Les rotifères constituent aussi des proies de choix. Les diaptomides adultes mangent en moyenne jusqu'à 12 cyclopides ou diaptomides par jour, ou même davantage. gigas se nourrit probablement à la fois par prédation et par filtrage et consomme 150 petits crustacés ou plus par jour. vernalis et Branchinecta gigas montrent que ces espèces de prédateurs peuvent capturer et manger des proies de diverses tailles appartenant à de nombreuses espèces. nevadensis, Cyclops bicuspidatus thomasi, C. Résuméĭes études expérimentales faites sur Diaptomus shoshone, D. Hence, codominance of the zooplankton by predaceous diaptomid and cyclopoid species is unlikely. Furthermore, each species is a potential predator on the other, where the role of predator or prey is determined by the relative size or instar of the two groups. Predaceous diaptomids and cyclopoids will eat the same prey species at rates which are influenced more by hunger than by abundance of prey. thomasi can eat six or more prey animals daily, depending on the size of the prey. Cannibalism probably causes the uniformity in body size and instar of predaceous diaptomids in some populations, C. Predation rates are inversely proportional to prey size. nevadensis eat up to 12 or more cyclopoids or diaptomids per day.
gigas probably combines raptorial with filter feeding and can eat 150 or more smaller crustaceans per day.
vernalis, and Branckinecta gigas show that these predatory species can capture and eat many prey species of various sizes. Experimental studies on Diaptoimus shoshone, D.
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