1. Diel and other patterns

2. Four ways to find diel patterns:
1. Look at 1hr display of data for daily cycle
This only shows the time period on the screen.
Data: Danielle Kreb

3. Four ways to find diel patterns:
2. Graph the diel pattern. Select these on the view + page:
and click here
This only shows the time period on the screen.

4. CP3 file has too few clicks (531) to be reliable
CP3 file has too few clicks (531) to be reliable. CP1 file, with 5million clicks shows a diurnal pattern. These must be non-cetacean clicks. Data: Danielle Kreb

5. Four ways to find diel patterns:
3. Look at the auto-correlation of 1hr click counts.
First double-click in the display area of the file of interest to select it for auto- correlation.
Click the ac.f button
This will show the auto-correlation for the whole file.

6. Borneo, Mahakam river, Muara Pahu
Borneo, Mahakam river, Muara Pahu. This is a very clear, stable 24 hour cycle:
… but what is making these sounds? Data: Danielle Kreb

7. Kawda file, CP1, all clicks
… There's correlation over 6 days, due to the monsoon noise. But there's a weaker daily pattern seen on top of it.
Data: Konkan Cetacean Research Team

8. Kawda file, CP3, dolphin clicks from GENENC
… Most of the 6 days ac.f has gone but the daily pattern persists, so that was due to dolphin clicks … + porpoises?

9. Kawda file, CP3, porpoise clicks from GENENC
… Finless Porpoises show only a weak 24 correlation, so it was due to the Humpback Dolphins.
Data: Konkan Cetacean Research Team

10. Four ways to find diel patterns:
4. Export the data into a database and do it all there…

11. ... nocturnal activity - dolphins in the Chesapeake River
Data: Bethany Roberts

12. A tidal pattern:
… the correlation peak for all clicks moves relative to the day
Data: Lighthouse Field Station

13. A tidal pattern:
… the correlation peak for dolphin clicks is static in tidal (93m) bins – their habitat use is tide-driven.
Data: Lighthouse Field Station

14. Encounter duration: Kawda file, CP3, Finless Porpoise clicks from GENENC
this line is the 95% confidence level
Use 1 or 5minute samples (bins) Encounter duration = 3 hours! i.e. if you hear an FP your chance of hearing another is significantly higher for the next 3 hours. For Humpback dolphins it's 4.5 hours.
Data: Konkan Cetacean Research Team

15. Landmark sequences
As a travelling porpoise approaches an acoustic landmark its clicks get faster. CPOD exe has automated detection and export of landmark sequences. See ‘Landmark poster.pdf’ Data: SAMBAH

16. Hope that made sense