- Jana Joy Watson, Female Mating Behavior in the Context of Sexual Coercion and Female Ranging Behavior of Bottlenose Dolphins (Tursiops sp.) in Shark Bay, Western Australia (2005)
- Brooke Lowry Sargeant, Foraging Development and Individual Specialization in Wild Bottlenose Dolphins (Tursiops sp.) (2005)
- Quincy Anne Gibson, The development of social relationships within a fission-fusion society: Patterns of association and social interaction in wild bottlenose dolphin calves (Tursiops sp.) in Shark Bay, Western Australia (2007)
Tuesday, February 10, 2009
Tool-use and innovation in wild bottlenose dolphins
Last month, I saw this article about wild bottlenose dolphins in Spencer Gulf, South Australia, preparing cuttlefish to eat by deboning and ridding them of ink. Last night, thanks to CANZ and STIA, I had the pleasure of hearing a presentation by Georgetown University professor Janet Mann, who described what she and her students have observed in the wild bottlenose dolphins in Shark Bay, Western Australia. Several dozen of the dolphins she has been studying demonstrate a behavior she calls "sponging." They carry sponges in their beaks to scare up a certain kind of fish from the sandy floor of the bay. She and her team have identified sponging as the first clear case of tool use by wild dolphins, whose brains are proportionally three times as big as chimpanzees. The have also determined that sponging is socially learned behavior, passed down from the mother, and that sponging dolphins spend more of their time (17%) foraging for food than their non-sponging counterparts. "It turns out the brainiacs of the marine world can also be tool-using workaholics, spending more time hunting with tools than any nonhuman animal,” Mann says. The Ruler Lady has been aware of this unique research opportunity in Australia because she has checked and accepted the dissertations of several of Mann's doctoral advisees. Listed below are the three most recent:
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animals,
Janet Mann
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