Publications
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Filter Total Items: 2570
Dentition throughout the life history of the landlocked sea lamprey, Petromyzon marinus
No abstract available.
Authors
Patrick J. Manion, George W. Piavis
Establishment of white perch, Morone americana, in Lake Erie
White perch, Morone americana, was first reported in Lake Erie in 1953. No further reports of capture were recorded until 1973, when one fish was taken. Three other captures were confirmed in 1974, and 34 in 1975. All but 3 of the 38 specimens were taken in the warm, shallow western basin and the extreme eastern end of the central basin. The widespread distribution and the sizable numbers of speci
Authors
Wolf-Dieter N. Busch, David H. Davies, Stephen J. Nepszy
Abnormal tooth development in a sea lamprey
Sea lampreys en route to their spawning grounds have been captured at mechanical or electrical structures that have been in operation for 1 to 27 spawning seasons (1949-75) on some 167 tributaries of the upper Great Lakes; more than 750,000 were taken in 1949-70 (Smith 1971). Among these lampreys (all of which were routinely examined at the time of capture) was one female (length, 434 mm; weight,
Authors
Patrick J. Manion, Lee H. Hanson
Verification of a model for predicting the effect of inconstant temperature on embryonic development of lake whitefish (Coregonus clupeaformis)
Eggs stripped from lake whitefish (Coregonus clupeaformis) spawning in Lake Michigan were incubated in the laboratory at temperatures similar to those on whitefish spawning grounds in Lake Michigan during December-April. Observed times from fertilization to attainment of each of 21 developmental stages were used to test a model that predicts the rate of development at daily fluctuating temperature
Authors
William H. Berlin, L.T. Brooke, Linda J. Stone
Abundance, composition, and distribution of crustacean zooplankton in relation to hypolimnetic oxygen depletion in west-central Lake Erie
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, a
Authors
Roy F. Heberger, James B. Reynolds
Acute toxic effects of two lampricides on twenty-one freshwater invertebrates
We conducted laboratory static bioassays to determine acute toxicity of two lampricides -- a 70% 2-aminoethanol salt of 5,2'dichloro-4'-nitrosalicylanilide (Bayer 73) and a mixture containing 98% 3-trifluoromethyl-4-nitrophenol (TFM) and 2% Bayer 73 (TFM-2B) -- to 21 freshwater invertebrates. LC50 values were determined for 24-h exposure periods at 12.8 C. Organisms relatively sensitive to Bayer 7
Authors
Robert P. Rye, Everett Louis King
Allantoinase in the marine polychaete Eudistylia vancouveri
Allantoinase, an enzyme in the purine-urea cycle, was found in Eudistylia vancouveri (Polychaeta). The enzyme had a pH optimum at 7.6. The Km was 0.012 M allantoin, and the Arrhenius energy of activation was 12.6 to 14.6 kcal/mol.
Authors
Dora R. M. Passino, G.W. Brown
Retention of mercury in the muscle of yellow perch (Perca flavescens) and rock bass (Ambloplites rupestris)
Mercury-contaminated yellow perch (Perca flavescens) and rock bass (Ambloplites rupestris) were collected from Lake St. Clair and stocked in two earthen ponds in September 1970. Twenty-six months later, concentrations of total mercury in the fillets had declined 53% in the yellow perch and 59% in the rock bass; however, the mean weight of the fish increased 88 and 183%, respectively, during the sa
Authors
Percy W. Laarman, Wayne A. Willford, James R. Olson
Temperature tolerance of young-of-the-year lake whitefish, Coregonus clupeaformis
The ultimate upper lethal temperature of young-of-the-year lake whitefish, Coregonus clupeaformis, was 26.65 C; this value is closely similar to that reported for yearling bloaters,Coregonus hoyi (26.75 C) and young-of-the-year lake herring, Coregonus artedii (26.0 C).
Authors
Thomas A. Edsall, Donald V. Rottiers
Ecology of mangroves in the Jewfish Chain, Exuma, Bahamas
The structure and function of mangrove communities in the Jewfish Chain, Exumas, Bahamas, were investigated for 3-1/2 years. Mangrove vegetation in the Jewfish Chain is similar to that in all the Caribbean-Florida area; Rhizophora mangle L. dominates and is interspersed with Avicennia germinans (L.) Lamk. and Laguncularia racemosa (L.) Gaertn. There is no apparent zonation of these three species.
Authors
L. V. Wilcox, Thomas G. Yocom, A. M. Forbes
Electric power generation and its influence on Great Lakes fish
No abstract available.
Authors
Thomas A. Edsall
Energy-related research of the U. S. Fish and Wildlife Service on the Great Lakes
No abstract available.
Authors
Thomas G. Yocom, Howard D. Tait