August 17th, 2006 (09:19 pm)
Not too long ago Mats and I took a little visit to Oceanworld in Manly, the exhibit that stood out to me the most was one of the small tanks with the cuttlefish. Watching them there, hovering, reminded me of a really cool article I read not too long ago on the sexual tactics of the clever male Australian Cuttlefish.
The females who are heavily outnumbered are often guarded by the larger males who fight off competitors, so if you’re a smaller male what chance have you got at scoring with the few females?
Well, cuttlefish are masters of camouflage, their skin which is covered in chromatophores, iridophores and leucophores enables them to blend into any background flawlessly. So the smaller but clever males disguise themselves as females by changing their body shape and skin pattern, in doing this they and are able to swim right past any male guarding the female.
Hanlon who published these findings in the Journal Nature explained "You certainly do not fight the big male because he's going to beat you up very quickly and very easily," explains Hanlon. "So [small males] don't even engage in a fight, but they do what we call sneaking tactics: He hides the fourth arms (females only have three sets of arms), bulges his arms up like he's holding an egg, and he puts on a coloration pattern that's typical of females. And then, he just waltzes right in. And every single time that this happens, the big male looks and thinks he's acquiring another female mate and he lets him/her just swim right in next to the female. And as soon as he gets under the big male and he's next to the female, it's like, 'Okay, let's try a mating'."
Apparently the females love this and accept most mating attempts by them while rejecting most mating attempts by the larger males who try to bully their genes into the next generation.