G. L. Beggs

Ministry of Natural Resources and Forestry

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John M. Gunn

Laurentian University

D. L. Wales

Ministry of Natural Resources and Forestry

E. J. Grossman

Illinois Department of Public Health

James G. Hamilton

Lancaster University

Lori E. MacKay

Ministry of Natural Resources and Forestry

G. M. Booth

W. A. Scheider

Ministry of the Environment, Conservation and Parks

G. F. Holeton

Max Planck Institute of Experimental Medicine

Patricia E. Dimond

John E. Matuszek

Ministry of Natural Resources and Forestry

Cooperative Institutions

Ministry of Natural Resources and Forestry

University of Toronto

Ministry of the Environment, Conservation and Parks

Queen's University

University of Manchester

Illinois Department of Public Health

University of Illinois Urbana-Champaign

University of Illinois Chicago

University of California, Los Angeles

Department of Physiological Sciences

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Fish Species Richness in Relation to Lake Area, pH, and Other Abiotic Factors in Ontario Lakes

Canadian Journal of Fisheries and Aquatic Sciences (1988)

John E. Matuszek G. L. Beggs

Survey data from 2931 Ontario lakes were analyzed to determine how fish species richness was empirically related to a set of 19 physical and chemical limnological variables. Lake area was the dominant factor, explaining 18% of the variation in species number. Total aluminum, latitude, dissolved organic carbon, and elevation together explained an additional 16%. The strong relationship between species number and lake area was quantified using lakes with pH [Formula: see text] and then applied to ail the surveyed lakes to estimate species number. Deviations from the expected values indicated that species number decreased with decreasing pH below 6.0, resulting in significantly fewer species in lakes with pH < 6.0. In the subset of lakes with pH < 6.0, pH alone explained 21% of the variation in species number; elevation, lake area, and dissolved organic carbon together explained an additional 20%. Interactions between pH and lake area were identified; lake size decreased significantly both at low pH (<6.8) and at high pH [Formula: see text]. An understanding of these interactions was essential in explaining the relative roles of pH and lake area in determining species richness.

Global biodiversity

10.1139/f88-225

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Citations (107)

Survival, Growth, and Reproduction of Lake Trout (Salvelinus namaycush) and Yellow Perch (Perca flavescens) after Neutralization of an Acidic Lake Near Sudbury Ontario

Canadian Journal of Fisheries and Aquatic Sciences (1990)

John M. Gunn James G. Hamilton G. M. Booth C. D. Wren G. L. Beggs

Bowland Lake, an acidified lake (pH 4.8–5.2), was treated with calcite (CaCO 3 ) in 1983. Neutralization allowed for successful reproduction by reintroduced lake trout (Salvelinus namaycush). Mortality of lake trout embryos and juveniles in field toxicity tests decreased from 52–99% preneutralization to 0–30% postneutralization. The resident yellow perch (Perca flavescens) appeared unaffected by the chemical treatment. Both inter- and intra-specific competition were evident in the growth and body condition of perch and stocked lake trout in the years after neutralization. Springtime acid episodes continued to occur in the nearshore areas after the lake was neutralized, but no adverse effects on fish species were detected.

Fontinalis

10.1139/f90-048

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Citations (31)

Some physiological consequences of angling stress in muskellunge, Esox masquinongy Mitchill

Journal of Fish Biology (1980)

G. L. Beggs G. F. Holeton E. J. Grossman

Capture of muskellunge by angling resulted in a reduction of blood pH, elevated lactic acid concentrations, and a drop in total carbon dioxide and bicarbonate concentrations. The acidaemia was most severe immediately after capture and began to decline well before the blood lactate levels rose. Blood lactate levels were not as high as those characterizing fatigue in most other species. Recovery from the acidosis required 12 to 18 h and was accompanied by declines of 22% and 40% in haemoglobin and haematocrit levels respectively. With the exception of dying fish, there were only slight fluctuations in plasma sodium and potassium levels during recovery, indicating that there was no severe ionoregulatory dysfunction. Thirty per cent of all angled muskellunge died. The last stages immediately preceding death were characterized by declining blood pH and elevated potassium levels.

Bicarbonate

Esox

Sodium bicarbonate

10.1111/j.1095-8649.1980.tb02798.x

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Citations (59)

Fish Species Distribution in Relation to Lake Acidity in Ontario

Springer eBooks (1986)

D. L. Wales G. L. Beggs

Notropis

Stizostedion

Catostomus

Esox

Coregonus clupeaformis

Pimephales promelas

Fontinalis

Phoxinus

10.1007/978-94-009-3385-9_60

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Citations (12)

Relationship of Mercury Concentrations in Lake Trout (Salvelinus namaycush) and Smallmouth Bass (Micropterus dolomieui) to the Physical and Chemical Characteristics of Ontario Lakes

Canadian Journal of Fisheries and Aquatic Sciences (1989)

Michael J. McMurtry D. L. Wales W. A. Scheider G. L. Beggs Patricia E. Dimond

Concentrations of mercury in dorsal muscle tissue of lake trout (Salvelinus namaycush) from Ontario lakes were positively correlated with variables indicating lake dystrophy (dissolved organic carbon, colour, iron, transparency) and were also correlated with watershed area and lake area. Stepwise multiple regression selected dissolved organic carbon as the only variable which explained a significant amount of variation (37%) in mercury concentrations in lake trout. The relationship between dissolved organic carbon and mercury appeared to be strongest in the group of lakes with values of dissolved organic carbon less than 4.0 mg∙L −1 . In contrast, mercury concentrations in smallmouth bass (Micropterus dolomieui) were correlated with variables reflecting both water hardness (magnesium, calcium, conductivity) and acidity (pH, alkalinity). The relationship was inverse for the water hardness variables and positive for acidity. Stepwise regression identified three variables significant in explaining variation in mercury in smallmouth bass: calcium, dissolved organic carbon, and latitude. Mechanisms that may explain the effects of organic matter, water hardness, and acidity on mercury accumulation by fish are discussed.

Mercury

Alkalinity

10.1139/f89-057

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Citations (138)

Response of Lake Trout (Salvelinus namaycush) and Brook Trout (S. fontinalis) to Surface Water Acidification in Ontario

Springer eBooks (1986)

G. L. Beggs John M. Gunn

Fontinalis

10.1007/978-94-009-3385-9_73

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Citations (34)

Fish species distribution in relation to lake acidity in Ontario

Water Air & Soil Pollution (1986)

D. L. Wales G. L. Beggs

Notropis

Stizostedion

Catostomus

Esox

Coregonus clupeaformis

Pimephales promelas

Fontinalis

Phoxinus

Coregonus

10.1007/bf00303323

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Citations (10)

Long-term Monitoring of Fish Communities in Acid Sensitive Lakes in Ontario

Lake and Reservoir Management (1988)

John M. Gunn Lori E. MacKay Lois I. Deacon Theodor J. Stewart Frank J. Hicks

ABSTRACT A monitoring program began in 1982 to establish baseline data from which to assess long-term effects of acid deposition on fish communities in 20 low alkalinity (0–2.6 mg/L) lakes in south-central Ontario. The study lakes were all clear (dissolved organic carbon < 4 mg/L and dilute conductivity > 35 μS/cm), but differed in size (11–607 ha) and fish community composition (2 to 18 species). Monitoring included assessment of fish species presence, abundance, age composition, growth, recruitment, and angler harvest. Field toxicity tests were used to test the direct toxicity of lake or runoff water to sensitive life stages of various indigenous fish species. A description of the sampling procedures and some current findings from this ongoing study are presented.

Alkalinity

10.1080/07438148809354387

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Citations (5)

Response of lake trout (Salvelinus namaycush) and brook trout (S. fontinalis) to surface water acidification in Ontario

Water Air & Soil Pollution (1986)

G. L. Beggs John M. Gunn

Fontinalis

Alkalinity

10.1007/bf00303336

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Citations (42)