Table 6.
Timing (columns ‘acoustic presence’ and ‘acoustic peaks’) and intensity (columns ‘max. calls detected’, ‘CAB’ and ‘daily averaged FIN’) of fin whale 20-Hz pulses. In ‘acoustic presence’ months without recording effort are indicated by dots, whereas recorded month without acoustic presence are marked by dashes. Some site names are given in figure 1. References: [25–27,50]. Analysis types: ASC: automatic spectrogram correlation; FIN21, FIN89, FIN86 Fin whale index for different in-band versus off-band signal-to-noise ratios; MSC: manual screening. CAB: call abundance per hour calculated. Dashes indicate unavailable data or not applicable metrics.
| site | study | acoustic presence | analysis type | acoustic peaks | max. calls detected | CAB [h−1] | daily averaged FIN |
|---|---|---|---|---|---|---|---|
| S2 | SI 2004 |  |
ASC | 1 May and 2 May | 6000 and 6000/8 days | 31 and 31 | f = 1.8 and 1.8 → 3 dB |
| FIN89 | — | — | — | ||||
| S1 | SI 2004 |  |
ASC | 1 Apr and 2 May | 3500 and 3500/8 days | 18 and 18 | f = 3 and 3 → 5 dB |
| FIN89 | — | — | — | ||||
| S1/WAP | SI 2009 |  |
ASC | 3 Jun | 300/8 days | 2 | f = 1.6 → 2 dB |
| FIN89 | 3 Apr | — | — | ||||
| EI-AWI | this study |  |
MSC | — | 4301/1000 min | 258 | 15, 14 and 14 dB |
| FIN21 | 13 May, 14 May and 15 May | — | 14, 12 and 11 dB | ||||
| FIN86 | 13 May, 14 May and 15 May | ||||||
| EI-SCRIPPS | BP 2015 |  |
FIN21 | — | — | — | 22 dB |
| — | 14 Mar–14 Jul | — | — | ||||
| Scotia Sea | SI 2009 |  |
ASC | 3 Mar | 12 000/8 days | 63 | — |
| FIN89 | 3 Apr | — | — | f = 1,2 → 1 dB | |||
| sightings near EI | diverse |  |
— | — | — | — | — |
| Chile HA03 | SB 2019 |  |
ASC | — | 30, 30 and 50 | 30, 30 and 50 | — |
| FIN-17 | 7 Jun and 8 Jun and 9 May | — | — | 5, 5 and 10 dB | |||
| FIN-85 | — | — | — | 2, 2 and 3 dB | |||
| Chile HA03 | SB 2019 |  |
ASC | — | 70, 100 and 60 | 70, 100 and 60 | 10, 12 and 8 dB |
| FIN-17 | 14 Aug, 15 Sep and 16 Aug | — | — | 5, 6 and 5 dB | |||
| FIN-85 | — | — | — |