The age of sexual maturity is quite variable within sexes. Males reach sexual maturity between the ages of 7 and 15, and females become sexually mature between 5 and 13 years of age. The mating season of the striped dolphin is in the winter and early summer in the western north Pacific, while it occurs in the fall in the Mediterranean (Archer and Perrin, 1999). The gestation period of striped dolphins lasts 12-13 months. Females typically have a four year calving interval, having a resting period of approximately 2-6 months between lactation and the next mating (Calzada et al., 1996).
Breeding interval: Females typically have a four year calving interval
Breeding season: The mating season of the striped dolphin is in the winter and early summer in the western north Pacific, while it occurs in the fall in the Mediterranean
Average number of offspring: 1.
Range gestation period: 12 to 13 months.
Range weaning age: 16 (high) months.
Average weaning age: 16 months.
Range age at sexual or reproductive maturity (female): 5 to 13 years.
Range age at sexual or reproductive maturity (male): 7 to 15 years.
Key Reproductive Features: iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); viviparous
Average birth mass: 10000 g.
Average number of offspring: 1.5.
Fetuses grow at an approximate rate of 0.29cm/day. At birth, striped dolphins are 90-100cm long (differing slightly between ranges) and weigh approximately 11.3kg (Calzada, Aguilar, Sorensen, and Lockyer, 1996). Young calves then nurse for almost 16 months. (Archer and Perrin, 1999; Calzada et. al., 1996).
Parental Investment: pre-fertilization (Provisioning, Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Female); pre-weaning/fledging (Provisioning: Female, Protecting: Female)
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