Gone with the wind: environmental variation influences detection efficiency in a coastal acoustic telemetry array

Table 2 Measured environmental variables for GLMM analysis of detection efficiency in a small-scale range test array (N = 5 receiver stations)

Data	Measurement location	Units	Mean (SD)	Min	Max	Measurement frequency
Temperature	Jetty	° Celsius	6.9 (0.6)	5.1	8.0	10 min
Salinity	Jetty	PSU	29.4 (1.2)	26.5	31.5	10 min
Relative water level	Den Helder	m	0 (0.5)	− 1.3	1.1	1 h
Wind direction	De Kooy	°	192.8 (72.1)	10	360	1 h
Wind speed	De Kooy	m/s	5.2 (3.2)	1	19	2 h
Precipitation	De Kooy	mm	0.2 (0.5)	0	5.8	3 h
Bottom depth	Per station	m NAP	− 7.6 (6.0)	− 2.3	− 22.3	Single measurement
Topographic position index	Per station	Proportion	− 0.1 (0.3)	− 0.6	0.3	Single measurement

Continuous measurements were recorded by the NIOZ monitoring platform (jetty) in the Marsdiep or by measurement stations of the Royal Netherlands Meteorological Institute (KNMI) in Den Helder and De Kooy. Bathymetric data were made available by Rijkswaterstaat. Data were binned to hourly intervals for comparison to hourly detection efficiency. Data from receiver pairs separated by > 800 m distance were excluded

ISSN: 2050-3385