1st Record: North Island/New Zealand/Auckland Harbor (1961, Cranfield et al. 1998)
Marsden Point and Whangarei Port, North Island/New Zealand/Whangarei Harbour (Inglis et al. 2006e); North Island/New Zealand/Auckland Harbor (1961, Cranfield et al. 1998); North Island/'Northern NZ harbours' Waikanae River; Tasman Bay, Pelorus Sound (1961, Cranfield et al. 1998); New Zealand/Mahurangi Harbour (1971, Dinamani 1991, cited by Krassoi et al. 2008)
|Magallana gigas is actively fished and cultured in New Zealand (Ruesink et al. 2005).|
|'Following the first observation of M. gigas in Mahurangi Harbour, New Zealand in 1971, the ratio of oyster recruits rapidly changed from 1000 native Saccostrea glomerata to every M. gigas in 1972, to four exotic oyster recruits to every native recruit in 1978' (Dinamani 1991, cited by Krassoi et al. 2008). Magallana gigas has much higher growth rates and fecuundity than the native S. glomerata (Sydney Rock Oyster) (Krassoi et al. 2008).|
ReferencesCranfield, H.J.; Gordon, D.P.; Willan, R.C.; Marshall, B.A; Battershill, C.N.; Francis, M.P.; Nelson, W.A.; Glasby, C.J.; Read, G.B. (1998) Adventive marine species in New Zealand., , New Zealand. Pp.
Inglis, Graeme and 6 authors (2006e) Whangarei Harbour (Whangarei Port and Marsden Point: Baseline survey for non-indigenous species, Biosecurity New Zealand Technical Paper 2005: 1-52
Krassoi; Frederick R.; Brown, Kenneth R.; Bishop, Melanie J.; Kelaher, Brendan P.; Summerhayes, Stephen (2008) Condition-specific competition allows coexistence of competitively superior exotic oysters with native oysters., Journal of Animal Ecology 77: 5-15
Ruesink, Jennifer L. and 6 authors (2005) Introduction of non-native oysters: Ecosystem effects and restoration implications., Annual Review of Ecology and Systematics 36: 643-689