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Articles 151 - 171 of 171
Full-Text Articles in Education
G05-1582 How To Reduce Heat Stress In Dairy Cattle, Jeffrey F. Keown, Paul J. Kononoff, Richard J. Grant
G05-1582 How To Reduce Heat Stress In Dairy Cattle, Jeffrey F. Keown, Paul J. Kononoff, Richard J. Grant
University of Nebraska-Lincoln Extension: Historical Materials
Four ways to reduce heat stress and maintain production and fertility in dairy cattle.
Heat stress is one of the leading causes of decreased production and fertility in Nebrasks dairy cattle during summer months. These losses are apparent in the decreased amount of milk shipped, increased days open and decreased breedings per conception. Some heat stress is unavoidable, but effects can be minimized if certain management practices are followed.
G05-1589 Fun Family Time Together, Kathy Bosch
G05-1589 Fun Family Time Together, Kathy Bosch
University of Nebraska-Lincoln Extension: Historical Materials
Listed here are some 100 activities that families can do together to help strengthen their relationships and create unity and loyalty among all family members.
"One criterion for family fun is to make time to be together."
The Moths Of Neal Smith National Wildlife Refuge: A Preliminary Assessment, Michelle N. Lewis, Renae M. Steichen, Keith S. Summerville
The Moths Of Neal Smith National Wildlife Refuge: A Preliminary Assessment, Michelle N. Lewis, Renae M. Steichen, Keith S. Summerville
Journal of the Iowa Academy of Science: JIAS
North American prairie systems are believed to have supported substantial insect biodiversity. Loss of prairie and oak savanna habitats, however, has been severe in many Midwestern states, including Iowa. An unanswered question facing land managers interested in restoring tallgrass prairies to the Iowan landscape is the degree to which restored habitats contain native insect species that are dependent upon prairie habitat. This study reports data from a preliminary survey of the moths of Neal Smith National Wildlife Refuge, a 2,292-ha prairie and oak savanna restoration site in central Iowa. We identified and cataloged a total of 426 species of moths …
Cover - Table Of Contents
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Letter To The Editor - Conservation Of Freshwater Mussels In Iowa, K. Elizabeth Poole
Letter To The Editor - Conservation Of Freshwater Mussels In Iowa, K. Elizabeth Poole
Journal of the Iowa Academy of Science: JIAS
Freshwater mussels occur in a variety of aquatic ecosystems worldwide but nowhere is mussel species richness as high as is reported in North America. With nearly 300 recorded species in the U.S., mussels are key components of freshwater biodiversity playing a vital role in benthic communities. Ecologically important in biological processing and nutrient cycling, mussels are also an important food item for a variety of mammals including mink, otter, and raccoon. In addition to ecological importance, freshwater mussels have been economically important in the production of cultured pearls.
Discordant Harmonies In Fingernail Clam Populations (Musculium Transversum) Of Mississippi River Backwater Lakes, Jim Eckblad
Discordant Harmonies In Fingernail Clam Populations (Musculium Transversum) Of Mississippi River Backwater Lakes, Jim Eckblad
Journal of the Iowa Academy of Science: JIAS
The populations of Musculium transversum from 8 backwater lakes have been studied over a 29-year period based upon over 440 grab samples. These lakes in Navigation Pool 9 of the Upper Mississippi River (UMR) range in size from 2 to 255 hectare surface area, mean depths from 0.2 to 0.9 meters, with mean water exchange times from 0.5 to almost 57 hours. Samples from the 1989-91 period suggested summer Muscu!ium populations had declined to about 9 percent of their mid-1970 levels. Deterministic models have attempted to explain this decline. More recent sampling suggests a substantial recovery of Musculium populations (mid-summer …
Index For The Journal Of The Iowa Academy Of Science Volume 112
Index For The Journal Of The Iowa Academy Of Science Volume 112
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Cover - Table Of Contents
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Iowa's Sand Prairie State Preserves: Anomalous Grain-Size Distributions And Optically Stimulated Luminescence (Osl) Dates, Steven H. Emerman, Brian R. Depew, Lisa K. Anderson
Iowa's Sand Prairie State Preserves: Anomalous Grain-Size Distributions And Optically Stimulated Luminescence (Osl) Dates, Steven H. Emerman, Brian R. Depew, Lisa K. Anderson
Journal of the Iowa Academy of Science: JIAS
Grain-size distributions and optically stimulated luminescence (OSL) dates were obtained for the sand from Iowa's five sand prairie state preserves, which are Behren's Ponds and Woodland, Cedar Hills Sand Prairie, Kish-Ke-Kosh Prairie, Marietta Sand Prairie and Rock Island. OSL dates ranged from the late Pleistocene (15,560 years B.P.) to the very late Holocene (as recent as 590 years B.P.), indicating that the late Pleistocene and Holocene Epochs in Iowa have seen multiple episodes of aridity, which is consistent with results from the Nebraska Sand Hills and eolian sand stringers in southeastern Minnesota. The grain-size distributions were anomalous in that, compared …
Threatened By Industry, Saved By Science: Mussel Propagation At The Fairport Biological Laboratory, James Pritchard
Threatened By Industry, Saved By Science: Mussel Propagation At The Fairport Biological Laboratory, James Pritchard
Journal of the Iowa Academy of Science: JIAS
During the 1890s, people on the Mississippi River exploited mussel populations to support a thriving button industry. Within a brief time, they noticed significant declines in mussel populations, and called on the U.S. Bureau of Fisheries to save the resource. This paper discusses mussel propagation studies, techniques, and activities carried on in association with the Fairport Biological Laboratory (Iowa) from about 1908 to 1932. While scientists developed sophisticated techniques and had success in mussel propagation, changing habitat conditions in the river (caused mainly by pollution and dam construction) meant limited success in rescuing mussel stocks, while the introduction of plastic …
Aspects Of An Interior Stream Clam Midden From 1915 At Quasqueton, Buchanan County Iowa, Dennis W. Schlicht
Aspects Of An Interior Stream Clam Midden From 1915 At Quasqueton, Buchanan County Iowa, Dennis W. Schlicht
Journal of the Iowa Academy of Science: JIAS
During clam surveys on the Wapsipinicon River in 1991 buried clams were observed in a bank of the river at Quasqueton, Buchanan County, Iowa. An interview with the landowner revealed that the clams were from a 1915 local clamming operation. Excavation and examination of many of the clams reveal interesting differences in species composition and size, when compared to more recent specimens from the river. Observations on the midden were recorded, species determinations were made and measurements were taken. Comparisons are made to two other modern surface surveys on the river. Differences were observed in both species composition and shell …
The Unionid Mussels (Mollusca: Bivalvia: Unionidae) Of Missouri River Floodplain Ditches In Fremont County Southwestern Iowa And Atchison And Holt Counties Northwestern Missouri, Ellet Hoke
Journal of the Iowa Academy of Science: JIAS
A survey of ditches in the Missouri River floodplain in southwestern Iowa and northwestern Missouri resulted in the recovery of nine unionid mollusk species. The floodplain ditches may provide valuable habitat for mussels in a region that has suffered a tremendous decrease in productive aquatic habitats over the past sixty-eight years. Additional survey activity is needed to determine the complete inventory of unionid mollusks in the area.
The Journal Of Undergraduate Research: Volume 03
The Journal Of Undergraduate Research: Volume 03
The Journal of Undergraduate Research
This is the complete issue of the South Dakota State University Journal of Undergraduate Research, Volume 3.
Blue Crabs In The Chesapeake - An Introduction To The Blue Crab, Lisa Lawrence, Vicki Clark, Jacques Van Montfrans, Susanna Musick
Blue Crabs In The Chesapeake - An Introduction To The Blue Crab, Lisa Lawrence, Vicki Clark, Jacques Van Montfrans, Susanna Musick
Reports
A classroom resource covering crab anatomy and glossary, life cycle of Callinectes sapidus, data tables, data analysis guides, and illustrations.
Bioprospecting, Philip A. Reed
Bioprospecting, Philip A. Reed
STEMPS Faculty Publications
The article discusses that the product applications of bioprospecting are almost limitless. This area of biotechnology has been labeled bioprospecting, and it is a practice that is creating worldwide controversy. Defined simply, bioprospecting is "scientific research that looks for a useful application, process, or product in nature." However, as with most biotechnologies, the definition does not address the complexities of bioprospecting. Archeologists are finding that some biotechnologies, such as the use of herbs for medicine and the use of fermentation and yeast in food products, date back 5,000 to 10,000 years (De Miranda, 2004). The four main categories of biotechnologies …
Wintering Fall-Calving Cow Pairs By Grazing Standing Corn Plants Vs. Mechanically Harvested Feeds Such As Hay Or Straw, A Comparison Of The Performance And Economics, Dale Zobell, Don Snyder, Randall Wiedmeier, Dale Meek, P. R. Schmidt, T. D. Mcniven
Wintering Fall-Calving Cow Pairs By Grazing Standing Corn Plants Vs. Mechanically Harvested Feeds Such As Hay Or Straw, A Comparison Of The Performance And Economics, Dale Zobell, Don Snyder, Randall Wiedmeier, Dale Meek, P. R. Schmidt, T. D. Mcniven
All Current Publications
No abstract provided.
Beef Quality And Yield Grading, Dale Zobell, Lyle Holmgren, Dick Whittier
Beef Quality And Yield Grading, Dale Zobell, Lyle Holmgren, Dick Whittier
All Current Publications
No abstract provided.
Girls On The Run: Preparing Girls For A Lifetime Of Self-Respect And Healthy Living, Mary Schutten
Girls On The Run: Preparing Girls For A Lifetime Of Self-Respect And Healthy Living, Mary Schutten
Mary C. Schutten
No abstract provided.
A Model For Data Collection And Reporting For Cow/Calf And Feedlot Operations, Dale Zobell, Michael Coe, Brett Bowman
A Model For Data Collection And Reporting For Cow/Calf And Feedlot Operations, Dale Zobell, Michael Coe, Brett Bowman
All Current Publications
This fact sheet evaluates identification tags used at the Utah State cow/calf ranch operation, includng the identification devices, the hardware used to record individual data, and the data collection software.