90-day Monitoring Report - National Marine Fisheries Service - NOAA

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detection events. Pacific walruses (Odobenus rosmarus divergens) were the most commonly detected and positively identified protected species during the survey with six detection events totaling 14 animals. The next most commonly detected protected species were bearded seals (Erignathus barbatus) with six detection events totalling 7 animals. 1 2 3 4 UME04085 R.V Marcus G. Langseth L-DEO/NMFS 05 January 2012 Total Number of Individuals by Species 5 10 14 7 1 2 22 5 9 Bearded Seal Common minke whale Humpback whale Killer whale Northern Fur Seal Pacific Walrus Ringed seal Spotted seal Unidentifiable pinniped Unidentified beaked whale Unidentified large whale Unidentified pinniped Figure 12. Number of individual animals observed. 5.1.1. Cetacean Detections Out of the 42 protected species detections, 7 were of cetaceans. There were 4 detections of unidentified cetaceans, one humpback whale, one common minke whale and one killer whale. The spatial distribution of cetacean detections can be seen in Figure 13.
Figure 13. Cetacean spatial distribution of detections during the Coakley two-dimensional (2D) marine geophysical survey. 5.1.1.1. Humpback whale Two humpback whales (Megaptera novaeangliae) were sighted on 9 September 2011 while the Marcus G. Langseth was underway to the survey sight. The airguns were not firing during the sighting, thus the whales were not exposed to received sound levels. 5.1.1.2. Killer whale Killer whales (Orcinus orca) were sighted only once during the acquisition of the Coakley marine geophysical survey. A pod of 5 killer whales were observed within the safety radii, though they were not exposed to the sound source due to the gun arrays being on board for the transit to the survey site on 11 September 2011. 5.1.1.3. Common Minke whale A common minke whale (Balaenoptera acutorostrata) was observed on 9 October 2011 during the transit back to port. The whale was observed within the safety radii, though it was not exposed to the sound source due to the gun arrays being on board for the transit. UME04085 R.V Marcus G. Langseth L-DEO/NMFS 05 January 2012 23
Page 1 and 2: Protected Species Mitigation and Mo
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Page 5 and 6: 1. EXECUTIVE SUMMARY The National S
Page 7 and 8: Figure 1. Location of the Coakley m
Page 9 and 10: 3. MITIGATION AND MONITORING METHOD
Page 11 and 12: day for a total of five to seven ho
Page 13 and 14: Acoustic monitoring for marine mamm
Page 15 and 16: 4. MONITORING EFFORT SUMMARY 4.1. S
Page 17 and 18: Survey Line UME04085 R.V Marcus G.
Page 21 and 22: minutes of simultaneous visual and
Page 23 and 24: 50 40 30 20 10 0 UME04085 R.V Marcu
Page 25: Number of Detections 12 10 8 6 4 2
Page 29 and 30: September. Each sighting involved o
Page 33 and 34: 6.1. MARINE MAMMALS KNOWN TO HAVE B
Page 35 and 36: 6.1.1. Spotted seal There were thre
Page 37: UME04085 R.V Marcus G. Langseth L-D
Page 41 and 42: (iii). The data listed under Condit
Page 43 and 44: (iii). Monitor radio frequencies an
Page 46 and 47: Attachments Table 1. Exclusion Zone
Page 52 and 53: Figure D.20: Hydrophone cable secur
Page 54 and 55: Record No. Date Time (UTC) 1 8-Sep
Page 56 and 57: Record No. Date Time (UTC) UME04085
Page 58: UME04085 R.V Marcus G. Langseth L-D

90-day Monitoring Report - National Marine Fisheries Service - NOAA

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