South Taranaki Bight

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South Taranaki Bight
Taranaki coast near Patea - Flickr - PhillipC.jpg
Taranaki coast near Patea
NZ-S Taranaki B.png
Location of South Taranaki Bight
Location North Island
Coordinates 39°40′S174°10′E / 39.667°S 174.167°E / -39.667; 174.167
Type Bay
Part of Tasman Sea
Basin  countries New Zealand

The South Taranaki Bight is a large bay on the west coast of New Zealand, south of Taranaki, west of the Manawatu, north and west of the western entrance of Cook Strait [1] and north of the South Island. [2] The name is sometimes used for a much smaller bay in South Taranaki, between the mouth of the Kaupokonui Stream directly south of Mount Taranaki and the mouth of the Pātea River. [3]

Approximately 18,000 years ago during the Last Glacial Maximum when sea levels were over 100 metres lower than present day levels, the South Taranaki Bight was a coastal plain which connected the North and South Islands, featuring rivers which drained into the Cook Strait (then a harbour) to the south-east. Sea levels began to rise 7,000 years ago, eventually separating the islands and connecting the Cook Strait to the Tasman Sea. [4]

The bight was once a calving ground for southern right whales in winter and spring and early Europeans in New Zealand called it Mothering Bay after the large number of cow-calf pairs. However right whale numbers were greatly reduced by whaling and only a handful of cows visit regularly today. [5] [6] Pygmy blue whales were discovered off Cape Egmont in 2007 and the South Taranaki Bight was confirmed in 2014 as the only known feeding and foraging ground for blue whales in New Zealand, hosting a unique population of its own. [7] [8] Blue whales also frequent an area off Kahurangi Point in the nearby northern South Island. [2]

A seabed survey by the National Institute of Water and Atmospheric Research in 2023 found that the bight contained 14 rocky reefs with abundant life including "kelp forests, macroalgal meadows, and gardens of 39 species of sponge. Blue cod (including nurseries at four sites), scarlet wrasse, butterfly perch, leatherjackets and tarakihi dominated the fish species, also including snapper, trevally, kingfish, and kahawai". [9]

Australian-owned mining company Trans-Tasman Resources has proposed to mine iron sand from the bight. [9]

See also

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References

  1. ↑ Grant-Taylor, Thomas Ludovic (1966). "South Taranaki Bight". In McLintock, A.H. (ed.). An Encyclopaedia of New Zealand . Retrieved 31 October 2020– via Te Ara – the Encyclopedia of New Zealand.
  2. 1 2 Torres, Leigh G. (2013). "Evidence for an unrecognised blue whale foraging ground in New Zealand". New Zealand Journal of Marine and Freshwater Research 47(2). ResearchGate. Retrieved 3 March 2017.
  3. ↑ South Taranaki Bight Factual Baseline Environmental Report (PDF). Wellington: National Institute of Water and Atmospheric Research. 2011. p. 54.
  4. ↑ "Estuary origins". National Institute of Water and Atmospheric Research . Retrieved 3 November 2021.
  5. ↑ Poynton, Dan (28 July 2005). "Rare whales sighted at Castlecliff". Whanganui Chronicle . Retrieved 31 October 2020– via The New Zealand Herald.
  6. ↑ Taranaki – Where We Stand: State of the Environment Report 2009 (PDF). Taranaki Regional Council. 2009. p. 177. ISBN   978-0-473-14731-0 . Retrieved 31 October 2020.
  7. ↑ Torres, Leigh; Klinck, Holger et al. (2016). Blue whale ecology in the South Taranaki Bight region of New Zealand: January-February 2016 Field Report Archived 2017-03-03 at the Wayback Machine (pdf). Retrieved 3 March 2017.
  8. ↑ Harper, Laird (4 February 2014). "Blue whale dine out off Taranaki in their dozens". Taranaki Daily News. Retrieved 31 October 2020– via Stuff.
  9. 1 2 Craig Ashworth (17 April 2024). "Pātea seabed mining fight continues". NZ Herald. Retrieved 17 April 2024.


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