The Noises have long been a place of research and conservation. Some of the current projects include:
On the main beach of Ōtata Island is a large, historic midden. Sadly, meters of the midden were lost in a large storm in January 2018. The midden provides archeological evidence which can sit alongside the oral histories of mana whenua and the Neureuter family.
Auckland Museum Archaeologists Dr Louise Furey and Emma Ash are working in collaboration with mana whenua, Ngāi Tai ki Tāmaki, and the Neureuter family to undertake an excavation of the midden on Ōtata during the summer of 2020.
This will provide a window into the past about how people lived, what resources were used, confirm timeframes of occupation and indicate the historical, environmental state of the Hauraki Gulf.
This partnership between the Auckland Museum and mana whenua will be a new bicultural approach for how archaeologists and iwi interact with the common goal of gathering information from eroding archaeological sites in the Hauraki Gulf as an active response to coastal erosion.
Inspecting the midden, January 2020. Photo: Katina Conomos.
Spotted shag colony
The Hauraki Gulf is home to a threatened population of spotted shags or parekareka, a bird that is genetically distinct from all other shags in New Zealand. And while the spotted shag is relatively common in other parts of the country, in the Hauraki Gulf the birds are now limited to just two colonies, one on pest-free Tarahiki Island and a promontory on Waiheke Island which is also troubled by rats. And last time a bird survey was conducted by Dr Matt Rayner and Dr Tim Lovegrove, they estimated the population was sitting at around 300 breeding pairs.
In an attempt to attract the endearingly elegant spotted shag back to The Noises where the birds once bred, in February 2019 Auckland Museum and Auckland Council, in partnership with the Neureuter Family, created and installed a replica colony of spotted shags on a steep cliff face on the north eastern side of Ōtata Island.
The replicas were based on six spotted shag specimens that were found in the Auckland Museum’s collection and collected by Museum staff from The Noises back in 1913. The Museum’s specimens were scanned, 3D printed and painted. The result, while static, is surprisingly life-like.
As well as the replica birds, nests have been constructed from dried seaweed and white paint has been artfully splashed, in an effort to mimic the appearance of droppings that mark seabird colonies. A solar-powered sound system has been installed and it plays spotted shag breeding calls to further attract birds to the site.
For quite some time it looked as if the clever creatures weren’t going to be fooled by the sham shags but, in recent news, a group of inquisitive birds were spotted stopping by the site last Easter. Whether they were scouting the area for future family planning, or just stopping off on their way from A to B, or on feeding missions, the sighting of an estimated 19 birds is encouraging.
And one thing you can be sure of, eyes will be peeled over the coming months to see if any of the birds have returned to nest, with laying seasons in the Gulf focused around August. December and March.
Damian Christie from the Aotearoa Science Agency was on hand to film the installation.
You can also watch Auckland Biodiversity ecologist Tim Lovegrove and Auckland Museum’s Matt Rayner take part in an annual survey to monitor the threatened populations of Spotted Shags in the Hauraki Gulf.
Geckos and wetapunga
Many of the shallow rocky reefs around The Noises are overrun with kina (the sea urchin Evechinus chloroticus). This is a direct result of decades of intense fishing pressure on snapper and crayfish, which are the main predators of kina. In the absence of predators, kina proliferate and graze down the kelp forests forming “kina barrens”. The kina within the barrens are typically small and of little value as kaimoana. As part of a collaborative project with iwi, University of Auckland researchers are mapping the extent of kina barrens in the Hauraki Gulf, including around The Noises, and developing methods to restore kelp forests in areas that are currently kina barrens.
Kina barrens in shallow water (~3 m) on the northern side of Otata. Note the absence of seaweeds and encrusting life on the reef. Photo: Nick Shears.
The impacts of boat noise
Many marine animals rely on making sound and listening for sound cues as a matter of survival. The University of Auckland have placed a camera on Ōtata Island and a hydrophone in the bay to gather data to determine the impact recreational boat noise is having on the reef systems around The Noises. It’s worth noting the camera could also provide visual information confirming recreational fishing pressure being exerted around Ōtata Island. This study commenced in 2019 and will run through to 2021.
Photograph from the camera on Ōtata Island.