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Author : Verne Elbert Davison
Publisher : Unknown
Page : 32 pages
File Size : 49,6 Mb
Release : 1947
Category : Agriculture
ISBN : MINN:30000010166944
Author : Herman O. Sanders,David F. Walsh,Robert Seymour Campbell
Publisher : Unknown
Page : 12 pages
File Size : 45,7 Mb
Release : 1981
Category : Aquatic invertebrates
ISBN : UOM:39015086512327
Application of the organophosphate insecticide Abate three times (at about monthly intervals) to duplicate 0.04 ha earthen ponds at 18 g/ha (4 micrograms/liter) -- the recommended application rate -- and 180 g/ha (40 micrograms/liter) caused no mortality on blugills. In ponds treated with 18 g/ha fewer bluegill fry were produced than in control ponds, brain acetylcholinesterase (AChE) activity was not affected, and accelerated growth of both fry and adults appeared to result from heavy feeding on dead or moribund Diptera larvae that resulted from the first two applications of Abate. The routine use of Abate at the recommended rate should have little adverse effect on fishery resources.
Author : John Cairns,Richard E. Sparks,United States. Environmental Protection Agency
Publisher : Unknown
Page : 60 pages
File Size : 55,6 Mb
Release : 1971
Category : Bluegill
ISBN : UOM:39015004629237
In conjunction with already existing methods for measuring the chemical and physical characteristics of water, methods for rapidly measuring biological effects of water quality would be very useful. Thus the authors studied the effects of pollution on the breathing rates of bluegills. The presence of zinc at concentrations of 8.7, 5.22, 4.16 and 2.55 mg/l in dechlorinated municipal tapwater was detected by an increase in breathing rate or a change in breathing rate variance of bluegills. None of the fish exposed to the three lower concentrations died during the experiments. The criterion for detection was an arbitrary number of responses occurring at the same time. An in-plant system for the prevention of fish kills caused by spills could be developed by monitoring several biological functions of fish simultaneously.
Author : Harry D. Kennedy,Lafayette L. Eller,David F. Walsh
Publisher : Unknown
Page : 22 pages
File Size : 49,5 Mb
Release : 1970
Category : Aquatic invertebrates
ISBN : UOM:39015086512160
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 : Stephen Spotte
Publisher : Unknown
Page : 230 pages
File Size : 41,8 Mb
Release : 2007
Category : Nature
ISBN : UCSD:31822034723189
Author : Anonim
Publisher : Unknown
Page : 766 pages
File Size : 41,8 Mb
Release : 1975
Category : Electronic
ISBN : STANFORD:36105026313986
Author : U.S. Fish and Wildlife Service
Publisher : Unknown
Page : 824 pages
File Size : 52,5 Mb
Release : 1972
Category : Fish culture
ISBN : UOM:39015041152938
Author : Anonim
Publisher : Unknown
Page : 372 pages
File Size : 51,9 Mb
Release : 1998
Category : Fish culture
ISBN : UCSD:31822009141938
Author : United States. Bureau of Sport Fisheries and Wildlife
Publisher : Unknown
Page : 674 pages
File Size : 41,5 Mb
Release : 1966
Category : Fish culture
ISBN : STANFORD:36105113703339
Author : Jay Stauffer
Publisher : Academy of Natural Sciences
Page : 404 pages
File Size : 53,5 Mb
Release : 2007-12
Category : Electronic
ISBN : 1422317838
This comprehensive work on the fishes of WV is the culmination of more than 20 years of res. Contains descriptions of the major river drainages in WV, a brief discussion of the zoogeog. of the fishes within the state, a table of fish dist. by drainage, a guide to the anatomical features used in fish ident., dichotomous keys to the families & species of WV fishes, physical descriptions of all fish species known or expected to occur in the state, & a glossary to supplement the species descriptions. Info. was gathered by: All major fish museums in the eastern U.S. were contacted & records of specimens collected were requested; museums with significant holdings of WV fishes were visited; & New fish surveys were conducted at approx. 1,000 sites throughout the state. Illus.
Author : Brian Joe Lobley Berry,Frank Freese,Henry Shepherd,John A. Baker,Philip Berry Dowden,Ralph Rudolph Botts,Walter Ernest Fleming,William John Zaumeyer,Herbert Rex Thomas
Publisher : Unknown
Page : 1094 pages
File Size : 43,9 Mb
Release : 1962
Category : Administrative agencies
ISBN : UIUC:30112019247912
Author : E.O. Gangstad
Publisher : CRC Press
Page : 319 pages
File Size : 42,8 Mb
Release : 2018-05-04
Category : Science
ISBN : 9781351086141
This volume includes measures of control of aquatic vegetation that harms human health, since water-related diseases exist in this environment. Although malaria has receded internationally due to the combined chemotherapeutic-insecticidal programs, recently it has resisted both medicines and insecticide control. Active malaria cases in the U.S. were fewer than a dozen before the Vietnam War, but in 1973 the figure was ab out 700, almost all traceable to returning military personnel. The disease could again become prevalent. Other diseases exist whose transmission is indirectly affected by aquatic weed conditions including filariasis, and various trematodiases, especially from the schistosomes, Chinese liver fluke, cattle liver fluke, Guinea worm, giant intestinal fluke, Asiatic lung fluke, and broad tapeworm. Waterweeds also support disease-pest arthropods, i.e., snipe flies, tabanids (horse, gad, deer, and greenheads), Clear Lake gnats, Mayflies, black flies, sandflies, and sewage flies.Ecosystem studies of impounded water research and development of herbivorous fish, and utilization of herbivorous fish in China, are also included in this volume.
Author : Anonim
Publisher : Unknown
Page : 132 pages
File Size : 43,8 Mb
Release : 1973
Category : Ecology
ISBN : OSU:32435020495313
Author : Charles A. Simenstad,Gregor M. Cailliet
Publisher : Springer Science & Business Media
Page : 334 pages
File Size : 40,7 Mb
Release : 2013-11-11
Category : Science
ISBN : 9789401711586
GUTSHOP '84 was the fourth in a series of workshops on various aspects of fish feeding (Table 1). Initially, the organizers merely invited regional (Pacific Northwest) fisheries scientists to share, and possibly develop mutual solutions to, the many technical problems associated with trying to obtain meaningful, quantitative information from fish stomach contents, and the subsequent statistical treatment and interpretation of the multivariate data. Since then, although not explicitly based upon any internal cycle, these scientists and increasingly more and more dispersed colleagues continued to congregate for workshop deliberations every two or three years. From the 49 attendees at the first workshop, the number of participants had grown to 65 at GUTSHOP '78, and 107 at GUTSHOP '81. By the third workshop, we were drawing scientists from across the U. S. and Canada, and from as far away as Norway. The topical content of the workshops has also evolved from the predominantly technical aspects of fish collection and stomach contents processing techniques, statistical analysis, and data manipulation and presentation to considerations of theoretical ecology, bioenergetics, and behavior.
Author : Anonim
Publisher : Unknown
Page : 400 pages
File Size : 40,6 Mb
Release : 1966
Category : Agriculture
ISBN : OSU:32435055054951
Set includes revised editions of some issues.
