IWC Southern Ocean Research Partnership

Assembled from 54 blocks · 2 evidence · 51 related

1. Story
2. A collaborative research programme formed within the IWC to continue work on Antarctic whale populations after the end of the SOWER survey series, with the Antarctic Blue Whale Project as a flagship. It is the reason the Antarctic subspecies has any modern time series at all: its dedicated voyages in 2013, 2015 and 2019 added 119 photo-identified whales to the Antarctic Blue Whale Catalogue, and its acoustic trends working group holds more than 300,000 hours of Southern Ocean passive acoustic data. Its existence is itself an argument - that after whaling ended, the only way to know what remained was to go and look on purpose.
3. Knowledge
4. Antarctic Blue Whale (B. m. intermedia)
5. Passive Acoustic Monitoring Arrays
6. Photo-Identification Cataloguing
7. International Whaling Commission
8. IWC Southern Ocean Research Partnership
9. Connections
10. Antarctic Blue Whale (B. m. intermedia)
11. International Whaling Commission
12. Passive Acoustic Monitoring Arrays
13. Photo-Identification Cataloguing
14. Dedicated Antarctic Blue Whale Project voyages
15. A capture-recapture abundance estimate for Antarctic blue whales is published
16. Southern Ocean
17. Blue Whale (Balaenoptera musculus)
18. IWC Southern Ocean Research Partnership
19. Commission for the Conservation of Antarctic Marine Living Resources
20. Whaling begins at Grytviken, South Georgia
21. The Antarctic blue whale catch reaches its all-time peak
22. The heaviest blue whale on record is weighed
23. Soviet fleets take protected whales and file false returns
24. The IWC protects blue whales from commercial hunting
25. Whaling ends at South Georgia
26. The commercial whaling moratorium takes effect
27. Dedicated Antarctic Blue Whale Project voyages
28. Blue whales are found back at South Georgia
29. The only published Antarctic blue whale satellite tracks are released as data
30. A capture-recapture abundance estimate for Antarctic blue whales is published
31. An individual Antarctic blue whale is re-sighted at South Georgia
32. Southern Ocean Whale Sanctuary
33. IWC Southern Ocean Research Partnership
34. The International Convention for the Regulation of Whaling is signed
35. Soviet fleets take protected whales and file false returns
36. The IWC protects blue whales from commercial hunting
37. The IWC adopts the commercial whaling moratorium
38. The commercial whaling moratorium takes effect
39. The Southern Ocean Whale Sanctuary is adopted
40. The true scale of Soviet whaling is published
41. Antarctic Summer Feeding Migration
42. IWC Southern Ocean Research Partnership
43. The 52 Hz call is identified in Navy hydrophone data
44. The SOSUS mission is declassified
45. Blue whale song frequencies are observed falling worldwide
46. Blue whales are found back at South Georgia
47. IWC Southern Ocean Research Partnership
48. Dedicated Antarctic Blue Whale Project voyages
49. Blue whales are found back at South Georgia
50. A capture-recapture abundance estimate for Antarctic blue whales is published
51. An individual Antarctic blue whale is re-sighted at South Georgia
52. Evidence
53. Antarctic blue whales produce a characteristic three-part Z-call: a first unit of 8-12 s at about 28 Hz, a short downsweep from 28 to 19 Hz, and a third unit of 8-12 s between 19 and 17 Hz, lasting up to about 18 s in total. The SORP Acoustic Trends working group had access to more than 300,000 hours of Southern Ocean passive acoustic data as of March 2020, collected over roughly twenty years from ships and moored recorders. V55 verification basis: retrieved in search summary attributed to these sources; neither paper was fetched.
54. A POPAN superpopulation estimate from Antarctic blue whale photo-identification collected between 2003/04 and 2018/19 gives 3,506 whales (95% CI 2,107-5,832), with abundance in the final study year, 2018/19, estimated at 1,817 (95% CI lower bound 714); SORP voyages in 2013, 2015 and 2019 added 119 individuals to an Antarctic Blue Whale Catalogue totalling 552. V55 verification basis: these figures were returned in the search result carrying the published abstract text and attributed to this paper.