Sex differences in food hoarding behaviour of Long Evans rats.

Food hoarding was examined in male and female Long Evans rats. During a three-week period the animals were regularly submitted to the testing procedures, with food pellets in the home cage being either unrestricted (first week), or restricted (second and third week). When food pellets were present ad libitum, the hoarding scores were low, lower in females than in males. When food deprivation was imposed (second week), the animals responded by hoarding more pellets. This increase was more pronounced in males than in females. During the third week the hoarding scores became more or less stable, with males hoarding significantly more pellets than females.