Glenfern Sanctuary is a predator-controlled area on Great Barrier Island in the Hauraki Gulf Marine Park of New Zealand.

A 2.1-km Xcluder® fence built across the Kotuku Peninsula on inhabited Great Barrier in 2009 by the Glenfern Sanctuary Charitable Trust helps protect Vulnerable and ACAP-listed Black Petrels Procellaria parkinsoni and other burrowing seabirds within the 250-ha sanctuary against feral domestic cats Felis catus, feral pigs Sus scrofa domesticus, Pacific Rats or Kiore Rattus exulans and Norway or Brown Rats R. norvegicus.  Monitoring of over 1000 bait stations and tracking tunnels helps prevent reinvasions of pests becoming established.

Black Petrels, photograph by Biz Bell

In June this year a major storm caused extensive damage to the natural environment on Great Barrier with landslips, fallen trees and foot bridges and parts of the walkways in the sanctuary washed away – as described in the sanctuary’s on-line newsletter (click here).

The winter 2014 newsletter also reports on the last summer’s breeding:

“Seasonal monitoring of blacks and Cooks [Pterodroma cookii] petrels is proving very promising with three areas with both Blacks and Cooks within the Sanctuary and confirmation of fluttering shearwaters [Puffinus gavia] located near the cliffs at the western boundary of the Peninsula. In total, 22 Cooks and 16 black petrel burrows were identified this season, including 17 new burrow locations.  A total of nine Cooks and six black petrels were considered to have fledged successfully based on our monitoring – and thankfully all before the big storm hit.”

A Black Petrel Action Group was established in 2011.

Watch a short video on Black Petrel conservation here.

John Cooper, ACAP Information Officer, 22 August 2014

The NGO Oikonos - Ecosystem Knowledge has produced an on-line teaching package to inform young students of the threats albatrosses face (click here).  The package is made up of five lessons entitled Introduction to Seabirds; Tracking Albatross Migrations; Protecting Ocean Hotspots; Bolus Analysis; and Campus Debris Survey.

Black-footed Albatross, photograph by Lindsay Young

Each lesson includes:

Lesson plan with learning objectives and procedures; an outline of necessary materials and preparation; time estimates; suggested discussion questions and possible answers; ideas for differentiating activities for diverse learners; expanded resources, videos and links; student worksheets and handouts for photocopying and/or projecting; presentations with photos, art, wildlife research data; and teacher presentation notes to support the lesson.

The activity package was produced by Oikonos - Ecosystem Knowledge and Meghan Marerro in collaboration with the Cordell Bank National Marine Sanctuary and the Papahānaumokuākea Marine National Monument.

Click here to download the activity package.

John Cooper, ACAP Information Officer, 21 August 2014

Anthony Rendall (Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Melbourne Australia) and colleagues have published in the open-access journal PloS One on the use of camera traps to detect activity by rodents among breeding Short-tailed Shearwaters Puffinus tenuirostris on Phillip Island, Australia

The paper’s abstract follows:

“Invasive rodent species have established on 80% of the world’s islands causing significant damage to island environments.  Insular ecosystems support proportionally more biodiversity than comparative mainland areas, highlighting them as critical for global biodiversity conservation.  Few techniques currently exist to adequately detect, with high confidence, species that are trap-adverse such as the black rat, Rattus rattus, in high conservation priority areas where multiple non-target species persist.  This study investigates the effectiveness of camera trapping for monitoring invasive rodents in high conservation areas, and the influence of habitat features and density of colonial-nesting seabirds on rodent relative activity levels to provide insights into their potential impacts.  A total of 276 camera sites were [sic] established and left in situ for 8 days.  Identified species were recorded in discrete 15 min intervals, referred to as ‘events’.  In total, 19 804 events were recorded.  From these, 31 species were identified comprising 25 native species and six introduced.  Two introduced rodent species were detected: the black rat (90% of sites), and house mouse Mus musculus (56% of sites).  Rodent activity of both black rats and house mice were positively associated with the structural density of habitats.  Density of seabird burrows was not strongly associated with relative activity levels of rodents, yet rodents were still present in these areas.  Camera trapping enabled a large number of rodents to be detected with confidence in site-specific absences and high resolution to quantify relative activity levels.  This method enables detection of multiple species simultaneously with low impact (for both target and non-target individuals); an ideal strategy for monitoring trap-adverse invasive rodents in high conservation areas.”

Short-tailed Shearwater, photograph by Mark Carey

Reference:

Rendall, A.R., Sutherland, D.R., Cooke, R. & White, J. 2014.  Camera trapping: a contemporary approach to monitoring invasive rodents in high conservation priority ecosystems.  PloS One doi:10.1371/journal.pone.0086592.

John Cooper, ACAP Information Officer, 20 August 2014

Frances Zewe (Ecosystem Management, School of Environmental and Rural Sciences, University of New England, Armidale, Australia) and colleagues have published in the journal Australian Mammalogy on trapping alien Black Rats Rattus rattus but not native Swamp Rats R. lutreolus on a Wedge-tailed Shearwater Puffinus pacificus island.

The paper’s abstract follows:

“Novel bait stations can be used as a targeted method of delivering bait by exploiting behavioural traits of the target species.  On Muttonbird Island, New South Wales, the black rat (R. rattus) has been baited to aid the conservation of the island’s wedge-tailed shearwater (Ardenna pacifica) colony, which may result in poisoning of the sympatric swamp rat (Rattus lutreolus).  We aimed to design a bait station that R. rattus could reach, but that R. lutreolus could not.  We found that 11 (92%) of 12 captive R. rattus reached the bait chambers by climbing a 50-cm vertical pipe, whereas only four (18%) of 22 R. lutreolus reached these bait stations.  In a field trial on Muttonbird Island R. rattus entered the bait chamber on an average of 5.3 events per night of vertical bait station deployment, but R. lutreolus did not enter the stations.  In a field trial on the mainland at a site with a high density of R. lutreolus, this species was detected in one vertical bait station five times, equating to an average of 0.017 events per night of vertical bait station deployment.  We conclude that R. rattus readily climbs a 50-cm pipe to enter the bait station, whereas R. lutreolus rarely or never does on Muttonbird Island or at the mainland site.”

Wedge-tailed Shearwater, photograph by Alan Burger

Reference:

Zewe, F., Meek, P., Ford, H. & Vernes, K. 2014.  A vertical bait station for black rats (Rattus rattus) that reduces bait take by a sympatric native rodent.  Australian Mammalogy 36: 67-73.

John Cooper, ACAP Information Officer , 19 August 2014