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any insect of the order Plecoptera. North American species, of which there are more than 200, are yellowish, greenish, or brownish in the adult stage and have transparent wings, usually two pairs, but seldom fly. The eggs are deposited in the water; the abundant aquatic nymphs are found under stones, hence their name. Since the gills are poorly developed, the nymphs are confined to well-aerated waters, such as fast streams, where they form one of the most important food supplies for fresh-water fishes. One to three years may be required to reach the adult stage. Fishermen refer to adult stoneflies as browns and imitate their shape in lures. Stoneflies are classified in the phylum ArthropodaArthropoda
[Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes, millipedes, spiders, scorpions, and the extinct trilobites.
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, class Insecta, order Plecoptera.
References in periodicals archive ?
cascadae at Mack Creek consumed philopotamid caddis flies and ostracods at levels well above their abundance, and heptageniid mayflies and perlid stoneflies well below their abundance (Table 3).
Nevertheless, there is no published information on stoneflies from the Tolima province, Central Colombia, except for the first record of the Gripopterygidae family in the Paramo ecosystem (Barreto et al.
The first record of stoneflies from the Malvinas/Falkland islands.
Feeding habits of the predaceous stoneflies in a salmon stream of the Russian Far East, pp 73-78.
The hatch activity begins in late April and early May with Blue Quills, Quill Gordons, and Hendricksons, as well as stoneflies and caddis.
Epibenthic taxa overwhelmingly consisted of may flies (Order Ephemeroptera) and stoneflies (Order Plecoptera), mobile taxa that dominate the epibenthic fauna of most stony streams and are very common components of the diet of both fish and invertebrate predators.
In February 1986, April 1986, and August 1986, the chironomids were included as top species as there were no large stoneflies or caddisflies consuming them.
One study of the zone under Montana's Flathead River in 1984 found immature stoneflies in groundwater 1.
A laboratory study of predator-prey interactions of stoneflies and mayflies.
Consequently, immature stoneflies react negatively to the effects of degraded environmental quality.
Insects from 30 families and six orders were identified: mayflies, dragonflies, stoneflies, beetles, caddisflies, and two-winged flies.