202
A. DE DECKER:
Table 4. Appendicularia identified by D. DOWLER in the routine survey area of the Division of
Sea Fisheries (1964 - 65)
Species in order of abundance of
1964
1965
the 2-years total
Total
%
Total
%
Oikopleura longicauda
31057
38
9154
16
O. fusiformis
10 616
12
16293
29
O. dioica
14 863
18
5232
10
O. cophocerca
701
1
12042
22
O. rufescens
9326
11
2338
4
Fritillaria pellucida
2457
3
5644
10
F. formica
4696
6
1047
2
Oikopleura albicans
4092
5
232
0.4
Fritillaria borealis
1910
2
1682
3
Oikopleura cornutogastra
547
0.7
416
0.8
Stegosoma magnum
296
0.4
549
1
Fritillaria haplostoma
194
0.2
334
0.6
Tectillaria fertiUs
311
0.4
122
0.2
Megalocercus huxleyi
196
0.2
150
0.3
Oikopleura intermedia
230
0.3
0
O. parva
107
0.1
13
0.02
Fritillaria sp.
10
32
F. bicornis
32
0
F. megachile
16
8
Oikopleura sp.
1
10
Fritillaria taeniogona
0
3
Kowalewskia sp.
3
0
Appendicularia sicula
3
0
Folia sp.
0
2
Fritillaria fraudax
2
0
Althoffia tumida
0
2
Total: 81666
55305
in: Oikopleura cornutogastra, O. longicauda, Fritillaria formica, F. haplostoma. Both
Fritillaria species seemed more closely connected with the Atlantic sector, whereas
O. longicauda showed an increase towards the East in certain seasons.
The following species were generally more abundant in the Atlantic sector beyond the
western edge of the Bank, or off the west coast:
Oikopleura fusiformis
Fritillaria borealis
O. rufescens
Stegosoma magnum
O. dioica
Tectillaria fertilis
O. albicans
A good example of inshore distribution, doubtless connected with upwelling, is seen
in O. dioica, which is abundant at the inshore stations along the west coast and further
east around the Cape towards Cape Agulhas. It tends, however, to scatter over the Bank
and is again found in increased numbers at places where offshore upwelling is known
to occur, to the SW and S of the Bank (Fig. 7i -m).
The distribution area of Fritillaria pellucida (Fig. 7 a - d) and Oikopleura cophocerca
(Fig. 7 e- h) underwent a seasonal shift from the central part of the Bank towards the
Cape and then northward into the Atlantic. This shift took place during both years and
A. DE DECKER:
Table 4. Appendicularia identified by D. DOWLER in the routine survey area of the Division of
Sea Fisheries (1964 - 65)
Species in order of abundance of
1964
1965
the 2-years total
Total
%
Total
%
Oikopleura longicauda
31057
38
9154
16
O. fusiformis
10 616
12
16293
29
O. dioica
14 863
18
5232
10
O. cophocerca
701
1
12042
22
O. rufescens
9326
11
2338
4
Fritillaria pellucida
2457
3
5644
10
F. formica
4696
6
1047
2
Oikopleura albicans
4092
5
232
0.4
Fritillaria borealis
1910
2
1682
3
Oikopleura cornutogastra
547
0.7
416
0.8
Stegosoma magnum
296
0.4
549
1
Fritillaria haplostoma
194
0.2
334
0.6
Tectillaria fertiUs
311
0.4
122
0.2
Megalocercus huxleyi
196
0.2
150
0.3
Oikopleura intermedia
230
0.3
0
O. parva
107
0.1
13
0.02
Fritillaria sp.
10
32
F. bicornis
32
0
F. megachile
16
8
Oikopleura sp.
1
10
Fritillaria taeniogona
0
3
Kowalewskia sp.
3
0
Appendicularia sicula
3
0
Folia sp.
0
2
Fritillaria fraudax
2
0
Althoffia tumida
0
2
Total: 81666
55305
in: Oikopleura cornutogastra, O. longicauda, Fritillaria formica, F. haplostoma. Both
Fritillaria species seemed more closely connected with the Atlantic sector, whereas
O. longicauda showed an increase towards the East in certain seasons.
The following species were generally more abundant in the Atlantic sector beyond the
western edge of the Bank, or off the west coast:
Oikopleura fusiformis
Fritillaria borealis
O. rufescens
Stegosoma magnum
O. dioica
Tectillaria fertilis
O. albicans
A good example of inshore distribution, doubtless connected with upwelling, is seen
in O. dioica, which is abundant at the inshore stations along the west coast and further
east around the Cape towards Cape Agulhas. It tends, however, to scatter over the Bank
and is again found in increased numbers at places where offshore upwelling is known
to occur, to the SW and S of the Bank (Fig. 7i -m).
The distribution area of Fritillaria pellucida (Fig. 7 a - d) and Oikopleura cophocerca
(Fig. 7 e- h) underwent a seasonal shift from the central part of the Bank towards the
Cape and then northward into the Atlantic. This shift took place during both years and