TABLE IV.
Activity of extracts from organisms of different phyla.
Balanw balanoides cyprids were offered a choice of slate panels previously soaked in an extract or culture of the appropriate
organism, slate panels previously soaked in an extract of adult Balanzls balanoides and clean slate panels. (From Table 8, Crisp
and Meadom, 1962.)
The chemical basis of gregariousness in barnacles.
Extracts wed to treat experimeatal panels
No. of cyprids settling on panels treated with
(6)
( b )
Balanus
experimental
untreated
balanoides
extract
controls
extract
( a )
Unicellular algae
Phaeodactylzlm tricornutum (culture)
2
121
1
Navicula salinicola (culture)
9
133
1
Chlorophyceae
Ulva lactwa
4
50
1
Phaeophyceae
F u c w serratue
0
8
1
Rhodophyceae
Cora.?lina oficinalis
12
50
1
Porifera
Ophlitaspongia seriata
72
119
6
Coelenterata
Metridium senile
2
25
1
Annelids
Arenicola marina
4
93
3
Arthropoda-Crustacea
Branchio poda
Artemia salina
13
19
0
Cirripedia
Lepas hilli
62
84
1
Chthamalua stellatus
72
109
0
Balanus balanus
101
104
2
Blaberus sp.
50
85
0
Mollusca
m e l l a iapiiiu~
9
37
0
Echinodermata
Asteriaa rubena
3
93
3
Pisces
Blennius pholis
269
354
8
Mammalia
Bos taurus
13
116
7
-1nsecta
W
s