TABLE 58-9.

Reproductive Parameters in Selected Species of Pigs and Peccaries7, 14, 21, 32, 35, 49

Parameter	Red River Hog (Potamochoerus Porcus)	Babirusa (Babyrousa Babyrussa)	Bearded Pig (Sus Barbatus)	Common Warthog (Phacochoerus Africanus)	Collared Peccary (Tayassu Tajacu)	Chacoan Peccary (Catagonus Wagneri)
Karyotype (2n)	34	38	36–40	34	30	20
Age at sexual maturity	3 years	In captivity as early as 5–10 months	10–20 months	18–20 months	8–10 months	1–2 years
Details of estrous cycle	Seasonal?	Polyestrous, may have two litters per year; urinary hormones. 28–42 day estrous cycle	Breed through year, two litters per year	Seasonal polyestrous; estrus lasts 72 hours approximately every 6 weeks	Polyestrous; 27–28 day estrous cycle; 1- to 5-day estrus (5.7 day mean)	Breed through year
Gestation	127 days	155–175 days (163 day mean)	160 days	160–170 days	140–150 days (142 day mean)	∼150 days
Litter size	1–8 (usually 3–4)	1–3 (usually 2)	8–10	1–8 (usually 2–3)	1–3 (usually 2)	1–4 (usually 2)
Number of mammae	3 pairs	2 pairs	6 pairs	2 pairs	2 pairs	4 pairs
Weaning	—	26–32 weeks	5–6 weeks	24–25 weeks	6 weeks	—

Data modified from Morris and Shima.²⁸