4 edition of The growth and reproduction of lake whitefish (Coregonus clupeaformis) found in the catalog.
The growth and reproduction of lake whitefish (Coregonus clupeaformis)
Thesis (M.Sc.) -- University of Toronto, 2002.
|Series||Canadian theses = -- Th`eses canadiennes|
|The Physical Object|
|Pagination||2 microfiches : negative.|
composition, growth rate, and maturity. The present paper is a contribution to that vely little is known of the whitefish in Lake Superior. The only pl,lblished study on growth is thatof Edsall () on the unexploited stock of dwarf whitefish in Munising Bay. MATERIALS AND METHODS The present study is based on 1, whitefish. Below a photo of an algae bloom in Upper Whitefish in This got the attention of everyone trying to use this part of the lake. 1n conditions were better, with only a mild occurrence of increased vegetation, in a limited area, at the very end of the season.
The mountain whitefish is found in abundance in most clear, cold rivers in the western drainages and eastern mountain front of Montana. The typical mountain whitefish is a cylindrical inch fish, but they can reach a weight of 5 pounds. Trout fishermen frequently catch several whitefish for every trout taken. lake Michigan's tributary and nearshore fish habitats / Edward S. Rutherford --Impacts of recent invasive species on nearshore fisheries / John M. Dettmers [and others] --Lake whitefish / Mark Ebener [and others] --Yellow perch / Paul J. Allen and Brian Breidert --Status and trends of lake sturgeon / Robert F. Elliot --Status of planktivore.
Spawning occurs at night (Ref. , , ).A female and one or more males rise to the surface, release eggs and milt and descend separately toward the bottom (Ref. ).Spawning fish are very active and may leap completely out of the water (Ref. ).Breeds annually in the southern parts of the range, but only every other year or even every third year in the arctic and sub-arctic. Lake whitefish support the single largest and most valuable commercial fishery in the Laurentian Great Lakes. Recently, fishery managers have reported declining growth and productivity of lake whitefish in the upper Great Lakes. Several causes for the declines noted in individual growth rates have been proposed. These include changes in: (1) lake whitefish density, (2) food quality and.
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The lake whitefish (Coregonus clupeaformis) is a species of freshwater whitefish from North America. Lake whitefish are found throughout much of Canada and parts of the northern United States, including all of the Great lake whitefish is sometimes referred to as a "humpback" fish due to the small size of the head in relation to the length of the : Salmonidae.
Age, Growth and Maturity Lake whitefish are among Maine’s more long-lived sport fish, normally living 10 or more years and weighing pounds. The largest lake whitefish on record for Maine waters is a specimen weighing 7 pounds 8 ounces taken by an angler trolling a Mooselook wobbler at Sebago Lake.
The Lake Erie whitefish was a foot long in a little less than 2 years, 18 inches in about 4 years, and 2 feet in slightly under 12 years. At the end of 16 years the calculated length was inches. The calculated annual increments of growth in weight increased from pound in the first year to a maximum of pound in the third.
The focus of the study was to analyze the effects of the artificial reproduction of whitefish, Coregonus lavaretus (L.) aged from 1+ to 4+. It was confirmed that males comprised % of the brood. The following hypotheses were tested using data from female lake whitefish sampled from eight different stocks in lakes Erie, Michigan and Superior:  observed differences in growth (i.e., length-at-age) and reproduction (i.e., gonadosomatic index and fecundity) of lake whitefish among stocks were related to energy availability and quality (i Cited by: 2.
An index of pre-reproductive growth rate (ω) was calculated as the product of L H and k (Galucci and Quinn ). An empirical mea- Whitefish Growth and Maturation TABLE 1. Locations, latitudes, longitudes, years sampled, and sample sizes of lake whitefish stocks used to describe growth and maturity.
ary effects of size-selective fisheries in lake whitefish (Coregonus clupeaformis). Lake whitefish populations have long experienced fishing mor-tality and variable growth regimes.
In the Laurentian Great Lakes, lake whitefish support subsistence and commercial fisheries, and historically faced high exploitation rates in commercial gill net and.
Available data on mortality, growth, reproduction, and stock size in exploited and unexploited populations of lake whitefish (Coregonus clupeaformis) are reviewed with a view to understanding the dynamics of exploited populations and improving their l mortality ranged from about to in unexploited populations.
Though declines in the growth and condition of Great Lakes lake whitefish (Coregonus clupeaformis) have been largely attributed to food web disruptions caused by invasive dreissenid mussels, a comprehensive evaluation of alternative hypotheses is currently various statistical approaches, we evaluated 69 years of data from the inner basin of South Bay, Lake Huron.
Growth rate and reproduction of a brood stock of European whitefish (Coregonus lavaretus L.) from Lake Ga³aduœ under controlled rearing conditions Received – 05 November /Accepted – 20 January Published online: 30 March ; ©Inland Fisheries Institute in Olsztyn, Poland.
Lake whitefish is the most important fish species harvested in the commercial fisheries in the upper Great Lakes. Diporeia spp., a small, shrimp-like crustacean, was an important energy-rich prey resource for lake whitefish before their decline in lakes Michigan and Huron after the arrival of zebra and quagga mussels.
Both of these native species play an important role in the benthic food. The status of whitefish populations in two lakes outside the Great Lakes region (Lake Nipigon and Lake Winnipeg) was examined to provide a broader perspective. The commercial harvest in Lake Nipigon has remained remarkably stable over the past 70 years (R.
Salmon, Ontario Ministry of Natural Resources, P. BoxNipigon, ON P0T 2J0, unpubl. Understanding fish habitat use is important in determining conditions that ultimately affect fish energetics, growth and reproduction.
Great Lakes lake whitefish (Coregonus clupeaformis) have demonstrated dramatic changes in growth and life history traits since the appearance of dreissenid mussels in the Great Lakes, but the role of habitat occupancy in driving these changes is poorly understood.
Reproduction vs. growth: indications for altered energy fluxes in Lake Constance whitefish through size-selective fishery.
In: Advances in Limnology. In: Advances in Limnology. 63 (11), pp. Wabamun Lake (Alberta, Canada) has been subject to ongoing contamination with polycyclic aromatic hydrocarbons (PAHs) from multiple sources for decades and in August was exposed to ca. L of bunker C oil following a train derailment.
We compared the pattern, frequency, and severity of deformity in larvae of lake whitefish (Coregonus clupeaformis) incubated.
Growth and Reproduction. We believe that young sheefish hatch sometime in early spring before the winter ice breaks up. Rapidly flowing spring-melt water carries juvenile sheefish downstream.
The young fish end up in backwater eddies along the river, off-channel lakes, and estuary regions at river mouths. growth and body condition declined precipitously in northern Madenjianetal),Lake Huron(ModelingSubcommittee–TechnicalFisheriesCommittee ),andLakeOntario(Lumbetal).Incontrast,growthand growth, and reproduction (Bell and Sargent ; Sargent et al.
), immune responses (Arts and Kohler ), and survival. Reproduction vs. growth: indications for altered energy fluxes in Lake Constance whitefish through size-selective fishery Article (PDF Available) in Advances in Limnology January.
considerably larger. The largest lake whitefish on record for Maine waters is a specimen weighing seven pounds, eight ounces, taken by an angler from Sebago Lake in Reproduction Lake whitefish typically reach sexual maturity between ages three and six, and spawn between.
Lake Whitefish ecotypes are known to have the strongest reproductive barrier among all studied species-pairs of northern temperate fishes undergoing ecological speciation, and our results are consistent with the hypothesis that strong reproductive barriers are linked to the accumulation of adaptive genetic divergence between sympatric ecotypes.
remain until early December. Lake whitefish spawn over shoals (1 to 3 m of depth) consisting of boulder, cobble and gravel. Biology Lake Simcoe lake whitefish abundance declined dramatically in the s, largely as a result of recruitment failure.
Annual stocking of lake whitefish began in and.Growth and Reproduction. Broad whitefish mature at a late age as compared to other salmonids (members of the salmon family).
Most become mature between eight and ten years old. They live a long time; some reaching an age of 20+ years. Not all broad whitefish spawn every year. In some river systems, they spawn every other year or so.Lake whitefish (Coregonus clupeaformis), henceforth whitefish, have been a highly valued food resource in the Great Lakes for thousands of years (Ebener et al., ).
Unfortunately, whitefish populations suffered declines due to overexploitation, invasive species, and loss of spawning habitat.