Little information about the mating systems of Indo-Pacific humpbacked dolphins is documented. However, the most likely reroductive strategy of males is mate searching.
Indo-Pacific humpback dolphins breed once yearly, though births typically occur in the spring and summer. After a gestation period of 10 to 12 months, females usually give birth to 1 offspring that measures approximately 100 cm in length. Young are weaned around 2 years of age, although they are capable of eating solid foods after 6 months. Females reach sexual maturity around 9 to 10 years of age, while males reach sexual maturity around 12 to 13 years of age.
Breeding interval: Indo-Pacific Humpback Dolphins breed once yearly.
Average number of offspring: 1.
Range gestation period: 10 to 12 months.
Range weaning age: 24 to 36 months.
Average weaning age: 24 months.
Range age at sexual or reproductive maturity (female): 9 to 10 years.
Range age at sexual or reproductive maturity (male): 12 to 13 years.
Key Reproductive Features: gonochoric/gonochoristic/dioecious (sexes separate); viviparous
Female Indo-Pacific humpback dolphins provide considerable care to their young. Calves are weaned around 2 years of age and remain in association with their mother for 3 to 4 years. Allomothering, or non-maternal infant care, has been observed off the coasts of South Africa and Hong Kong.
Parental Investment: female parental care ; pre-hatching/birth (Provisioning: Female, Protecting: Female); pre-weaning/fledging (Provisioning: Female, Protecting: Female); pre-independence (Protecting: Female)
- Folkens, P., R. Reeves. 2002. Guide to Marine Mammals of the World.. New York, New York: Alfred A. Knopf, Inc.
- Jefferson, T. 2000. Wildlife Monographs. Population Biology of the Indo-Pacific Hump-Backed Dolphin in Hong Kong Waters, 144: 1-65.
- Shirihai, H., B. Jarrett, G. Kirwan. 2006. Whales, dolphins, and other marine mammals of the world. Princeton, N.J: Princeton University Press.
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