Table 4 Insects and other organisms removed as “trash” on sitea
From the four-hand netb | From the grader | ||||||
|---|---|---|---|---|---|---|---|
Class | Order | Family | Species | No. of individuals (%) | Wet weight (%) | No. of individuals (%) | Wet weight (%) |
Insects | Ephemeroptera | Potamanthidae | − | − | 0.02 | 0.01 | |
Baetidae | 0.33 | 0 | 0.5 | 0.01 | |||
Ephemerellidae | 29 | 36.67 | 35 | 46.51 | |||
Heptageniidae | 15.5 | 37.63 | 11.9 | 16.9 | |||
Plecoptera | Perlidae | 0.16 | 0.6 | 0.15 | 0.9 | ||
Taeniopterygidae | − | − | 0.02 | 0 | |||
Nemouridae | − | − | 0.02 | 0 | |||
Capniidae | − | − | − | − | |||
Others | − | − | 0.02 | 0 | |||
Hemiptera | Aphelocheiridae | − | − | 0.04 | 0.92 | ||
Megaloptera | Corydalidae | Protohermes grandis | − | − | 0.02 | 0.02 | |
Trichoptera | Hydropsychidae | 5.33 | 4.94 | 5.23 | 4.65 | ||
Stenopsychidae | Stenopsyche marmorata | 0.16 | 3.86 | 0.19 | 1.98 | ||
Rhyacophilidae | 1 | 0.24 | 1.4 | 1.21 | |||
Others | 0.33 | 0.12 | 0.21 | 0.1 | |||
Coleoptera | Elmidae | − | − | 0.08 | 0 | ||
Psephenidae | 7.83 | 10.73 | 6.97 | 16.02 | |||
Diptera | 40.33 | 5.18 | 38.13 | 11.57 | |||
Total: 600 | Total: 8.29 g | Total: 5192 | Total: 74.08 g | ||||
Crustacea | Amphipoda | − | − | 6 | 0.16 | ||
Annelida | Oligochaeta | 1 | 0.01 | ||||
Platyhelminthes | Tubellaria | 1 | 0.03 | 9 | 0.02 | ||
Pisces | Rhinogobius flumineus | 1 | 0.13 | 2 | 0.49 | ||
Total debris/detritus weight (wet): | 91.25 g | 578.57 g (Est.) | |||||
Total weight (wet): | 99.7 g | 723.02 g (Est.) | |||||
Debris/detritus weight (%): | 91.52 | 80.02 (Est.) | |||||
Insects and other organisms' weight (%): | 8.47 | 19.97 (Est.) | |||||