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Interactive Effects Of Anthropogenic, Environmental, And Biotic Stressors On Multiple Endpoints In Hyla Chrysoscelis, Carol A. Britson, Stephen T. Threlkeld

Journal of the Iowa Academy of Science: JIAS

Multiple stressors have been proposed as causative agents for declining populations and increased incidence of malformations in amphibians although few studies have examined possible interactions among these stressors. We measured interactive effects of UV radiation, three chemicals, and interspecific competition (with Rana 1phenocephala) on multiple endpoints in Hyla chrysoscelis using a center point- and chemical-free control-enhanced 2⁴ factorial design. UV radiation was transmitted or filtered using OP-4 or OP-3 acrylite filters installed above 72, 500-liter mesocosms on 16 May 1997. Methyl mercury, chlorpyrifos, and atrazine were applied at levels of 0, 10, 50, and 100 % of 400 ppb, …

Defining Anuran Malformations In The Context Of A Developmental Problem, Carol U. Meteyer, Rebecca A. Cole, Kathryn A. Converse, Douglas E. Docherty, Mark Wolcott, Judy C. Helgen, Richard Levey, Laura Eaton-Poole, James G. Burkhart

Journal of the Iowa Academy of Science: JIAS

This paper summarizes terminology and general concepts involved in animal development for the purpose of providing background for the study and understanding of frog malformations. The results of our radiographic investigation of rear limb malformations in Rana pipiens provide evidence that frog malformations are the product of early developmental errors. Although bacteria, parasites and viruses were identified in these metamorphosed frogs, the relevant window to look for the teratogenic affect of these agents is in the early tadpole stage during limb development. As a result, our microbiological findings must be regarded as inconclusive relative to determining their contribution to malformations …

A Relationship Between Trematode Metacercariae And Bullfrog Limb Abnormalities, James L. Christiansen, Heather Feltman

Journal of the Iowa Academy of Science: JIAS

This study is the first report of statistically significant relationships between limb abnormalities and trematode metacercariae in natural populations of frogs. We examined only parasite associations and did not investigate numerous potential pollutants that have been suggested by others to be associated with frog limb abnormalities. Rana catesbeiana of varying ages with a variety of limb abnormalities were found during the flood of 1993. By June 1994, the receding flood waters had left four pools, each with newly metamorphosing bullfrogs. Only one of the pools contained abnormal individuals and histological examination revealed significantly greater prevalence of trematode metacercarial infection in …

Morphological Abnormalities In Illinois Cricket Frogs, Acris Crepitans, 1968-71, Robert H. Gray

Journal of the Iowa Academy of Science: JIAS

Reports of malformed amphibians have been increasing, including external deformities such as missing or extra arms and legs, missing eyes and mandibles, and internal abnormalities involving the bladder, digestive system, and testes. Natural phenomena such as limb amputations during predation attempts by other animals, parasitism, xenobiotic chemicals (herbicides, insecticides, fertilizers and others), and UV-B or other radiation (either directly or indirectly by triggering production of toxicants from nontoxic chemicals) have all been linked to amphibian abnormalities. From 1968-71, I studied the natural history, effective breeding size, and seasonal, annual, and geographic variation in color morph frequencies of cricket frogs (Acris …

Amphibian Use Of Constructed Ponds On Maryland's Eastern Shore, Catherine E. Merovich, James H. Howard

Journal of the Iowa Academy of Science: JIAS

Amphibian assemblages were sampled at nine constructed ponds (three in each age category: new ponds-age <1 yr, young ponds-age 4-5 yr, old ponds-age >30 yr) on Maryland's eastern shore (May-October 1994, March-August 1995) using a total of 27 drift fence and funnel trap arrays. The importance of habitat and landscape variables including pond age was considered in explaining amphibian use and distribution across ponds. Specifically, amphibian (1) abundance; (2) composition; (3) diversity; (4) richness; and (5) reproductive success were studied. During both years, we captured 1904 individuals comprising ten species. The most frequently collected species (species found in all treatments) were Bufo fowleri, Rana sphenocephala utricularius, and Rana …

A Winter/Spring Study Of Salamanders In A Disturbed, Fragmented Habitat Surrounded By Farm Land, James C. Ball

Journal of the Iowa Academy of Science: JIAS

The continued development of fragmented habitats contributes to the decline of amphibians species, and there needs to be a method for evaluating the potential of these habitats to sustain amphibian populations. The effect of fragmented and disturbed habitats among salamander species is difficult to assess because these caudates are difficult to find and enumerate. One approach for estimating the total population of salamanders is to sample them when they migrate to their winter/spring breeding ponds. One fragmented habitat in Southern Michigan was sampled for breeding salamanders during the winter/spring of 1997. Four species of salamanders were detected at this site; …

Amphibians And Reptiles Captured In Drift Fences In Northwest Wisconsin Pine Barrens, James O. Evrard, Steven R. Hoffman

Journal of the Iowa Academy of Science: JIAS

Drift fence surveys were initiated by the Wisconsin Department of Natural Resources (WDNR) in the Crex Meadows Wildlife Area (CMWA) in 1993. Systematic drift fence trapping of amphibians and reptiles in the northwest pine barrens was conducted in a 1996- 97 cooperative effort by the WDNR, the U.S. Forest Service (USFS), and the Great Lakes Indian Fish and Wildlife Commission (GLIFWC). Drift fences were operated in four managed barrens properties, the CMWA, Namekagon Barrens Wildlife Area (NBWA), the Douglas County Wildlife Area (DCWA), and the Moquah Barrens Wildlife Area (MBWA). Eighteen amphibian and reptile species (four salamanders, eight anurans, one …

Frog And Toad Population Monitoring In Michigan, Lori G. Sargent

Journal of the Iowa Academy of Science: JIAS

A volunteer-based monitoring project for frog and toad populations in Michigan was initiated in 1996. The survey protocols developed by the North American Amphibian Monitoring Program (NAAMP) were used and modified to suit the needs of the Michigan project and because of the highly variable Michigan spring weather. The modifications include route establishment, recommended dates during which surveys are conducted, and a more specific definition of population indices. Development of the project included training workshops for volunteers.

Differences Among The Spatial Distribution Of Sympatric Amphibians, Robert Brodman

Journal of the Iowa Academy of Science: JIAS

To assess amphibian declines, the factors that cause natural fluctuations in population size must be considered (Pechmann et al. 1991). Interspecific competition, predation and pond drying are known to influence patterns of distribution and composition of larval amphibian assemblages (Morin 1983, Brodman 1996, Skelly 1996). While a few studies have quantified amphibian patterns across a large number of ponds, most studies on breeding pond distributions have typically focused on pond characteristics associated with pairs of coexisting species (Thompson and Gates 1982, Skelly 1996). Little has been examined about the differences among the spatial distributions of all potentially interacting amphibian populations …

Iowa Academy Of Science 112th Annual Meeting [2000]: Advance Program, Iowa Academy Of Science

Iowa Academy of Science Documents

Contains information about the schedule and presentations for the 2000 annual meeting of the Iowa Academy of Science.

Federal Habeas In The Information Age, Wayne A. Logan

Minnesota Law Review, Vols. 1-106:1 (1917-2021)

No abstract provided.

Democracy, Anti-Democracy, And The Canon, Richard H. Pildes

Constitutional Commentary, Vols 1–36 (1984–2022)

No abstract provided.

Commencement Program (June 2000), Csusb

CSUSB Commencement Programs

No abstract provided.

The University Of Texas At Arlington Graduate Catalog 2000-2002, The University Of Texas At Arlington

UTA Graduate Catalogs

No abstract provided.

Editorial: Mandatory Reporting Of Child Abuse In Ireland: Some Cautionary Comments, Niall Mcelwee

Irish Journal of Applied Social Studies

The last year of the previous Millennium saw the publication of the latest government document on mandatory reporting of child abuse titled the National Guidelines for the Protection and Welfare of Children. This issue has come to dominate the minds of social care workers and child protection and welfare professionals. This editorial is an edited version of research conducted for a conference on child abuse and sexual offences held in Waterford, Ireland. Mandatory reporting has become a mantra and is now part of a highly politicised debate in this country. It seems to me that mandatory reporting should not be …

Time, Space And Presences: Bangladeshi Girls' Friendships In An English Primary School, James G. Deegan

Irish Journal of Applied Social Studies

The study reported here examined what it is like to be and have friends and how developing conceptions of friendships become embedded in children's peer cultures. It took place in two mixed Year 5 and Year 6 classes in a Church of England Local Education Authority Aided (C of E 'N) primary school in a working-class neighbourhood in a university town in East Anglia, England. A conceptually-split core theme emerged. The core theme is children's enabling and constraining negotiation of friendships and ethnicity within their own tacitly agreed upon boundaries of absences and presences, space and time, and locale. Implications …

Clark University Academic Catalog [1999-2000], Clark University

Clark University Academic Catalogs

Annual academic catalog for the 1999-2000 academic year at Clark University.

Clark University academic catalogs contain academic announcements, course listings and descriptions, degrees and degree requirements, registers of instructor and administrator names, information on buildings and grounds, Clark history, and more. They have had various titles throughout the decades, but for consistency we collectively refer to them as academic catalogs across all titles.

Birding Scioto Trail State Forest, Robert Royse

Ohio Cardinal

No abstract provided.

Excerpts Of Directory, University Of South Florida, 2000-2001, University Of South Florida

Excerpts of University Directories

Excerpts from the 2000-2001 University of South Florida directory. The pages include numbers for the St. Petersburg campus.

Human Taste And Cognition In Tzeltal Maya Medicinal Plant Use, David G. Casagrande

Journal of Ecological Anthropology

Results of recent research strongly suggest that people find beneficial phytochemicals by selecting plants to use as medicinals and that taste plays a major role in this process. The research reported here involved an experiment performed with Highland Tzeltal Maya of Chiapas, Mexico to determine if bitterness served as a chemical cue for plants appropriate for treating gastrointestinal versus respiratory illnesses. Eight Tzeltal men and two women were asked to taste common medicinal preparations, describe the taste, and provide the name and medicinal use of the source plant. They were also shown dried specimens of the same plants and asked …

The Sphere Of The Mind: Reviving The Noösphere Concept For Ecological Anthropology, Felice S. Wyndham

Journal of Ecological Anthropology

No abstract provided.

Table Of Contents, Journal Of Ecological Anthropology (Jea)

Journal of Ecological Anthropology

No abstract provided.

A Descriptive And Phylogenetic Analysis Of Plumulaceous Feather Characters In Charadriiformes, Carla J. Dove

Ornithological Monographs

No abstract provided.

2000 Lindenwood University President’S Report, Dennis Spellmann

State of the University Address (Formerly Annual Reports or President's Reports/)

The 2000 annual report of Lindenwood University.

Smu Research, Volume 7, Office Of Public Affairs

SMU Research Magazine

No abstract provided.

1999-2000 Faculty Senate Annual Report, University Of South Carolina

Faculty Senate

The primary file includes the 1999-2000 Committee on Academic Responsibility Annual Report. Additional annual reports are attached.

Prehistoric Cultural Resources Of The Whitetail Pipestone Area, Jefferson County Montana| An Overview And Implications For Cultural Resource Managers, Sandra L. Morris

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

Cost-Benefit Relationships At South Everson Creek Quarries, Christina E. Kelly

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

Geography Education: Learning From The Leaders, Susan K. Watne

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

Examination Of The Phylogenetic Value Of Molar Cusp Patterns For Australopithecus Paranthropus And Early Homo, Michael Sperazza

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.