Acrolein, Dalapon, Dichlobenil, Diquat, and Endothal
Acrolein, Dalapon, Dichlobenil, Diquat, and Endothal

Author: Leroy C. Folmar

Publisher:

Published: 1977

Total Pages: 24

ISBN-13:

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Toxicity tables for the herbicides acrolein, dalapon, dichlobenil, diquat, and endothal list the test organisms, types of tests, experimental conditions, and test results. Each table is followed by a list of references. The materials provide a useful source of toxicity data on these herbicides to researchers, regulatory agencies, and manufacturers.

Ecology of Larval Fishes in Lake Oahe, South Dakota
Ecology of Larval Fishes in Lake Oahe, South Dakota

Author: William Roland Nelson

Publisher:

Published: 1980

Total Pages: 24

ISBN-13:

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The time and location of spawning, food and larvae, and habitats used as nursery areas by young-of-the-year fishes were studied from 1972 to 1975 in South Dakota waters of Lake Oahe, a main stem Missouri River reservoir. Sampling locations were in the tributary rivres -- the Grand Moreau, and Cheyenne -- and their embayments. Year-class strength of river-spawning species was strongly correlated with river flow rates during the spawning season. Success of reservoir-spawning species was primarily dependent on above-average water levels, which inundated terrestrial vegetation to provide a substrate for egg deposition and cover for larvae. Preserving adequate streamflow and enhancing reservoir shoreline areas by managing water levels, seeding vegetation, and eliminating grazing alongshore would probably ensure adequate reproduction of most areas.

Proximate Composition and Caloric Content of Eight Lake Michigan Fishes
Proximate Composition and Caloric Content of Eight Lake Michigan Fishes

Author: Donald V. Rottiers

Publisher:

Published: 1982

Total Pages: 16

ISBN-13:

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The proximate composition (percentage lipid, water, fat-free dry material, ash) and caloric content of eight species of Lake Michigan fish were measured: lake trout, coho salmon, lake whitefish, bloater, alewife, rainbow smelt, deepwater sculpin, and slimy sculpin. Except for alewives, proximate composition and caloric content did not differ significantly between males and females. Although the caloric content of all species varied directly with lipid content and inversely with water content, an increase in lipid content did not always coincide with a proportional increasein caloric content when other components of fish composition were essentially unchanged. This observation suggests that the energy content of fish estimated from the proximate composition by using universal conversion factors may not necessarily be accurate.