BirdLife South Africa has published a study in its new Occasional Report Series that considers the feasibility of eradicating introduced House Mice Mus musculus on South Africa’s sub-Antarctic Marion Island.  Marion’s mice are now known to be attacking ACAP-listed albatrosses and are thus regarded as a serious threat requiring eradication (click here).  The publication follows a site visit last year by New Zealand invasive species expert John Parkes (click here).

Grey-headed Albatross chicks attacked by mice at Marion Island, photograph by Ben Dilley

The study concludes that “eradication of mice from Marion Island is definitely possible with a high chance of success.”  The study makes a number of operational and research & information recommendations that should be addressed prior to an eradication attempt by aerial baiting.

Following the Parkes report BirdLife South Africa has stated “we do … need to do some further research, to answer key questions relating to the logistics of the mission.  How do we avoid or minimize non-target impacts on some of the birds which will be at risk? How much bait will be needed? When is the best time to start the baiting? These questions are being developed into a research plan that we hope to put into action in 2017” (click here).

With thanks to Ross Wanless.

Reference:

Parkes, J. 2014.  Eradication of House Mice Mus musculus from Marion Island: a Review of Feasibility, Constraints and Risks.  In: Wanless, R.M. (Ed.).  BirdLife South Africa Occasional Report Series No. 1.  Johannesburg: BirdLife South Africa.  27 pp

John Cooper, ACAP Information Officer, 27 September 2016

Seven Endangered Newell's Shearwater Puffinus newelli chicks have been flown by helicopter from their montane-nesting areas in the Hawaiian island of Kauai to a coastal site protected by a predator-proof fence at Nihoku within the Kilauea Point National Wildlife Refuge.  They (along with an eighth chick found earlier) are being raised by hand feeding to fledge from the same site where 10 Vulnerable Hawaiian Petrels Pterodroma sandwichensis chicks were successfully translocated last year in the hopes of starting new protected colonies of both species (click here).

Newell's Shearwater, photograph by Eric Vanderwerf

Translocated Newell's Shearwaters, photographs by Andre Raine

“The translocation, which involved two separate teams and more than a dozen people, took place in Kauai's rugged mountain interior and along the coast.  In the early morning, a team was dropped by helicopter onto a mountain peak located in the Upper Limahuli Preserve... The team members headed out to seven different nest burrows that had been monitored throughout the breeding season.  Seven large, healthy chicks were carefully removed from their burrows by hand, placed into pet carriers, and carried up the side of the mountain to a waiting helicopter.  The chicks were flown to the Princeville airport, then driven to the refuge and their new home within the predator-proof fence.  An eighth chick was found several weeks earlier in the Hono O Na Pali Natural Area Reserve … where it had left its burrow and become lost” (click here for the full news release).

Photos and videos of the translocation can be found here.

Read more here.

Latest News from Pacific Rim Conservation:

"Day six and the translocated Newell's Shearwater chicks at Kilauea Point National Wildlife Refuge are doing well and have settled into their new homes. They have also started to lose their fuzz which is being replaced with new feathers to help them fly out to sea. That mohawk won't be around for too much longer!"

John Cooper, ACAP Information Officer, 26 September 2016

Ross Wanless (BirdLife South Africa) and Wiesława Misiak (ACAP Secretariat) presented a document (WPEB12-28) at the 12th Meeting of the Working Party on Ecosystems and Bycatch (WPEB12) of the Indian Ocean Tuna Commission (IOTC) held in Victoria, Mahé, Seychelles last week.  The meeting document gave an update to the status of seabirds, including ACAP-listed albatrosses and petrels, within the IOTC area.

Amsterdam Albatross, photograph by Scott Shaffer

The document’s abstract follows:

“New data on the status of albatrosses and petrels, the seabird most at risk from bycatch in tuna longline fisheries, are presented.  On the whole, downward population trends continue, giving cause for serious concerns and highlighting the need to continue and increase efforts from longline fleets to prevent seabird bycatch.  New information on Tristan Albatross Diomedea dabbenena highlights the Indian Ocean as an important part of this Critically Endangered albatross’s foraging range.  Several species, notably Amsterdam Albatross D. amsterdamensis and Black-browed Albatross Thalassarche melanophris have undergone strong recoveries in recent years, possibly reflecting improved use of seabird bycatch mitigation measures.”

ACAP was represented at the meeting by Anton Wolfaardt, Convenor of ACAP’s Seabird Bycatch Working Group (click here).

Click here to access other seabird papers presented at the Seychelles meeting.

Reference:

Wanless, R.M. & Misiak, W. 2016.  A status update of seabirds in the IOTC area.  IOTC-2016-WPEB12-28.  7 pp.

John Cooper, ACAP Information Officer, 23 September 2016

Elizabeth Kain (Kauai Endangered Seabird Recovery Project, Hawaii, USA) and colleagues have published in the journal Environmental Science and Pollution on increasing plastic pollutant levels in two Hawaiian shearwaters.

The paper’s abstract follows:

“The ingestion of plastic by seabirds has been used as an indicator of pollution in the marine environment.  On Kaua‘i, HI, USA, 50.0 % of Newell’s (Puffinus newelli) and 76.9 % of wedge-tailed shearwater (Ardenna pacifica) fledglings necropsied during 2007–2014 contained plastic items in their digestive tract, while 42.1 % of adult wedge-tailed shearwaters had ingested plastic.  For both species, the frequency of plastic ingestion has increased since the 1980s with some evidence that the mass and the number of items ingested per bird have also increased.  The color of plastic ingested by the shearwaters was assessed relative to beach-washed plastics by using Jaccard’s index (where J = 1 complete similarity).  The color (J = 0.65–0.68) of items ingested by both species, and the type ingested by wedge-tailed shearwaters (J = 0.85–0.87), overlapped with plastic available in the local environment indicating moderate selection for plastic color and type.  This study has shown that the Hawaiian populations of shearwaters, like many seabird species, provide useful but worrying insights into plastic pollution and the health of our oceans.”

Newell's Shearwater, photograph by Eric Vanderwerf

Reference:

Kain, E.C., Lavers, J.L., Berg, C.J., Raine, A.F. & Bond, A.L. 2016.  Plastic ingestion by Newell’s (Puffinus newelli) and wedge-tailed shearwaters (Ardenna pacifica) in Hawaii.  Environmental Science and Pollution Research  doi: 10.1007/s11356-016-7613-1.

John Cooper, ACAP Information Officer, 22 September 2016