Fertilization in all sharks is internal, taking place in the egg tubes or oviducts of the female. Male sharks must grab females, maneuver their bodies so that he can introduce his claspers to pass sperm into the vent. Males and females come together only to mate.
Mating System: polygynandrous (promiscuous)
Reproduction in these sharks is not well understood. Chlamydoselachus africana is an ovoviviparous shark that can bear anywhere from two to twelve live young (Dulvy & Reynolds, 1997). Young tend to be 40 cm long. Females apparently reproduce all year long and have a gestation period of about one to two years (Compagno, 1984). The size of an immature male is about 730 mm, whereas a mature male is about 970 mm long. Thus, the length of a mature male is anywhere from 730 mm to 970 mm (Nakaya & Bass). Female frilled shark length at maturity is about 1350 mm (Nakaya & Bass).
Breeding season: These sharks have the ability to breed all year.
Range number of offspring: 2 to 12.
Range gestation period: 12 to 24 months.
Key Reproductive Features: iteroparous ; year-round breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; fertilization (Internal ); ovoviviparous
There is little, if any, information on parental investment in frilled sharks. Sharks in general do not care for their young after their birth (Parker and Parker, 1999).
Parental Investment: no parental involvement; pre-fertilization (Provisioning, Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Female)
- Compagno, L. 1984. Sharks of the World. FAO Species Catalogue, 4 (1): 14-15.
Dulvy, N., J. Reynolds. 1997.
Evolutionary transitions among egg-laying, live-bearing and maternal inputs in sharks and rays.. Proc. R. Soc. Lond. B, 264: 1309-1315.. Accessed September 24, 2005 at http://www.fishbase.org/Summary/SpeciesSummary.php?id=635.
- Parker, J., S. Parker. 1999. The Encyclopedia of Sharks. Canada & United States: Firefly Books Ltd..
- Tricas, T., K. Deacon, P. Last, J. McCosker, T. Walker, L. Taylor. 2002. The Nature Companions Sharks and Whales. 814 Montgomery Street, San Francisco CA, 94133 USA: Fog City Press.