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The effect of a conspecific's scent on the exploratory behavior of rats

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Osinski J., Malinski D., Walasek N.
Polish Psychological Bulletin
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2004
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vol. 35
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issue 2
105-108
EN
It is commonly assumed that the role of exploratory behaviors is essentially adaptive. One of the costs of exploration is the risk of exposure to factors reducing the chances of survival, therefore we might expect that the level of exploratory behavior is regulated according to the level of potential risk. In order to verify those assumptions, we conducted a study of rats' exploratory behavior in three environments: without a scent of another rat, with a scent of another rat, and with a scent of a resident rat. It was expected that the highest level of exploratory behavior would be demonstrated by the rats tested in the environment with a scent of another rat, and the lowest - by those tested in the environment marked by a resident. The results did not confirm those expectations. The lowest level of exploration was demonstrated by the animals tested in the environment devoid of another rat's scent. No significant statistical differences were observed between the remaining two groups. The results might suggest that the significance of another rat's scent should be considered in terms of information rather than emotional content.
2

EFFECTS OF HANDLING ON EXPLORATORY AND EMOTIONAL BEHAVIOR OF MALE AND FEMALE LEWIS RATS

100%
Matysiak J., Farley D., Trojan M., Osinski J.
Psychologia-Etologia-Genetyka
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2007
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vol. 15
75-88
EN
Exploration is considered to be a form of spontaneous activity and it seems to be a stable and phylogeniticaly old phenomenon. In laboratory conditions, many different methods are applied for measurement of activity motivated by need for stimulation. In our experiment we have decided to apply battery of tests - open field, elevated cross-maze and self-exposure chamber, assuming that these tests most fully and complementary measure various aspects of exploratory activity. Experimental factors influencing exploration activity which we decided to test are variables 'handling' and 'sex'. Obtained results show appropriate selection of research methods. An additive effect of experimental factors on indicators of exploratory behavior as well as on emotional behavior, except number of urinations in open field test and lack of interaction of 'handling' and 'sex' factors seems to support postulate of conducting research on mixed samples of males and females. Our results also confirm earlier signaled, existence of two independent motivational systems: one regulating behavior, aimed at new stimuli (expressed by alternation) and second adjusting general level of exploratory activity.
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