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In Memory Of Olin Sewall Pettingill Mar 2004

In Memory Of Olin Sewall Pettingill

Nebraska Bird Review

In Memory of Olin Sewall Pettingill

Olin Sewall Pettingill, Jr., Ph.D., renowned ornithologist and teacher, passed away December 11, 2001, in Bedford, Texas. He was 94.

Dr. Pettingill was born in Belgrade, Maine, on October 30, 1907. He graduated from Bowdoin College in 1930 and received a Ph.D. from Cornell University in 1933. Honorary doctor of science degrees were awarded by Bowdoin College in 1956, Colby College in 1979, and the University of Maine in 1982.

Dr. Pettingill taught ornithology at Carleton College for 17 years and at the University of Michigan Biological Station for 35 summers. He was director …


Effects Of Management Practices On Grassland Birds: Greater Sage-Grouse, Mary M. Rowland Mar 2004

Effects Of Management Practices On Grassland Birds: Greater Sage-Grouse, Mary M. Rowland

United States Geological Survey: Effects of Management Practices on Grassland Birds

Information on the habitat requirements and effects of habitat management on Greater Sage-Grouse was summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the current range of Greater Sage-Grouse (adapted from Schroeder et al. 2004). Although birds may be observed outside the breeding range indicated, the maps are intended to show areas where managers might concentrate their attention. It may be ineffectual to manage habitat at a site for a species that rarely occurs in an area. The species account begins with a brief capsule statement, which provides the fundamental components …


Age-Of-Dam Adjustment Factors For Birth And Weaning Weight Records Of Beef Cattle: A Review, Janice M. Rumpf, L. Dale Van Vleck Feb 2004

Age-Of-Dam Adjustment Factors For Birth And Weaning Weight Records Of Beef Cattle: A Review, Janice M. Rumpf, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Age-of-dam adjustment factors are used to pre-adjust birth and weaning weight data for national beef cattle genetic evaluations. Adjustments are used in order to make the means of the different age-of-dam subclasses similar so that a fair comparison of animals can be performed. A review was made of various research studies that have estimated age-of-dam adjustment factors for birth weight and weaning weight of beef cattle. In general, birth weight age-of-dam adjustment factors are the same across the sexes, but weaning weight age-of-darn adjustment factors differ across the sexes, with heifer calves receiving smaller adjustments than their male counterparts. Additionally, …


Cheloniidae (Marine Turtle) Nest Predation, John Woolard, Richard M. Engeman, Henry T. Smith, John Griner Feb 2004

Cheloniidae (Marine Turtle) Nest Predation, John Woolard, Richard M. Engeman, Henry T. Smith, John Griner

United States Department of Agriculture Wildlife Services: Staff Publications

On 19 June 2003 at 0217 h, an opossum (Didelphis virginiana) was observed for 10 min while digging into a marine turtle nest and eating 4 eggs on the beach at St. Lucie Inlet Preserve State Park (SLIPSP) on Jupiter Island, Florida. The predation event was observed using night vision equipment as part of nightly patrols to protect turtle nests from raccoon (Procyon lotor) and armadillo (Dasypus noverncinctus) predation during the nesting season. After verification of an ongoing predation event, the opossum was euthanized and removed. Prior to implementing predator removal on this beach, …


Genetic Relationships Between Sex-Specific Traits In Beef Cattle: Mature Weight, Weight Adjusted For Body Condition Score, Height And Body Condition Score Of Cows, And Carcass Traits Of Their Steer Relatives, K. A. Nephawe, L. V. Cundiff, M. E. Dikeman, J. D. Crouse, L. Dale Van Vleck Feb 2004

Genetic Relationships Between Sex-Specific Traits In Beef Cattle: Mature Weight, Weight Adjusted For Body Condition Score, Height And Body Condition Score Of Cows, And Carcass Traits Of Their Steer Relatives, K. A. Nephawe, L. V. Cundiff, M. E. Dikeman, J. D. Crouse, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Data from the first four cycles of the Germplasm Evaluation Program at the U.S. Meat Animal Research Center (USMARC) were used to investigate genetic relationships between mature weight (MW, n = 37,710), mature weight adjusted for body condition score (AMW, n = 37,676), mature height (HT, n = 37,123), and BCS (n = 37,676) from 4- to 8-yr old cows (n = 1,800) and carcass traits (n = 4,027) measured on their crossbred paternal half-sib steers. Covariance components among traits were estimated using REML. Carcass traits were adjusted for age at slaughter. Estimates of heritability for hot carcass weight (HCWT); …


Fish Stock And Fishery Enhancement In Western Australia. A Discussion Paper., Department Of Fisheries Feb 2004

Fish Stock And Fishery Enhancement In Western Australia. A Discussion Paper., Department Of Fisheries

Fisheries Management Papers

The objective of this paper is to propose a process that will allow the decision makers to objectively assess the appropriateness, benefits and costs of any stock enhancement proposal under Ecologically Sustainable Development (ESD) principles. To this end, this paper sets out a conceptual framework for assessment of stock enhancement projects, putting stock enhancement within the wider framework of fisheries and ecosystem management strategies, and their assessment, in Western Australia.


The Hardy Inlet Estuarine Fishery Management Issues And Options, Department Of Fisheries Feb 2004

The Hardy Inlet Estuarine Fishery Management Issues And Options, Department Of Fisheries

Fisheries Management Papers

This paper presents information available on fish resources in the Hardy Inlet/Blackwood River system, and discusses the key management matters and likely impacts of a number of possible management measures.


Effects Of Management Practices On Grassland Birds: Prairie Falcon, John P. Delong, Karen Steenhof Feb 2004

Effects Of Management Practices On Grassland Birds: Prairie Falcon, John P. Delong, Karen Steenhof

United States Geological Survey: Effects of Management Practices on Grassland Birds

Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 4,000 published and unpublished papers. A range map is provided to indicate the breeding, year-round, and nonbreeding ranges in the United States and southern Canada. Although birds frequently are observed outside the breeding range indicated, the maps are intended to show areas where managers might concentrate their attention. It may be ineffectual to manage habitat at a site for a species that rarely occurs in an area. The species account begins with a brief capsule statement, which provides the fundamental …


Effects Of Management Practices On Grassland Birds: Golden Eagle, John P. Delong Feb 2004

Effects Of Management Practices On Grassland Birds: Golden Eagle, John P. Delong

United States Geological Survey: Effects of Management Practices on Grassland Birds

Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 4,000 published and unpublished papers. A range map is provided to the breeding, year-round, and nonbreeding ranges in the United States and southern Canada. Although birds frequently are observed outside the breeding range indicated, the maps are intended to show areas where managers might concentrate their attention. It may be ineffectual to manage habitat at a site for a species that rarely occurs in an area. The species account begins with a brief capsule statement, which provides the fundamental components …


Effects Of Management Practices On Grassland Birds: Merlin, Paul M. Konrad Feb 2004

Effects Of Management Practices On Grassland Birds: Merlin, Paul M. Konrad

United States Geological Survey: Effects of Management Practices on Grassland Birds

Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the breeding, year-round, and nonbreeding ranges in the United States and southern Canada. Although birds frequently are observed outside the breeding range indicated, the maps are intended to show areas where managers might concentrate their attention. It may be ineffectual to manage habitat at a site for a species that rarely occurs in an area. The species account begins with a brief capsule statement, which provides the fundamental …


Effects Of Naturalized Population Of Yellow-Flowered Alfalfa On Species Richness And Biomass Production Of Native Rangeland, Lan Xu, Arvid Boe, Patricia Johnson, Kevin Kephart Jan 2004

Effects Of Naturalized Population Of Yellow-Flowered Alfalfa On Species Richness And Biomass Production Of Native Rangeland, Lan Xu, Arvid Boe, Patricia Johnson, Kevin Kephart

South Dakota Beef Report, 2004

The occurrence of naturalized yellow-flowered alfalfa on private and adjacent public rangeland in northwestern South Dakota presents a dilemma. Its ability to reproduce naturally in native rangeland demonstrates its value for rehabilitating severely depleted rangelands and increasing forage production and quality, soil carbon and soil nitrogen levels. On the other hand, the spread of alfalfa into native rangeland potentially threatens native biological diversity and may result in changes in ecological processes and functions (e.g., alteration of pools and flows of energy and nutrients). A study was initiated on the Grand River National Grassland in 2003 to determine the effects of …


Ability Of Cidrs Or Melengestrol Acetate To Initiate Estrous Cycles In Early Postpartum Beef Cows, G. A. Perry, T. W. Geary Jan 2004

Ability Of Cidrs Or Melengestrol Acetate To Initiate Estrous Cycles In Early Postpartum Beef Cows, G. A. Perry, T. W. Geary

South Dakota Beef Report, 2004

Postpartum anestrous interval in beef cows is a major factor contributing to reproductive failure during a defined breeding season. Our objectives were to determine the ability of a controlled internal drug-releasing device (CIDR), or melengestrol acetate (MGA) to induce ovulation and to eliminate short estrous cycles. Multiparous beef cows (n = 75) were equally assigned by age, days postpartum, body condition, and body weight to one of three treatments: CIDR, MGA, or control. All cows were fed carrier (2 lbs•cow-1•day-1) with MGA (0.25 mg/lb) or without MGA for 7 days (day -6 to 0). On day -6, CIDR were inserted …


Effect Of Total Dissolved Solids And Sulfates In Drinking Water For Growing Steers, Hubert H. Patterson, Patricia S. Johnson, Wiliam B. Epperson, R. D. Haigh Jan 2004

Effect Of Total Dissolved Solids And Sulfates In Drinking Water For Growing Steers, Hubert H. Patterson, Patricia S. Johnson, Wiliam B. Epperson, R. D. Haigh

South Dakota Beef Report, 2004

A study was conducted to determine the effects of implants and transportation on the metabolic status of feedlot steers. Steers (n = 28) were sorted by body weight, allocated into light or heavy blocks, and randomly assigned to one of two treatments. Treatments included non-implanted controls (CON) and steers implanted with Synovex Plus 70 d prior to harvest (IMP). Jugular blood and muscle biopsy samples (longissimus dorsi (LD) and semimembranosis (SM)) were collected 70 d post-implant, prior to transit. Steers were transported to Schuyler, NE, where blood and biopsy sampling was repeated. After harvest, carcass data were collected and muscle …


Effects Of An Anabolic Implant And Transport On Metabolic Status And Muscle Traits Of Feedlot Steers, Josh W. Mccarthick, Robbit H. Pritchard, Simone M. Holt, Jeffery A. Clapper Jan 2004

Effects Of An Anabolic Implant And Transport On Metabolic Status And Muscle Traits Of Feedlot Steers, Josh W. Mccarthick, Robbit H. Pritchard, Simone M. Holt, Jeffery A. Clapper

South Dakota Beef Report, 2004

A study was repeated over 2 years to determine the effect of feeding different levels of dry distillers grains with solubles (DDGS) and wet distillers grains with solubles (WDGS) on the performance of finishing cattle. In each year, 120 steers (756 ± 22 lb) were weighed, and randomly allocated to 15 pens. The pens were then assigned to one of five treatments: 1) corn-soybean meal (CON); 2) 20% DDGS; 3) 20% WDGS; 4) 40% DDGS; or 5) 40% WDGS. The basal diet consisted of 10% alfalfa hay, 4% molasses, 2% supplement, 10.5% SBM and 73.5% cracked corn. The WDGS and …


Getting More From Forages, Garry D. Lacefield Jan 2004

Getting More From Forages, Garry D. Lacefield

Forage Symposium at the Kentucky Cattlemen’s Convention

In human endeavors, results are usually highly correlated with investments in terms of thought, time, effort, and a certain amount of money. In particular, the best and most profitable forage programs have had the most thought put into them. Top producers strive to continue to improve their operations by developing strategies, practices, and procedures that will result in “GETTING MORE FROM FORAGES”.


Composition And Nutritive Value Of Corn Co-Products From Dry Milling Ethanol Plants, Simone M. Holt, Robbi H. Pritchard Jan 2004

Composition And Nutritive Value Of Corn Co-Products From Dry Milling Ethanol Plants, Simone M. Holt, Robbi H. Pritchard

South Dakota Beef Report, 2004

The South Dakota ethanol industry is rapidly expanding. As a direct result of this expansion it is expected that in excess of 500,000 tons of corn co-products will be available to livestock enterprises annually as a feed source. Processing methods are, in general terms, similar among dry milling ethanol plants. However, newer technology and small deviations of methods can alter the nutritive value of the co-products. Subsequently, diet formulations using general nutritive values may be inaccurate and cause production inefficiencies. The objective of this research project was to characterize the composition and nutritive value of corn co-products produced from several …


A Large-Sample Qtl Study In Mice: I. Growth, Joao L. Rocha, Eugene J. Eisen, L. Dale Van Vleck, Daniel Pomp Jan 2004

A Large-Sample Qtl Study In Mice: I. Growth, Joao L. Rocha, Eugene J. Eisen, L. Dale Van Vleck, Daniel Pomp

Department of Animal Science: Faculty Publications

By use of long-term selection lines for high and low growth, a large-sample (n = ~1,000 F2) experiment was conducted in mice to further understand the genetic architecture of complex polygenic traits. In combination with previous work, we conclude that QTL analysis has reinforced classic polygenic paradigms put in place prior to molecular analysis. Composite interval mapping revealed large numbers of QTL for growth traits with an exponential distribution of magnitudes of effects and validated theoretical expectations regarding gene action. Of particular significance, large effects were detected on Chromosome (Chr) 2. Regions on Chrs 1, 3, 6, 10, …


A Large-Sample Qtl Study In Mice: Ii. Body Composition, Joao L. Rocha, Eugene J. Eisen, L. Dale Van Vleck, Daniel Pomp Jan 2004

A Large-Sample Qtl Study In Mice: Ii. Body Composition, Joao L. Rocha, Eugene J. Eisen, L. Dale Van Vleck, Daniel Pomp

Department of Animal Science: Faculty Publications

Using lines of mice having undergone long-term selection for high and low growth, a large-sample (n = ~1,000 F2) experiment was conducted to gain further understanding of the genetic architecture of complex polygenic traits. Composite interval mapping on data from male F2 mice (n = 552) detected 50 QTL on 15 chromosomes impacting weights of various organ and adipose subcomponents of growth, including heart, liver, kidney, spleen, testis, and subcutaneous and epididymal fat depots. Nearly all aggregate growth QTL could be interpreted in terms of the organ and fat subcomponents measured. More than 25% of QTL detected map …


2004 Nebraska Swine Report Jan 2004

2004 Nebraska Swine Report

Nebraska Swine Reports

Contents

Nutrition
Body Composition, Protein Deposition, and Efficiency of Lysine Utilization of Growing Pigs Fed Crystalline or Protein-Bound Lysine
Dietary Antimicrobials in a Wean-to-Finish Facility
Update on Omega-3 Fatty Acids and Litter Size in Swine
Effects of Sow Dietary Glutamine Supplementation on Sow and Litter Performance, Subsequent Weanling Pig Performance, and Intestinal Development after an Immune Challenge
Energy and Nitrogen Utilization of Corn Rootworm Protected Corn (Event MON 863) and Similar Non-Transgenic Corn in Young Pigs
Effect of Increasing Dietary Crude Protein Concentration on Growth Performance and Serum Insulin-Like Growth Factor-I Concentration

Genetics
Different Biological Responses of Pigs of Two …


Comparison Of Longhorn- And Red Poll-Sired Calves From Crossbred Dams Calving At Two Or Three Years Of Age, X H. Liu, A Perez Marquez, L. V. Cundiff, L. D. Van Vleck Jan 2004

Comparison Of Longhorn- And Red Poll-Sired Calves From Crossbred Dams Calving At Two Or Three Years Of Age, X H. Liu, A Perez Marquez, L. V. Cundiff, L. D. Van Vleck

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Calving difficulty, survival from birth to weaning, birth weight, and weaning weight of 167 calves and carcass traits of 88 cattle (63 for adjusted fat thickness) were compared for progeny of Red Poll and Longhorn bulls mated to crossbred cows that calved at 2 or 3 yr of age. Results indicated that Longhornsired calves required 28% less assistance at calving than Red Poll-sired calves when dams calved at 2 yr of age (P<0.05), but there was no difference between Red Poll- and Longhorn-sired calves for calving difficulty with 3- yr-old cows. Red Poll-sired calves had significantly greater birth and weaning BW than did Longhorn-sired calves for 2-yrold dams. Significant differences attributable to sire breed were found only for bone percentage of progeny of 3-yr-old dams, but not for carcass weight, fat thickness, longissimus area, USDA quality grades, and percentages retail product, fat trim, or bone. There was a significant interaction between sire breed and age of dam only for calving difficulty. Within sire breed, calving difficulty of 2- yr-old dams was greater than that for 3- yr-old dams, and calves from 2-yr-old dams also were significantly lighter at weaning than were calves from 3-yr-old dams (P<0 .01).


A New Subspecies Of Cicindela Nevadica Leconte (Coleoptera: Carbidae: Cicindelinae) From The Badlands Of South Dakota, Stephen M. Spomer Jan 2004

A New Subspecies Of Cicindela Nevadica Leconte (Coleoptera: Carbidae: Cicindelinae) From The Badlands Of South Dakota, Stephen M. Spomer

University of Nebraska State Museum: Entomology Papers

A new subspecies of Cicindela nevadica LeConte, Cicindela nevadica makosika Spomer, is described from the South Dakota Badlands. Geographically, the population occurs at the periphery of the range of C. nevadica knausii Leng. However, this new population is geographically isolated from the nearest C. n. knausii populations, which occur ca. 100 air miles north and over 100 air miles south. Phenotypically, C. n. makosika appears most similar to C. n. tubensis Cazier from northeast Arizona. A possible threat to this population is habitat destruction by cattle.


Agroforestry, Elephants, And Tigers: Balancing Conservation Theory And Practice In Human-Dominated Landscapes Of Southeast Asia, Philip J. Nyhus, R L. Tilson Jan 2004

Agroforestry, Elephants, And Tigers: Balancing Conservation Theory And Practice In Human-Dominated Landscapes Of Southeast Asia, Philip J. Nyhus, R L. Tilson

Faculty Scholarship

Large mammal populations theoretically are best conserved in landscapes where large protected areas are surrounded by buffer zones, connected by corridors, and integrated into a greater ecosystem. Multi-use buffer zones, including those containing complex agroforestry systems, are promoted as one strategy to provide both economic benefits to people and conservation benefits to wildlife. We use the island of Sumatra, Indonesia to explore the benefits and limitations of this strategy. We conclude that conservation benefits are accrued by expanding the habitat available for large mammals but more attention needs to be focused on how to reduce and respond to human–wildlife conflict …


Evaluation Of Feeding Varying Levels Of Wet Distillers Grains With Solubles As Compared To Dry Distilelrs Grains With Solubles To Finishing Steers, Kristina S. Mateo, Kent E. Tjardes, Cody L. Wright, Tanya J. Koger, Bradley D. Rops Jan 2004

Evaluation Of Feeding Varying Levels Of Wet Distillers Grains With Solubles As Compared To Dry Distilelrs Grains With Solubles To Finishing Steers, Kristina S. Mateo, Kent E. Tjardes, Cody L. Wright, Tanya J. Koger, Bradley D. Rops

South Dakota Beef Report, 2004

A study was conducted to determine the effects of implants and transportation on the metabolic status of feedlot steers. Steers (n = 28) were sorted by body weight, allocated into light or heavy blocks, and randomly assigned to one of two treatments. Treatments included non-implanted controls (CON) and steers implanted with Synovex Plus 70 d prior to harvest (IMP). Jugular blood and muscle biopsy samples (longissimus dorsi (LD) and semimembranosis (SM)) were collected 70 d post-implant, prior to transit. Steers were transported to Schuyler, NE, where blood and biopsy sampling was repeated. After harvest, carcass data were collected and muscle …


The Ecology And Natural History Of The Northern Leopard Frog, Rana Pipiens Schreber, In West Virginia, William Bradley Sutton Jan 2004

The Ecology And Natural History Of The Northern Leopard Frog, Rana Pipiens Schreber, In West Virginia, William Bradley Sutton

Theses, Dissertations and Capstones

The purpose of this study was to gather ecological and life history data for the Northern Leopard Frog, Rana pipiens Schreber, in West Virginia. In Chapter 1, natural history data, such as morphometrics (larval and adult), dorsal coloration, and emergence time were recorded. In Chapter 2, it was discovered that Aeromonas hydrophila and Pseudomonas ssp. skin infections affecting R. pipiens could be identified using BIOLOG analysis. The scope of Chapter 3 was to analyze habitat partitioning between 3 sympatric anurans (R. pipiens, R. catesbeiana, and R. clamitans melanota). The following habitat partitioning gradient was discovered. Rana …


Minnesota Banded Darters (Etheostoma Zonale) Exhibit A High Degree Of Genetic Similarity In Mitochondrial Dna Sequences Occurrence, Jean Porterfield, Molly Fee, Jessica Theorin Jan 2004

Minnesota Banded Darters (Etheostoma Zonale) Exhibit A High Degree Of Genetic Similarity In Mitochondrial Dna Sequences Occurrence, Jean Porterfield, Molly Fee, Jessica Theorin

Journal of the Minnesota Academy of Science

Hylogeography, or the historical interpretation of population genetic data, is a useful tool for addressing historical processes like the colonization history of organisms. North American freshwater fishes have experienced glacial ebb and flow in their relatively recent past (as little as 10,000 years before present in Minnesota), and studies of variation in intraspecific DNA sequences of these fishes can shed light on their radiations into previously glaciated areas. This study assessed intraspecific variation in two mitochondrial genes of the banded darter (Etheostoma zonale) from seven Minnesota localities. A high degree of similarity was found among all individuals in the study. …


Renesting Decisions And Annual Fecundity Of Female Dickcissels (Spiza Americana) In Illinois, Jeffery W. Walk, Kevin Wentworth, Eric L. Kershner, Eric K. Bollinger, Richard E. Warner Jan 2004

Renesting Decisions And Annual Fecundity Of Female Dickcissels (Spiza Americana) In Illinois, Jeffery W. Walk, Kevin Wentworth, Eric L. Kershner, Eric K. Bollinger, Richard E. Warner

Faculty Research & Creative Activity

T.-Renesting decisions and annual fecundity are crucial for interpreting other demographic information, yet are infrequently reported. We used radiotelemetry to monitor female Dickcissels (Spiza americana) throughout the 1999 and 2000 breeding seasons in south- eastern Illinois. Overall fecundity (regardless of whether females remained in the study area throughout the breeding season) was 0.61 ? 0.13 female fledglings per year. Of females that re- mained within the study area, 94% fledged young (1.25 ? 0.15 female fledglings per year). Most females (62%) that experienced nest failure emigrated from the study area (moved >10 km) in 2.8 ? 0.6 days; others (36%) …


Unusual Behavior By Bison, Bison Bison, Toward Elk, Cervus Elaphus, And Wolves, Canis Lupus, L. David Mech, Rick T. Mcintyre, Douglas W. Smith Jan 2004

Unusual Behavior By Bison, Bison Bison, Toward Elk, Cervus Elaphus, And Wolves, Canis Lupus, L. David Mech, Rick T. Mcintyre, Douglas W. Smith

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Incidents are described of Bison (Bison bison) in Yellowstone National Park mauling and possibly killing a young Elk (Cervus elaphus) calf, chasing wolves (Canis lupus) off Elk they had just killed or were killing, and keeping the wolves away for extended periods. During one of the latter cases, the Bison knocked a wolf-wounded Elk down. Bison were also seen approaching wolves that were resting and sleeping, rousting them, following them to new resting places and repeating this behavior. These behaviors might represent some type of generalized hyper-defensiveness that functions as an anti-predator strategy.


Natural History And Sexual Dimorphism Of The Eastern Hellbender, Cryptobranchus A. Alleganiensis, Robert Makowsky Jan 2004

Natural History And Sexual Dimorphism Of The Eastern Hellbender, Cryptobranchus A. Alleganiensis, Robert Makowsky

Theses, Dissertations and Capstones

The Eastern Hellbender’s natural history and morphology was examined. Field studies were done to examine the efficacy of different techniques (focusing on capturing larva) and diet analysis. Lab studies were done to determine if any sexual dimorphism exists in hellbenders using simple measurements (and ratios) and if this dimorphism could be used to reliably determine gender. Field studies were inconclusive due to the inability to find a reliable sample because of record rainfall. Lab studies revealed that a dimorphism does exist for one ratio (TG/TL, P=.048) and for several measurements. These measurements alone were not applicable for determining gender. …


2004 South Dakota Beef Report, Department Of Animal And Range Sciences, South Dakota State University, Agricultural Experiment Station, South Dakota State University, Cooperative Extension Service, South Dakota State University Jan 2004

2004 South Dakota Beef Report, Department Of Animal And Range Sciences, South Dakota State University, Agricultural Experiment Station, South Dakota State University, Cooperative Extension Service, South Dakota State University

South Dakota Beef Report, 2004

This is the 2004 South Dakota Beef Report. The articles published in this report summarize many of the beef cattle research activities conducted at South Dakota State University during 2004. The articles in this report have many levels of application. Some information has immediate application for your farm, ranch, or agribusiness. The articles include information on nutrition, feed management, reproductive management, health, growth and development, and economics of the cattle and beef industry in South Dakota.


Demographics And The Ecological Role Of The Channel Catfish (Ictalurus Punctatus) In Commercially Exploited And Unexploited Reaches Of The Wabash River With Implications For The Flathead Catfish (Pylodictis Olivaris), Robert Colombo Jan 2004

Demographics And The Ecological Role Of The Channel Catfish (Ictalurus Punctatus) In Commercially Exploited And Unexploited Reaches Of The Wabash River With Implications For The Flathead Catfish (Pylodictis Olivaris), Robert Colombo

Faculty Research & Creative Activity

Catfish are a major component of the Wabash River fish assemblage and are commercially fished below river kilometer (Rkm) 500. From Rkm 322 through 499 the commercial fishery is subjected only to Indiana fishing regulations. In this reach of river, there is a 254-mm minimum total length limit on both sport and commercially harvested catfish. Below RM 322, the Wabash River forms the state boundary of Indiana and Illinois. In this region of river there are two different length limits on commercially harvested catfish with Indiana having a 254-mm length limit and Illinois having a 381-mm length limit. There is …