Table 14.

Mean values of copulatory parameters of the first series of copulatory activity of male LY/HY rat sub-lines at the first copulatory test with a receptive female rat (sexually naïve condition) and after at least 5 copulatory tests (sexually experienced condition): comparison with genetically heterogeneous Sprague-Dawley (SD) rats.

	Psychogenetically Selected Rat Sub-Lines
Copulatory Parameters	LY		HY		SD
	Naive	Experienced	Naive	Experienced	Naive	Experienced
ML	683	93 *	694	140 *	400	25 *
IL	2590	187 *	1499	226 *	500	30 *
EL	2655	345 *	2700	520 *	1200	520 *
MF	na	17	na	13	15	6 *
IF	na	10	na	8	21	10 *
PEI	na	300 *	na	380 *	470	360
EF	na	na	na	na	1	2.7 *
III	na	70	na	120 #	60	30 *
CE	na	0.59	na	0.45 #	0.60	0.72 *

ML, IL, EL = mount/intromission/ejaculation latency (seconds); MF, IF, EF = mount/intromission/ejaculation frequency; PEI = postejaculatory interval (seconds); III = inter intromission interval (seconds); CE = copulatory efficiency (for definitions see legend of Table 8 and Table 11). Experimental details and data for HY/LY rats are in [280] and Sprague-Dawley rats in [248]. na = not available. * = significantly different, experienced vs. naive, same rat sub-line, for each couple of rat sub-lines. # = significantly different, naïve/experienced HY subline vs. naïve/experienced LY rat sub-line.