Methods to evaluate gut evacuation rates and predation using acoustic telemetry in the Tracy Fish Collection Facility primary channel

Table 1 Summary of acoustic tag data with date/time consumed and evacuated versus water temperature

Salmon tag code	Salmon length (mm FL)	Date/time tag consumed	Date/time tag evacuated	Elapsed time of tag evacuation (days)	Water temperature during tag retention (°C)
3961.10^a	165	21 June 2013 10:20	23 June 2013 9:15	1.96	22.22
6803.10^b	143	25 June 2013 15:28	28 June 2013 8:36	2.71	23.08
5333.10	145	25 June 2013 15:29	27 June 2013 12:41	1.88	22.66
6215.10^a	149	25 June 2013 15:35	27 June 2013 16:01	2.02	22.73
3667.10	142	25 June 2013 15:37	27 June 2013 0:09	1.36	22.50
3275.10	152	25 June 2013 15:39	27 June 2013 13:31	1.91	22.68
6509.10	145	25 June 2013 15:56	27 June 2013 15:28	1.98	22.71
4647.10^b	140	25 June 2013 16:00	28 June 2013 8:36	2.69	23.09
4059.10	148	25 June 2013 16:01	27 June 2013 5:54	1.58	22.58
5725.10	151	25 June 2013 16:10	27 June 2013 1:02	1.37	22.52
4843.10	131	29 June 2013 12:05	30 June 2013 17:08	1.21	25.61
3471.10^c	145	29 June 2013 12:14	30 June 2013 21:08	1.37	25.67
6705.10	151	29 June 2013 12:40	30 June 2013 17:06	1.18	25.62
5921.10	145	29 June 2013 12:46	1 July 2013 2:06	1.56	25.75

^aConsumed by striped bass (2897.18) of known length (588 mm FL); ^bconsumed by same predator of unknown length; ^cconsumed by striped bass (2729.18) of known length (505 mm FL). Elapsed times for acoustic tags to pass through the guts of predatory fishes are listed for each unique tag code/Chinook salmon pairing released in the Tracy Fish Collection Facility (Byron, CA) primary channel. Mean water temperatures during retention of tags in predators are provided, as are information on predators when known. FL, fork length.

ISSN: 2050-3385