In conclusion, adult rats exhibited temporally-stable individual differences over weeks (SP) or months (USVs) of testing. The 50-kHz call rate was correlated with the relative prevalence of only one call subtype (short calls, negative correlation), but was positively correlated with absolute emission rates for almost all subtypes. Several inter-call subtype associations were detected, including a strong negative relationship between the relative prevalence of flat and trill calls. Rats differed consistently, not only in their 50-kHz call rates but also in their 50-kHz call profiles (i.e., the relative prevalence of 14 call subtypes) most rats preferentially emitted either trill or flat calls.

Correlational analysis revealed no significant relationships between SP and the three main USV measures. These measures showed temporally-stable individual differences across the initial 24-day testing period, and at the 3-month USV follow-up tests. The main measures were: SP, 50-kHz call rate, and relative prevalence of trill and flat call subtypes. SP was measured in simultaneous two-bottle choice tests, and USVs were recorded in an open field. To this end, 24 male Long-Evans rats were tested daily for 24 days, with alternating SP tests and USV recordings after a 3-month hiatus, USV emission was re-evaluated for 6 more days. Here, we have assessed whether SP and USV emission are correlated in the absence of a depressogenic procedure. As an alternative affect-related measure, adult rat ultrasonic vocalizations (USVs) are attracting interest, but it is unclear whether SP and USVs provide independent measures. Open the feature page to see how to use it.Sucrose preference (SP) is a widely used measure of anhedonia in rat models of depression, yet depressed patients do not reliably show an analogous deficit. On this page, discover the music notations available on our music notation software, Flat, organized by group of features and toolbars.

Trill flat io