Mana Island, New Zealand
|Māori: Te Mana o Kupe|
Mana Island seen from Porirua.
Location of Mana Island
|Area||2.17 km2 (0.84 sq mi)|
|Length||3 km (1.9 mi)|
Mana Island is the smaller of two islands that lie off the southwest coast of the North Island of New Zealand (the larger is Kapiti Island). The island’s name is an abbreviation of Te Mana o Kupe, "the mana of Kupe".
Mana Island is a 3 km (1.9 mi) long, 2.17 km2 (0.84 sq mi) table, with cliffs along much of its coast and a plateau occupying much of the interior. It lies 3 km (1.9 mi) off the North Island coast in the Tasman Sea, west of the city of Porirua and south of the entrance to Porirua Harbour. In 2009, it was selected by the Global Restoration Network as one of New Zealand's top 25 sites for ecological restoration.
European occupation began 1830s with a whaling station, and bush was cleared for an early sheep farm. A lighthouse was built to the north in 1863, but shipwrecks were caused due to confusion between this light and Pencarrow light at the entrance to Wellington Harbour, and the Mana lighthouse was removed to Cape Egmont in Taranaki in 1877, where it still stands. It became Crown property in 1865 and was subsequently leased to J. F. E. Wright of Wellington.
In 1886 Mariano Vella obtained a sublease of Mana from Wright. He knew little of farming, and arranged that Harry Harris of Pauatahanui would teach him sheep husbandry and farming practice. The Vella family lived in Station Road at Paremata, while Mariano sailed to and from the island on most days. At first he devoted his energy to stocking the island's 536 acres (217 ha) with sheep. The Mana Island lighthouse, built in 1864 and discontinued in 1877, had been shifted to Cape Egmont. Mariano Vella bought one remaining keeper's cottage, dismantled it and rebuilt it close to an existing store shed on the eastern side of the island. In 1887 he built a small woolshed that still stands. At shearing time Mary and the children would come across to live at Mana. The life of the family was shattered when Mary died of a heart attack on 22 December 1889 at the age of 20.
Mariano Vella continued with his development of Mana. Wright had found it difficult to farm there profitably, but Vella, with his native skill in handling boats and his newly acquired experience of farming, was able to manage the island farm very effectively. In 1894 he visited Dalmatia and on 3 September that year married Elizabetta Caterina Tarabochia at Lussinpiccolo on the small island of Lussin (Lošinj) in the Adriatic Sea. The couple returned to New Zealand, and for the last part of their voyage travelled from Sydney to Auckland on the Wairarapa. The ship was wrecked on Great Barrier Island on 29 October 1894 with the loss of 121 lives; Mariano and Elizabetta reached the shore but all their possessions were lost.
The head-lease of Mana expired in December 1893 and when a 14-year lease was auctioned in 1894 Mariano Vella was the successful bidder, as he was again in 1908 and in 1922. He and Elizabetta (known in New Zealand as Elizabeth) raised a family of two girls, Mattea and Antonia (Anne), and two boys, Giovanni (Jack) and Mariano junior. Such was Mariano Vella's success as a farmer that in 1909 he was able to retire. He and Elizabetta returned to her home on Lussin, on a visit that lasted six years. Mattea went with them and attended school there and in Gorizia, Italy, before the family came back to New Zealand in 1915. The family then moved to Plimmerton and lived in a large two-storeyed house close to the sea. Andrew and William, the two eldest sons, both farmed Mana for a time but eventually the management and the lease passed to Andrew who held it until his death in 1951. The lease was transferred from the Vella family to John Gault in 1953.
A suspected outbreak of scrapie (a very contagious and debilitating condition) resulted in all the sheep being slaughtered in the mid 1980s.
The New Zealand Department of Conservation (DoC) now administers the island and has started to restore the forests, with over 500,000 trees being planted so far. In 1989/90 mice were eradicated from the island. Subsequently, a wetland on the island was restored and several threatened bird, lizard and plant species translocated to Mana.
About three DoC staff live on the island, which has its own native plant nursery, electric generator and boat shed. The DoC staff haul their boat out of the water up a ramp with a winch. Some structures on the island provide habitat for native animals; for example, little penguins roost under the old woolshed.
The restoration program has been characterised by a high level of community involvement, led by groups such as the Royal Forest and Bird Protection Society of New Zealand and the Friends of Mana Island. This effort has resulted in it being selected as one of the top ecological restoration projects in Australasia by the Global Ecological Restoration Network.
Seedlings from a 5 km (3.1 mi) radius of the island are brought to the plant nursery where they are raised until ready for planting out. Most planting is done by volunteers on day trips to the island. Although over half a million native plants have been established under this programme, two thirds of island will remain in grass and coastal shrublands. Planting has been mostly in gullies and sheltered parts of the island which experiences strong winds. The strategy has been to plant native shrubs in connecting corridors. This suits most bird life and allows for natural regeneration. The plantings have been mainly of hardy pioneer species best able to withstand the rigorous conditions. When there has been enough shelter established, the forest area will be inter-planted with a variety of less robust species to establish a typical Wellington coastal forest.
The island is a scientific reserve holding many native animals and plants that are rare on the mainland. Notable species on the island include the Cook Strait giant weta, shore plover, North Island robin, takahe, Wellington green gecko, yellow-crowned parakeet, and brown teal. The most recent example is the critically endangered Wellington speargrass weevil from the Wellington South Coast in 2006.
The Department of Conservation and the Friends group are collaborating on a five-year program to establish the threatened shore plover on the island. The birds, of which only about 200 remain in the wild, are sourced from a captive population at the Mount Bruce Wildlife Centre.
Planned projects include the transfer to the island of a wide range of other species, many of which are rare and endangered. Notable amongst these will be the tuatara, the little spotted kiwi, a subspecies of the carnivorous Powelliphanta snail, and a range of threatened plants endemic to the Wellington Region.
One important project is the translocation of the critically endangered Whitaker's skink from the only remaining mainland population at nearby Pukerua Bay. They are being bred in captivity until there are sufficient to form a viable and safe colony on Mana Island. On the mainland they suffer predation from mustelids, rodents and hedgehogs.
Recent projects have included the successful translocations to the island of diving-petrels, fairy prions and fluttering shearwater chicks, with the progeny of several transferees later successfully fledging - the first to do so on Mana Island for many centuries. These species are an important part of the restoration of the island because of their nutrient inflows (free fertiliser) and the habitats their burrows provide for reptiles and invertebrates. The seabird translocation techniques perfected on Mana Island are being used with rare and endangered species elsewhere in New Zealand, such as the Chatham Island taiko, Chatham petrel and Hutton's shearwater.
There have been attempts to start a gannet colony on Mana Island, with conservationists creating a false colony of birds made of concrete, and installing sound systems that make gannet sounds, in the hope that real ones will be attracted to nest there. As of 2008 these attempts have been unsuccessful, although the same combination of techniques is showing good results in a similar project at Young Nicks Head, near Gisborne.
- "History of Mana Island at Department of Conservation". Retrieved 2009-04-29.