Table 2. Bull sperm migration in columns with temperature gradients (34–42ºC).

Temp. (ºC)	Low temp		High temp
	No. sperm	%	No. sperm	%
38	276.9 ± 36.4	45.2	335.7 ± 27.7	54.8
34–36	318.2 ± 39.5	46.9	360.3 ± 33.2	53.1
36–38	286.5 ± 35.7	44.5	357.2 ± 30.4	55.5
38–40	276.5 ± 26.3	37.5	461.7 ± 31.8	62.5 *
40–42	284.2 ± 34.2	44.3	357.1± 35.6	55.7
36–37	256.1 ± 30.7	45.9	301.4 ± 33.2	54.1
37–38	286.1 ± 37.3	45.6	341.7 ± 31.5	54.4
38–39	294.1 ± 25.3	40.3	435.3 ± 31.2	59.7 *
39–40	297.3 ± 28.5	46.1	347.1 ± 30.1	53.9
40–41	268.41 ± 33.5	43.9	342.6 ± 29.5	56.1

Each value represents the mean ± SEM of sperm from 3–5 experiments. * The number of sperm was significantly different between low and high temperature of the same temperature gradient (P < 0.05).