meridianus with altitude is a compensatory adaptation.
Keywords: Midday gerbil, Meriones meridianus, auditory bulla, altitude, environmental factors.
was found in low abundance whereas Mesocyclops meridianus (Kiefer 1926) was frequent.
meridianus (Copepoda) was frequent in the floating macrophytes area.
meridianus (Steel, 1961), Jaera italica and J nordmanni (Veuille, 1980).
Taxon C0 C1 C2 C3 COPEPODA Cyclopidae Eucyclops elegans (Herrick, 1884) X Mesocyclops
meridianus (Kiefer, 1926) X X X X Metacyclops mendocinus (Wierzejski, 1892) X X X X Paracyclops chiltoni (Thomson, 1883) X Thermocyclops decipiens (Kiefer, 1929) X X X X Thermocyclops inversus (Kiefer, 1936) X X Tropocyclops prasinus (Fischer, 1860) X X Diaptomidade Notodiaptomus cearensis (Wright, 1936) X X X X Harpacticoida Potamocaris sp.
CALANOIDA Argyrodiaptomus furcatus (Sars, 1901) Notodiaptomus conifer (Sars, 1901) Notodiaptomus iheringi Wright, 1935 CYCLOPOIDA Eucyclops serrulatus (Fischer, 1851) Mesocyclops longisetus (Thiebaud, 1914) Mesocyclops
meridianus Kiefer, 1926 Mesocyclops kieferi van de Velde, 1984 Paracyclops fimbriatus (Fischer, 1853) Thermocyclops decipiens (Kiefer, 1929) Thermocyclops minutus (Lowndes, 1934) POECILOSTOMATOIDA Ergasilus sp.