Table 6.10. Trophical structure of the reef-fish community in the central part of the GBR according to results obtained by processing 10
(')
explosion samples. (Data by Williams and Hatcher 1983)
0
3
3
Trophic guilds
Sources of food
Number of
Percentage of
Number of
Average
c
g.
species
total weight of
specimens,
individual
C;;.
fish sampled
% of total
weight, g
'"
en
in samples
...
..,
c
!4
Herbivores
Detritus sediments, microphytobenthos, periphyton
16
9.4
c
..,
Seagrass, macrophytes, crusts of coralline algae
32
7.0
."'
Total herbivorous fish
48
16.4
6.6
8.7
»
r::r
Planktonovores
Mesozooplankton, phytoplankton and suspended detritus
60
20.6
c
::I
Gelatinous macrozooplankton
4
36.6
0I»
Total planktonovorous fish
64
57.2
85.3
2.3
::I
n
Benthovores
Bottom invertebrates
156
16.2
."'
Corals
15
3
0
Zoobenthos, plants (omnivores)
14
1.5
~.
..,
Total benthovorous fish
185
20.7
7.0
10.3
6'
c
Piscivorous
Fish
11
2.2
g.
predators
Fish and benthic invertebrates
15
3.5
:l
Total piscivorous predatory fish
26
5.7
1.1
19.0
!j