Eastern North Pacific Blue Whale Migration

Assembled from 34 blocks · 2 evidence · 21 related

1. Story
2. The best-resolved blue whale migration anywhere: summer and autumn feeding in the California Current, then a southward movement in winter to waters off Baja California, into the Gulf of California, and out to the Costa Rica Dome in the eastern tropical Pacific. It was reconstructed from satellite telemetry rather than from sightings - Argos tags were attached to 159 whales, mostly off California in late summer, between 1993 and 2007, of which 92 tracks ran longer than seven days, and a wider programme tagged 171 animals between 1993 and 2008. The Gulf of California was confirmed as a wintering ground when five whales tagged in 1999 spent the winter there. The timing of arrivals suggests the Costa Rica Dome functions as a calving and breeding area, which is an inference from movement, not a direct observation of calving.
3. Knowledge
4. Eastern North Pacific Blue Whale Migration
5. Gulf of California
6. Costa Rica Thermal Dome
7. California Current System
8. Satellite Telemetry Tagging of Large Whales
9. Connections
10. Satellite Telemetry Tagging of Large Whales
11. California Current System
12. Costa Rica Thermal Dome
13. Gulf of California
14. Satellite tagging of eastern North Pacific blue whales begins
15. Tagged whales confirm the Gulf of California as a wintering ground
16. Eastern North Pacific blue whales are estimated near carrying capacity
17. Eastern North Pacific Blue Whale Migration
18. Satellite tagging of eastern North Pacific blue whales begins
19. Tagged whales confirm the Gulf of California as a wintering ground
20. Pygmy blue whale movements between Australia and Indonesia are published
21. The only published Antarctic blue whale satellite tracks are released as data
22. Eastern North Pacific Blue Whale Migration
23. Santa Barbara Channel
24. Seasonal Krill Aggregation
25. Satellite tagging of eastern North Pacific blue whales begins
26. Eastern North Pacific blue whales are estimated near carrying capacity
27. Eastern North Pacific Blue Whale Migration
28. Eastern North Pacific Blue Whale Migration
29. Bahia de Loreto National Park
30. Bahia de Loreto National Park is established
31. Tagged whales confirm the Gulf of California as a wintering ground
32. Evidence
33. Transmitters were attached to 171 blue whales off California and in the Gulf of California between 1993 and 2008; a related analysis used 159 Argos tags deployed mainly off California in late summer between 1993 and 2007, of which 92 tracks exceeded seven days. Tagged whales moved south in winter to Baja California, the Gulf of California and waters at and west of the Costa Rica Dome; five whales tagged in 1999 wintered in the Gulf of California, identifying it as a wintering ground. V55 verification basis: retrieved in search summary attributed to these sources; neither the institute page nor the preprint could be fetched.
34. The eastern North Pacific blue whale population was estimated at 91-97 percent of carrying capacity in 2013, and the analysis concluded that ship strikes did not pose an immediate threat to its recovery. V55 verification basis: retrieved in search summary attributed to this paper; the paper was not fetched, and the conclusion has been discussed critically since without a reassessment being retrieved here.