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Tests to determine the effects of cu...

Prenosil, Erik Joseph.

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Tests to determine the effects of culverts on fish and macroinvertebrates in central Nebraska streams.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Tests to determine the effects of culverts on fish and macroinvertebrates in central Nebraska streams./
作者:	Prenosil, Erik Joseph.
面頁冊數:	91 p.
附註:	Source: Masters Abstracts International, Volume: 53-04.
Contained By:	Masters Abstracts International53-04(E).
標題:	Aquatic sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1562283
ISBN:	9781321091717

Tests to determine the effects of culverts on fish and macroinvertebrates in central Nebraska streams.
Prenosil, Erik Joseph.

Tests to determine the effects of culverts on fish and macroinvertebrates in central Nebraska streams. - 91 p.

Source: Masters Abstracts International, Volume: 53-04.

Thesis (M.S.)--University of Nebraska at Kearney, 2014.

This item must not be sold to any third party vendors.

Road crossing structures can change stream morphology because water velocities are often increased by the structure and a waterfall can be created on the downstream side. These changes potentially limit the ability of stream fishes to reach upstream areas. In this study, the swimming and jumping performance of stream fishes were tested. A ten liter swim tunnel and an artificial waterfall were used to test ten species of fish from five families. Swimming tests were conducted at 17.5° C to determine maximum swimming speed by using a constant acceleration test at 5 cm/s every 10 seconds. The swimming results varied with largemouth bass having the highest (65+/-1.7 cm/s) and mosquitofish having the lowest mean swimming velocity (37.5+/-1.2 cm/s). Jumping tests were conducted using a weir that was increased at a height of 1 cm per trial until none of the 10 individuals of a species could clear the height. Jumping results varied with green sunfish clearing the greatest height (13 cm) and bluegill which did not jump at all.

ISBN: 9781321091717Subjects--Topical Terms:

3174300
Aquatic sciences.

Tests to determine the effects of culverts on fish and macroinvertebrates in central Nebraska streams.
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245 1 0 $a Tests to determine the effects of culverts on fish and macroinvertebrates in central Nebraska streams.
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500 $a Source: Masters Abstracts International, Volume: 53-04.
500 $a Adviser: W. Wyatt Hoback.
502 $a Thesis (M.S.)--University of Nebraska at Kearney, 2014.
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520 $a Road crossing structures can change stream morphology because water velocities are often increased by the structure and a waterfall can be created on the downstream side. These changes potentially limit the ability of stream fishes to reach upstream areas. In this study, the swimming and jumping performance of stream fishes were tested. A ten liter swim tunnel and an artificial waterfall were used to test ten species of fish from five families. Swimming tests were conducted at 17.5° C to determine maximum swimming speed by using a constant acceleration test at 5 cm/s every 10 seconds. The swimming results varied with largemouth bass having the highest (65+/-1.7 cm/s) and mosquitofish having the lowest mean swimming velocity (37.5+/-1.2 cm/s). Jumping tests were conducted using a weir that was increased at a height of 1 cm per trial until none of the 10 individuals of a species could clear the height. Jumping results varied with green sunfish clearing the greatest height (13 cm) and bluegill which did not jump at all.
520 $a Road crossing structures may also affect aquatic macroinvertebrates. Road crossing structures in the South Loup River were assessed using Hester-Dendy samplers placed along each bank at two sites that had single barrel culverts, double barrel culverts and bridges. Samplers were placed 100 meters upstream of the crossing, directly upstream, directly downstream and 100 meters downstream the road crossing. A total of 13,252 macroinvertebrates were collected with 81% of the individuals belonging to Ephemeroptera, Trichoptera or Plecoptera. There were no significant differences in total abundance of invertebrates by road crossing type or distance from road crossing.
520 $a The swimming and jumping data for fish are critical to modeling potential barriers to dispersal. The data collected in this study indicate that most stream fishes would not be impeded by the assessed road crossings on the South Loup River. Results also suggest that these structures do not affect the abundance of macroinvertebrates.
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