En la primera fase (preprueba) las ratas debieron obtener elĪlimento que se encontraba en los contenedores del laberinto radial al final de cada brazo del laberinto. Se trabajó con 24 ratas macho divididas en tres grupos. Se evaluó el efecto del aprendizaje discriminativo previo sobre la conducta de búsqueda de alimento en el laberinto radial no elevado con It is discussed that hamsters have a win-shift strategy for hoarding behavior even when they do not need to remember the places visited, though they exhibited more pre-choice behaviors when searching for food in the depleting condition. However, more pre-choice behaviors and a longer center time were observed in the depleting condition than in the replenishing one. Results showed that, regardless of condition, animals were significantly more likely to visit new arms. We registered the number of new arms visited (hits), the time spent in the central area of the maze, and the behaviors emitted in the central area before each arm choice. In the present experiment, 12 hamsters were assessed in the RAM under 2 conditions: the depleting condition, in which feeders were not rebaited after each visit, and the replenishing condition, in which feeders were rebaited. When this response pattern is found, it is said that the animal remembers the places visited.
An accurate response pattern in the RAM is described as the tendency to visit a new arm after each choice (i.e., win-shift strategy). Rodents’ spatial memory is traditionally assessed in the radial arm-maze (RAM). (PsycInfo Database Record (c) 2021 APA, all rights reserved). These results suggest that, despite hamsters' limited tendency to use a beacon for navigation, they can flexibly use multiple strategies depending on their experience or environmental context. Finally, in Experiment 3, we confirmed that hamsters could easily learn to use the beacon when it was the sole cue for navigation. However, after experiencing the invalidity of such positional information, the original door was less frequently chosen in a rerun of the beacon relocation test (Test C). In Experiment 2, when we changed the shape of the apparatus to make the positional information of the goals other than the beacon invalid, a few individual subjects used the beacon (Test B'). The removal of the beacon had little effect on their performance (Test B).
When the beacon was placed nearer to another door, the hamsters predominantly chose the original door rather than those with the relocated beacon (Tests A and C). The goal, marked by a beacon, was fixed during the training phase. In Experiment 1, hamsters were trained to exit an arena through one of three doors. We investigated if and how Syrian hamsters (Mesocricetus auratus) show flexibility in their use of multiple sources of information in a spatial learning task.
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