Length–weight relationships for some plecoptera and ephemeroptera from a carbonate stream in central Apennine (Italy)

摘要: The relationship between dry weight and body length for larvae of Plecoptera (Leuctra spp., Isoperla grammatica, Nemoura cinerea) Ephemeroptera (Baetis Habrophlebia fusca, Paraleptophlebia submarginata, Ecdyonurus helveticus, Rhithrogena semicolorata), collected from a carbonate stream in the Apennine (central Italy), is reported. power equation f(x) = Ax B has been applied to fit curves vs. size (length) ranges 0.03–13.00 mg 2–14 mm, respectively; total 674 were examined. model was very good agreement with experimental data. Moreover, error measured estimated 4–20% range. data on Leuctra semicolorata Baetis spp. compared those previous study different geographical setting (south-western Germany’s Black Forest) obtaining similar results but lower errors. We used two methods: weighted least-square method (WLS) an analysis covariance (ANCOVA). values A B coefficients obtained methods (<6% discrepancy either or B). found best fits all examined (species, genus, order level), while varied, loose at level also Leptophlebiidae collectively considered.