Demographic Analysis

From Cortés et al (2015):

Demographic analyses, such as life tables and matrix population models, are commonly used in risk assessment of chondrichthyan species (e.g. NIWA 2016). These methods provide a quantitative estimate of the population intrinsic, or maximum, rate of increase (rmax) and other associated population metrics, such as generation time and net reproductive rate. They can be used to assess the level of fishing mortality (Fcrash) that a stock can sustain before the population growth rate becomes negative and in theory leads to extinction. A notable shortcoming of demographic methods is that they do not provide information on stock status.


  1. Cortés E, Brooks EN, Shertzer KW (2015) Risk assessment of cartilaginous fish populations. ICES J Mar Sci 72:1057–1068. doi: 10.1093/icesjms/fsu157
  2. NIWA (2016) Pacific-wide sustainability risk assessment of bigeye thresher shark (Alopias superciliosus) - Prepared for the WCPFC. Wellington New Zealand