Homologous Legs Mini » Killer Whales http://mini.naontiotami.com Micro-evolutionary bursts of change Mon, 09 Aug 2010 23:26:23 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 Even killer whales cannot escape the pull of evolution http://mini.naontiotami.com/2010/01/even-killer-whales-cannot-escape-the-pull-of-evolution/ http://mini.naontiotami.com/2010/01/even-killer-whales-cannot-escape-the-pull-of-evolution/#comments Thu, 07 Jan 2010 11:26:04 +0000 naontiotami http://mini.naontiotami.com/?p=48 Two kinds of killer whale have been found in UK waters, prompting evolutionary biologists to posit that the species of dolphin may be undergoing a speciation event.

The differences are fairly obvious – one kind, dubbed Type 1 had significant adult tooth wear, showing that they feed primarily by sucking up fish into their mouths, while Type 2 showed no wear at all. Type 2, on the other hand, seem to prey on other dolphins and small whales. Type 2 males also seem to be up to two meters larger than Type 1 males.

Evolution in action – an amazing thing.

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