Open Access
Table AII
Diet composition of three length groups (TL) of the Caucasian dwarf goby in the Stugna River: %F = frequency of occurrence; %IRI = percent index of relative importance.
| Prey item | Length group | |||||
|---|---|---|---|---|---|---|
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| <20 mm (n = 23) | 20–29 mm (n = 173) | >29 mm (n = 119) | ||||
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| %F | %IRI | %F | %IRI | %F | %IRI | |
| Oligochaeta | 0.58 | <0.01 | 0.84 | 0.02 | ||
| Dreissena polymorpha | 0.84 | 0.01 | ||||
| Anodonta glochidia | 0.58 | <0.01 | 0.84 | <0.01 | ||
| Bosmina longirostris | 47.83 | 10.56 | 6.94 | 0.49 | 1.68 | 0.02 |
| Bosmina coregoni | 0.58 | <0.01 | ||||
| Chydorus sphaericus | 34.78 | 3.68 | 18.50 | 0.40 | 15.97 | 0.56 |
| Sida crystallina | 4.35 | 0.18 | ||||
| Ceriodaphnia sp. | 17.39 | 1.60 | 5.20 | 0.08 | 0.84 | <0.01 |
| Alona affinis | 4.35 | 0.07 | 6.36 | 0.09 | 10.08 | 0.13 |
| Alona sp. | 4.35 | 0.27 | 13.29 | 0.57 | 23.53 | 1.19 |
| Pseudochydorus globosus | 5.20 | 0.07 | 7.56 | 0.11 | ||
| Pleuroxus aduncus | 17.39 | 1.65 | 10.40 | 0.13 | 13.45 | 0.29 |
| Pleuroxus sp. | 4.35 | 0.06 | 1.68 | <0.01 | ||
| Disparalona rostrata | 17.39 | 1.84 | 19.65 | 1.70 | 16.81 | 2.20 |
| Graptoleberis testudinaria | 4.35 | 0.06 | 1.73 | 0.01 | 1.68 | 0.01 |
| Camptocercus sp. | 3.47 | 0.02 | 1.68 | <0.01 | ||
| Alonella sp. | 8.70 | 0.16 | ||||
| Acroperus harpae | 23.70 | 2.36 | 22.69 | 2.22 | ||
| Scapholeberis mucronata | 1.16 | <0.01 | ||||
| Eurycercus lamellatus | 2.31 | 0.02 | 4.20 | 0.09 | ||
| Diaphanosoma sp. | 8.70 | 0.17 | 7.51 | 1.34 | ||
| Simocephalus sp. | 2.89 | 0.03 | ||||
| Anchistropus emarginatus | 0.58 | <0.01 | 4.20 | 0.08 | ||
| Leptodora kindtii | 1.16 | <0.01 | ||||
| Cyclopoida | 39.13 | 15.98 | 76.88 | 71.88 | 79.83 | 40.81 |
| Harpacticoida | 26.09 | 1.34 | 4.62 | 0.02 | 2.52 | <0.01 |
| Ostracoda | 0.58 | <0.01 | 0.84 | <0.01 | ||
| Amphipoda | 0.84 | <0.01 | ||||
| Acari | 0.58 | <0.01 | ||||
| Chironomidae larvae | 82.61 | 62.38 | 58.38 | 20.68 | 76.47 | 52.19 |
| Chironomidae pupae | 4.62 | 0.06 | 6.72 | 0.06 | ||
| Caenis sp. | 1.73 | 0.01 | ||||
| Baetis sp. | 1.16 | <0.01 | 0.84 | <0.01 | ||
| Orthotrichia sp. | 1.16 | <0.01 | ||||
| Other Trichoptera | 1.16 | 0.02 | 0.84 | <0.01 | ||
| Micronecta scholtzi | 0.58 | <0.01 | ||||
| Ceratopogonidae | 0.84 | <0.01 | ||||
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