Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16746
Early vegetational changes on a forested wetland constructed for mitigation Early vegetational changes on a forested wetland constructed for mitigation
Changes in vegetation were studied on 15 acres of a 35 acre forested wetland created as a mitigation site in Anne Arundel County, Maryland during 1994-96. Meter-square sampling on four different hydrologic elevations determined that grasses initially dominated the area, but decreased from 59 percent in 1994 to 51 percent in 1995 and 30 percent in 1996. Herbaceous non-grass plants (forbs)
Authors
Matthew C. Perry, P.C. Osenton, C.B. Sibrel
Reconsidering paradigms of overpopulation in ungulates: white-tailed deer at Saratoga National Historical Park Reconsidering paradigms of overpopulation in ungulates: white-tailed deer at Saratoga National Historical Park
No abstract available.
Authors
H.B. Underwood, W.F. Porter
Deer management and the concept of overabundance Deer management and the concept of overabundance
No abstract available.
Authors
W.J. McShea, H.B. Underwood, J.H. Rappole
The Baltic Macoma: abundance and distribution of an important winter food of diving ducks in Chesapeake Bay The Baltic Macoma: abundance and distribution of an important winter food of diving ducks in Chesapeake Bay
Poor water quality and widespread depletion of wild celery (Vallisneria americana) and other submerged aquatic plants important as waterfowl foods has resulted in the continued dependence of canvasbacks (Aythya valisineria) on Baltic clams (Macoma balthica) as their primary winter food. Despite this dependence, no information exists regarding the distribution and abundance of Baltic...
Authors
Dennis G. Jorde, G.M. Haramis
Characteristics of some black duck nest sites in Maine Characteristics of some black duck nest sites in Maine
A standard method for characterizing nest sites and concealment (visibility of orange decoy and percent overhead cover measured by densiometer) was used to obtain characteristics of 36 nest sites of black ducks in Maine, 1978-89. Nest locations were represented by cutover areas (10), islands (6), bogmat (5), emergent meadow (5), emergent wetland (3), stream floodplain (3), hardwood...
Authors
J. R. Longcore, D.G. McAuley, J.K. Ringelman
Long bone fracture management in a sandhill crane: a case report Long bone fracture management in a sandhill crane: a case report
No abstract available.
Authors
P. N. Klein, D. Thompson
Studies of sea ducks in the Atlantic flyway Studies of sea ducks in the Atlantic flyway
No abstract available.
Authors
D.G. Krementz, David F. Caithamer
Results of an experiment to lead cranes on migration behind motorized ground vehicles Results of an experiment to lead cranes on migration behind motorized ground vehicles
Ten greater sandhill cranes (Grus canadensis tabida), trained to enter and ride in a specially equipped truck, were transported at 80? days of age from their rearing site at Patuxent Wildlife Research Center (Patuxent), Maryland, to a reintroduction site located within the species? former breeding range in northern Arizona. After 5 additional weeks of training, these juvenile cranes were...
Authors
D. H. Ellis, B. Clauss, T. Watanabe, R.C. Mykut, M. Kinloch, Catherine H. Ellis
Late Paleocene and early Eocene calcareous nannofossils from three boreholes in an onshore-offshore transect from New Jersey to the Atlantic Continental Rise Late Paleocene and early Eocene calcareous nannofossils from three boreholes in an onshore-offshore transect from New Jersey to the Atlantic Continental Rise
Closely spaced, upper Paleocene and lower Eocene samples from three boreholes near Clayton, NJ, at Island Beach, NJ, and at Site 605 on the Atlantic Ocean continental rise were examined for their calcareous nannofossil content. This study documents calcareous nannofossil occurrences in Zones NP9 and NP10 and identifies biostratigraphically useful species, presents unexpected upbasin...
Authors
Laurel M. Bybell, Jean Self-Trail
The effects of experimental starter diets with different levels of soybean or menhaden oil on red drum (Sciaenops ocellatus) The effects of experimental starter diets with different levels of soybean or menhaden oil on red drum (Sciaenops ocellatus)
Red drum reared from captive-spawned eggs were used in a 2 × 4 factorial experiment comparing eight diets with soybean oil (SBO) or menhaden oil (MHO) added to a basal diet (about 3.4% lipid from practical ingredients) at 1.5, 5.2, 9.0, or 12.7%. Triplicate groups of 20 early juveniles (mean 0.4 g) were stocked in 1000 litre fiberglass tanks supplied with filtered estuarine water (17–26...
Authors
J. W. Tucker, William A. Lellis, G. K. Vermeer, D. E. Roberts, P. N. Woodward
Genetic responses of Isonychia bicolor (Ephemeroptera: Isonychiidae) to chronic mercury pollution Genetic responses of Isonychia bicolor (Ephemeroptera: Isonychiidae) to chronic mercury pollution
The relationship between allozyme genotype and survival of nymphs of the mayfly Isonychia bicolor (Walker) when exposed to acute mercury concentrations was tested in laboratory experiments. The probability of survival and individual times-to-death were found to be significantly different among genotypes at the glucose phosphate isomerase locus, but not at the phosphoglucomutase locus...
Authors
C.D. Snyder, A.C. Hendricks
Food and prey selection of recently released American shad (Alosa sapidissima) larvae Food and prey selection of recently released American shad (Alosa sapidissima) larvae
We examined the diet composition and prey selection of 1,875 recently released American shad (Alosa sapidissima) larvae (approximately 18-d old). Larvae were collected in the Juniata River, Pennsylvania, during June in 1991 and 1992. Chironomid pupae were selected by shad larvae and were the major component in the diet in 1991 (50%) and 1992 (96%). Chironomid larvae, the second-ranked...
Authors
J. H. Johnson, D. S. Dropkin