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Publications

These publications showcase the significant science conducted in our Science Centers.

Filter Total Items: 16756

Efficacy of eastern encephalitis immunization in whooping cranes Efficacy of eastern encephalitis immunization in whooping cranes

An epizootic of eastern equine encephalitis (EEE) at the Patuxent Wildlife Research Center (PWRC), Laurel, Maryland (USA), in 1989 provided an opportunity to determine if EEE immunization protected whooping cranes (Grus americana). Based on seroconversion of 31% of sympatric hatch-year sandhill cranes, Grus canadensis, and a previous 35% case fatality rate in whooping cranes, 17 (37%) of...
Authors
Glenn H. Olsen, M.J. Turell, B.B. Pagac

Watershield use by ring-necked ducks Watershield use by ring-necked ducks

During 1993-94 and 1994-95, the amount of watershield (Brasenia schreberi) in selected Maryland wetlands was determined to see if a relationship existed between the amount of watershield on a wetland and the number of ring-necked ducks (Aythya collaris) observed on that wetland. Data were collected for two years from eight different wetlands on the Patuxent Research Refuge in Laurel...
Authors
J.A. Olsen, Matthew C. Perry

Migration chronology and distribution of redheads on the lower Laguna Madre, Texas Migration chronology and distribution of redheads on the lower Laguna Madre, Texas

An estimated 80% of redheads (Aythya americana) winter on the Laguna Madre of southern Texas and Mexico. Because there have been profound changes in the Laguna Madre over the past three decades and the area is facing increasing industrial and recreational development, we studied the winter distribution and habitat requirements of redheads during two winters (1987-1988 and 1988-1989) on...
Authors
Christine M. Custer, T. W. Custer, P.J. Zwank

Reinterpretation of the peninsular Florida Oligocene: An integrated stratigraphic approach Reinterpretation of the peninsular Florida Oligocene: An integrated stratigraphic approach

A very thick (> 300 m) nearly continuous Oligocene section exists in southern peninsular Florida, as revealed by lithostratigraphic, biostratigraphic (mollusks and dinocysts), chronostratigraphic (Sr isotopes) and petrographic analyses of twelve cores and two quarries. The Oligocene deposits in the subsurface of southern Florida are the thickest documented in the southeastern U.S., and...
Authors
G. Lynn Wingard, T.M. Scott, Lucy E. Edwards, S.D. Weedman, K. R. Simmons

Continuous monitoring of dissolved oxygen and total dissolved gas pressure based on head-space partial pressures Continuous monitoring of dissolved oxygen and total dissolved gas pressure based on head-space partial pressures

We describe an instrument prototype that measures total dissolved gas pressure (TGP) and dissolved oxygen (DO) without need for standard wetted probe membranes or gas permeable tubing. Measurements were based instead on gas-phase partial pressures that develop within the head-space of a pressure vessel, and on Henry's Law. Performance trials established that differences between standard
Authors
B.J. Watten, D. R. Smith, W. J. Ridge

Prey patchiness and larval fish growth and survival: inferences from an individual-based model Prey patchiness and larval fish growth and survival: inferences from an individual-based model

We used an individual-based simulation model to evaluate how prey patchiness and fish swimming behavior affect larval fish survival and mortality source (predation or starvation). Simulations revealed that cohort survival increased linearly with greater average patch residence times and that patch residence times for individual fish with different fates (survived, starved, eaten)...
Authors
Benjamin H. Letcher, James A. Rice
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