Friday, May 16, 2008

Franciscana Dolphins - Tracking Day #74

All of the banks are outside the mouths of the bays, with Kona to the south, Kure/Tunken in the middle, and Nahuel having returned to the vicinity of Canal de Culebra.

Thursday, May 15, 2008

Franciscana Dolphins - Tracking Day #72

Kure/Tunken have moved north to Canal de Culebra, while Nahuel has begun to return to Bahia San Blas. Kona remains in Bahia San Blas. Based on data from April 26 - May 7 , the following patterns were observed for the three dolphins with TDRs:

Dive Duration (44,111 dives):
0-30 seconds = 37% to 51% of dives
30-60 sec = 25% to 29% of dives
60-90 sec = 21% to 28% of dives
Max duration = >300 sec for all 3 dolphins (a few dives)

Dive Depth (44,884 dives):
0-5 meters = 40% to 53% of dives
5-10 m = 27% to 38% of dives
10-15 m = 12% to 23% of dives
Max depth = 25-35 m

Tuesday, May 13, 2008

Franciscana Dolphins - Tracking Day #71

Nahuel continues his movements to the north of the others, while they remain in Bahia San Blas.

Monday, May 12, 2008

Franciscana Dolphins - Tracking Day #70

Kure/Tunken remain together in Bahia San Blas, as does Kona. Nahuel is moving to the north, near Canal de Culebra.

Franciscana Dolphins - Tracking Day #69

Kure/Tunken are making typical movements through Bahia San Blas. Kona is at the mouth of the bay, and Nahuel continues his new movement pattern offshore of the sandbanks.