Fecundity Comparisons for Various Stocks of Lake Whitefish, Coregonus clupeaformis

1975 ◽  
Vol 32 (3) ◽  
pp. 404-407 ◽  
Author(s):  
M. C. Healey ◽  
C. W. Nicol
Keyword(s):  
Northwest Territories ◽  
Lake Erie ◽  
Fork Length ◽  
Nonlinear Relationship ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Limited Data ◽  
Relative Fecundity ◽  
Great Slave Lake ◽  
The Relationship

We found no significant differences in slope or intercept for the regression of loge fecundity on loge fork length among samples of whitefish from four lakes near Yellowknife in the Northwest Territories. The equation describing the relationship between fecundity and fork length for these populations was:[Formula: see text]Five other populations for which length–fecundity relationships could be calculated had length exponents ranging from 3.20 to 4.38, suggesting a nonlinear relationship between weight and fecundity. Six of the nine populations as well as four others for which limited data were available all had similar relative fecundities. Fish from Buck Lake in Alberta and from Lake Erie had high relative fecundities while fish from Great Slave Lake had low relative fecundity.

The Lake Whitefish in Kerr Lake, New Brunswick

1952 ◽  
Vol 8c (5) ◽  
pp. 340-346 ◽  
Author(s):  
M. W. Smith
Keyword(s):  
New Brunswick ◽  
Fork Length ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Small Lake

Coregonus clupeaformis was taken in a small lake of southern New Brunswick. Although the species had not been known to occur in this region, this population is evidently indigenous. Fish of ages III–V were taken, the largest being 252 mm. in fork length.

Growth and Reproduction of the Lake Whitefish, Coregonus clupeaformis, in Lac la Ronge, Saskatchewan

1968 ◽  
Vol 25 (10) ◽  
pp. 2091-2100 ◽  
Author(s):  
S. U. Qadri
Keyword(s):  
North America ◽  
Sex Ratio ◽  
Life Span ◽  
Fork Length ◽  
Growing Season ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Young Fish ◽  
Large Lakes ◽  
Growth And Reproduction

In Lac la Ronge the lake whitefish (Coregonus clupeaformis (Mitchill)) spawned from late October until the middle of November at ages of 8 years and over. The growing season lasted from late May to early October and young fish grew faster than older ones and tended to have a longer growing season. Ages for 1604 fish taken during 4 years showed that they grew to a fork length of about 16 inches in 10 years, the rate being slower than for lake whitefish in other large lakes in North America. The length-weight relationships were linear: for the open lake, log W = 3.48 log L – 3.93, and for Hunter Bay, log W = 3.26 log L – 3.66. The males matured a little earlier than females and their life span was somewhat shorter. The sex ratio was approximately 1:1.

Spatial and temporal genetic diversity of lake whitefish (Coregonus clupeaformis (Mitchill)) from Lake Huron and Lake Erie

2013 ◽  
Vol 64 ◽  
pp. 205-222 ◽  
Author(s):  
Wendylee Stott ◽  
Mark P. Ebener ◽  
Lloyd Mohr ◽  
Travis Hartman ◽  
Jim Johnson ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Lake Erie ◽  
Lake Huron ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Temporal Genetic Diversity

Dynamics of An Exploited Population of Lake Whitefish (Coregonus clupeaformis) In Lake Huron

1983 ◽  
Vol 40 (10) ◽  
pp. 1556-1567 ◽  
Author(s):  
B. A. Henderson ◽  
J. J. Collins ◽  
J. A. Reckahn
Keyword(s):  
Fork Length ◽  
Lake Huron ◽  
Population Abundance ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Stock Size ◽  
Parental Stock ◽  
Intrinsic Mechanism ◽  
Class Strength ◽  
Population Sizes

A population of lake whitefish (Coregonus clupeaformis) in the waters off eastern Manitoulin Island in Lake Huron was sampled from 1950 to 1982 by an experimental pound net in the outer basin of South Bay. Year-class strength increased markedly from 1947 to 1977; the increase began with the decline of the 1943 year-class. The fork length attained by age 1–3 fish decreased during the study, but no trend was apparent for older fish. Natural mortality of year-classes varied considerably, and was probably related to the abundance of lamprey. The annual exploitation rate increased from 1 to 37% between 1960 and 1977. Year-class strength was not correlated with the thermal regime during spawning and hatching. Recruitment was a function of parental stock size, and there was evidence that survival from the egg to juvenile stage was inversely correlated with parental stock size. Instantaneous growth rates (G) during the 2nd year of growth were inversely related to year-class strength. Growth (G) in the 1st year was positively correlated with estimated surface water temperatures. The sizes attained by ages 2 and 3 were inversely related to total population abundance. Catchability coefficients in 144-mm-mesh gill nets were inversely related to estimated population sizes. An intrinsic mechanism of population regulation is proposed whereby recruitment is a function of parental stock size, juvenile survival is inversely related to stock size, and growth is inversely correlated with population abundance.

The Movement of Tagged Great Slave Lake Fish

1963 ◽  
Vol 20 (2) ◽  
pp. 319-326 ◽  
Author(s):  
J. J. Keleher
Keyword(s):  
Lake Trout ◽  
Directional Pattern ◽  
Fish Populations ◽  
Coregonus Clupeaformis ◽  
Commercial Fishery ◽  
Lake Whitefish ◽  
Great Slave Lake ◽  
Lake Fish

At Great Slave Lake, N.W.T., 3629 fish marked with Petersen tags were released during 5 years from 1946 to 1955. The time at large and movement of 505 recoveries, mostly lake whitefish, Coregonus clupeaformis, and lake trout, Cristivomer namaycush, are analyzed. Most of the tagged fish were caught in the summer commercial fishery; returns during the fall and winter were scarce. The median recapture time was 268 days; the maximum, for a lake trout, was 4027 days. Movement was generally limited; its median was 5 statute miles (8 km). A few fish travelled relatively long distances. There was no overall directional pattern to the movement, but some aggregation of the recaptured fish was noted. The fish populations are regarded as sedentary rather than mobile.

Evolution of Lake Whitefish (Coregonus clupeaformis) in North America during the Pleistocene: Evidence for a Nahanni Glacial Refuge Race in the Northern Cordillera Region

1992 ◽  
Vol 49 (4) ◽  
pp. 760-768 ◽  
Author(s):  
C. J. Foote ◽  
J. W. Clayton ◽  
C. C. Lindsey ◽  
R. A. Bodaly
Keyword(s):  
Northwest Territories ◽  
National Park ◽  
Yukon Territory ◽  
Glacial Refugium ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Geological Evidence ◽  
Athabasca River ◽  
Peace River ◽  
Glacial Refuge

Lake whitefish (Coregonus clupeaformis) could have survived through (at least) the Illinoisan and Wisconsinan Pleistocene glacial maxima in an area in the vicinity of the present Nahanni National Park in the Northwest Territories of Canada according to the geological evidence. This possibility was addressed by an analysis of the genetic makeup of 43 lake whitefish populations in the Northwest Territories, the Yukon Territory, British Columbia, and Alberta. Populations in the lower Liard, Tetcela, Fraser, and upper Peace River systems as well as the headwaters of the Athabasca River were distinguished from both the Bering glacial refuge race populations inhabiting the Yukon and upper Liard River basins in the Yukon Territory and the Mississippi–Missouri glacial refuge race populations inhabiting most of the Northwest Territories, Alberta, and areas further to the east by a specific combination of electrophoretic mobility alleles. This evidence supports the hypothesis of the survival and subsequent dispersal of lake whitefish from a Nahanni glacial refugium. Possible dispersal routes and the limited extent of introgression among races are discussed.

Growth, Maturity, Fecundity and Mortality in the Relatively Unexploited Whitefish, Coregonus clupeaformis, of Great Slave Lake

1953 ◽  
Vol 10 (7) ◽  
pp. 413-441 ◽  
Author(s):  
W. A. Kennedy
Keyword(s):  
Mortality Rate ◽  
Sex Ratio ◽  
Commercial Fishing ◽  
Coregonus Clupeaformis ◽  
Gill Nets ◽  
Weight Relationship ◽  
Great Slave Lake ◽  
Obvious Change ◽  
The Relationship ◽  
Annual Mortality

Ages were determined of 6,571 whitefish for which sizes were recorded. A length-weight relationship, the percentage of both sexes mature at each age, the sex ratio, the proportion of mature females that spawn annually and the relationship between size of fish and number of eggs were determined from smaller samples.Growth rate is difficult to assess because of net selection, but it seems to be slower than in more southerly lakes. Growth appears to be limited to the period June to September inclusive.The total annual mortality rate of 61 per cent represents the unexploited condition—four years of commercial fishing with 51/2-inch mesh gill-nets produced no obvious change. A moderate mortality rate acting at all ages will easily account for thousands of eggs being produced for every whitefish that survives to maturity—it is unnecessary to assume a low percentage of eggs fertilized or excessive mortality among fertilized eggs or among young fish.A more intensive fishery would probably increase sustained yield.

QUANTIFICATION OF TUNA FISH TARGET STRENGTH USING QUANTITATIVE ECHO SOUNDER

2009 ◽  
Vol 1 (1) ◽  
Author(s):  
Henry M. Manik
Keyword(s):  
Wave Reflection ◽  
Fork Length ◽  
Research Programme ◽  
Yellowfin Tuna ◽  
Target Strength ◽  
Bigeye Tuna ◽  
Tuna Fish ◽  
Thunnus Obesus ◽  
The Relationship ◽  
Echo Sounder

A preliminary research programme was carried out in order to study the acoustic wave reflection or target strength (TS) of tuna fish using a quantitative echo sounder (QES). The relationships between TS to fork length (FL) and swimbladder volume, for bigeye tuna (Thunnus obesus) and yellowfin tuna (T. albacares) are investigated. The TS of bigeye tuna was about 3 dB higher than yellowfin tuna when comparing species at the same size. The result can be correlated to the swimbladder volume differencebetween species. The relationship between TS and swimbladder volume was quantified for both species.Keywords: tuna fish, target strength, quantitative echo sounder

Sign in / Sign up

Export Citation Format

Share Document