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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

From: 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

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)  
  1. 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
  2. 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
  3. aSeriesRange file reports minimum temperature of 33.5 °C during the 18:00 to 00:00 summary period on July 7, 2020
  4. bSeriesRange file reports minimum temperature of 13.8 °C during the 00:00 to 06:00 summary period on July 8, 2020
  5. cSeriesRange file reports minimum temperature of 31.3 °C during the 06:00 to 12:00 summary period on July 8, 2020
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Animal Biotelemetry

ISSN: 2050-3385