Table 1.

Overview of individual, capture/tagging and noise-related information for each of the five harbour porpoises exposed to short-term pulses from a single airgun in the inner Danish waters between March and November 2014. Note that horizontal (location) movement data were missing for porpoise ID 5 and as such distance to exposure site could not be obtained and noise levels (given as L_pp, L_eq-fast and SEL) could not be estimated. Date and time (local) are given as YYYY-MM-DD, HH:MM.

porpoise ID number	ID1	ID2	ID3	ID4	ID5
sex	male	male	male	female	female
body mass (kg)	31	30	37	30	36
standard length (cm)	122	143	143	136	122
mass/length index	0.25	0.21	0.26	0.22	0.29
location data available	yes	yes	yes	yes	no
ARGOS no.	2014-138066	2014-138072	2014-83307	2014-83303	2014-06421
dive data available	yes	yes	yes	no	yes
date and local time of porpoise release	2014-06-02, 12:00	2014-11-13, 13:25	2014-11-21, 11:30	2014-11-21, 11:38	2014-03-20, 13:40
date and local time of porpoise exposure	2014-06-05, 17:10	2014-11-17, 13:21	2014-11-25, 13:43	2014-11-26, 12:54	2014-03-24, 12:37
hours from release to exposure	77	96	98	121	95
distance (m [50% range]) from exposure	690 [345–1035]	610 [305–915]	420 [210–630]	550 [275–825]	—
Beaufort sea state during exposure	0	2	1	1	0
sediment type at exposure site	sand	diamicton	sand	sand	muddy sand
bathymetry (m) at exposure site	25.2	11.3	45.4	16.1	35.7
slope (°) of seabed at exposure site	0.9	0.3	0.7	0.2	0.14
porpoise depth (m) at start of exposure	13	0	0	—	0
mean porpoise depth (m) during exposure	13	5	14	—	2
Lpp (estimated mean [range] dB re 1 µPa peak–peak)	168 [165–173]	169 [166–174]	171 [168–177]	169 [166–175]	—
Leq-fast (estimated mean [range] dB re 1 µPa over 125 ms)	147 [144–152]	148 [145–153]	150 [147–156]	148 [145–154]	—
SEL (estimated mean [range] dB re 1 µPa2s)	138 [135–143]	139 [136–144]	141 [138–147]	139 [136–145]	—
date and local time of tag release	2014-06-08, 03:11	2014-11-25, 12:00	2014-12-01, 20:00	2014-12-03, 23:11	2014-03-26, 06:44