Assessment of the risk of commercial fisheries to New Zealand seabirds, 2006–07 to 2014–15: Supplementary information

This supplementary information presents a summary of population and distributional data for the 71 taxa included in the risk assessment of the impact of fishing-related mortalities on seabirds breeding in the New Zealand region.

For each seabird taxon included in the risk assessment, the demographic parameters used were the New Zealand population size, the age at first reproduction, and the survival rate. These data are included here with an assigned index of quality (poor, medium, high). For species for which no demographic estimates were available, values from proxy species were used, as indicated with a reference to the data source. Distributional data are presented as maps of the at-sea distribution of each species, with separate maps for the non-breeding and breeding distributions. The distribution of non-breeders was derived from existing maps published by NABIS (National Aquatic Biodiversity Information System) and BirdLife International. A single distribution map was generated when the breeding season extended throughout the year. Included in the distributional maps are data of any incidental captures in commercial trawl, longline and set-net fisheries between the 2006–07 and 2014–15 fishing years, recorded by fisheries observers.

The derived parameters as used in the calculations for the risk assessment are also included. Included with each derived parameter is the density distribution, with the red line indicating the mean, and blue lines indicating the 2.5 and 97.5 percentiles. A detailed description of the methods used to derive the data presented here is provided in the main document.