Age and growth of tiger shark (Galeocerdo cuvier) from Western Australia
- Emmons, Sophia M.
- D'Alberto, Brooke M.
- Smart, Jonathan J.
- Simpfendorfer, Colin A.
DOIAbstract
The tiger shark (Galeocerdo cuvier) is believed to be a fast-growing shark that has shown regional variation in growth. Vertebrae samples were taken from 124 tiger sharks (60 females, 38 males, 26 of unknown sex) caught in Western Australia (WA) from 1994 to 1998. Samples were aged using standard vertebral ageing techniques, and the data were used to create length-at-age curves. Dahl-Lee back-calculation was used because of the low number of small juveniles (<140-cm fork length, FL) captured. Males (n = 38) were found to have an age range of 3-21 years and a length range of 145-306 cm FL; females (n = 60) had an age range of 2-31 years and a length range of 118-361 cm FL. A Bayesian multi-model approach to growth-curve fitting was used, and...
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