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post #11 of 12 Old 10-10-2010
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Interesting StAnna.....our antifouling is black and a year ot two back had an experience with a mother humpback and calf. Definitely a case of mama coming over to check us out and then getting junior to join the party when she figured we were 'mostly harmless'.

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post #12 of 12 Old 10-10-2010
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Originally Posted by poopdeckpappy View Post
Toothed whales use sound for location and communication, baleen whales use sound for communication only. If you get tagged by a Blue ,Hump,gray or another baleen whales it merely a case of wrong place, wrong time. Ya tagged by a toothed whale that's a different story, they know you are there, may not know what's there, but they know something is
Not exactly. It used to be thought that mysticetes (baleen whales) couldn't echolocate at all, mainly because they lack the specialized anatomical structures used by odontocetes (toothed whales) for such, and because they don't produce the high-frequency tones once thought to be necessary. However, while it is true that they can't track down small objects (prey, etc.), it appears that at least some mysticete species probably use lower frequency sounds for navigating, such as finding the bottom and ice surfaces. The effect is probably similar to the way human blind individuals often use their own foot-falls or cane taps to detect large objects (walls, phone poles, etc.). Although rather crude by "normal" echolocation standards, such a system would be quite useful for whales in turbid and/or deep waters, or at night. However, I don't know if they could detect a small boat.
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