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

117
Mean measurements of
an:ta'l'otiaa at Val': i01JS localities.
1'\
Latitude n Mean Mean Mean Mean) \ with
total stipe stipe holdfast med. to
length diam. diam. (rnm) high
--- (rn:) (em) (rom) division
Scott Pt. 30's 14 3.46 14.1 27.5 71
(v. strong) .61 ±I.l ±1.9
Bethe11s 53'S 32 2.S9 16,3 24.5 78 S6
(v. strong) .26 ±0.71 ±0.9 ±S (53)
Woodpecker Bay 42"02'S S3 1.99 20.9 21.3 68
(v. strong) to.1S to.7 to.6 ±3 (56)
Ohau Pt. 's 80 2.27 16,6 29.4 108 46
(v. strong) ±0.14 fO.6 to.7 flO ( 27)
Kean Pt. 42°25'S 54 2.11 12.7 25.4 38
(moderate) ±0.10 ±O.86 .0
Dar 0 42°32'S 54 2.17 6.1 17.5 126 0
(se.mishelter) to.lS .04 ±0.9 ±6 (76)
Wainui 43°49 ' S 18 1.71 11.8 15.2 100
(semishe1ter) ±0.46 ±2.0 ±0.9
Gateway Pt. 43 Q S3'S 23 2.28 15.9 31.3 0
(v. strong) .11 .0 ±1.4
Ta. u tuk u Area 1 46°37 ' S 237 2.52 29.0 41.2 156 49
(v. strong) .21 ±1.2 t1.6 ±5 (130)
Tautuku Area 10 46°37'5 57 2.70 20.2 44.6 47 19
fO.30 ±2.0 ±3.4 ±2 (56)
Ringaringa 46°54'S 72 1.91 13.7 21.5 120 0
(semishe1ter) to.l0 .6 ±0.9 i5 (160)
Figures in parentheses refer to the numbers of
measured.
of D. ant~otica plants increases
because southern plants have larger stipes and wider laminae. At
Bethells, mean plant was 1. 5 kg, the
and the majority were less than 3 kg. At Tautuku, mean
in f areas from 4.7 to 9.0 kg, with specimens y
20 kg.
The data are too and the distribution of D. anta~atiaa too
to establish whether the increase in
or
whether it increases south of a certain latitude. On the
Westland coast there is some evidence to suggest that plant size
plants at Windsor Point