16 
PACIFIC SCIENCE, Vol. XIII, January 1959 
100 ® 
79® 
FOVEAUX 
1^9° 
SOUTH EAST NEW ZEALAND 
— Showing — 
Siation positions between 
FOVEAUX STRAIT AND DUNEDIN 
Plankton Stations 
Series Symbol Nos . 
1 ® 10-153 
2 Q 159- 192 
3 193- 228 
4 (g) 229- 314 
Salinity/Temperature Stations ••• 
loo-fathom Contour — - 
ISLAN5- 
NUOOE 
109 
40® 
^39 ®®2I8 
153' 
* 192® 
1993 
15 •I89®*®208 
190© 
188 0 
'87c?p 
212 3 
310 ® / 
' 308 '® 
'V- • 
‘'-►-^301 
304 ® 
::DUNEDIN 
12 . 2 ^. f 
i291 
® • 46 ” 
• 
• <■ 
WMm • . / 
) / 
• / 
4 165 © i'L 
21 ® • * 
* • ^ 7*9 */ 285 ® 
• /' 
^_/® 27 p 
— 
\ 
AT 
Fig. 1. Temperature/saliniry and plankton stations in and about Foveaux Strait, southern New Zealand. Only 
plankton stations are numbered. 
few days except for Series 1, in which stations 
accumulated irregularly over a period of 18 
days; however, the stations are mostly from 
Eoveaux Strait (Eig. 1). Information about 
the series is summarised in Table 1. In Eig- 
ures 1, 2, and 3, each series of stations is 
symbolised separately; in subsequent figures 
this has not been practicable and for these it 
is necessary to locate stations in Eigures 1, 
2, or 3. 
The method develops in two stages. In the 
first, each species is plotted, showing the 
order of its abundance, in the intercept of the 
salinity and temperature for all stations at 
which it was taken. In effect, species occur- 
rences are superimposed on the T-S diagram 
to produce the temperature-salinity-plankton 
(T-S-P) diagrams (Pigs. 5-10; note that the 
scale of Pigs. 3 and 10 differs from that of 
Figs. 5-9). The correlations of specie and 
water properties thus demonstrated, together 
with previous distributional records of the 
species, have enabled species to be selected 
which occur consistently within those ranges 
of properties typifying certain water bodies. 
These species are indicator species, and 25 
have been selected. They form into four 
separate groups (Tables 3, 4), each of which 
is considered to represent the planktonic pop- 
ulation normally associated with a particular 
range of environmental conditions. Figure 10 
summarises the interrelationships of these 
four groups. In the second stage, the distribu- 
tion of each group in the T-S-P diagrams is 
correlated with the geographic distributions 
of both the group and properties of the wa- 
ters. In this way, those similarities and differ- 
ences of the planktonic content between sta- 
