Table 4.

Pairwise comparisons of reproductive parameters for different categories of males

Response variable		CHBU-CHHN	F1-CHHN	BC.23-CHHN	BC.24-CHHN	BC.23-F1
Number of sperm in cauda epididymis (103)	Estimate	−2549.9	na*	na*	−456.8	na*
	SE	1666.1	na*	na*	1626.5	na*
	df	26.6	na*	na*	27.4	na*
	t	−1.42	na*	na*	−0.27	na*
	p-value	0.29	na*	na*	0.94	na*
Testis mass in mg	Estimate	−4.89	−57.09	−63.64	0.26	−6.55
	SE	3.03	2.60	5.36	3.16	5.26
	df	71.4	67.1	100.7	68.3	101.0
	t	−1.61	−21.92	−11.87	0.08	−1.24
	p-value	0.32	< 10−4	< 10−4	1.00	0.53
Epididymis mass in mg	Estimate	−1.49	−11.21	−11.21	0.98	0.00
	SE	1.09	0.94	1.88	1.13	1.85
	df	68.8	62.8	99.5	64.6	99.9
	t	−1.36	−11.97	−5.96	0.86	0.00
	p-value	0.46	< 10−4	< 10−4	0.77	1.00
Mass of seminal vesicle with coagulating gland in mg	Estimate	−14.11	−7.01	4.92	2.11	11.93
	SE	5.64	4.85	9.88	5.88	9.70
	df	69.4	64.9	100.4	66.4	100.8
	t	−2.50	−1.45	0.50	0.36	1.23
	p-value	0.05	0.41	0.93	0.97	0.54
Preputial gland mass in mg	Estimate	−1.07	10.99	−8.52	6.00	−19.51
	SE	6.50	5.52	12.57	6.69	12.35
	df	70.5	66.8	101.9	65.7	101.8
	t	−0.16	1.99	−0.68	0.90	−1.58
	p-value	1.00	0.16	0.86	0.75	0.33

Pairwise comparisons of least square means of male categories using Dunnett’s method for p value adjustment were applied to the LMMs with male category and male body mass as explanatory variables, and the ID of the males’ parents as a random effect. Estimate and standard error of sperm number were transformed back before insertion into the table. *For number of sperm, only fertile male categories were included in the model (see text)