. An ecological study of the mayfly Chirotenetes [microform]. Éphémères; Mayflies; Flies; Mouches. 18 Clemens: Ecological Study of Chirotenetes flows beneath them It is in this diminished current under 1 Hve mL?"? fh"' r'''^ ;'r.'''' "^'^p'^^ °f ^*-^'; live. Many of the large shelving pieces of rock h-,^, cuj^nt unde^eath at one point a'nd'no curl^at a'n hel point. The distnbution of seine-making caddis wcrm nretn"'''' 1'^°"' t'' ^ ^'^ ^^^ indicatfon as toTd presence or absence of a current. Aleasurements were taken on July i, lois over tl, smooth flat rock in the gorg
. An ecological study of the mayfly Chirotenetes [microform]. Éphémères; Mayflies; Flies; Mouches. 18 Clemens: Ecological Study of Chirotenetes flows beneath them It is in this diminished current under 1 Hve mL?"? fh"' r'''^ ;'r.'''' "^'^p'^^ °f ^*-^'; live. Many of the large shelving pieces of rock h-,^, cuj^nt unde^eath at one point a'nd'no curl^at a'n hel point. The distnbution of seine-making caddis wcrm nretn"'''' 1'^°"' t'' ^ ^'^ ^^^ indicatfon as toTd presence or absence of a current. Aleasurements were taken on July i, lois over tl, smooth flat rock in the gorge where the wate sprltds ou i H broad sheet and where blackfly larvae and seine-makin :?e tXr "^" ""^ ^'""'^"^- ^^° -^^ m:rurTmt:!| PTater TAree /n«A« Deep bZ:"^-'-'- : : ^..f«.t per second. Close to surface - - 3-4 foot per second. Midway to bottom - - 30 " " Bottom — — — _ 2 o " '< " At various times of high water in the creek mpa«.,« ments of the vertical distributions of velocitierwerTtakeT The results of three measurements are a. fnll».,.c. '". Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Clemens, W. A. (Wilbert Amie), 1887-1964. [Toronto : University Library, pub. by the librarian]
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Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectflies, bookyear1917
