Methods for assessment of short-term coral reef fish movements within an acoustic array

Table 1 Summary of acoustic receiver calibration experiments

Test	Variables	Location	Tags	Duration	VR2	Depth_rec	Method
1	Tag	Bayboro	2·120s 4·5s	90 min·120s^-1 30 min·5s^-1	5	2.5	Tags sequentially mounted 1 m from bottom, 5.5 m from center of receiver curtain
	Receiver
	Depth_tag
2	Tag	Tortugas II	2·120s	164 hrs	1	14	Tags simultaneously mounted, 2 m from bottom, 300 m from receiver
	Wind speed
	TOD
3	Distance	Tortugas I	1·5s	8 hrs	8	6 – 11	Tag suspended 3.5 m above digital video camera synced to surface GPS carried by SCUBA diver along bottom
3	Rugosity	Tortugas I	1·5s	8 hrs	8	6 – 11
4	Distance	Tortugas II	1·5s	8+ min·drop^-1	14	4 – 26	Tags individually mounted, 2 m from bottom, dropped at 150 m intervals between receivers (42 drop sites)
	Depth_rec
	Depth_tag
5	Distance	Tortugas II	5·5s (4·3H, 1·4H)	90+ min·drop^-1	12	4 – 35	Tags individually mounted, 2 m from bottom, dropped at 150 m intervals between receivers (66 drop sites)
	Wind speed
	Depth_rec
	Tidal phase
	Rugosity
	Meteorological
	Depth_tag

Where ‘VR2’ denotes number of receivers tested; ‘120s’ and ‘5s’ denotes tags with mean 120 sec and fixed 5 sec offtimes between pings, respectively; and, ‘Depth_rec’ and ‘Depth_tag’ denote water depth (m) at receiver site and tag drop site, respectively.

ISSN: 2051-3933