Conference Proceedings - IAD

39th IAD Conference, August 2012, Szentendre, Hungary
The Trophic index values (Fig. 3) show more refined data from Table 2. There
the diferences in the trophic level of the food of rudd and roach from the
Srebarna Lake and the other sampling place is also well visible. The values of
the index for the predaceous species (the pike, the pike perch and the asp) show
high degree of conservatism.
Figure 3. Trophic Index – (TI) values for common fish species in the three wetlands and
the Danubian ripal, Legend: see Table 2.
(A)
(B) (C)
Figure 4. Danubian ripal trophic webmodel (A) with a prediction for development of the
system while increasing the factor of Fine particulate organic matter (FPOM), relative
importance (B) and decreasing the factor predatory fish (C). Legend: FPOM – see
above, MZB - macrozoobenthos, ZbvF – Zoobenthivorous fishes, PrF – Predaceous
fishes.
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