On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

Age composition of female Antarctic toothfish

NIWA

Age composition of female Antarctic toothfish from the core areas (A,B,C) of the Ross Sea shelf survey, 2012-2015. The graphs show age class progression through the 4 years available. Note: the vertical line in each graph is at the 7 year mark.