Chronic Effects of Methoxychlor on Bluegills and Aquatic Invertebrates PDF Download
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Author: Harry D. Kennedy
Publisher:
ISBN:
Category : Aquatic invertebrates
Languages : en
Pages : 22
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Book Description
Significantly higher numbers of aquatic insects were sampled in treated ponds than in untreated, and insect numbers at high-treatment ponds were significantly higher than at low-treatment ponds. Chironomids were dominant and significatnly increased after a certain level of treatment. Chironomids comprised 74 percent of samples from high-treatment ponds, but only 43 and 42 percent respectively fro untreated and low-treatment ponds. Methoxychlor residues were not detectable in pond-bottom mud samples.
Author: Harry D. Kennedy
Publisher:
ISBN:
Category : Aquatic invertebrates
Languages : en
Pages : 22
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Book Description
Significantly higher numbers of aquatic insects were sampled in treated ponds than in untreated, and insect numbers at high-treatment ponds were significantly higher than at low-treatment ponds. Chironomids were dominant and significatnly increased after a certain level of treatment. Chironomids comprised 74 percent of samples from high-treatment ponds, but only 43 and 42 percent respectively fro untreated and low-treatment ponds. Methoxychlor residues were not detectable in pond-bottom mud samples.
Author: W. Waynon Johnson
Publisher:
ISBN:
Category : Acute toxicity testing
Languages : en
Pages : 106
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Author:
Publisher:
ISBN:
Category : Fish-culture
Languages : en
Pages : 520
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Author: United States. Bureau of Sport Fisheries and Wildlife
Publisher:
ISBN:
Category : Fish culture
Languages : en
Pages : 736
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Book Description
Author: United States. Bureau of Sport Fisheries and Wildlife
Publisher:
ISBN:
Category : Fish culture
Languages : en
Pages : 758
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Author:
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 716
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Author: R. E. Putz
Publisher:
ISBN:
Category : Cryptobia
Languages : en
Pages : 32
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Book Description
Studies on two hemoflagellates of fish were carried out to determine biological parameters: host range, vector relations, in vivo culture, in vitro culture, pathogenicit, and cryogenic preservation.
Author: Laurie G. Fowler
Publisher:
ISBN:
Category : Pacific salmon
Languages : en
Pages : 16
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Book Description
Feeding trials using fall chinook salmon finglerlings were conducted at the Salmon Cultural Laboratory, Longview, Washington, during 1971 for the purpose of improving the Abernathy diet formula. The results indicated that cottonseed meal could replace a portion of the fish meal in the diet without reducing fish growth, but similar substitutions of wheat and corn gluten meal reduced growth. Fish growth was significantly increased when a diet containing 50 percent protein and 3,350 kcal per kilogram was fed as compared with a diet containing 45 percent protein and 3,350 kcal per kilogram. Soybean lecithin proved to be equal to soybean oil as a caloric source when fed at 2 percent of the diet. Two types of dried whey product with different levels of lactose content produced similar growth response. Reducing the dried whey portion of the diet to 5 percent did not affect growth, nor did methionine supplementation produce any effects. Anchovy meal was unsuitable as a replacement for herring meal.
Author: Charles R. Gasaway
Publisher:
ISBN:
Category : Fish declines
Languages : en
Pages : 36
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Book Description
The total number of adult fish in Lake Frances Case, a main steam Missouri River Reservoir, has declined since impoundment in 1952. Goldeye, channel catfish, and northern redhorse have probably remained the same; emerald shiner, white bass, walleye, and possibly flathead catfish have increased. The sauger population began to decline at about the time walleye numbers increased. Some species formerly present have become rare. Forage species in the reservoir were gizzard shad, emerald shiner, and yellow perch, but these were not present in large enough numbers to provide an abundant forage fish population.
Author: Donald F. Amend
Publisher:
ISBN:
Category : Bacterial diseases in fishes
Languages : en
Pages : 18
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Book Description
Nifurpirinol (NFP), also know by code name P-7138, was tested for control of furunculosis, myxobacterioses, and vibriosis, and for effects on rainbow trout, coho, and chinook salmon under various conditions. Further tests are needed to verify the use of NFP for control of other bacterial diseases.
