Abilities of trout to swim through highway culverts / David Andrew Belford.
Material type:
TextPublication details: Bozeman, MT : Montana State University, 1986.Description: xiii, 67 leaves : ill. , map ; 28 cmOnline resources: Abstract: Seven culverts in Montana were studied from 1984 - 1986 to determine conditions that allowed and prohibited the passage the passage of rainbow trout, brown trout, cutthroat trout and brook trout. A curve was fitted to the most stringent combinations of distances and average bottom water velocities between rest sites in culverts trout swam through. This curve indicated that for distances between rest sites of 0 - 20 m, average bottom velocities of near or below 0.83 - 0.64 m/s,respectively permitted passage. Trout 185 - 470 mm in total length passed through culverts with these maximum conditions. No differences in swimming ability were noted among the four trout species studied in the field. Laboratory swimming stamina tests indicated that brown trout,rainbow trout and cutthroat trout had similar staminas. All three types of culvert modifications studied created conditions that permitted trout passage.
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Thesis(M.S.)--Montana State University, 1986.
Includes bibliographical references (leaves 65-67).
Seven culverts in Montana were studied from 1984 - 1986 to determine conditions that allowed and prohibited the passage the passage of rainbow trout, brown trout, cutthroat trout and brook trout. A curve was fitted to the most stringent combinations of distances and average bottom water velocities between rest sites in culverts trout swam through. This curve indicated that for distances between rest sites of 0 - 20 m, average bottom velocities of near or below 0.83 - 0.64 m/s,respectively permitted passage. Trout 185 - 470 mm in total length passed through culverts with these maximum conditions. No differences in swimming ability were noted among the four trout species studied in the field. Laboratory swimming stamina tests indicated that brown trout,rainbow trout and cutthroat trout had similar staminas. All three types of culvert modifications studied created conditions that permitted trout passage.