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Table 3 Electivity values of prey categories consumed by N. microspilotus

From: Food habit of the endangered yellow-spotted newt Neurergus microspilotus (Caudata, Salamandridae) in Kavat Stream, western Iran

Prey category Diet Macroinvertebrate Electivity (E i)
N %N N %N
Annelida-Lumbricidae 22 4.5 1316 27.20 −0.72b
Amphipoda-Gammaridae 48 9.82 590 12.19 −0.11
Diptera-Mycetophilidae 120 24.54 971 20.06 0.10
Diptera-Cecidomyiidae 13 2.66 85 1.76 0.20
Hemiptera-Veliidae 4 0.82 51 1.05 −0.13
Coleoptera-Dytiscidae 5 1.02 93 1.92 −0.31
Coleoptera-Elmidae 1 0.2 7 0.14 0.17
Ephemeroptera-Baetidae 96 19.63 289 6.16 0.52a
Ephemeroptera- Heptageniidae 9 1.84 335 6.92 −0.58b
Trichoptera-Hydropsychidae 25 5.11 309 6.39 −0.11
Hymenoptera-Formicidae 3 0.61 13 0.27 0.39
Mesogastropoda-Bithynidae 9 1.84 6 0.12 0.87a
Veneroida-Corbiculidae 117 23.93 77 1.6 0.88a
Tricladida-Planariidae 8 1.64 450 9.3 −0.70b
Orthoptera-Caelifera 5 1.02 0 0 1a
Eggs (of themselves) 4 0.82 0 0 1a
Hygrophila-Planorbidae 0 0 6 0.12 −1b
Diptera-Tipulidae 0 0 32 0.66 −1b
Diptera-Chamaemyiidae 0 0 119 2.5 −1b
Ephemeroptera-Ephemeridae 0 0 81 1.67 −1b
Total 489 100 4,839 100  
  1. In Kavat Stream, west Iran (n = 45 stomach contents); macroinvertebrate species are expressed as the number of individuals per square meter in the study area. aPreferred prey taxa (E i > 0.5); bavoided prey taxa (E i < −0.5); N total abundance; %N relative abundance.