منابع مشابه
Beaked whales
with other cats. Finally, cats need to read and understand human behaviour better (which is where dogs have really excelled). Bradshaw argues that early socialisation and training can help achieve some of these goals, but that we should also consider selective breeding of behaviour. Controversially, the author is suggesting that widespread neutering in the UK be relaxed, arguing that the practi...
متن کاملWhales from Space: Counting Southern Right Whales by Satellite
We describe a method of identifying and counting whales using very high resolution satellite imagery through the example of southern right whales breeding in part of the Golfo Nuevo, Península Valdés in Argentina. Southern right whales have been extensively hunted over the last 300 years and although numbers have recovered from near extinction in the early 20(th) century, current populations ar...
متن کاملRight rare whales
The collapse of the International Whaling Commission's discussions on the resumption of limited commercial whaling only highlights the pressure that still exists on these species. And new evidence from a survey of one population reveals how perilous it is, even after the 24-year moratorium on commercial whaling. The North Pacific right whale was the subject of hunting in the gulf of Alaska from...
متن کاملChanges in dive behavior during naval sonar exposure in killer whales, long-finned pilot whales, and sperm whales
Anthropogenic underwater sound in the environment might potentially affect the behavior of marine mammals enough to have an impact on their reproduction and survival. Diving behavior of four killer whales (Orcinus orca), seven long-finned pilot whales (Globicephala melas), and four sperm whales (Physeter macrocephalus) was studied during controlled exposures to naval sonar [low frequency active...
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ژورنال
عنوان ژورنال: Nature
سال: 1977
ISSN: 0028-0836,1476-4687
DOI: 10.1038/269006c0