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Boyle, M.C., FitzSimmons, N.N., Limpus, C.J., Kelez, S., Velez-Zuazo, X. & Waycott, M. 2009. Evidence for transoceanic migrations by loggerhead sea turtles in the southern Pacific Ocean. Proc. R. Soc. B. 276: 1993-1999. 
Fedurek, P. & Dunbar, R.I.M. 2009. What does mutual grooming tell us about why chimpanzees groom? Ethology 115: 566-575. 
Gonda, A., Herczeg, G. & Merila, J. 2009. Habitat-dependent and independent plastic responses to social environment in the nine-spined stickleback (Pungitius pungitius) brain. Proc. R. Soc. B. 276: 2085-2092. 
Ings, T.C., Raine, N.E. & Chittka, L. 2009. A population comparison of the strength and persistence of innate colour preference and learning speed in the bumblebee Bombus terrestris. Behavioral Ecology and Sociobiology. 63: 1207-1218.
Raine, N.E. 2009. Cognitive ecology: environmental dependence of the fitness costs of learning. Current Biology 19: R486-R488. 
Ridley, A.R. & Child, M.F. 2009. Specific targeting of host individuals by a kleptoparasitic bird. Behavioral Ecology and Sociobiology. 63: 119-1126.