Publications
This is a list of publications written by Patuxent employees since Patuxent opened in 1939. To search for Patuxent's publications by author or title, please click below to go to the USGS Publication Warehouse.
Filter Total Items: 8128
Relative effects of nutrient enrichment and grazing on epiphyte-macrophyte (Zostera marina L.) dynamics Relative effects of nutrient enrichment and grazing on epiphyte-macrophyte (Zostera marina L.) dynamics
The independent and interactive effects of nutrient concentration and epiphyte grazers on epiphyte biomass and macrophyte growth and production were examined in Zostera marina L. (eelgrass) microcosms. Experiments were conducted during early summer, late summer, fall, and spring in a greenhouse on the York River estuary of Chesapeake Bay. Nutrient treatments consisted of ambient or...
Authors
Hilary A. Neckles, R. L. Wetzel, R.J. Orth
Simulation testing of unbiasedness of variance estimators Simulation testing of unbiasedness of variance estimators
In this article I address the evaluation of estimators of variance for parameter estimates. Given an unbiased estimator X of a parameter θ, and an estimator V of the variance of X, how does one test (via simulation) whether V is an unbiased estimator of the variance of X? The derivation of the test statistic illustrates the need for care in substituting consistent estimators for unknown...
Authors
William A. Link
The effects of hurricanes on birds, with special reference to Caribbean islands The effects of hurricanes on birds, with special reference to Caribbean islands
Cyclonic storms, variously called typhoons, cyclones, or hurricanes (henceforth, hurricanes), are common in many parts of the world, where their frequent occurrence can have both direct and indirect effects on bird populations. Direct effects of hurricanes include mortality from exposure to hurricane winds, rains, and storm surges, and geographic displacement of individuals by storm...
Authors
James W. Wiley, Joseph M. Wunderle
Problems and practices in backcountry recreation management: A survey of National Park Service managers Problems and practices in backcountry recreation management: A survey of National Park Service managers
No abstract available.
Authors
J. L. Marion, J.W. Roggenbuck, R.E. Manning
[Letter to the editor] Idolizing wolves [Letter to the editor] Idolizing wolves
No abstract available.
Authors
L.D. Mech
The mating behavior of Iguana iguana (Part 2) The mating behavior of Iguana iguana (Part 2)
No abstract available.
Authors
G.H. Rodda
Efficiency and optimal allocation in the staggered entry design Efficiency and optimal allocation in the staggered entry design
The staggered entry design for survival analysis specifies that r left-truncated samples are to be used in estimation of a population survival function. The ith sample is taken at time Bi, from the subpopulation of individuals having survival time exceeding Bi. This paper investigates the performance of the staggered entry design relative to the usual design in which all samples have a...
Authors
W.A. Link
Selenium accumulation and loss in mallard eggs Selenium accumulation and loss in mallard eggs
Five female mallards (Anas platyrhynchos) that had just started egg laying were first fed a diet containing 15 ppm selenium in the form of selenomethionine for 20 d and then an untreated diet for 20 d. Selenium levels in eggs peaked (to about 13-20 ppm) in about two weeks on the treated diet and leveled off at a low level ( 5 ppm) after about 10 d back on the untreated diet. Selenium...
Authors
G. H. Heinz
Nestling eastern phoebes entangled in fishing line Nestling eastern phoebes entangled in fishing line
No abstract available.
Authors
R. B. Clapp