1 / 13

The National Marine Mammal Laboratory Polar Ecosystems Program Ice Seal Abundance and distribution

Spotted seal. Ringed seal. Bearded seal. Ribbon seal. The National Marine Mammal Laboratory Polar Ecosystems Program Ice Seal Abundance and distribution. Identifying distance for sightings. A. H. X. Distance. Time. Strip transect. ?. What about the area under the helicopter?.

erwin
Download Presentation

The National Marine Mammal Laboratory Polar Ecosystems Program Ice Seal Abundance and distribution

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Spotted seal Ringed seal Bearded seal Ribbon seal The National Marine Mammal Laboratory Polar Ecosystems Program Ice Seal Abundance and distribution

  2. Identifying distance for sightings A H X Distance Time

  3. Strip transect ? What about the area under the helicopter? Assume 100% seen Altitude Seals counted as prop. of area Distance from track line

  4. Digital Camera photographs area under helicopter Image every two seconds Geo-rectified

  5. Shipboard Surveys Helicopter Surveys Cruise Leg On Effort Distance No. Seals On Effort Distance No. Seals Healy 0701 112 hrs 17 min 933.3 994 36 hrs 40 min 3327.0 1085 Healy 0702 19 hrs 33 min 182.7 121 12 hrs 15 min 1087.4 482 Total 131 hrs 50 min 1116.0 1115 48 hrs 55 min 4414.4 1567 Photo: Janet Warburton Photo: Art Howard

  6. Capture and instrument

  7. Hauling out behavior May Oct. Proportion of animals hauled out 00:00 06:00 12:00 18:00 23:59 Time of day (Local)

  8. Ribbon seals through Aug. 2007

  9. Spotted seals through Aug. 2007

  10. -3.0°C 8.0°C CTD tag - Temperature

  11. CTD tag – Conductivity/Salinity 20 mS/cm2 40 mS/cm2

More Related