If you feel like wading through the detailed entomology, here's a science article about mayflies of Israel hosted on this site about all things Ephemeroptera [ http : / / www . ephemeroptera-galactica . com /.
42.
Biological monitoring metrics have been developed in many places, and one widely used measure is the presence and abundance of members of the insect orders Ephemeroptera, Plecoptera and Trichoptera ( common names are, respectively, mayfly, stonefly and caddisfly ).
43.
Two groups of relatively large insects, the Ephemeroptera ( dragonflies and damselflies ) have the flight muscles attached directly to their wings; the wings can beat no faster than the rate at which nerves can send impulses to command the muscles to beat.
44.
And finally when looking at the three most primitive insects with aquatic nymphs ( called naiads : Ephemeroptera, Odonata and Plecoptera ), each order has its own kind of tracheal gills that are so different from one another that they must have separate origins.
45.
In the summer of 2012, the EPT ( Ephemeroptera, Plecoptera, and Trichoptera ) taxa richness was 10 and the Becks Index value was 9 . The Hilsenhoff Biotic Index value was 3.582 and the Shannon Wiener Index value was 2.104.
46.
Other food items include insects, such as chironomids, ephemeroptera, trichoptera and hemiptera and in some Lake Kariba samples these formed 55 % of the stomach contents sampled and it is indicated by these samples that these prey items are taken on the surface at night.
47.
At the creek's mouth, approximately 20 % of the macroinvertebrate taxa are in the order " Plecoptera ", approximately 55 % belong to the order " Ephemeroptera ", roughly 20 % are in the orders " Trichoptera " and " Chironomidae ".
48.
These are Ephemeroptera, Odonata, Grylloblattodea, Plecoptera, Blattodea, Mantodea, Isoptera, Dermaptera, Orthoptera, Phasmatodea, Psocoptera, Phthiraptera, Thysanoptera, Hemiptera, Megaloptera, Raphidioptera, Neuroptera, Coleoptera, Mecoptera, Siphonaptera, Trichoptera, Diptera, Lepidoptera, and Hymenoptera, comprising in total about 195 families.
49.
Sometimes the needs for visual acuity in different functions conflict, and different parts of the eyes may be adapted to separate functions; for example, the Ephemeroptera the effect is so exaggerated that the upper part of the eye is elevated like a risen cupcake, while its lower part that serves for routine vision looks like a separate organ.
50.
At the headwaters of the creek, approximately 25 % of the macroinvertebrate taxa belong to the order " Plecoptera ", about 25 % belong to the order " Ephemeroptera ", approximately 25 % belong to the order " Trichoptera ", about 20 % belong to the order " Chironomidae ", and roughly 5 % belong to other orders.
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