Images as proximity sensors: the incidence of conspecific foraging in Antarctic fur seals

Table 1 Details of animal-attached camera deployments on female Antarctic fur seals at Bird Island, South Georgia

Seal ID	Mass at outset (kg)	Mass at return (kg)	# images	# videos (h)	Trip start	Trip duration (days)	Duty cycle (h)	# photos/videos with other seals	# dives with other seals	# bouts with other seals	% light (>150) during deployment
W6160	49.0	46.0	2213		07/12/2000	4.73	All	0	0	0	7.2
W2955	40.0	40.0	3293		16/12/2000	6.71	All	8	6	3	14.4
W6710	38.5	41.0	911		27/12/2000	5.02	All	3	2	1	95.3
W6714	40.0	48.0		18 (0.44)	03/01/2001	6.61	All	4	4		89.5
W6726	41.5	43.0	930		03/02/2001	6.86	All	11	8	5	85.8
W6728	42.5	48.0	941		17/02/2001	8.31	All	33	25	8	77.2
W6508	42.5	40.5	2413		06/12/2001	6.16	All	1	1	1	5.6
W6554	30.5	34.5	2520		20/12/2001	15.74	All	0	0	0	4.4
W6714	46.5	46.5	2476		23/12/2001	7.01	All	1	1	1	3.8
W6559	36.5	36.0	2655		01/01/2002	4.12	1300–0100	3	3	3	11.2
W6561	39.5	39.0	2543		07/01/2002	6.66	1300–0100	0	0	0	30.9
W6722	37.5	43.0	3148		07/01/2002	5.71	1300–0100	1	1	1	12.5
W6059	37.5	39.0	1956		14/01/2002	3.16	1300–0100	2	1	1	11.9
W6565	35.5	38.5	2646		16/01/2002	3.68	All	0	0	0	19.8
W6568	39.5	42.5	2704		18/01/2002	2.89	All	54	28	5	61.4
W6570	42.5	45.0	2524		23/01/2002	5.30	All	4	3	3	4.2
W5745	40.5	42.0	2151		31/01/2002	4.96	All	0	0	0	13.3
W6651^a,b	43.0	43.5		48 (1.15)	17/12/2002	7.12	1200–0000	2	2		13.9
W6658	40.5	35.5	2074		21/12/2002	5.72	All	1	1	1	2.3
W6667^a,b	36.0	36.5		42 (0.99)	26/12/2002	9.88	1000–2200	16	16		66.6
W6037^a	42.0	46.0		106 (1.29)	28/12/2002	8.51	All	0	0	0	3.8
W6675	35.5	38.0		121 (2.71)	02/01/2003	12.30	All	2	2		0
W6680^a,b	37.0	40.5		34 (0.77)	04/01/2003	4.80	1100–2300	4	4		19.4
Total			38,098	369 (7.35)		151.96		122 images 28 videos	108	108

^aDeployments faced posterior
^bThis camera (W) used blue light LEDs (potentially more apparent to other seals), whereas all other cameras used LEDs in near-infrared range

ISSN: 2050-3385