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Chronobiologic approach to aquaculture
N. C. Parker
1984, Transactions of the American Fisheries Society (113) 545-552
Diel and seasonal changes in the environment directly or indirectly control many biological functions. Chronobiology, the study of biological functions in relation to time of day, time of year, lunar phases, and other consistent cues, could have important applications in aquaculture. Physiological conditions that vary seasonally include feeding time, tolerance...
Contaminants
Wayne A. Willford
1984, Technical Report 40
No abstract available....
Availability of water from the alluvial aquifer in part of the Green River Valley, King County, Washington
W. E. Lum II, R. C. Alvord, B. W. Drost
1984, Water-Resources Investigations Report 83-4178
The Muckleshoot Indian Tribe plans (1982) to build a fish hatchery in part of a 1.56-square-mile area in the Green River valley, Washington, and use groundwater to operate it. Groundwater data were collected in the area and used in a U.S. Geological Survey two-dimensional groundwater-flow model calibrated to simulate the...
Preliminary map showing the difference between the potentiometric surfaces of the Aquia aquifer of April 1979 and September 1982 in southern Maryland
F. K. Mack, J. C. Wheeler, S. E. Curtin
1984, Open-File Report 83-930
A map was prepared that shows the net change in the potentiometric surface of the Aquia aquifer in southern Maryland between April 1979 and September 1983. During this period, the potentiometric surface declined (1) at least a few feet throughout the entire southern Maryland area, and (2) more than 10...
Growth, reproduction, mortality, distribution, and biomass of freshwater drum in Lake Erie
Michael T. Bur
1984, Journal of Great Lakes Research (10) 48-58
Predominant age-groups in the Lake Erie freshwater drum Aplodinotus grunnienspopulation were 3, 4, and 5 as determined from gill net, trap net, bottom trawl, and midwater trawl samples. Age and growth calculations indicated that females grew faster than males. However, the length-weight relation did not differ between sexes and was described...
Distribution of Eurasian watermilfoil, Myriophyllum spicatum, in the St. Clair-Detroit River system in 1978
Donald W. Schloesser, Bruce A. Manny
1984, Journal of Great Lakes Research (10) 322-326
Submersed macrophytes were surveyed at 595 stations located throughout the St. Clair-Detroit River system between Lakes Huron and Erie, 23 August to 13 October 1978. Eurasian watermilfoil (Myriophyllum spicatum), first recorded in the system in 1974, became the fourth most common submersed macrophyte in the system by 1978. However, it...