A biological study of Durvillaea antarctica (Chamisso) Hariot and D ...

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D. antarctica is aistributed around most of New Zealand,
including all the southern islands and the Chatham Is.
on the Hest Auckland coas't, ana in very
It grotiiS
places
between North and East Cape there are
The grows on various reefs and south of East
along the Gisborne coast to Mahia Peninsula. It is absent from
Hawke Bay but becomes increasingly abundant south of
The most northern record on the west coast of Wellington is the south
coast: of Kapi ti I, (Hoggard).
In the South Island;
all southern islands and
the Chatham Is, D. antarctica forms a more-or-less continuous band
shores subjected to strong or moderate wave force.
does not occur, or is sparsely distributed on three
long stretches of open coast: the North Island west coast
between Kapiti I, and Albatross Point; (.ii) exposed places on the
south side of Cook Strait, southern Westland near Jackson
The coast between I. and Albatross Point is the longest
stretch of coast uninhabited by DuY'Vi in New Zealand. Most of
the shore is beachi or beach of soft
mudstone boulders. There are, however, a few areas where the
substratum appears to be sui table for Durvi
About 15 km
west of wanganui there are some stable boulder reefs, and the
shore just south of , near ~w~,,~,.=, appears to be suitable
habi ta t. So too are areas neax New Further north at
Urenui, Pariokariwa, Tongaporutu, Awakino, Waikawau, and Gannet I.
there is stable rocky shore, but
grows at none of these
Morton and Miller (1968:294) incorrectly assumed that
DuY'Villaea grew on small islands near New Plymouth and at Gannet I
The southern extent of the D. anta:t'ctica popUlation on the west
Auckland coast is just south of Albatross Point.
Duroillaea grows
on the south side of Cook
Strait. Many areas that appear to be suitable habitat for the kelp
are dominated by Carpophyllunl mascha
There is no Durvillaea
Point and stevens I. A few stunted specimens of
both grow on The Brothers, and there is a small bed on the
east side of the entrance to Channel. Li'ttle DuT'viZ grows
on the rocky coast between Channel and Cloudy Bay.
In southern Westland several stable areas are devoid
of Durvil Neither species grows at Jackson Head, Open I.
or Arnott Head, although drift
fetch up on these sh~res.