Title |
Reproduction of the blue‐spotted maskray Neotrygon kuhlii (Myliobatoidei: Dasyatidae) in south‐east Queensland, Australia
|
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Published in |
Journal of Fish Biology, April 2009
|
DOI | 10.1111/j.1095-8649.2009.02202.x |
Pubmed ID | |
Authors |
S. J. Pierce, S. A. Pardo, M. B. Bennett |
Abstract |
This study examined the reproduction and population structure of the blue-spotted maskray Neotrygon kuhlii within Moreton Bay, a subtropical embayment in south-east Queensland, Australia. Mean sizes at maturity were 314 mm disc width (W(D)) in females (n = 140, 115-465 mm W(D)) and 294 mm W(D) in males (n = 123, 129-381 mm W(D)). Female N. kuhlii had a synchronous annual reproductive cycle, with one litter of one to three pups (mean +/-s.d. 1.67 +/- 0.71) produced per year. Mating behaviours were observed in October and November, and ovulation occurred early in the Austral summer, overlapping with the start of embryonic development. Gestation took c. 4 months with parturition occurring in late February and March. Size at birth was 115-170 mm W(D). The population showed a significant female bias, particularly in larger size classes. Tagging studies produced a total recapture rate of 16.1% and indicated that N. kuhlii were site resident for up to 1081 days. |
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