Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16783
Study of aggregative behavior of Rhinophrynus dorsalis tadpoles: design and analysis
We conducted experiments using the apparatus and design followed by Wassersug and Hessler (1971) and Wassersug (1973) to test the aggregative behavior of tadpoles of Rhinophrynus dorsalis in response to visual and olfactory stimuli. Results neither supported nor refuted the hypothesis that either stimulus is used as a mechanism for school formation. The exercise did lead to doubts about the exper
Authors
M.S. Foster, R.W. McDiarmid
Responses of the iguanid lizard Anolis carolinensis to four organophosphorus pesticides
Dose related mortality and cholinesterase effects of parathion, methyl parathion, azinphos-methyl and malathion on Anolis carolinensis were investigated. The comparative effects of the four compounds on fish, birds and mammals are well known, but the effects of organophosphates on reptiles have not been studied critically. Sensitivity and patterns of mortality from exposure to the pesticides resem
Authors
R.J. Hall, D. R. Clark
Toxicity of Prudhoe Bay crude oil to sandhill cranes
No abstract available.
Authors
W. J. Fleming, L. Sileo, J. C. Franson
Endrin decreases screech owl productivity
No abstract available.
Authors
W. J. Fleming, M. A. R. McLane, E. Cromartie
Enzyme activities in plasma, liver, and kidney of black ducks and mallards
Activities of alanine aminotransferase (ALT), aspartate aminotransferase (AST), creatine phosphokinase (CPK), alkaline phosphatase (ALP), and lactate dehydrogenase (LDH) were measured in plasma, liver, and kidney, and gamma-glutamyl transferase (GGT) was measured in liver and kidney of black ducks (Anas rubripes). Activities of ALT, AST, GGT, and ornithine carbamyl transferase (OCT) were assayed i
Authors
J. Christian Franson
Toxicity of dietary lead in young cockerels
Day-old cockerels received 1850 ppm dietary lead for 4 wks. Blood delta-aminolevulinic acid dehydratase (ALAD) activity was reduced to 1.6% of control activity by the end of the study. Hemoglobin concentration (Hb) in lead-exposed cockerels was significantly less than that of controls at 7, 14, and 28 days, and packed cell volume (PCV) was significantly reduced at 14 days. Blood lead residues r
Authors
J. Christian Franson, Thomas W. Custer
Assessing effects of organophosphates on songbirds: Comparison of a captive and a free-living population
No abstract available.
Authors
C. E. Grue, G. V. N. Powell, C.H. Gorsuch
Fall and winter homesite use by wolves in northeastern Minnesota
Post-abandonment homesite use by wolves (Canis lupus) was studied by radio-tracking and simulated howling in two packs in Superior National Forest, Minnesota. Pups, yearlings, and adults returned intermittently to former homesites up to four months after abandonment, usually after prolonged separation from the pack in early fall. Returns sometimes exceeded one week. Preferred summer homesites w
Authors
F.H. Harrington, L. D. Mech
Techniques for trapping, aging, and banding wintering canvasbacks
Techniques used to trap, band, and determine age of Canvasbacks during winter on Chesapeake Bay are presented. Canvasbacks were captured with welded-wire traps baited with corn. Two trap designs were used and traps and trapping techniques are described. Ducks were dipnetted from traps and held in modified poultry crates that provided seclusion and ventilation and allowed birds to dry unsoiled. Ca
Authors
G. M. Haramis, E.L. Derleth, D.G. McAuley
An analysis of howling response parameters useful for wolf pack censusing
Gray wolves (Canis lupus) were studied from April-1972 through April 1974 in the Superior National Forest in northeastern Minnesota by radio-tracking and simulated howling. Based on replies during 217 of 456 howling sessions, the following recommendations were derived for using simulated howling as a census technique: (1) the best times of day are dusk and night; (2) July, August, and September a
Authors
F.H. Harrington, L. D. Mech