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We investigate the behavior of cephalopods and other marine organisms, with emphasis on sensory biology and behavioral ecology. The functional morphology and neurobiology of the chromatophore system of cephalopods are studied on a variety of cephalopod species, and image analysis techniques are being developed to study crypsis and the mechanisms that enable cryptic body patterns to be neurally regulated by visual input.
Sexual selection theory is being tested using squid and cuttlefish. Field and laboratory studies focus on mechanisms of agonistic behavior, female mate choice, and sperm competition. The latter studies involve DNA fingerprinting to determine paternity and help assess alternative mating tactics. Population structure and reproductive success in several squid fisheries are being assessed for fishery management and conservation.
Senior Scientist Roger Hanlon
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Education:
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| 1969 |
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B.S. Florida State University |
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| 1975 |
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M.S. Rosenstiel School of Marine and Atmospheric Sciences,
U. Miami, FL |
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| 1978 |
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Ph.D. Rosenstiel School of Marine and Atmospheric Sciences,
U. Miami, FL |
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Recent Publications:
Hanlon, R.T.; Forsythe, J.W. 2008. Sexual cannibalism by Octopus cyanea on a Pacific coral reef. Marine and Freshwater Behaviour and Physiology. 41: 19-28. (abstract)
Hanlon, R.T.; Naud, M.-J.; Shaw, P.W.; Havenhand, J.N. 2005. Transient sexual mimicry leads to fertilisation. Nature 430: 212. (PDF)
Chiao, C.C.; Kelman, E.J.; Hanlon, R.T.. 2005. Disruptive body patterning of cuttlefish (Sepia officinalis) requires visual information regarding edges and contrast of objects in natural substrate backgrounds. Biological Bulletin. 208: 7-11.
Hanlon, R.T.; Shashar, N. 2003. Aspects of the sensory ecology of cephalopods. In: Sensory Processing in the Aquatic Environment. Collin, S.P.; Marshall, N.J. (eds.). Springer-Verlag.
Chiao, C.-C.; Hanlon, R.T. 2001. Cuttlefish camouflage: visual perception of size, contrast and number of white squares on artificial substrata initiates disruptive coloration. J. Exp. Biol. 204: 2119-2125.
Chiao, C.-C.; Hanlon, R.T. 2001. Cuttlefish cue visually on area—not shape or aspect ratio—of light objects in the substrate to produce disruptive body patterns for camouflage. Biol. Bull. 201: 269-270. (PDF)
See also full publication list |
