Video S2. Presentation of pup models imitating different age-classes to an Australian sea lion female from The role of visual cues in mother–pup reunions in a colonially breeding mammal
mediaposted on 06.11.2017, 14:59 by Kaja Wierucka, Benjamin J. Pitcher, Robert Harcourt, Isabelle Charrier
Example 1: Non-aggressive response to congruent model. A female is presented with two pup models, one imitating an A2 pup (on the right; congruent), one representing visual characteristics of an A1 pup (left; incongruent). The female approaches the congruent model first, in a non-aggressive manner and investigates (sniffs) it more times than the incongruent model. Example 2: Aggressive response to incongruent model. A female is presented with two pup models, one imitating an A1 pup (on the right; congruent), the other imitating an A3 pup (left; incongruent). The female approaches the incongruent model and starts biting it and finally grabs and throws the model several meters away. Pups of the tested females were present at the time of the experiments (visible at the end of the video), however they were at least one body length away from their mother and models were presented on the opposite side of the female than the pup, such that the pup was not in the same field of view as the pup models.