TABLE XI11
The Number of Adult ( A ) and Young ( Y ) Triclads Eaten by Predators in Laboratory Experiments. ( p ) = Portions Eaten.
(Reprdueed with permission from Young and Reynoldson, 1965.)
No. of
predators
used
No. of
each size
of triclad
sp. used
No. of triclads eaten
Total
P . tenuis
D. lugubrk
D . lucteum
eaten
A
Y
A
Y
A
Y
1400
P . nigra
A
Y
Predator
COELENTERATX
Hydra oligactis Pallas
HIRUDIKEA
Helobdella stagnalis (Linn.)
Erpobdella octocuulata (Linn.)
COLEOPTERA
adults of
A . paludosw, (Fab.)
Colymbetea fuscw, (Linn.)
Ilybiua fuliginosw, (Fab.)
Rhantw, bistriatw, (Bergst .)
Deronectes sp. (adults)
Dermectea sp. (larvae)
DytiscuB marginalis (Linn.)
Dytiscw, marginalis (larvae)
Haliplus ~ p .
(adults)
Haliplus sp. (larvae)
~4gabzl8 dirlyn~us (oliv.)
(adults)
20
50
@
3
0
2
0
5
0
6
16
0
0
1
7
0
0
0
5
0
0
0
3
0
0
0
4
0
30
20
20
50
50
10
10
10
10
10
10
10
50
50
50
50
50
50
50
0
4
0
0
0
0
0
0
0
0
0
0
0
0
0
2
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
11
16
0
0
0
0
UP) 0
95*
10t
0
0
5
5
10
10
25
25
50
50
10
12
0
2
0
0
0
0
11
13
0
3
0
0
0
0
* 9Sj200
t 10,'200