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.
online shopping in a short span of a few years, the rapid growth and achieved greater success, one of the reasons for attracting people to online shopping is the most important reason, I am afraid that the price difference. Admittedly, the price difference is a powerful weapon for C2C, but only as a price war as the future development of C2C advantage, this road can go far?
advertising is to identify the audience’s point of view, in the entire market segmentation, specific products have their own particular audience. So C2C is a price advantage to attract a part of the price sensitive crowd. There is no denying that more and more people online shopping, but this is only a small part of shopping life, Taobao’s annual trading volume does not mean that all the people in the online shopping. C2c trading volume is only less than 1% of traditional industry consumption. It can only be said to be a supplement to the traditional consumption habits.
is a personal experience, every time I see a strange message is SWAROVSKI crystal, brand shoes and clothes, I can not believe, I think as a brand price suddenly dropped, it’s hard to believe that the goods are genuine. As a single individual seller, the individual believes that the brand’s consumption is not assured that there is no quality assurance.
The integrity of the building
C2C site is still not perfect, online shopping while taking cash on delivery way, from a certain extent discourage consumers shopping for security reasons, and also established a set of credit evaluation system, but in the online consumption of the people know that we are often encountered with the kind of picture the difference is too large, the description is not consistent, easy to buy return difficult, customer service attitude is not good. But because the return postage themselves and cheap price shall not be prosecuted and other return rules, we choose silence. In essence, the quality of consumption is not high. Even some of the goods are very cheap, but we can not buy or can not wear, so it is not a waste of indirect it?
shopping malls and the goods are not the same as the existing chain group and brand is the result of long-term survival of the fittest survive, therefore no matter from the quality or service, buy in stores or brand counters, first in terms of quality guaranteed, followed by customer service service system is more flexible and convenient to return. The improvement of the quality of life, people are more concerned about the integration of goods within the value-added services.
The high demand for the services of
and ensure the quality of shopping and convenient way to create a new business platform, good purchase network, before the good purchase network, no one will be the traditional business into a third party platform, it is the first person to eat crab, is the perfect solution to the traditional business moved online, resolving the problem of standard business flow capital flow, logistics, commodity database, chain stores, brands and so on into the third platform. Just think, when such a third party platform appears, simply to the price of the king C2C can go far?