Acrolein Hazards to Fish, Wildlife, and Invertebrates PDF Download
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Author: Ronald Eisler
Publisher:
ISBN:
Category : Aldehydes
Languages : en
Pages : 36
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Book Description
Author: Ronald Eisler
Publisher:
ISBN:
Category : Aldehydes
Languages : en
Pages : 36
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Book Description
Author:
Publisher:
ISBN:
Category : Fish culture
Languages : en
Pages : 494
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Book Description
Author: William Roland Nelson
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Category : Fishes
Languages : en
Pages : 24
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Book Description
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.
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1746
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Author: Donald V. Rottiers
Publisher:
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Category : Calorimeters
Languages : en
Pages : 16
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Book Description
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.
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1724
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Book Description
Author: American Society for Microbiology. Applied and Environmental Microbiology Division. Meeting
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Category : Microbial ecology
Languages : en
Pages : 44
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Author: Environmental Science Information Center. Library and Information Services Division
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Category : Ecology
Languages : en
Pages : 96
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Author: Roy F. Heberger
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ISBN:
Category : Biochemical oxygen demand
Languages : en
Pages : 24
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Book Description
Samples of crustacean zooplankton were collected monthly in west-central Lake Erie in April and June to October 1968, and in July and August 1970, before and during periods of hypolimnetic dissolved oxygen (DO) depletion. The water column at offshore stations was thermally stratified from June through September 1968, and the hypolimnion contained no DO in mid-August of 1968 or 1970. Composition, abundance, and vertical distribution of crustacean zooplankton changed coincidently with oxygen depletion. Zooplankton composition shifted from mainly cyclopoid copepods in July to mainly cladocerans and copepod nauplii in middle to late August. We believe that mortality of adults and dormancy of copepodites in response to anoxia was the probable reason for the late summer decline of planktonic C. b. thomasi.
Author: Herman O. Sanders
Publisher:
ISBN:
Category : Acute toxicity testing
Languages : en
Pages : 12
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Book Description
Technical grade and field formulations of six experimental forest insecticides -- methomyl, carbaryl, aminocarb, trichlorfon, fenitrothion, and acephate -- were tested for acut toxicity against three species of aquatic invertebrates, (a daphnid, an amphipod, and larvae of a midge), and four species of fish (bluegill, rainbow trout, fathead minnow, channel catfish). Five of the six insecticides were highly toxic or extremely toxic to the daphnid, amphipod, and midge larvae. The sixth insecticide, acephate, was not toxic to invertebrates at concentrations up to 50 mg/L. Five of the insecticides ranged from highly toxic (methomyl to channel catfish) to relatively non-toxic (trichlorfon to fathead minnows); the sixth, acephate, was only slightly toxic to the fishes tested.
