Walleye

FIGURE 3.1 Observed mercury concentrations in standardized 50-cm walleye from Clay Lake, Ontario (1970-1983) following reductions in mercury releases from an upstream chlor-aUcali facility. (Source Data from Parks and Hamilton 1987.)... 

FIGURE 4.3 Recent changes in concentrations of total mercury in axial muscle of walleyes from 13 boreal lakes in northwestern Ontario and Manitoba, Canada. Standardized concentrations for 50-cm walleye sampled during 1996-2000 are plotted against standardized concentrations for fish sampled during 1977-1983 (data are for reference lakes reported in Johnston et al. 2003). Each point below the diagonal line, which has a slope of 1.0, represents a lake where the standardized concentration declined between the 2 sampling intervals. 

Colby PJ, McNicol RE, Ryder RA. 1979. Synopsis ofbiological data on the walleye Shzo5te-dion vitrem vitreum (MhchiU 1818). Rome, Italy Food and Agiicultme Organization of the United Nations. FAO Fisheries Synopsis No 119. 139 p. 

Latif MA, Bodaly RA, Johnston TA, Fudge RJP. 2001. Effects of environmental and maternally derived methylmercury on the embryonic and larval stages of walleye (Stizoste-dion vitreum). Environ Pollut 111 139-148. 

Simoneau M, Lucotte M, Garceau S, Laliberte D. 2005. Fish growth rates modulate mercury concentrations in walleye Sander vitreus) from eastern Canadian lakes. Environ Res 98 73-82. 

Thyroxine (T4) and Triiodothyroxine (T3) Plasma Plasma Walleye Yes Suppressed Friedmann et al. (1996) Bleau et al. (1996)... 

Testicular atrophy Testes Walleye No Increased Friedmann et al. 

Fiiedmaim AS, Watzin MC, Brinck-Johnsen T, Letter JC. 1996. Low levels of dietary methyl-mercury inhibit growth and gonadal development in juveiule walleye Stizostedion vitreum). Aquat Toxicol 35 265-278. 

P. Walley, Measures of uncertainty in expert systems. Artif. Intell., 83 (1) (1996) 1-58. 

H20. Herbertson, M. J., Werner, H. A., and Walley, K. R., Nitric oxide synthase inhibition partially prevents decreased LV contractility during endotoxemia. Am. J. Physiol. 270, HI979-HI984 (1996). 

Instead of using a constant value of the mass transfer coefficient k at each pressure given by Harwell (Walley et al., 1973), Levy and Healzer (1980) developed an entrainment parameter p. GF and P are evaluated by solving the following two equations simultaneously ... 

Walley, T. (1998), Prescription charges change overdue , British Medical Journal, 317, 487-8. 

Studies of 30 to 60 days duration with three comparatively sensitive species of freshwater fishes demonstrated that concentrations of >1 and <3 pg Cd/L in water of low alkalinity caused reductions in growth, survival, and fecundity of brook trout (Salvelinusfontinalis), the most sensitive species tested (Table 1.3). Under conditions of increasing alkalinity, the maximum allowable cadmium concentration range for brook trout increased to >7 and <12 pg/L a similar case was made for the walleye (Stizostedion vitreum vitreum Table 1.3). 

Statewide survey, 1991, retail markets Walleye, Stizostedion vitreum vitreum 1.5 FW 77... 

Gerstenberger, S.L., J. Pratt-Shelley, M.S. Beattie, and J.A. Dellinger. 1993. Mercury concentrations of walleye (,Stizostedion vitreum vitreum) in 34 northern Wisconsin lakes. Bull. Environ. Contam. Toxicol. 50 612-617, Gilbert, S.G., C.D. Munkers, T.M. Burbacher, and D.C. Rice. 1994. Effects of in utero methylmercury exposure on schedule controlled behavior in adult monkeys. Amer. Jour. Primatol. 33 211. 

Lathrop, R.C., P.W. Rasmussen, and D.R. Knauer. 1991. Mercury concentrations in walleyes from Wisconsin (USA) lakes. Water Air Soil Pollut. 56 295-307. 

Munn, M.D. and T.M. Short. 1997. Spatial heterogeneity of mercury bioaccumulation by walleye in Franklin D. Roosevelt Lake and the upper Columbia River, Washington. Trans. Amer. Fish. Soc. 126 477-487. 

Wiener, J.G., R.E. Martini, T.B. Sheffy, and G.E. Glass. 1990b. Factors influencing mercury concentrations in walleyes in northern Wisconsin lakes. Trans. Amer. Fish. Soc. 119 862-870. 

Wren, C.D., W.A. Scheider, D.L. Wales, B.W. Muncaster, and I.M. Gray. 1991. Relation between mercury concentrations in walleye (Stizostedion vitreum vitreum) and northern pike (Esox lucius) in Ontario lakes and influence of environmental factors. Canad. Jour. Fish. Aquat. Sci. 48 132-139. 

Walleye pollack, Theragra chalcogramma, North Pacific Ocean, 1980-82, whole ... 

Zabik, M.E., M.J. Zabik, A.M. Booren, S. Daubenmire, M.A. Pascall, R. Welch, and H. Humphrey. 1995. Pesticides and total polychlorinated biphenyls residues in raw and cooked walleye and white bass harvested from the Great Lakes. Bull. Environ. Contam. Toxicol. 54 396-402. 

Bering Sea, August 1988 Walleye pollock, Theragra chalcogrammus, whole Lake Baikal, Russia, June 1991 0.013 FW 7... 

More often, fish gradually disappear from these waterways as their environment slowly becomes intolerable. Some kinds of fish such as smallmouth bass, walleye, brook trout and salmon, are more sensitive to acidity than others and tend to disappear first. 

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