Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16731
Atlantic Flyway review: Piedmont-Coastal Plain, Region IV, Fall 1999: Robbins Nest, Laurel, MD (390-0765) Atlantic Flyway review: Piedmont-Coastal Plain, Region IV, Fall 1999: Robbins Nest, Laurel, MD (390-0765)
This is the first of three stations along the Patuxent River. Elevation here at the edge of the Piedmont ranges from 265 ft at the house to 160 ft at the river. In spite of easterly winds and heavily overcast skies from Hurricanes Dennis, Floyd, and Irene, we suffered from drought all summer, not rain. We had only about two inches each in June and July, 4.55 in August, then a whopping 16...
Authors
Chandler S. Robbins
Estimation of contributions to population growth: A reverse-time capture-recapture approach Estimation of contributions to population growth: A reverse-time capture-recapture approach
We consider methods for estimating the relative contributions of different demographic components, and their associated vital rates, to population growth. We identify components of the population at time i (including a component for animals not in the population at i). For each such component we ask the following question: “What is the probability that an individual randomly selected...
Authors
J.D. Nichols, J.E. Hines, J.D. Lebreton, R. Pradel
Aspects of amphibian anatomy and physiology Aspects of amphibian anatomy and physiology
No abstract available.
Authors
P.F.P. Henry
Diversity and distribution of amphibians and reptiles Diversity and distribution of amphibians and reptiles
No abstract available.
Authors
R.W. McDiarmid, J.C. Mitchell
Ecotoxicology of organic contaminants to amphibians Ecotoxicology of organic contaminants to amphibians
The effects of organic contaminants on amphibians are poorly known but of considerable interest. These contaminants include the highly toxic dioxins and furans as well as PCBs, PAHs and organochlorine pesticides. Although these compounds may have lower acute toxicity than dioxins and furans, they have been implicated in several problems associated with genotoxicity, endocrine disruption
Authors
D. W. Sparling
Approaches for assessment of terrestrial vertebrate responses to contaminants: moving beyond individual organisms Approaches for assessment of terrestrial vertebrate responses to contaminants: moving beyond individual organisms
Conclusions: A need for a broader range ofinformation on effects of contaminants on individuals exists among the 4 classes of terrestrial vertebrates, especially mammals, reptiles, and amphibians. Separation of contaminant effects from other effects and reduction of speculative extrapolation within and among species requires information that can be produced only by combined field and...
Authors
P.H. Albers, G. H. Heinz, R.J. Hall
Effects of Altosid and Abate-4E on deformities and survival in southern leopard frogs under semi-natural conditions Effects of Altosid and Abate-4E on deformities and survival in southern leopard frogs under semi-natural conditions
Experimental wetlands were sprayed with Abate-4E (a.i. temephos) and Altosid (a.i. methoprene) through the summer following label directions. In late August and early Septemeber metamorphing tadpoles were captured and examined for deformities. Tadpoles captured from ponds sprayed with Altosid had a 15% deformity rate mostly involving total or partially missing hind limbs. Tadpoles from...
Authors
D. W. Sparling
Establishment of warm season grasses with and without the use of compost soil amendments Establishment of warm season grasses with and without the use of compost soil amendments
Two compost materials (COMPRO and LEAFGRO) were evaluated as soil amendments to enhance wildlife habitats, while maintaining optimal floral and faunal biodiversity. Special emphasis was placed on the role of compost in the establishment and retention of native warm season grasses (Andropogon gerardi, Schizachyrium scoparium, and Sorghastrum nutans). This study was conducted at two sites...
Authors
Matthew C. Perry, P.C. Osenton, G.A. Gough, E.J.R. Lohnes
Limb dysfunction Limb dysfunction
No abstract available.
Authors
Glenn H. Olsen, P.T. Redig, S.E. Orosz
Problems of the bill and oropharynx Problems of the bill and oropharynx
No abstract available.
Authors
Glenn H. Olsen
Monitoring survival rates of landbirds at varying spatial scales: An application of the MAPS Program Monitoring survival rates of landbirds at varying spatial scales: An application of the MAPS Program
Survivorship is a primary demographic parameter affecting population dynamics, and thus trends in species abundance. The Monitoring Avian Productivity and Survivorship (MAPS) program is a cooperative effort designed to monitor landbird demographic parameters. A principle goal of MAPS is to estimate annual survivorship and identify spatial patterns and temporal trends in these rates. We
Authors
D.K. Rosenberg, D.F. DeSante, J.E. Hines
Population and habitat viability assessments for Golden-cheeked Warblers and Black-capped Vireos: Usefulness to Partners in Flight Conservation Planning Population and habitat viability assessments for Golden-cheeked Warblers and Black-capped Vireos: Usefulness to Partners in Flight Conservation Planning
Golden-cheeked Warblers and Black-capped Vireos are Neotropical migratory birds that are federally listed as endangered. Recovery plans for both species advise the use of viability modeling as a tool for setting specific recovery and management targets. Population and Habitat Viability Assessment workshops were conducted to develop population targets and conservation recommendations for...
Authors
C.J. Beardmore, Jeff S. Hatfield