Predation of archival tagged Dolly Varden, Salvelinus malma, reveals predator avoidance behaviour and tracks feeding events by presumed beluga whale, Delphinapterus leucas, in the Beaufort Sea

Table 1 Temperature changes immediately prior to, during, and after the pop-up satellite archival tag was inside the gastrointestinal tract of a presumed beluga whale

Event ID	Date	Time (UTC)	Event	Temperature (°C)	Duration from drop in temperature to recovery (hh:mm:ss) (± 00:07:29)
1	July 7, 2020	16:45:00	Last record from fish	2.1 (± 1.2)
2	July 7, 2020	16:52:30	Tagged fish ingested by predator	27.2 (± 1.2)
3	July 7, 2020	18:07:30	Ingestion	34.0 (± 0.15)^a
4	July 7, 2020	19:00:00	Ingestion	35.0 (± 0.15)
5	July 7, 2020	19:37:30	Stomach temperature stabilized	36.1 (± 0.1)	02:45:00
6	July 7, 2020	20:52:30	Ingestion	35.3 (± 0.15)
7	July 7, 2020	21:22:30	Stomach temperature stabilized	35.9 (± 0.1)	00:30:00
8	July 7, 2020	22:22:30	Ingestion	35.2 (± 0.1)
9	July 7, 2020	22:45:00	Stomach temperature stabilized	36.1 (± 0.15)	00:23:00
10	July 8, 2020	03:30:00	Ingestion	17.4 (± 0.75)^b
11	July 8, 2020	03:52:30	Stomach temperature stabilized	35.5 (± 0.75)	00:22:30
12	July 8, 2020	06:30:00	Ingestion	35.7 (± 0.2)
13	July 8, 2020	06:37:30	Stomach temperature stabilized	36.0 (± 0.2)	00:07:30
14	July 8, 2020	10:07:30	Ingestion	31.8 (± 0.2)^c
15	July 8, 2020	10:45:00	Stomach temperature stabilized	36.0 (± 0.2)	00:37:30
16	July 8, 2020	12:52:30	Tag expelled from predator	4.7 (± 1.05)

Event ID refers to times (at 7.5-min intervals) when the tag recorded a change in temperature attributed to ingestion, stomach temperature stabilization, or expulsion from the predator. Subsequent ingestions were considered if the temperature (+ error) dropped below the non-feeding stomach temperature of 36.1 °C
Recovery of non-feeding temperature was considered as the time that the temperature (+ error) was measured as 36.1 °C. Data were recorded at 7.5-min intervals; hence, temperature changes during the interval are underestimated, and recovery durations have an error of ± 7 min 29 s. Minimum temperatures reported in 6 h summary data that likely correspond to ingestion events specified in table
^aSeriesRange file reports minimum temperature of 33.5 °C during the 18:00 to 00:00 summary period on July 7, 2020
^bSeriesRange file reports minimum temperature of 13.8 °C during the 00:00 to 06:00 summary period on July 8, 2020
^cSeriesRange file reports minimum temperature of 31.3 °C during the 06:00 to 12:00 summary period on July 8, 2020

ISSN: 2050-3385