		77–124
	RI	0.040		0.023–0.104
Thinlip	Arrival	135	May 16	131–138
	Departure	233	Aug 22	216–257
	Residence duration	94		82–121
	RI	0.186		0.129–0.243

Data include only detections recorded in return years and individuals detected for a total duration of > 5 days. Median values and interquartile ranges (IQR) are shown as day-of-year (DOY)

ISSN: 2051-3933