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Author Title Year Publication Serial Volume Pages (up)
Huizinga, H.A.; van der Werf, J.H.J.; Korver, S.; van der Meij, G.J.W. Stationary performance testing of stallions from the Dutch Warmblood riding horse population. 1. Estimated genetic parameters of scored traits and the genetic relation with dressage and jumping competition from offspring of breeding stallions 1991 Livestock Production Science 3962 27 231-244
Sakura O; Matsuzawa T Flexibility of wild chimpanzees nut-cracking behavior using stone hammers and anvils: an experimental analysis 1991 Ethology 3038 87 237
Dugatkin, L.A.; Alfieri, M. Guppies and the TIT FOR TAT strategy: preference based on past interaction 1991 Behavioral Ecology and Sociobiology 3397 28 243-246
Huizinga, H.A.; Korver, S.; van der Meij, G.J.W. Stationary performance testing of stallions from the Dutch Warmblood riding horse population. 2. Estimated heritabilities of and correlations between successive judgements of performance traits 1991 Livestock Production Science 3963 27 245-254
Beauchamp, G.; Kacelnik, A. Effects of the knowledge of partners on learning rates in zebra finches Taeniopygia guttata 1991 Animal Behaviour. 2115 41 247-253
Scheidhacker, M.; Bender, W.; Vaitl, P. Die Wirksamkeit des therapeutischen Reitens bei der Behandlung chronisch schizophrener Patienten 1991 Der Nervenarzt 5067 62 283-287
Pepperberg, I.M.; Brezinsky, M.V. Acquisition of a relative class concept by an African gray parrot (Psittacus erithacus): discriminations based on relative size 1991 Journal of Comparative Psychology 3610 105 286-294
Penzhorn,B.L.; Novellie, P.A. Some behavioural traits of Cape mountain zebras and their implications for the management of asmall conservation area 1991 Applied Animal Behaviour Science 1465 29 293-299
Penzhorn, B.L.; Novellie, P.A. Some behavioural traits of Cape mountain zebras (Equus zebra zebra) and their implications for the management of a small conservation area 1991 Applied Animal Behaviour Science 5074 29 293-299
Dugatkin, L.; Alfieri, M. Tit-For-Tat in guppies (Poecilia reticulata): the relative nature of cooperation and defection during predator inspection 1991 Evolutionary Ecology 2177 5 300-309