September 3, 2014

Brown-MBL Neuroscience Student Justine J. Allen Defends Dissertation

Justine Allen with her adviser Dr. Roger Hanlon

Justine Allen with her adviser Dr. Roger Hanlon

Justine J. Allen, a Brown-MBL graduate student in the Department of Neuroscience at Brown University and the Program in Sensory Physiology and Behavior at the MBL successfully defended her PhD dissertation entitled ‘Adaptive edge design for visual camouflage: Biomechanics of morphing 3D skin papillae in cephalopods and changeable cryptic body patterning in the slender filefish’ on Monday March 24th, 2014 at Brown University. She is advised by Dr. Roger T. Hanlon, Senior Scientist, at MBL.

Justine studied the functional morphology of the changeable, 3-dimensional skin papillae in several species of octopus and cuttlefish and found that most types of papilla are muscular hydrostats where movement and structural support are provided by muscles. One type of papilla was found to function by a buckling mechanism. Justine also performed a comparative study on the fixed, 3-dimensional dermal flaps of the slender filefish. This work contributes to our understanding of soft tissue actuation and the use of complicated skin projections for camouflage.

Justine’s research was supported by grants from the National Defense Science and Engineering Graduate Fellowship, National Science Foundation Graduate Research Fellowship and the Brown University – MBL Graduate Program.

Several publications have already been published on Justine’s research. For more information on her work see the following three citations:

Allen JJ, Bell GRR, Kuzirian AM, Hanlon RT. (2013) Cuttlefish skin papilla morphology suggests a muscular hydrostatic function for rapid changeability. Journal of Morphology. 274: 645-656.

Allen JJ, Bell GRR, Kuzirian AM, Velankar SS, Hanlon RT. (2014) Comparative morphology of changeable skin papillae in octopus and cuttlefish. Journal of Morphology. 275: 371-390.

Allen JJ, Akkaynak D, Hanlon RT. (In Review) Adaptive camouflage body patterning and dermal flap morphology in the cryptic slender filefish, Monacanthus tuckeri, on a coral reef. Biological Journal of the Linnean Society.