Published:  

July 2013
This report describes the results of continued ground survey population monitoring of New Zealand sea lions at the Auckland Islands, undertaken in early 2013.

This report describes the results of continued ground survey population monitoring of New Zealand sea lions at the Auckland Islands, undertaken in early 2013.

Summary

The field component of the work was undertaken in the Auckland Islands between 8–31 of January 2013.

New Zealand sea lions, Enderby Island
New Zealand sea lions, Enderby Island

Pup production was estimated for New Zealand sea lion colonies at Sandy Bay (n=374), Dundas Island (n=1,491), Figure of Eight Island (n=75) and South East Point (n=0) with total pup production for the Auckland Islands in 2013 estimated as 1,940 – a 15.2% increase on the estimate from 2012.

Seven hundred and eighty two pups were double flipper tagged at Sandy Bay (n=347), Dundas Island (n=400), Figure of Eight Island (n=33), South East Point (n=0) and elsewhere on Enderby Island (n=2 ).

Over 2,262 tag, brand and micro-chip resightings of individual sea lions were made. All of these resightings are still being verified and validated and, once that is completed, the exact number of resightings and the data itself will be available.

The New Zealand sea lion database was used for the first time, and all of the tagging and resighting data has been entered into it.

It was a very successful trip despite being considerably shorter than previous trips and having fewer personnel. The main difference in outputs being that 67% fewer resightings of individual sea lions were recorded and these were only made in January.

Publication information

This report was commissioned by the Department of Conservation, Project POP2012-01

By Childerhouse SJ, Amey J, Hamer D, McCrone A

Contact

Conservation Services Programme
Marine Species & Threats
Department of Conservation
PO Box 10 420
Wellington
Email: csp@doc.govt.nz


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