Effect of heat inactivation of lipoxygenase on lipid oxidation in lake herring (coregonus artedii)

1991 ◽  
Vol 68 (10) ◽  
pp. 752-757 ◽  
Author(s):  
Ya-Jane Wang ◽  
Lynne A. Miller ◽  
Paul B. Addis
Keyword(s):  
Lipid Oxidation ◽  
Heat Inactivation ◽  
Coregonus Artedii ◽  
Lake Herring

Acidification of the La Cloche Mountain Lakes, Ontario, and Resulting Fish Mortalities

1972 ◽  
Vol 29 (8) ◽  
pp. 1131-1143 ◽  
Author(s):  
Richard J. Beamish ◽  
Harold H. Harvey
Keyword(s):  
Sulfur Dioxide ◽  
Lake Trout ◽  
Salvelinus Namaycush ◽  
Mountain Lakes ◽  
Single Source ◽  
Catostomus Commersoni ◽  
General Study ◽  
Ph Measurements ◽  
Coregonus Artedii ◽  
Lake Herring

The loss of populations of lake trout (Salvelinus namaycush), lake herring (Coregonus artedii), white suckers (Catostomus commersoni), and other fishes in Lumsden Lake was attributed to increasing levels of acidity within the lake. An absence of fishes was also observed in nearby lakes. In some lakes, acid levels have increased more than one hundredfold in the last decade. The increases in acidity appear to result from acid fallout in rain and snow. The largest single source of this acid was considered to be the sulfur dioxide emitted by the metal smelters of Sudbury, Ont.In 1971, pH measurements were taken from 150 lakes in the general study area 65 km southwest of Sudbury. Some 33 of these lakes showed a pH of less than 4.5 and were described as "critically acidic." An additional 37 lakes had a pH in the range of 4.5–5.5 and were termed "endangered" lakes.

Effects of Temperature on Embryonic Development of Lake Herring (Coregonus artedii)

1973 ◽  
Vol 30 (6) ◽  
pp. 799-810 ◽  
Author(s):  
Peter J. Colby ◽  
L. T. Brooke
Keyword(s):  
Embryonic Development ◽  
Development Stage ◽  
General Assumption ◽  
Hatching Time ◽  
First Feeding ◽  
Stage Of Development ◽  
Coregonus Artedii ◽  
Washtenaw County ◽  
Time Required ◽  
Lake Herring

Embryonic development of lake herring (Coregonus artedii) was observed in the laboratory at 13 constant temperatures from 0.0 to 12.1 C and in Pickerel Lake (Washtenaw County, Michigan) at natural temperature regimes. Rate of development during incubation was based on progression of the embryos through 20 identifiable stages.An equation was derived to predict development stage at constant temperatures, on the general assumption that development stage [Formula: see text] is a function of time (days, D) and temperature (T). The equation should also be useful in interpreting estimates from future regressions that include other environmental variables that affect egg development.A second regression model, derived primarily for fluctuating temperatures, related development rate for stage [Formula: see text], expressed as the reciprocal of time, to temperature (x). The generalized equation for a development stage is:[Formula: see text]In general, time required for embryos to reach each stage of development in Pickerel Lake agreed closely with the time predicted from this equation, derived from our laboratory observations. Hatching time was predicted within 1 day in 1969 and within 2 days in 1970.We used the equations derived with the second model to predict the effect of the super-imposition of temperature increases of 1 and 2 C on the measured temperatures in Pickerel Lake. Conceivably, hatching dates could be affected sufficiently to jeopardize the first feeding of lake herring through loss of harmony between hatching date and seasonal food availability.

Precision Micrometer Measurement of Mouth Gape of Larval Fish

1987 ◽  
Vol 44 (10) ◽  
pp. 1786-1791 ◽  
Author(s):  
Michael T. Arts ◽  
D. O. Evans
Keyword(s):  
Body Size ◽  
Yellow Perch ◽  
Larval Fish ◽  
Perca Flavescens ◽  
Data Capture ◽  
Coregonus Clupeaformis ◽  
Manual Method ◽  
Direct Data ◽  
Coregonus Artedii ◽  
Lake Herring

A precision micrometer device is described which standardizes measurement of mouth gape of larval fish and provides a greater degree of accuracy and speed than the conventional manual method. We compared gape measurements of larval lake whitefish (Coregonus clupeaformis) and lake herring (Coregonus artedii) using the gape micrometer versus the manual method. The micrometer measurements revealed a greater increase in gape with body length and resulted in a greater proportion of the variance in gape being explained, indicating that the gape micrometer is more sensitive and accurate than the manual method. Coefficient of variation of gape measurements on 238 larval yellow perch (Perca flavescens) decreased with body size from 0.5–4.0% at 0.8–1.2 cm standard length to 0.2–0.5% at 3.0 cm. The device has the added advantage that it could be adapted to connect to a microcomputer for direct data capture.

Decline of Lake Herring (Coregonus artedii) In Lake Superior: An Analysis of the Wisconsin Herring Fishery, 1936–78

1982 ◽  
Vol 39 (4) ◽  
pp. 554-563 ◽  
Author(s):  
James H. Selgeby
Keyword(s):  
Lake Superior ◽  
Commercial Fishing ◽  
Productive Capacity ◽  
Spawning Areas ◽  
Spawning Stock ◽  
Coregonus Artedii ◽  
The 1960S ◽  
Lake Herring

Annual harvests of lake herring (Coregonus artedii) in American waters of Lake Superior declined from an average of 2 million kg in 1936–62 to less than 25 000 kg in 1978. Analysis of commercial fishing records revealed that the sequential overexploitation of discrete unit stocks caused the collapse of the herring population in Wisconsin waters. In each of six major spawning areas, catch exceeded the productive capacity of the stock and the stock failed. Because stocks in the six areas were exploited sequentially, mostly in groups of two or three simultaneously, the demise of the stocks was not readily apparent until the last two failed in the early 1960s. After the collapse of the last major spawning stock, the fishery dwindled but may have continued to overexploit the remaining small stocks. The residual populations were apparently able only to replace themselves. Some form of density-independent mortality was apparently operating to prevent their recovery during the 1960s and 1970s.Key words: lake herring, overfishing, Lake Superior

Genetics of Glycerol-3-phosphate Dehydrogenase Isozymes in White Muscle of Lake Whitefish (Coregonus clupeaformis)

1973 ◽  
Vol 30 (2) ◽  
pp. 187-193 ◽  
Author(s):  
J. W. Clayton ◽  
W. G. Franzin ◽  
D. N. Tretiak
Keyword(s):  
White Muscle ◽  
Natural Populations ◽  
Heat Inactivation ◽  
Starch Gel Electrophoresis ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Red Muscle ◽  
Catalytically Active ◽  
Coregonus Artedii ◽  
Glycerol 3 Phosphate Dehydrogenase

Multiple isozymes of glycerol-3-phosphate dehydrogenase (L-gIycerol-3-phosphate: NAD oxidoreductase, E. C. 1.1.1.8) have been resolved by starch gel electrophoresis of extracts of muscle tissue from lake whitefish (Coregonus clupeaformis). The isozyme electropherograms show that three kinds of subunit, A, B, and C, are synthesized in red muscle and two of these, A and B, are also found in white muscle. In red muscle the subunits evidently combine to form catalytically active dimers of the following types: AA, AB, BB, BC, and CC. In white muscle only the AA, AB, and BB dimers were observed.A genetic and molecular structure model is proposed for the glycerol-3-phosphate dehydrogenase (G-3-PDH) isozymes in white muscle of lake whitefish. On the basis of two alleles for A subunits and three alleles for B subunits, the model predicts a total of 18 distinct, electrophoretic G-3-PDH phenotypes for all possible AA, AB, and BB dimeric isozymes. The model has been confirmed by the results of a breeding experiment that tested the heritability of each of the five known alleles. A difference in the rate of heat inactivation of AA and BB isozymes was also interpreted as additional evidence for the unique genetic and molecular nature of the two kinds of subunits.Surveys of natural populations of lake whitefish revealed some marked variations in the frequencies of G-3-PDH alleles in fish from different geographical areas.The cisco (Coregonus artedii) also appears to have three "b" alleles for G-3-PDH.

Biomass Dynamics of Lake Superior Lake Herring (Coregonus artedii): Application of Schnute's Difference Model

1987 ◽  
Vol 44 (S2) ◽  
pp. s275-s288 ◽  
Author(s):  
Lawrence D. Jacobson ◽  
Wayne R. MacCallum ◽  
George R. Spangler
Keyword(s):  
General Trend ◽  
Lake Superior ◽  
Fishing Effort ◽  
Natural Mortality ◽  
Difference Model ◽  
Gill Nets ◽  
Thunder Bay ◽  
Biomass Dynamics ◽  
Coregonus Artedii ◽  
Lake Herring

Schnute's (1985. Can. J. Fish. Aquat. Sci. 42: 414–429) difference model was used to study the biomass dynamics of lake herring (Coregonus artedii) in Thunder Bay and Black Bay, Lake Superior, during 1948–79. Recruitment to both fisheries appeared to be independent of escapement during previous years. Abundance of lake herring in Black Bay varied without trend during the study period despite a strong peak in effective fishing effort during 1968–70 and a general trend of increasing effort throughout the study period. Abundance of Thunder Bay lake herring declined during 1948–50 and 1959–67 and increased when fishing effort declined. The estimated catchability coefficient for small-mesh gill nets (54–83 mm stretched measure) set in Black Bay for lake herring during November was 0.467/102 km net. The estimated catchability coefficient for small mesh gill nets set in Thunder Bay for lake herring during December was 0.132/102 km net. Estimates of natural mortality rates and recruitment levels for both fisheries were confounded and unreliable. This analysis demonstrates the utility of Schnute's model for management of Great Lakes herring stocks and some difficulties with its application.

Sign in / Sign up

Export Citation Format

Share Document