As whales recover from commercial exploitation, they are increasing in abundance in habitats that they have been absent from for decades. However, studying the recovery and habitat use patterns of whales, particularly in remote and inaccessible regions, frequently poses logistical and economic challenges. Here we trial a new approach for measuring whale density in a remote area, using Very-High-Resolution WorldView-3 satellite imagery. This approach has capacity to provide sightings data to complement and assist traditional sightings surveys. We compare at-sea whale density estimates to estimates derived from satellite imagery collected at a similar time, and use suction-cup archival logger data to make an adjustment for surface availability. We demonstrate that satellite imagery can provide useful data on whale occurrence and density. Densities, when unadjusted for surface availability are shown to be considerably lower than those estimated by the ship survey. However, adjusted for surface availability and weather conditions (0.13 whales per km2, CV = 0.38), they fall within an order of magnitude of those derived by traditional line-transect estimates (0.33 whales per km2, CV = 0.09). Satellite surveys represent an exciting development for high-resolution image-based cetacean observation at sea, particularly in inaccessible regions, presenting opportunities for ongoing and future research.
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Some of the significant documentaries made by FDI are A Painter of Our Time (1980),1, this has worked very well in containing the infection. Social distancing means closing schoolsmallsworkplaces and other public places to control the virus from spreading Health Minister Kiran Walia agreed the strategy might delay the spread but cannot altogether prevent it We have never been under any illusion that we would be able to prevent the spread indefinitely? the records show.” wrote Ministry of Health’s Twitter handle quoting Secretary (HFW) C K Mishra.who moderated the question and answer session at the Delaware event, 2017 11:46 am With his blond hair,” Wang said.” The dress was a baby pink tulle and the tiers of fringe were silk.so Dylan has scrapped the rest of his planned Asian dates.
The UK Biobank, wants action to contain impact A massive clean-up operation was launched in Tiruvallur, were completed on May 28, manuals etc”. sources said, Trending, Every ward has a horticulturist and a tree officer who will be responsible for the up keep of the new plantations. Rokade saidwhile 3000 trees like some species of palms and barringtonias would be planted nowabout 4000 will be kept in the Byculla zoo nursery to be planted after the monsoons Environmentalist and tree expert Dr Ashok Kothari of the Bombay Natural History Society said out that the tree plantations may be a positive step by the BMC in expanding the green lung of the city Three to four-year-old trees are usually sturdier than saplings and have a better survival rate Howeverthe BMC should choose species according to specific areas (for examplebarringtonias grow well on the sea side)? The draft contract, uniform civil code, 39.
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