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Articles 1861 - 1890 of 4995
Full-Text Articles in Entire DC Network
The North American Reporting Center For Amphibian Malformations, Douglas H. Johnson, Suzanne C. Fowle, Jeffrey A. Jundt
The North American Reporting Center For Amphibian Malformations, Douglas H. Johnson, Suzanne C. Fowle, Jeffrey A. Jundt
Journal of the Iowa Academy of Science: JIAS
The North American Reporting Center for Amphibian Malformations was established to provide a conduit of information about, and a systematic data base on, malformed amphibians. This article describes the Reporting Center and the variety of features available at its Web site, presents an example of a summary analysis that can be conducted with its data, discusses caveats about the data, and makes recommendations about systematic surveys to better understand patterns and trends in the incidence of malformed amphibians.
Herpetofaunal Abundance And Distribution In Northern Minnesota: Contributions Of Ecological Land Units And Assessment Of Sampling Methodology, Gabrielle Yaunches, S. R. Winterstein, H. Campa Iii, B. J. Kernohan, J. B. Haufler
Herpetofaunal Abundance And Distribution In Northern Minnesota: Contributions Of Ecological Land Units And Assessment Of Sampling Methodology, Gabrielle Yaunches, S. R. Winterstein, H. Campa Iii, B. J. Kernohan, J. B. Haufler
Journal of the Iowa Academy of Science: JIAS
Herpetofaunal species distributions need to be understood and mapped using landscape descriptions that incorporate important habitat features and ecological processes. An ecosystem management effort in northern Minnesota is characterizing a landscape as a coarse filter for ecological communities. The coarse filter approach involves looking at communities in different successional stages and habitat types in a region (Haufler et al. 1996). Documenting distributions and abundances of herpetofauna using this coarse filter approach will allow data about these species to be incorporated in landscape planning efforts.
Conclusions Drawn From The Malformity And Disease Session, Midwest Declining Amphibians Conference, 1998, Michael J. Lannoo
Conclusions Drawn From The Malformity And Disease Session, Midwest Declining Amphibians Conference, 1998, Michael J. Lannoo
Journal of the Iowa Academy of Science: JIAS
While the general problem of amphibian declines is well known, no issue recently has engendered as much concern by the public as amphibian malformities (Ouellet et al. 1996, Tietge 1996, Gray 1998, Helgen et al. 1998a and 1998b, D. Johnson 1998, T. Johnson 1998, Meteyer and Converse 1998). As a result, Gary Casper, Chris Phillips and I decided to assemble this symposium. The session was open to anyone who wished to participate. Nineteen papers were presented (there was one cancellation) and a panel discussion followed. I will organize this summary of, and conclusions drawn from, our symposium into two sections: …
Field Surveys Of Midwestern And Northeastern Fish And Wildlife Service Lands For The Presence Of Abnormal Frogs And Toads, Kathryn A. Converse, James Mattsson, Laura Eaton-Poole
Field Surveys Of Midwestern And Northeastern Fish And Wildlife Service Lands For The Presence Of Abnormal Frogs And Toads, Kathryn A. Converse, James Mattsson, Laura Eaton-Poole
Journal of the Iowa Academy of Science: JIAS
The national distribution of information on the discovery of malformations in Minnesota frogs in 1995 stimulated collection and examination of newly metamorphosed frogs during 1996. By late summer and early fall of 1996, malformed frogs and toads were reported on U.S. Fish and Wildlife Service (USFWS) lands in Vermont (Northeast, Region 5) and Minnesota (Midwest, Region 3). In response to these reports, biologists in USFWS Regions 3 and 5 conducted a survey, during the summer of 1997 to determine the distribution and type of malformations in frogs and toads on selected Federal lands. Region 3 personnel surveyed 38 field stations …
Editorial Board & Iowa Academy Of Science Officers And Directors
Editorial Board & Iowa Academy Of Science Officers And Directors
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Northen Iowa Tennis 2000-2001, University Of Northern Iowa
Northen Iowa Tennis 2000-2001, University Of Northern Iowa
Athletics Media Guides
Contents:
--Men's and Women's 2000-01 Schedule --IBC
--Miscellaneous Information --IFC
--Coaching Biographies --1
--2000-01 Men's Season Outlook --2
--2000-01 Men's Player Profiles --3-5
--2000-01 Women's Season Outlook --6
--2000-01 Women's Player Profiles --7-8
--Men's and Women's Records --9
--University of Northern Iowa --10
--President and Athletic Director --11
--Black Hawk Tennis Club --12
The Principal : A Reflective Essay, Mel F. Mysak
The Principal : A Reflective Essay, Mel F. Mysak
Graduate Research Papers
As I think of the principal my mind takes me back to my early school days. As a young student one of my earliest encounters with a principal was on a disciplinary matter. Even though the incident must have been in first or second grade I still clearly remember it to this day. Hence, one of my first encounters with a principal was a negative one. Due to the nature of the job, disciplinarian is one of the roles of the principal that I now understand. This incident causes me to consider that as a principal I will never know …
Book Review: Iowa's Geological Past: Three Billion Years Of Change, Raymond R. Anderson
Book Review: Iowa's Geological Past: Three Billion Years Of Change, Raymond R. Anderson
Journal of the Iowa Academy of Science: JIAS
Iowa's Geological Past: Three Billion Years of Change. Wayne Anderson, 1998. University of Iowa Press, Iowa City IA. xii + 424 pages. ISBN 0-87745-639-9, ISBN 0-87745-640-2 (pbk.).
Wayne Anderson, born in geode country in southeast Iowa, earned his Bachelors, Masters, and Ph.D. at the University of Iowa (writing a thesis and dissertation on Iowa geologic topics). He will complete a 37-year career teaching geology at the University of Northern Iowa with his retirement in the Spring of 2000. His research activities and the work of his students have added greatly to our understanding of the geology of eastern Iowa. In …
Checklist Of Instructions For Authors
Checklist Of Instructions For Authors
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Density-Dependent Effects On Microhabitat Selection And Activity Of Two Species Of Larval Ambystoma Salamanders, Jeanette M. Jaskula, Robert Brodman
Density-Dependent Effects On Microhabitat Selection And Activity Of Two Species Of Larval Ambystoma Salamanders, Jeanette M. Jaskula, Robert Brodman
Journal of the Iowa Academy of Science: JIAS
To be able to distinguish unnatural amphibian declines from natural population fluctuations we need a better understanding of the mechanisms that affect amphibian community structure. Larval pond-breeding salamanders exhibit density-dependent effects on population parameters, but little is known of the effect of density on behaviors that mediate interactions. Two species, Amby1toma tigrinum (tiger salamander) and A. laterale (blue-spotted salamander), were evaluated in laboratory aquaria for intraspecific and interspecific interactions that affect microhabitat selection and activity. Microhabitat selection was studied by partitioning containers into microhabitats that either contained or lacked refuges, and movement was recorded over a hexagonal grid to determine …
Including Preschool Children In The School Counseling Program : Classroom Recommendations For Counselors, Nancy A. Kriener
Including Preschool Children In The School Counseling Program : Classroom Recommendations For Counselors, Nancy A. Kriener
Graduate Research Papers
School counselors have long advocated including all children in their guidance programs. However, preschool children who attend public schools are often not a part of the school counseling program.
In light of the national trend emphasizing the importance of early childhood education, many public schools are assuming more responsibility for preschool education (Hohenshil & Hohenshil, 1989). As more and more preschools are being adopted by public schools, school counselors must be ready to extend their services to these children.
Handbook Of Environmental Regulations For Agribusiness, Iowa Waste Reduction Center
Handbook Of Environmental Regulations For Agribusiness, Iowa Waste Reduction Center
Iowa Waste Reduction Center Book Gallery
This Handbook is intended to provide the information needed for agribusiness facilities to comply with state and federal environmental regulations. Staff at the Iowa Waste Reduction Center wrote the Handbook. Technical input and review was provided by Dan Eddinger, Nebraska Department of Enviromental Quality; Mark Lohafer and John Whipple, Iowa Department of Land and Agricultural Stewardship; staff at the United States Environmental Protection Agency (U.S.EPA) Region 7; staff at the Iowa Department of Natural Resources (IDNR); and Chris Murray, Agribusiness Association of Iowa.
Iowa Academy Of Science Membership Directory, 2000-2001, Iowa Academy Of Science
Iowa Academy Of Science Membership Directory, 2000-2001, Iowa Academy Of Science
Iowa Academy of Science Documents
Contents:
Editorial Board, Journal ... 5
Committees ... 6
Sections ... 18
ISTS Regional Directors ... 22
Awards of Merit ... 24
Excellence in Science Teaching Awards ... 25
Past Presidents ... 26
Membership Roster ... 27
Corporate Sponsors ... 63
Short Story, Volume 8, Number 1, Spring 2000 [Download Entire Issue]
Short Story, Volume 8, Number 1, Spring 2000 [Download Entire Issue]
Short Story
No abstract provided.
The Wine Of Astonishment, Michael Cody
Project Body Image, Elaine M. Eshbaugh
Project Body Image, Elaine M. Eshbaugh
Presidential Scholars Theses (1990 – 2006)
I have chosen to develop an intervention intended to improve body image in middle/junior high school girls. This project has been conducted in four parts: 1) literature review, 2) initial screening, 3) college interviews, and 4) middle school group interview. My goal in interviewing college women was to compare the ideas and experiences of those with positive and negative body images and incorporate these findings into my intervention. My motivation for interviewing middle school girls was to explore more fully their culture, in particular the media images that are most influential in their lives. I will detail each of these …
After The Rain, Joan Heck
Green Almonds, Rachel Wright
The Gaps In The Storm, Dave Hoing
The Cougar At The Well, James C. Work
Announcements Of Upcoming Meetings And Symposia
Announcements Of Upcoming Meetings And Symposia
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Effects Of Pcb 126 And Ammonia, Alone And In Combination, On Green Frog (Rana Clamitans) And Leopard Frog (R. Pipiens) Hatching Success, Development, And Metamorphosis, Mariana Beatriz Jofre, Michele L. Rosenshield, William H. Karasov
Effects Of Pcb 126 And Ammonia, Alone And In Combination, On Green Frog (Rana Clamitans) And Leopard Frog (R. Pipiens) Hatching Success, Development, And Metamorphosis, Mariana Beatriz Jofre, Michele L. Rosenshield, William H. Karasov
Journal of the Iowa Academy of Science: JIAS
The Green Bay watershed in Wisconsin is polluted with polychlorinated biphenyls (PCBs), dioxin, heavy metals, ammonia, and over 100 organic contaminants. In this study we exposed embryos and larvae of two ranid species commonly occurring in the Green Bay ecosystem, the green frog (Rana clamitans) and the leopard frog (R. pipiens), to PCB 126 (3,3', 4,4', 5-Pentachlorobyphenil, nominal concentrations 0-50 μg/l, two control treatments: water plus 0.08% acetone as carrier for the PCB, water alone), unionized ammonia (0-2 mg/I), and mixtures of both contaminants. Exposure to PCB 126 did not cause significant mortality of embryos before hatching. However, exposure to …
Reduction In Road Mortality In A Northern Leopard Frog Population, Madeleine H. Linck
Reduction In Road Mortality In A Northern Leopard Frog Population, Madeleine H. Linck
Journal of the Iowa Academy of Science: JIAS
Since spring of 1994, Hennepin Parks Natural Resources Management staff, assisted by numerous volunteers, has been working to reduce road mortality among migrating Northern Leopard Frogs (Rana pipiens) adjacent to Baker Park Reserve in Maple Plain, Hennepin County, Minnesota. A county road separates the overwintering site from breeding habitat within the park. With steadily increasing traffic over the years, this population of frogs was in serious decline. For the first two years (1994 and 1995) rescue efforts were limited to the spring collection of frogs as they migrated out of the overwintering lake coward the breeding wetlands, although the road …
Photo-Enhanced Toxicity In Amphibians: Synergistic Interactions Of Solar Ultraviolet Radiation And Aquatic Contaminants, Edward E. Little, Robin Calfee, Richard Skinker, Angela Zaga-Parkhurst, Mace G. Barron
Photo-Enhanced Toxicity In Amphibians: Synergistic Interactions Of Solar Ultraviolet Radiation And Aquatic Contaminants, Edward E. Little, Robin Calfee, Richard Skinker, Angela Zaga-Parkhurst, Mace G. Barron
Journal of the Iowa Academy of Science: JIAS
Amphibians experience a broad range of multiple environmental stressors that occur in natural systems. However, the impact of combinations of these stressors on amphibians are rarely examined. The effect of two stressors on amphibians, solar ultraviolet radiation (SUV) and environmental contamination, was investigated. To examine the interactive effects of SUV and environmental contaminants, Hyla venicolor and Rana sphenocephala were exposed in the laboratory to a carbamate insecticide and the water soluble fraction of a weathered petroleum in combination with various intensities of simulated solar radiation (SSR). The contaminants were tested at environmentally relevant concentrations. Synergistic interactions between SSR and these …
Effects Of Altosid And Abate-4e On Deformities And Survival In Southern Leopard Frogs Under Semi-Natural Conditions, Donald W. Sparling
Effects Of Altosid And Abate-4e On Deformities And Survival In Southern Leopard Frogs Under Semi-Natural Conditions, Donald W. Sparling
Journal of the Iowa Academy of Science: JIAS
Since 1995 when a group of school children in Minnesota found frogs with supernumerary limbs and missing limbs, there has been widespread interest in the amphibian malformation issue. Despite considerable effort to understand this problem, its extent and seriousness as well as direct causes of these malformations remain unclear. Progress on this issue has been hampered by a scarcity of scientifically reliable information on historical rates of abnormalities under undisturbed conditions and by the normal turnaround times of data collection, sample analysis and publication. One of the very few peer-reviewed publications with field-collected data showed that an average of 12% …
Field Investigations Of Malformed Frogs In Minnesota 1993-97, Judy C. Helgen, Mark C. Gernes, Susan M. Kersten, Joel W. Chirhart, Jeff T. Canfield, Dorothy Bowers, Jon Haferman, Robert G. Mckinnell, David M. Hoppe
Field Investigations Of Malformed Frogs In Minnesota 1993-97, Judy C. Helgen, Mark C. Gernes, Susan M. Kersten, Joel W. Chirhart, Jeff T. Canfield, Dorothy Bowers, Jon Haferman, Robert G. Mckinnell, David M. Hoppe
Journal of the Iowa Academy of Science: JIAS
Reports of malformed frogs were made to the Minnesota Pollution Control Agency (MPCA) from different parts of Minnesota in 1993, 1995, 1996, and 1997 and one, nine, 190, and 172 reports were received, respectively. MPCA field crews and Drs. Hoppe and McKinnell documented malformed frog locations starting in 1993. By 1997, MPCA field crews documented malformed frogs at 62 locations in Minnesota, in 29 of 87 counties. Most malformations were in young metamorphs of Rana pipiens but they were observed also in R. clamitans, R. septentrionalis, R. sylvatica, Bufo americanus, and Hyla spp. Frequencies of malformations varied by time of …
Revitalization Of Ephemeral Pools As Frog Breeding Habitat In An Illinois Forest Preserve, Denins Nyberg, Irene Lerner
Revitalization Of Ephemeral Pools As Frog Breeding Habitat In An Illinois Forest Preserve, Denins Nyberg, Irene Lerner
Journal of the Iowa Academy of Science: JIAS
Almost all land in the eastern United States that has been acquired to preserve nature was once in agricultural usage, and because of this, alterations of ephemeral pool hydrology are common in forest preserves and parks. These ephemeral pools are an important breeding resource for many amphibian species. We hypothesized that filling drainage ditches and recreating a more natural topography at eroded berms would enhance amphibian populations in the forest preserve. Restoration of the hydrology was begun by volunteers in 1993 and was associated with management to reduce non-native woody vegetation. Three ephemeral pools have had maximum water levels raised …
Amphibian And Reptile Surveys In The Kaskaskia River Drainage Of Illinois During 1997 And 1998, Allan K. Wilson
Amphibian And Reptile Surveys In The Kaskaskia River Drainage Of Illinois During 1997 And 1998, Allan K. Wilson
Journal of the Iowa Academy of Science: JIAS
Currently there is little doubt among the scientific community of the decline of amphibians on an international scale (Berger et al. 1998, Kuzmin 1994, Laurance et al. 1996, Lips 1998) and across North America (Delis et al. 1996, Drost and Fellers 1996, Lannoo 1994). In light of these widespread declines it is essential that current populations be inventoried and evaluated so that future population changes can be detected and hopefully correlated with possible causes. Critical baseline information is lost when monitoring is not implemented until after a problem is detected. The effectiveness of long-term studies in detecting amphibian declines (Beebee …
Editorial Board & Iowa Academy Of Science Officers And Directors
Editorial Board & Iowa Academy Of Science Officers And Directors
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Interactive Effects Of Anthropogenic, Environmental, And Biotic Stressors On Multiple Endpoints In Hyla Chrysoscelis, Carol A. Britson, Stephen T. Threlkeld
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, …