25.10.2014

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Use these free clip art images for your collections, school projects, website art and more. Blue whales are the largest marine mammals, the largest mammals, and indeed are the largest living creatures.
Antarctic blue whales are generally considered to range south of 55 degrees latitude during the austral summer.  Any blue whale observed north of 54 S, during the summer were found by whalers to be pygmy blue whales. At greater than 30 metres long, Antarctic blue whales were desirable and heavily targeted when commercial whaling operations on this species began in 1904.  Gathering in summer months in the polar region to feed on krill (Euphausia superba), the largest source of protein on the planet, the great blue whale herds have been reduced to less than 1% of their original population so that today perhaps as few as 3,500 remain. Using differences in their song patterns, blue whale sub-species have been further characterised into nine different worldwide bioregions. Individual calls are distinctive with high intensity (188 dB), low frequency (16-100Hz) and long duration.


One of the most intriguing uses of blue whale song is its use in estimating population size.  These sparsely distributed whales are extremely difficult to detect visually but if we take a page from their own book, we can detect individuals from perhaps hundreds or even thousands of kilometres away. Use these free images for your websites, art projects, reports, and Powerpoint presentations! Contact us with a description of the clipart you are searching for and we'll help you find it. If you can't find the clipart your looking for then please do not hesitate to get in touch and we will gladly help. When they dive below the surface the blue of the water is reflected into our eyes off their pale grey skin, and these intriguing animals appear to be blue! Is calling a means to spread individuals across a large area that may contain localised bursts of krill, and thereby signal its position to prospective mates?  So the better an individual is at locating food, and bragging about it, the more opportunities to mate it receives?


An incredible way to count them and then target scientific studies directly at the feeding or breeding hotspots in use, in real-time.  Basically we’ll be acting like blue whales ourselves!
Luckily our new partnership with our Defence Department gives us the acoustic technical skills to carry this through.



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