Wild fish can recognize individual divers Publications of Michael R. Hall All genres Journal Article (2) Journal Article (2) 1. Journal Article Hall, M. R.: External stimuli affecting incubation behavior and prolactin secretion in the duck (anas-platyrhynchos). Hormones and Behavior 21 (3), pp. 269 - 287 (1987) MPG.PuRe DOI 2. Journal Article Reyer, H.-U.; Dittami, J.; Hall, M. R.: Avian helpers at the nest: Are they psychologically castrated? Ethology 71 (3), pp. 216 - 228 (1986) MPG.PuRe DOI