White-chinned Petrel on Disappointment Island, Auckland Islands, photograph by Kalinka Rexer-Huber

Kalinka Rexer-Huber (Parker Conservation, Dunedin, New Zealand) and colleagues have published in the journal Notornis on the breeding numbers of White-chinned Petrels Procellaria aequinoctialis on the Auckland Islands.

The paper’s abstract follows:

“In New Zealand’s subantarctic Auckland Islands, the island-wide population size of white-chinned petrels (Procellaria aequinoctialis) is unknown.  On ten islands in the group, surveys for burrow distribution were followed by whole-island burrow counts or stratified random sampling of white-chinned petrel habitat.  White-chinned petrel burrow density, burrow occupancy, and slope-corrected surface areas were used to calculate the breeding population size.  Burrows were patchily distributed and most abundant in dense megaherb communities.  White-chinned petrel burrow density at Adams Island was 701 burrows/ha (95% CI: 480–803 burrows/ha). Burrow occupancy was 0.59 ± 0.02 (mean ± se) at the start of incubation.  An estimated 28,300 (10,400–44,800) white-chinned petrel pairs breed on Adams Island. Including the small colonies on Ewing, Monumental, and Enderby Islands (together c. 100 pairs) and the estimated 155,500 breeding pairs on Disappointment Island, the Auckland Island group has an estimated 184,000 (95% CI: 136,000–237,000) pairs of breeding white-chinned petrels”.

With thanks to Kalinka Rexer-Huber.

This publication forms part of a compilation of 19 papers appearing in a special issue of the journal Notornis of Birds New Zealand that covers many aspects of the avifauna of the Auckland Islands. The special issue is also being made available as a 436-page book with the title Lost Gold: Ornithology of the subantarctic Auckland Islands.  Edited by Colin Miskelly and Craig Symes, it can be ordered for purchase (click here).  An interview with the two editors gives information about their work with the book.  Click here to access abstracts for all 19 papers.

Reference:

Rexer-Huber, K., Thompson, D.R. & Parker, G.C. 2020.  White-chinned petrel (Procellaria aequinoctialis) burrow density, occupancy, and population size at the Auckland Islands.  Notornis 67: 387-401.

John Cooper, ACAP Information Officer, 09 April 2020

"All for One, One for All - ALBATROSS", by ABUN founder, Kitty Harvill

Seven World Albatross Day 2020 posters designed from ACAP's collaboration with Artists & Biologists Unite for Nature (ABUN) over January and February 2020 are now available for downloading from this website’s ‘World Albatross Day” section accessible from the home page.  Alternatively go directly to the images to obtain free high-resolution versions suitable for printing at A3 size here.

More WAD2020 and related posters by Owen Davey, Michelle Risi and Jamie Watts  (some of which are downloadable at high resolution) can be viewed from here.

Please note all the downloadable electronic poster images are only made available for personal display or for use when engaging in activities that will aid in drawing attention to the conservation crisis faced by the world’s albatrosses.  They may not be used for personal or commercial financial gain.  ACAP is not able to contribute to the costs of printing the posters other than by supplying the images by electronic means.

Read more about the ABUN collaboration here, which included the creation of a nine-and-a-half-minute music video.

Grey-headed Albatross on Marion Island, photograph and poster design by Michelle Risi

With grateful thanks to ABUN artists Kitty Harvill, Mary Ingrum, Jan Phethean, Di Roberts, Maureen Rousseau and Anne Shoemaker, and to Owen Davey, Michelle Risi, Graham Robertson and Jamie Watts for use of their poster images.  Ruth Cooper kindly designed the ABUN posters for ACAP.

John Cooper, ACAP Information Officer, 08 April 2020

A breeding pair of Gibson's Antipodean Albatrosses on Adams Island, photograph by Colin O'Donnell

Barry Baker (Institute of Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia) and colleagues have published in the journal Notornis on using helicopter-based photography to count breeding great albatrosses Diomedea spp.

The paper’s abstract follows:

“Two approaches to estimating the population size of great albatrosses (Diomedea spp.) were tested in the Auckland Islands, New Zealand.  The first approach used a series of aerial photographs taken on Adams Island to produce high-resolution photo-mosaics suitable for counting nesting Gibson’s wandering albatross (Diomedea antipodensis gibsoni).  The second involved a direct count from a helicopter of southern royal albatross (D. epomophora) breeding on Enderby Island.  Both techniques produced results that closely matched counts of albatrosses attending nests derived from ground counts, although aerial counts could not determine whether birds were sitting on eggs or empty nests.  If estimates of breeding pairs are required, aerial counts of nests require a correction factor to adjust for birds that are apparently nesting but have not laid.  Such correction factors are best based on ground counts undertaken simultaneously with the aerial counts.  Used in conjunction with correction factors, the two techniques provide a method of estimating the population size of great albatrosses breeding in remote areas where it may be logistically difficult to undertake ground counts of the whole population.”

This publication forms part of a compilation of 19 papers appearing in a special issue of the journal Notornis of Birds New Zealand that covers many aspects of the avifauna of the Auckland Islands. The special issue is also being made available as a 436-page book with the title Lost Gold: Ornithology of the subantarctic Auckland Islands.  Edited by Colin Miskelly and Craig Symes, it can be ordered for purchase (click here).  An interview with the two editors gives information about their work with the book. Click here to access abstracts for all 19 papers.

Southern Royal Albatross, artwork by  Mew Hunt‎ from a photograph by Graham Parker

With thanks to Barry Baker and Colin Miskelly.

Reference:

Baker, G.B., Elliott, G.P., French, R.K., Jensz, K., Muller, C.G. & Walker, K.J. 2020.  Development of aerial monitoring techniques to estimate population size of great albatrosses (Diomedea spp.).  Notornis 67: 321-331.

John Cooper. ACAP Information Officer, 07 April 2020

A 'WAD2020' banner on The Snares with Buller's Albatrosses.  From left: David Thompson, Paul Sagar and David Sagar (in front)

The now well-travelled World Albatross Day banner made by Graham Parker and Kalinka Rexer-Huber of the environmental consultancy Parker Conservation made it to New Zealand’s sub-Antarctic Snares Islands last month.

Following the banner’s return with Graham and Kalinka from its successful outing to the Auckland Islands, David Sagar (DOC), Paul Sagar (NIWA) and David Thompson (NIWA) displayed it at one of the long-established study colonies of globally Near Threatened and nationally Naturally Uncommon Southern Buller's Albatrosses Thalassarche b. bulleri on North East Island in the Snares group.

‘WAD2020’ banners have now been displayed on most of New Zealand’s sub-Antarctic islands, as well as on Three Kings Islands situated north of New Zealand where the Northern Buller’s Albatross T. b. platei has a small breeding population (and where the same banner made a quick visit in February).

Paul Sagar writes to ACAP Latest News: “In addition to displaying the banner, a highlight of the trip was finding a 48-year old Southern Buller's Albatross that had been banded as a chick in 1972 by Don Horning.  The bird was occupying an empty nest, the same one that it has occupied for the last 25 or so years that I have been recapturing it.  It was last on an egg in March 2019.  The bird was originally banded on a nest in the same area where it now itself breeds.  Measurements of it that I took in the 1990s indicate that it is a female.”

An even older Southern Buller’s recaptured by Paul on The Snares back in 1993 was estimated as 57 years old (click here).

Buller's Albatross, artwork for Artists & Biologists Unite for Nature by Shary Page Weckwerth from a photograph by Paul Sagar

Paul has also offered his personal support for WAD2020: “Albatrosses nest on some of the most remote islands of the world and travel the High Seas far from land.  Yet they still suffer from the effects of a range of human activities that threaten their existence.  A World Albatross Day is an excellent way to raise awareness of the plight of these iconic seabirds.” .

With thanks to Shary Page Weckwerth (ABUN wildlife artist), Graham Parker (Parker Conservation) and Paul Sagar ( retired, Marine Ecology Group, National Institute of Water and Atmospheric Research; NIWA).

John Cooper, ACAP Information Officer, 06 April 2020