Waterbird Predation on Fish in Western Lake Erie: A Bioenergetics Model Application

The Condor ◽  
1995 ◽  
Vol 97 (1) ◽  
pp. 141-153 ◽  
Author(s):  
Charles P. Madenjian ◽  
Steven W. Gabrey
1995 ◽  
Vol 52 (2) ◽  
pp. 381-390 ◽  
Author(s):  
Charles P. Madenjian

A bioenergetics model for growth of a zebra mussel (Dreissena polymorpha) individual was verified with observations on zebra mussel growth in western Lake Erie. The bioenergetics model was then applied to the zebra mussel population in the western basin of Lake Erie to estimate the removal of phytoplankton by mussels. According to the modeling results, the zebra mussel population consumed 5.0 million tonnes of phytoplankton, while 1.4 million tonnes of phytoplankton was deposited in pseudofeces from the mussels. Thus, a total of 6.4 ± 2.4 million tonnes of phytoplankton was removed from the water column by zebra mussel in western Lake Erie during 1990. Primary production was estimated to be 24.8 million tonnes; therefore, zebra mussel removed the equivalent of 26 ± 10% of the primary production for western Lake Erie.


1998 ◽  
Vol 32 (24) ◽  
pp. 3862-3867 ◽  
Author(s):  
Heather A. Morrison ◽  
Frank A. P. C. Gobas ◽  
Rodica Lazar ◽  
D. Michael Whittle ◽  
G. Douglas Haffner

1975 ◽  
Vol 32 (10) ◽  
pp. 1733-1743 ◽  
Author(s):  
Wolf-Dieter N. Busch ◽  
Russell L. Scholl ◽  
Wilbur L. Hartman

Commercial production of walleyes (Stizostedion vitreum vitreum) from western Lake Erie declined from 5.9 million pounds in 1956 to 140,000 pounds by 1969. Since 1956, marked irregularity in year-class success has developed. Only four year-classes were considered good during 1959–70. The rate and regularity of water warming during the spring spawning and incubation periods in 1960–70 had a positive effect on the density of egg deposits and the resulting year-class strength. Rates of warming were not themselves detrimental, but rather the extended length of the incubation period in cool springs increased the exposure of eggs to such negative influences as dislodgment from the spawning reefs by strong current action generated by spring storms, or siltation and low oxygen tensions. The annual brood stock size had much less influence on year-class strength than did water temperature. Reproductive success was unrelated to fluctuations in size of suitable reef spawning area caused by changes in water level. Apparently the usable spawning area at any water level is more than adequate to serve the limited walleye brood stocks.


2013 ◽  
Vol 39 (3) ◽  
pp. 449-454 ◽  
Author(s):  
Nick J. Bryan ◽  
Christina V. Florence ◽  
Todd D. Crail ◽  
Daryl L. Moorhead

2013 ◽  
Vol 39 (1) ◽  
pp. 83-89 ◽  
Author(s):  
Thomas B. Bridgeman ◽  
Justin D. Chaffin ◽  
Jesse E. Filbrun

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