Annotated List of Parasites of the Bluefish Pomatomus Saltatrix PDF Download
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Author: Herbert G. Anderson
Publisher:
ISBN:
Category : Bluefish
Languages : en
Pages : 16
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Book Description
In this study of bluefish on the Atlantic coast, 22 of the 31 previously recorded parasites of bluefish were observed and 6 not previously recorded -- a total of 37 parasites, 16 of frequent occurrence.
Author: Herbert G. Anderson
Publisher:
ISBN:
Category : Bluefish
Languages : en
Pages : 16
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Book Description
In this study of bluefish on the Atlantic coast, 22 of the 31 previously recorded parasites of bluefish were observed and 6 not previously recorded -- a total of 37 parasites, 16 of frequent occurrence.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 382
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Book Description
Author: Tom J. Timmons
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 10
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Book Description
The percentage body weight contributed by the ovaries and frequency distributions of ovarian egg diameters were reliable indicators of the spawning season of largemouth bass, in West Point Reservoir in 1977.
Author:
Publisher:
ISBN:
Category : Fish culture
Languages : en
Pages : 494
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Book Description
Author: D. F. Woodward
Publisher:
ISBN:
Category : Cutthroat trout
Languages : en
Pages : 12
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Book Description
Two formulations of the herbicide 2,4-D (2,4-dichlorophenoxyacetic acid) - the butyl ester (BE) and the propylene glycol butyl ether ester (PGBEE) -- had 96-h LC50's to cutthroat trout and lake trout ranging from 490 to 1,200 microgram/liter in static tests. A third formulation -- the isooctyl ester (IE) -- was not toxic to cutthroat trout or lake trout at concentrations below 60.000 microgram/liter. The butyl ester (2,4-D BE) was slightly more toxic than 2,4-D PGBEE, and the toxicity of both esters increased as water temperature decreased.
Author: Charles W. McAda
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 22
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Book Description
The razorback sucker, which has declined in abundance in the upper Colorado River primarily because of man's impact on the environment, has been recommended for listing as "threatened" in the U.S. Department of Interior's list of threatened or endangered species. During the present investigation, razorback suckers were nevertheless found in relatively large concentrations at two restricted locations -- the mouth of the Yampa River and a flooded gravel pit connected to the Colorado River near Grand Junction, Colorado.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 544
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Book Description
Author: LaRue Wells
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 20
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Book Description
Stomachs of 1,064 alewives, 1,103 yellow perch, 246 spottail shiners, 288 trout-perch, 454 slimy sculpins, and 562 fourhorn sculpins from Lake Michigan were examined for food contents. Fish were sampled primarily from March to November and nearly all were caught at the bottom in the southeastern part of the lake near Saugatuck, Michigan. Pontoporeia was the most commonly reprented food item in the stomach contents of the fish examined, with immature midges, Mysis (a type of freshwater shrimp), copepods, cladocerans, fingernail clams and crayfish also being represented. Different species consumed different proportions of foods. Zooplankton was the principle food of alewives and spottail shiners, but was also consumed in small quantities by yellow perch and trout perch. Mysis was important to fourhorn sculpins, in addition to Pontoporeia. Immature midges were a major portion of spottail shiners and trout perch, also being consumed by alewives. Fish were often the most important food of yellow perch in the largest size category. Crayfish were a sizable portion of the diet of yellow perch on rocky bottoms, but sparingly on smooth bottoms. Spottail shiners also ate substantial numbers of fingernail clams.
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 504
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Book Description
Author: W. Waynon Johnson
Publisher:
ISBN:
Category : Acute toxicity testing
Languages : en
Pages : 16
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Book Description
Toxicities of four chemical forest fire retardants, Fire-Trol 100 and 931 (ammonium sulfate, or polyphosphate with an attapulgit clay thickner) and Phos-Chek 202A and 259 (diammonium phosphate with guar gum derivative thickner) were determined by static and flow-through toxicity tests for fry and fingerling coho salmon and rainbow trout; fingerling fathead minnows, bluegills, and largemouth bass; and mature scuds. In static tests, Phos-Chek formulations were more toxic than either of the Fire-Trol formulations to scuds and all life stages of fish. In salmon and trout, fry were generally more susceptible than fingerlings to all formulations; yolk-sac fry were more susceptible than swim-up friy. Toxicities of all formulations to salmon and trout were similar at 6 to 11 degress centigrade. Un-ionized ammonia is believed to be the most toxic component of thes fire retardants.
