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Animal Sciences

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2006

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Articles 331 - 360 of 369

Full-Text Articles in Life Sciences

Assessment Of Sturgeon Bycatch, Bycatch Mortality And Other Regulatory Discard Mortality In Virginia’S Winter/Spring Striped Bass And Other Gill Net Fisheries, Kelly Place Jan 2006

Assessment Of Sturgeon Bycatch, Bycatch Mortality And Other Regulatory Discard Mortality In Virginia’S Winter/Spring Striped Bass And Other Gill Net Fisheries, Kelly Place

Reports

There were numerous objectives for this two year project, In general. objectives for the 2006 portion followed those proposed in 2005. The first was lo evaluate sturgeon interactions with the anchored gill net striped bass and other fisheries in the spring and the fall. The second was to evaluate sturgeon interactions in the striped bass fishery and to some extent, other anchored gill net fisheries. Third, was to determine the effects of various mesh sizes and gauges on bycatch and mesh/gauge specific size distributions. The fourth was to gather critical abundance, mortality and DNA data on sturgeon in Virginia waters. …

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The Effect Of Corn Or Soybean Hull Diets Supplemented With Dried Distillers Grain With Solubles (Ddgs) On Finishing Lamb Performance And Carcass Merit, Rob Zelinsky, Jay A. Daniel, Jeff E. Held Jan 2006

The Effect Of Corn Or Soybean Hull Diets Supplemented With Dried Distillers Grain With Solubles (Ddgs) On Finishing Lamb Performance And Carcass Merit, Rob Zelinsky, Jay A. Daniel, Jeff E. Held

South Dakota Sheep Research Reports, 2006-07

Eighty 78.1 ± 1.6 lb white-faced and brockle-faced wether and ewe lambs were used in an experiment to test the effects of soybean hulls and dried distillers grains with solubles (DDGS) on growth, feed efficiency and carcass merit. Lambs were placed on test between 79 to 105 days of age (average 92 days) and fed the experimental diets for 60 days. Each pen consisted of 10 lambs. Diets were formulated to meet or exceed NRC requirements. The diets were corn or soybean hull based and DDGS served as the protein supplement in both diets. No treatment differences were observed in …

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Testing Intervention Strategies To Reduce The Prevalence Of Lung Lesions In Lambs, Jay A. Daniel, Jeff E. Held Jan 2006

Testing Intervention Strategies To Reduce The Prevalence Of Lung Lesions In Lambs, Jay A. Daniel, Jeff E. Held

South Dakota Sheep Research Reports, 2006-07

We have previously demonstrated that lung lesions decrease average daily gain in lambs. We have also observed fall born lambs have a lower prevalence of lung lesions than spring born lambs. The different prevalence in lung lesions between spring and fall born lambs suggests that lung lesions can be prevented. Mannheimia (Pasteurella) haemolytica and/or Pasteurella multocida are present in lambs with moderate or severe lung lesions, but not in lambs with normal lung tissue. In serial slaughter studies, we observed lung lesions formed post-weaning. Therefore, we designed two studies to test possible intervention strategies to reduce the prevalence or severity …

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Effect Of Supplementing Distillers Grain Or Corn On Performance Of Cows Grazing Spring Pasture During The Breeding Season, Tyler A. Melroe, Richard J. Pruitt, George A. Perry, Jeffrey A. Clapper, Heather A. Werner Jan 2006

Effect Of Supplementing Distillers Grain Or Corn On Performance Of Cows Grazing Spring Pasture During The Breeding Season, Tyler A. Melroe, Richard J. Pruitt, George A. Perry, Jeffrey A. Clapper, Heather A. Werner

South Dakota Beef Report, 2006

In a 2 yr study 180 lactating cows (2 to 10 yr old) grazing pastures dominated by smooth bromegrass and Kentucky bluegrass near Brookings, SD received 3 supplemental treatments for 48 d beginning in mid May. Cows received 4.6 lb DM of dried distillers grains with solubles (DDGS), 4.3 lb corn DM, or no supplement daily, starting approximately 14 d prior to the start of the breeding season. Cows were bled weekly for 5 wk beginning 1 wk prior to the beginning of the treatment period. Serum was analyzed for progesterone concentration to determine the onset of cyclicity. While supplemented …

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Evaluation Of Reproduction And Blood Metabolites In Beef Heifers Fed Dried Distillers Grains Plus Solubles And Soybean Hulls During Late Gestation, Chanda L. Engel, H. H. Trey Patterson, Ron Haigh, Jason Johnson, Mindy Hubert, Brandi Perry, George A. Perry Jan 2006

Evaluation Of Reproduction And Blood Metabolites In Beef Heifers Fed Dried Distillers Grains Plus Solubles And Soybean Hulls During Late Gestation, Chanda L. Engel, H. H. Trey Patterson, Ron Haigh, Jason Johnson, Mindy Hubert, Brandi Perry, George A. Perry

South Dakota Beef Report, 2006

Dried distillers grains plus solubles (DDGS) contain a significant amount of both undegradable intake protein and fat, which have both been shown to increase reproductive performance when supplemented to heifers during gestation. The mechanisms leading to enhanced reproduction when fat or UIP are supplemented have not been fully defined. The objective of this experiment was to evaluate DDGS or soybean hulls (SBH) fed during the last trimester of gestation on circulating concentrations of growth hormone (GH) and insulin-like growth factor-I (IGF-I) and reproductive efficiency. Ninety-five crossbred heifers were grouped by expected calving date, BW, BCS, and randomly assigned to DDGS …

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Frontmatter And Contents Jan 2006

Frontmatter And Contents

Nebraska Beef Cattle Reports

ACKNOWLEDGMENTS

Appreciation is expressed to the following firms, associations, or agencies who provided grant support for research in the beef cattle program.

Abengoa Bionergy Corp., York, Nebraska
Beef Board, Centennial, Colorado
Bioniche Lifes Services, Belleville, Ontario, Canada
Cargill Corn Milling, Blair, Nebraska
Elanco Animal Health, Indianapolis, Indiana
Intervet, Millsboro, Delaware
J.C. Robinson Seed Co., Waterloo, Nebraska
Montana State University, Boseman, Montana
Nebraska Cattlemen, Inc., Lincoln, Nebraska
Nebraska Corn Board, Lincoln, Nebraska
Nutrition Physiology Corp., Amarillo, Texas
Pfizer Inc., New York, New York
Soypass Royalty Funds, University of Nebraska, Lincoln, Nebraska

Appreciation is also expressed to the following firms who provided …

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Effects Of Supplementing Beef Cows With Lipid From Whole Corn Germ, Jeremy Martin, Richard J. Rasby, Dennis R. Brink, Ron Lindquist, Duane Keisler, Stephen D. Kachman, Mark Dragastin Jan 2006

Effects Of Supplementing Beef Cows With Lipid From Whole Corn Germ, Jeremy Martin, Richard J. Rasby, Dennis R. Brink, Ron Lindquist, Duane Keisler, Stephen D. Kachman, Mark Dragastin

Nebraska Beef Cattle Reports

A two-year study was conducted with crossbred beef cows to determine whether supplementation with fat from whole corn germ either pre- or postpartum influenced ovarian activity before the breeding season, pregnancy rates, calving interval, calf performance, or serum leptin concentration. Supplements were fed for approximately 45 days before or 45 days after calving. Cows supplemented prepartum with fat from whole corn germ had shorter calving intervals. Ovarian activity before the breeding season, pregnancy rate, calf growth, and serum leptin were not different between groups.

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Effects Of Dam Nutrition On Growth And Reproductive Performance Of Heifer Calves, Jeremy Martin, Kim Vonnahme, Greg Lardy, Don C. Adams, Richard N. Funston Jan 2006

Effects Of Dam Nutrition On Growth And Reproductive Performance Of Heifer Calves, Jeremy Martin, Kim Vonnahme, Greg Lardy, Don C. Adams, Richard N. Funston

Nebraska Beef Cattle Reports

A 3-year experiment evaluated the effects of maternal nutrition on growth and reproductive performance of heifer calves. Supplementing cows with protein during late gestation resulted in heifers that were heavier at weaning and breeding, had higher pregnancy rates, and calved earlier. Allowing cows to graze meadows after calving improved calf weaning weight but not heifer reproductive performance. Heifers from cows that were fed hay after calving had reduced DMI and improved residual feed intake if their dams were supplemented with protein during gestation, but ADG and G:F were not affected by dam supplementation or spring feeding strategies.

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Digestibility Of Undegradable Intake Protein Of Feedstuffs, Joshua R. Benton, James C. Macdonald, Galen E. Erickson, Terry J. Klopfenstein, Don C. Adams Jan 2006

Digestibility Of Undegradable Intake Protein Of Feedstuffs, Joshua R. Benton, James C. Macdonald, Galen E. Erickson, Terry J. Klopfenstein, Don C. Adams

Nebraska Beef Cattle Reports

Digestibility of undegradable intake protein of subirrigated meadows, upland native range, smooth bromegrass, and other feedstuffs used in several growing trials was measured using the mobile nylon bag technique. In general, as the grazing season progressed, undegradable intake protein (UIP) digestibility of grazed forages decreased. Also, UIP digestibility was highly variable among feedstuffs. Compared to the constant 80% digestibility of UIP used by the 1996 Beef NRC, grazed and harvested forages tend to have much lower UIP digestibility values while the supplemental protein sources evaluated tend to have higher UIP digestibility values.

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Effect Of Fat And Undegradable Intake Protein In Dried Distillers Grains On Performance Of Cattle Grazing Smooth Bromegrass Pastures, James C. Macdonald, Galen E. Erickson, Terry J. Klopfenstein Jan 2006

Effect Of Fat And Undegradable Intake Protein In Dried Distillers Grains On Performance Of Cattle Grazing Smooth Bromegrass Pastures, James C. Macdonald, Galen E. Erickson, Terry J. Klopfenstein

Nebraska Beef Cattle Reports

Growing heifers grazing smooth bromegrass pastures were supplemented daily with dry distillers grains, corn bran + corn oil, or corn bran + corn gluten meal to determine the relative contributions of fat and undegradable intake protein in dried distillers grains to animal performance. For cattle supplemented from 0 to 0.75% body weight with dried distillers grains, ADG was improved by 0.14 lb for every 0.10% BW increase in dried distillers grains supplementation. Cattle supplemented with corn bran + corn gluten meal gained 38% as much as cattle supplemented with dry distillers grains while cattle supplemented with corn bran + corn …

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Influence Of Corn Hybrid And Processing Method On Digestibility And Ruminal Fermentation, Matt K. Luebbe, Galen E. Erickson, Terry J. Klopfenstein, Wayne Fithian Jan 2006

Influence Of Corn Hybrid And Processing Method On Digestibility And Ruminal Fermentation, Matt K. Luebbe, Galen E. Erickson, Terry J. Klopfenstein, Wayne Fithian

Nebraska Beef Cattle Reports

Three hybrids with different kernel traits and feeding value were selected from a previous study to determine effects of corn hybrid and processing method (high-moisture corn (HMC), or dry-rolled corn DRC)) on nutrient digestibility and ruminal fermentation. DMI, intake rate, and total time spent eating were greater for HMC than DRC. Changes in ruminal pH and pH variance were also greater for HMC compared to DRC. Total-tract nutrient digestibility was influenced by processing method and hybrid. Nutrient digestibilities were greatest for hybrid 1, and greater for HMC compared to DRC. There was a hybrid by processing method interaction for molar …

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Effect Of Corn Processing In Finishing Diets Containing Wet Distillers Grains On Feedlot Performance And Carcass Characteristics Of Finishing Steers, Kyle J. Vander Pol, Galen E. Erickson, Matthew A. Greenquist, Terry J. Klopfenstein, Thomas Robb Jan 2006

Effect Of Corn Processing In Finishing Diets Containing Wet Distillers Grains On Feedlot Performance And Carcass Characteristics Of Finishing Steers, Kyle J. Vander Pol, Galen E. Erickson, Matthew A. Greenquist, Terry J. Klopfenstein, Thomas Robb

Nebraska Beef Cattle Reports

An experiment evaluated the effects of six corn processing methods in feedlot diets containing 30% (DM basis) wet distillers grains plus solubles (WDGS). Treatments consisted of whole corn, dry-rolled corn, a dry-rolled/ high-moisture corn mix, high-moisture corn, steam flaked corn, and fine ground corn. The ADG was highest for steers receiving dry-rolled corn, high-moisture corn, or a 50:50 blend of dry-rolled and high-moisture corn. Feed conversion was best for steers receiving high-moisture corn. Interestingly, cattle fed finely ground corn or steam-flaked corn did not gain or convert as well as expected. Results indicate that there is a performance advantage obtained …

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Evaluation Of A Low Protein Distillers By-Product For Finishing Cattle, Virgil R. Bremer, Galen E. Erickson, Terry J. Klopfenstein, Kyle J. Vander Pol, Matthew A. Greenquist, Matthew L. Gibson Jan 2006

Evaluation Of A Low Protein Distillers By-Product For Finishing Cattle, Virgil R. Bremer, Galen E. Erickson, Terry J. Klopfenstein, Kyle J. Vander Pol, Matthew A. Greenquist, Matthew L. Gibson

Nebraska Beef Cattle Reports

An experiment was conducted to evaluate the effect of level of a low protein distillers by-product, Dakota Bran Cake (DBRAN), on feedlot performance and carcass characteristics of yearling steers. Diets contained 0, 15, 30, 45% DBRAN, or 30% dried distillers grains plus solubles (DDGS), replacing corn (DM basis). Final BW, ADG, and F:G improved linearly and daily DMI had a quadratic positive response as level of DBRAN in the diet increased. With the exception of HCW, there were no significant differences for carcass characteristics. The DBRAN had feeding performance similar to DDGS at the same inclusion level. Feeding DBRAN in …

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Sodium Chloride And Soybeans In Feedlot Diets, Sheryl L. Colgan, Terry L. Mader Jan 2006

Sodium Chloride And Soybeans In Feedlot Diets, Sheryl L. Colgan, Terry L. Mader

Nebraska Beef Cattle Reports

Two trials were conducted to evaluate feeding sodium chloride salt (NaCl) and soybeans to feedlot cattle in summer and winter seasons. The treatments were 1) control; 2) 1% added salt; 3) 5% added whole soybeans; and 4) the combination of 1% added salt and 5% added whole soybeans. Added salt had a tendency to decrease dry matter intake and increase water intake. Additional salt and soybeans elevated tympanic temperatures. Treatment did not have an effect on performance, carcass quality grade, or dressing percentage.

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Large-Scale Clinical Trial To Evaluate An Experimental Escherichia Coli Vaccine, Robert E. Peterson, David R. Smith, Rodney A. Moxley, Terry J. Klopfenstein, Susan Hinkley, Galen E. Erickson Jan 2006

Large-Scale Clinical Trial To Evaluate An Experimental Escherichia Coli Vaccine, Robert E. Peterson, David R. Smith, Rodney A. Moxley, Terry J. Klopfenstein, Susan Hinkley, Galen E. Erickson

Nebraska Beef Cattle Reports

A clinical trial was conducted within 19 Nebraska feedlots to evaluate effects of an E. coli vaccine on the probability to detect E. coli O157:H7 on ROPES or for cattle to be colonized by E. coli O157:H7 at the terminal rectum. Vaccinated pens of cattle were less likely to test ROPE-positive than nonvaccinated pens of cattle and a lower probability for E. coli O157:H7 colonization among vaccinated cattle compared with nonvaccinated cattle was observed. The vaccine was effective at reducing E. coli O157:H7 in the feedlot pen environment and colonization at the terminal rectum of cattle.

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Effect Of Optaflexx Dosage And Duration Of Feeding Prior To Slaughter On Feed Conversion And Carcass Characteristics, Grant I. Crawford, Galen E. Erickson, Kyle J. Vander Pol, Matthew A. Greenquist, Jeffrey Folmer, Mike Van Koevering Jan 2006

Effect Of Optaflexx Dosage And Duration Of Feeding Prior To Slaughter On Feed Conversion And Carcass Characteristics, Grant I. Crawford, Galen E. Erickson, Kyle J. Vander Pol, Matthew A. Greenquist, Jeffrey Folmer, Mike Van Koevering

Nebraska Beef Cattle Reports

Finishing steer calves were fed 0, 100, or 200 mg/head/day of Optaflexx for the final 28, 35, or 42 days of the finishing period. Steers were started on Optaflexx treatment at one-week intervals and marketed as a single group. Feeding Optaflexx to feedlot steers increased ADG, improved F:G, and increased carcass weight. Feeding 200 mg/head/day of Optaflexx improved feed conversion by 8.1% without impacting carcass characteristics. Feeding Optaflexx at 200 mg/head/d for 28 to 42 days appears beneficial when compared with feeding diets without Optaflexx.

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Effects Of Optaflexx Fed In Combination With Mga On Feedlot Heifer Performance, William A. Grififn, Galen E. Erickson, Bill Dicke, Robert J. Cooper, D. J. Jordon, William Moseley, Gary Sides, Jim S. Drouillard, Terry J. Klopfenstein Jan 2006

Effects Of Optaflexx Fed In Combination With Mga On Feedlot Heifer Performance, William A. Grififn, Galen E. Erickson, Bill Dicke, Robert J. Cooper, D. J. Jordon, William Moseley, Gary Sides, Jim S. Drouillard, Terry J. Klopfenstein

Nebraska Beef Cattle Reports

A commercial feedlot experiment was conducted using 1,807 heifers to evaluate the effects of Optaflexx fed in combination with MGA on finishing heifer performance. In heifers receiving MGA throughout the entire 126-143 day feeding period, feeding Optaflexx for the last 31-38 days increased ADG and hot carcass weight compared to heifers fed MGA but not Optaflexx. Heifers fed MGA and Optaflexx had increased DMI, improved feed efficiency and increased final live weight. Carcass quality measurements were not influenced by treatment.

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Summary Of Manure Amounts, Characteristics, And Nitrogen Mass Balance For Open Feedlot Pens In Summer Compared To Winter, William F. Kissinger, Galen E. Erickson, Terry J. Klopfenstein Jan 2006

Summary Of Manure Amounts, Characteristics, And Nitrogen Mass Balance For Open Feedlot Pens In Summer Compared To Winter, William F. Kissinger, Galen E. Erickson, Terry J. Klopfenstein

Nebraska Beef Cattle Reports

Data from 18 experiments (244 pen means) over a 10-year period were summarized in order to make a long term comparison between seasons dealing with nutrient mass balance studies and characteristics and amount of manure from open feedlot pens. The amount of manure DM increased from 10.6 lb to 20.0 lb/head finished/day from summer (May to September) to winter (November to May). Quantities of OM, ash, and N (lb/head finished/day) increased from 2.5 lb OM, 8.1 lb ash, and 0.13 lb N to 4.8 lb OM, 15.2 lb ash, and 0.22 lb N/ head finished/day from summer to winter, respectively. …

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Nitrogen Mass Balance And Cattle Performance Of Steers Fed Clinoptilolite Zeolite Clay, Dawn M. Sherwood, Galen E. Erickson, Terry J. Klopfenstein Jan 2006

Nitrogen Mass Balance And Cattle Performance Of Steers Fed Clinoptilolite Zeolite Clay, Dawn M. Sherwood, Galen E. Erickson, Terry J. Klopfenstein

Nebraska Beef Cattle Reports

A winter and a summer nitrogen mass balance experiment were conducted to analyze effects of feeding clinoptilolite zeolite clay to steers. No differences were found in steer ADG, F/G or carcass characteristics. Nitrogen mass balance and volatilization were not affected by a 1.2% addition of clinoptilolite in feedlot diets. These experiments indicate clinoptilolite zeolite clay does not have a large enough cation exchange potential to be effective in reducing N volatilization in open feedlot pens.

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Economics Of Manure Phosphorus Distribution From Beef Feeding Operations, William F. Kissinger, Galen E. Erickson, Richard K. Koelsch, Raymond E. Massey Jan 2006

Economics Of Manure Phosphorus Distribution From Beef Feeding Operations, William F. Kissinger, Galen E. Erickson, Richard K. Koelsch, Raymond E. Massey

Nebraska Beef Cattle Reports

An economic model was developed to evaluate cost and value of manure distribution. A 2,500 head feedlot was used as a case study to calculate excretion amounts from cattle fed diets with a range of phosphorus. Diet P and subsequent costs of distributing that manure were used to analyze the corresponding costs of manure P distribution, in addition to determining the required acres needed to be in compliance with a nutrient management plan (NMP) based on use of manure P by the crops grown. The model illustrated when animals are fed diets of increasing P concentration, total distribution cost increased, …

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Nebraska 2006 Beef Cattle Report Jan 2006

Nebraska 2006 Beef Cattle Report

Nebraska Beef Cattle Reports

Table of Contents

Cow/Calf
Effects of Supplementing Beef Cows with Lipid from Whole Corn Germ
Effects of Supplementing Lactating, June-calving Cows on Second-calf Pregnancy Rates
Effects of Pre- and Postpartum Nutrition on Reproduction in Spring Calving Cows and Calf Feedlot Performance
Effects of Dam Nutrition on Growth and Reproductive Performance of Heifer Calves
A System for Wintering Beef Heifers Using Dried Distillers Grains
Feeding Melengestrol Acetate to Bulls Prior to and at Puberty Alters Body Weight, and Hormone Concentration
Vascular Endothelial Growth Factor mRNA Isoforms 120 and 164 Are Differentially Regulated Prior to Ovulation
Bull Exposure, When Combined with a …

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Suspension Of Gametogenesis In Green Sea Urchins Experiencing Invariant Photoperiod, S. Anne Boettger, Michael G. Devin, Charles W. Walker Jan 2006

Suspension Of Gametogenesis In Green Sea Urchins Experiencing Invariant Photoperiod, S. Anne Boettger, Michael G. Devin, Charles W. Walker

Biology Faculty Publications

No abstract provided.

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A Switch From Polyandry To Serial Monogamy: Results From A Three Year Tagging Study Of Horseshoe Crabs In Long Island Sound, Jennifer Mattei Ph.D., Paul Goodell, Christine Depierro, Meghann Burke Jan 2006

A Switch From Polyandry To Serial Monogamy: Results From A Three Year Tagging Study Of Horseshoe Crabs In Long Island Sound, Jennifer Mattei Ph.D., Paul Goodell, Christine Depierro, Meghann Burke

Biology Faculty Publications

Part of an ongoing population study of the North American Horseshoe Crab, Limulus polyphemus, in Long Island Sound was completed during the 2003 – 2005 spawning seasons at Milford Point, in Milford, CT. Horseshoe crabs range more widely throughout Long Island Sound than expected and exhibit weak site fidelity. Animals originally tagged in Milford were found as far west as Stamford and as far east as Clinton, CT. during the 3 year study. Out of 522 female horseshoe crabs tagged in 2004 only 4 came back to spawn again at Milford Pt. in 2005. The sex ratios of tagged and …

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Gis-Based Analysis Of Ice-Breeding Seal Strandings In The Gulf Of Maine, David Harris Ph.D., Sat Gupta Jan 2006

Gis-Based Analysis Of Ice-Breeding Seal Strandings In The Gulf Of Maine, David Harris Ph.D., Sat Gupta

Faculty Publications

Phoca groenlandica (harp seals) and Cystophora cristata (hooded seals), two species of ice-breeding seals, are being sighted more frequently onshore in the Gulf of Maine since 1990, but little is known about their behavior in this ecosystem. We obtained records of 904 ice-breeding seal stranding locations in the Gulf of Maine between 1996 and 2002 from NOAA Fisheries and used a geographic information system (GIS) to conduct group-wise comparisons by species (using non-parametric techniques), and to determine the predictors of high seal-stranding density (using ordinal logistic regression analysis). Compared to harp seals, hooded seals stranded closer to deep water, farther …

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Parelaphostrongylus Odocoilei In Columbia Black-Tailed Deer From Oregon, Jack A. Mortenson, Arthur Abrams, Benjamin M. Rosenthal, Detiger Dunams, Eric P. Hoberg, Robert J. Bildfell, Richard L. Green Jan 2006

Parelaphostrongylus Odocoilei In Columbia Black-Tailed Deer From Oregon, Jack A. Mortenson, Arthur Abrams, Benjamin M. Rosenthal, Detiger Dunams, Eric P. Hoberg, Robert J. Bildfell, Richard L. Green

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Documenting the occurrence of Parelaphostrongylus odocoilei has historically relied on the morphological examination of adult worms collected from the skeletal muscle of definitive hosts, including deer. Recent advances in the knowledge of protostrongylid genetic sequences now permit larvae to be identified. Dorsal-spined larvae (DSLs) collected in 2003–2004 from the lung and feces of six Columbian black-tailed deer (Odocoileus hemionus columbianus) from Oregon were characterized genetically. The sequences from unknown DSLs were compared to those from morphologically validated adults and larvae of P. odocoilei at both the second internal transcribed spacer (ITS-2) of ribosomal DNA and the mitochondrial cytochrome …

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Associative Memory In Three Aplysiids: Correlation With Heterosynaptic Modulation, Brian A. Hoover, Hoang Nguyen, Laura Thompson, William G. Wright Jan 2006

Associative Memory In Three Aplysiids: Correlation With Heterosynaptic Modulation, Brian A. Hoover, Hoang Nguyen, Laura Thompson, William G. Wright

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Much recent research on mechanisms of learning and memory focuses on the role of heterosynaptic neuromodulatory signaling. Such neuromodulation appears to stabilize Hebbian synaptic changes underlying associative learning, thereby extending memory. Previous comparisons of three related sea-hares ( Mollusca, Opisthobranchia) uncovered interspecific variation in neuromodulatory signaling: strong in Aplysia californica, immeasureable in Dolabrifera dolabrifera, and intermediate in Phyllaplysia taylori. The present study addressed whether this interspecific variation in neuromodulation is correlated with memory of associative ( classical conditioning) learning. We differentially conditioned the tail-mantle withdrawal reflex of each of the three species: Mild touch to one side of the tail …

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Hyla Squirella (Squirrel Treefrog): Refugia., Louis A. Somma, David Serrano Jan 2006

Hyla Squirella (Squirrel Treefrog): Refugia., Louis A. Somma, David Serrano

Papers in Herpetology

HYLA SQUiREUA (Squirrel Treefrog). REFUGIA. Entomologists commonly use trap-nests to monitor cavity-nesting Hymenoptera. These trap-nests consist of 5 x 10 cm pine timber cut into 12-cm lengths. Five lengths are then stacked and strapped together. Each pIece of timber is predrilled in each side to have either a 3.2, 4.8, 6.4, 7.9, or 12.7 Iiundiameterhole, 8 cmindepth. Thus, each trap-nest consisted of five pieces of wood containing 2 holes of each diameter. They are suspended with wire from tree trunks and branches. We set these wooden traps (N = 10) at Devil's Millhopper Geological State Park, Gainesville, Alachua Co., Florida, …

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The Adaptive Value Of Aggregation Among Juvenile Caribbean Spiny Lobster: An Evaluation Using Individual-Based Modeling, Thomas W. Dolan Iii, Mark J. Butler Iv Jan 2006

The Adaptive Value Of Aggregation Among Juvenile Caribbean Spiny Lobster: An Evaluation Using Individual-Based Modeling, Thomas W. Dolan Iii, Mark J. Butler Iv

Biological Sciences Faculty Publications

Ontogenetic changes in gregariousness by pre-reproductive animals, like that observed in juvenile Caribbean spiny lobsters (Panulirus argus), may be adaptive and reflect size-specific changes in the effectiveness of aggregation in promoting survival. Alternatively, aggregation may simply result from changes in the distribution or availability of suitable habitat structure, or from other behaviors that enhance survival. There are currently two hypotheses explaining the potential benefits of gregarious behavior in juvenile spiny lobsters, both of which focus on increasing survivorship by reducing predation pressure: the group benefit hypothesis and the guide hypothesis. The group benefit hypothesis argues that aggregations of …

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Kinosternon Subrubrum Subrubrum (Eastern Mud Turtle) Predator Escape, Joseph C. Mitchell, A. C. Markham, B. D. Watts Jan 2006

Kinosternon Subrubrum Subrubrum (Eastern Mud Turtle) Predator Escape, Joseph C. Mitchell, A. C. Markham, B. D. Watts

Arts & Sciences Articles

"Known avian predators of Kinosternon subrubrum include crows and eagles (Ernst et al. 1994. Turtles of the United States and Canada, Smithsonian Inst. Press, Washington, DC; Mitchell 1994. The Reptiles of Virginia, Smithsonian Inst. Press, Washington, DC)..."

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2005 Annual Report: Migratory Bird Conservation Commission Jan 2006

2005 Annual Report: Migratory Bird Conservation Commission

United States Fish and Wildlife: Staff Publications

Report of the Migratory Bird Conservation Commission for the Fiscal Year 2005:
Approvals During Fiscal Year 2005
Migratory Bird Conservation Fund
Summary of Fiscal Year 2005 MBCF Land Acquisitions
New National Wildlife Refuge Boundary Approvals
Membership of the Migratory Bird Conservation Commission
Map Showing National Migratory Bird Refuge Areas
Map Showing Waterfowl Production Areas by State and County
Notes on Tables One and Two
Table One––National Migratory Bird Refuge Areas
Table Two––Waterfowl Production Areas by State and County
North American Wetlands Conservation Fund
Table Three––U.S. Wetland Conservation Proposals Approved by the Migratory Bird Conservation Commission for FY 2005
Table Four––Canadian …

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