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Parental Care In Sphaerium Striatinum Lamarck: Evidence For Retention Of Competent Offspring, Mark Beekey, Ronald H. Karlson, Alyse R. Greenberg

Biology Faculty Publications

The timing of offspring release is a fundamental turning point in the life history of any organism. It represents the end to many of the most costly forms of parental care (e.g., provisioning of nutrients for developing eggs and zygotes) and the beginning of an independent life for the offspring. Generally temporal variation in this event is attributed to a variety of physiological and evolutionary trade-offs. Here we examine the retention of offspring in the freshwater clam Sphaerium striatinum Lamarck. Brooded offspring are typically not released into the environment until they are 4.0 mm shell length (SL). We provide evidence …

An Analysis Of Migratory Behavior Physiological Condition And Life History Strategy In The Salamanders Ambystoma Mabeei And A. Opacum In Southeastern Virginia, Michael W. Mccoy

Biological Sciences Theses & Dissertations

Ambystoma mabeei is listed as threatened in Virginia due to its rarity and susceptibility to urbanization and poor forestry practices. The goal of this study was to identify factors that may affect the persistence of A. mabeei in Virginia by studying the life history and ecology of A. mabeei and its syntopic congener A. opacum. This information will contribute to the knowledge of life history variation within Ambystomatidae and will be critical for the development of a comprehensive management plan for A. mabeei. Population sizes of the two species and the proximate factors responsible for initiating breeding migrations were determined …

Effects Of Genetic Type And Protein Levels On Growth Of Swine, O.W. Robison, L. L. Christian, R. Goodwin, R. K. Johnson, J. W. Mabry, R. K. Miller, M. D. Tokach

Department of Animal Science: Faculty Publications

A total of 1,588 pigs representing six genetic lines were included in this study. These lines were selected to represent a wide range of biological types for appetite, rate and composition of gain, and meat quality traits. Each line was fed four different diets differing in lysine content. Barrows and gilts were used in the experiment, and pigs were randomly assigned to come off test at one of three weights (113.6, 131.8, or 150 kg). Rates of increase in weight, backfat thickness, and longissimus muscle area were essentially linear. Genetic type and diet influenced (P < .05) rates of change in weight, backfat thickness, and longissimus muscle area and 10th rib fat depth, carcass longissimus muscle area, and dressing percentage. Genetic type × diet interactions were significant for weight change and 10th rib fat. As off-test-weight class increased fat and longissimus muscle area increased in linear fashion. In general, interactions associated with diet resulted from feeding the diet lowest in lysine. There was little evidence of genetic type × diet interactions. If those interactions that tested significant are real, they are a result of extremes in both genetic type (high fatness) and lysine level (low). Slaughtering pigs at heavier weights results in no change in rate of gain over the feeding period and linear increases in longissimus muscle area and backfat thickness.

Burrow Morphology And Behavior Of The Mud Shrimp Upogebia Omissa (Decapoda: Thalassinidea: Upogebiidae), Vania Rodrigues Coelho, Roland Arthur Cooper, Sergio De Almeida Rodrigues

Collected Faculty Scholarship

The burrow morphology, burrowing behavior and feeding mechanisms of the thalassinidean shrimp Upogebia omissa were studied. Twenty burrow casts were made in situ with epoxy resin, and an overall 'Y' shape was most frequently observed. Several burrows consisted of a single, oblique tunnel; burrow diameter was positively correlated with burrow length, maximum depth and distance between openings. Additionally, burrow length was positively associated with maximum depth, indicating that as burrow length increased burrow depth increased; i.e. burrows spread vertically rather than horizontally. Total sediment displacement by the burrows accounted for 2.6 % of sediment to a depth of 30 cm. …

Swine Nutrition Guide, Duane E. Reese, Robert C. Thaler, Michael C. Brumm, Austin J. Lewis, Phillip S. Miller, George W. Libal

Department of Animal Science: Faculty Publications

This publication is a revision of the previous swine nutrition publication prepared by the University of Nebraska and South Dakota State University. The focus of the publication continues to be on nutrient recommendations for swine. Specific factors (nutritional, environmental and managerial) that affect nutrient recommendations (Figure 1) have been considered and discussed. We believe that the identification and description of the factors in Figure 1 provide the framework for the nutrient recommendations presented in Tables 11 to 16. Industry advisors representing various facets of the pork industry were recruited to review and challenge the concepts incorporated in this publication. Also, …

2000 Semi-Annual Report, Various Authors

Annual Reports

No abstract provided.

Aquaculture Plan For The Recherche Archipelago, Fisheries Western Australia.

Fisheries Management Papers

Land supply and land cost for aquaculture may become a limiting factor in the foreseeable future. At present, adequate appropriately zoned land is available at reasonable cost. The most prospective land for aquaculture in or near Esperance is where suitable zoned land occurs over saline ground water aquifers or adjacent to the coast. Careful site selection would be necessary to ensure water supply, waste water disposal, services and operational space can be achieved at reasonable cost.

Environmental Guidelines For New And Existing Piggeries, A Latto, John Noonan, R. J. Taylor

Bulletins 4000 -

These guidelines apply to the management of Western Australia piggeries in Western Australia, including intensive Growing pigs under intensive conditions where the and extensive operations, straw-based housing and animals spend their entire life cycle indoors, is an combinations of these (otherwise referred to as semi- important part of the Western Australian and intensive housing).

1999 Annual Report, Various Authors

Annual Reports

No abstract provided.

2000 Annual Report, Various Authors

Annual Reports

No abstract provided.

Bulletin 4422 - Exotic Diseases - Cattle, Agriculture Western Australia

Bulletins 4000 -

An exotic disease is a disease that is not present in Australia.

If an exotic disease did occur in Australia it would cause· production losses, stock deaths and stop exports of primary production. When export markets are lost they can only be re-established once it is proven the disease is eradicated

Aquaculture Plan For The Houtman Abrolhos Islands, Fisheries Western Australia

Fisheries Management Papers

The objective of this aquaculture plan is to : Provide a sound basis for developing a new aquaculture industry in the Abrolhos Islands, while at the same time conserving the unique environment of the islands for present and future generations, and minimising conflict between aquaculture and existing and future users of the islands.

Feeding Habits Of Young-Of-Year Striped Bass, Morone Saxatilis, And White Perch, Morone Americana, In Lower James River, Va, Paul J. Rudershausen, Joseph G. Loesch

Virginia Journal of Science

A total of 188 young-of-year (YOY) striped bass, Morone saxatilis, and 199 YOY white perch, Morone americana, were collected by pushnet, seine and trawl during 24-hour periods from June through August, 1992 in lower James River, Virginia. The purpose was to identify prey and temporal and spatial feeding habits. Copepods were the most numerous prey of both species. Fishes and mysids comprised the largest volumetric percentage of diets of striped bass and white perch, respectively. Using an index of relative importance, leptodorids and copepods were the most important prey of striped bass and white perch, respectively. Both species …

Green Sea Turtle (Chelonia Mydas) Hatchlings Success: The Effects Of Artificial Lights And Other Human Impacts, Hui-Yu Tracy Liang

UNLV Theses, Dissertations, Professional Papers, and Capstones

Sea turtles appeared more than 200 million years ago in the late Triassic period. They grow very slowly, taking an average of 25 years to reach sexual maturity, with a life span averaging 40-50 years. From May to October green sea turtles (Chelonia mydas) emerge during the night and follow light cues toward the sea. Recently, beachfront development has increased hatchling mortality rate. When hatchlings emerge from nest, high densities of artificial lights lead them toward the land where they either desiccate and die, or are preyed upon. Short-wavelength high intensity light and the distance of artificial light are the …

Defining Failure Of Passive Transfer In South Dakota Beef Calves, A. K. Courtney, W. B. Epperson, T. A. Wittig, R. J. Pruitt

South Dakota Beef Report, 2000

Failure of calves to ingest and absorb immunoglobulin from colostrum is a risk factor for illness and decreased performance. Blood samples were taken from 752 calves at three SDSU research units. Total protein in blood, closely correlated to colostral immunoglobulin absorption, was determined and calf health records were collected. Using this data, a classification table of sensitivity and specificity was constructed to determine the relationship between total protein and calf illness and to classify calves as having adequate colostral absorption or inadequate colostral absorption (failure of passive transfer). Along with sensitivity and specificity, positive and negative likelihood ratios were calculated …

The Influence Of Body Weight And Marbling Epd On The Relationship Of Intramuscular Fat Content And The Value Of Lean Retail Product In Serially Slaughtered Angus Steers, K. W. Bruns, R. H. Pritchard, D. L. Boggs

South Dakota Beef Report, 2000

It is unclear how age, physiological maturity, and genetics affect intramuscular fat (IM) desposition in cattle. The study used beef cattle of known age and parentage to study the development of primal cuts, total carcass fat and IM fat depots as part of the growth process. Selecting cattle for marbling with the use of paternal grandsire's EPD for marbling was not indicative of differences in the onset or the rate, of development of marbling. Greater differences in EPD for marbling may be needed to observe phenotypic differences. Harvest group affected the level and extent of marbling (P<.10), however there was no harvest group x marbling group interactions indicating no differences occurred in the pattern of marbling development due to marbling EPD. Carcasses expressed a Small degree of marbling between the hot carcass weights of 550 and 650 Ibs. and at a back fat depth of approximately .30 in. In this study utilizing non-implanted steers of the same breed, we found that as days on feed increased, hot carcass weights, back fat depth, and percent carcass fat increased along with marbling score as well as percent 12th rib lipid content. No differences were observed in the weight of the primal cuts when expressed as a percentage of the chilled carcass between marbling groups at each of the five end points. As HCW increased across harvest groups, primal weight increased without a change in the percentage of the carcass represented by the middle meats (sirloin, shortloin, rib).

Comparison Of Estradiol-Trenbolone Acetate Implant Programs For Yearling Steers Of Two Genotypes, Robbi H. Pritchard

South Dakota Beef Report, 2000

Yearling steers (n = 400) were used to evaluate relative payout periods for implants when feeding high grain content diets. Implant treatments included (1) control (nonimplanted), (2) Synovex Plus, (3) revalor-S, and (4) Ralgrorevalor-S. The Synovex Plus (2), revalor-S (3) and Ralgro (4) were administered on day 1. The reimplant with revalor-s (4) was administered after 56 d on feed. Steers were managed in two groups. Initial BW and days fed were 782 Ib, 131 d (Group I), and 661 Ib, 145 d (Group 11). Implants increased production rates and efficiencies, increased carcass size and reduced marbling when compared to …

Field Peas In Finishing Cattle Diets And The Effect Of Processing, C. P. Birkelo, B. J. Johnson, B. D. Rops

South Dakota Beef Report, 2000

Field peas are usually grown for human consumption. However, quality problems can make them available at times for feeding to livestock. Field peas contain a moderate amount of protein (20-29%) which is highly rumen degradable. They are high in starch (41- 54%) and low in fiber (<9%) suggesting fairly high energy content. The few cattle feeding studies conducted to date have focused on their use in dairy cows and growing calves. No feeding trials have apparently been conducted with finishing cattle fed high-energy diets. The objectives of this study were 1) to evaluate yellow field peas as a replacement for soybean meal and corn grain in a high energy finishing diet and 2) to determine whether or not rolling altered their feeding value.

Leadership In Wolf, Canis Lupus, Packs, L. David Mech

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

I examine leadership in Wolf (Callis lupus) packs based on published observations and data gathered during summers from 1986 to 1998 studying a free-ranging pack of Wolves on Ellesmere Island that were habituated to my presence. The breeding male tended to initiate activities associated with foraging and travel, and the breeding female to initiate, and predominate in, pup care and protection. However, there was considerable overlap and interaction during these activities such that leadership could be considered a joint function. In packs with multiple breeders, quantitative information about leadership is needed.

"Vertebrate Pests Of Agriculture, Forestry And Public Lands" 2000 Annual Meeting

Western Region Coordinating Committee for Vertebrate Pests of Agriculture, Forestry, and Public Lands (WCC-95)

Table of Contents ........................................................... i

2000 Officers ............................................................... 1

Minutes ................................................................... 2

Number and Title of the Regional Project ................................... 2

Location and Dates of the Meeting ....................................... 2

Participants .......................................................... 2

Attendees ............................................................ 3

Adopted Agenda ...................................................... 4

Convening of Sessions (Tuesday 14 November) ............................... 4

Forum: Internet Resources in Wildlife Damage Management .................... 4

2000 Business Meeting (Wednesday 15 November) ............................ 4

Presentations (Wednesday 15 November) .................................... 9

Continued Presentations (Thursday 16 November) ........................... 10

Individual Updates ................................................... 11

Completion of Sessions ................................................ 13

Participants/ Attendees Names and Addresses . . . . . . . . . …

Effect Of Calving Time And Weaning Time On Cow And Calf Performance - A Preliminary Report, R. J. Pruitt, B. Epperson, B. Johnson, D. Zalesky, R. Haigh, D. Young

South Dakota Beef Report, 2000

Cows grazing native range year round were allotted to 3 management systems: 1.) A calving season starting in mid March with calves weaned in late October; 2) A calving season starting in mid March with calves weaned in mid September; and 3) A calving season starting early May with calves weaned in late October. After 2 years of the study, pregnancy rate and calving interval were not affected by management system. Average weaning weight was the highest for the March calving/October weaned group in both years. In the first year of the study, severe winter weather caused a lower calf …

Beef Cattle Implants, Dale R. Zobell, C. Kim Chapman, Kevin Heaton, Carl Birkelo

All Archived Publications

No abstract provided.

Dairy Digest 2000, South Dakota State University Dairy Club

Dairy Digest

No abstract provided.

Managing Forage Resources For Efficient Beef Production, W. Craig Burrell, Nola A. Taylor

All Archived Publications

No abstract provided.

Assessing Factors That May Predispose Minnesota Farms To Wolf Depredations On Cattle, L. David Mech, Elizabeth K. Harper, Thomas J. Meier, William J. Paul

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

Wolf (Canis lupus) depredations on livestock cause considerable conflict and expense in Minnesota. Furthermore, claims are made that such depredations are fostered by the type of animal husbandry practiced. Thus, we tried to detect factors that might predispose farms in Minnesota to wolf depredations. We compared results of interviews with 41 cattle farmers experiencing chronic cattle losses to wolves (chronic farms) with results from 41 nearby "matched" farms with no wolf losses to determine farm characteristics or husbandry practices that differed and that therefore might have affected wolf depredations. We also used a Geographic Information System (GIS) to …

All About Eggs, Unknown Unknown

All Archived Publications

This publication contains information about eggs including varieties and various recipes using eggs.

Cow-Calf Management Guide, Clell V. Bagley

All Archived Publications

No abstract provided.

Fish Health For Fish Farmers - 2nd Edition, Tina Thorne

Fisheries Published Reports

2nd edition.

Disease is a departure from the normal state of health of a fish or any other animal. Diseases have no doubt occurred among fishes since these animals have occupied a place on the earth. Scientific efforts to understand the causes of disease in fishes, and to attempt to control them however, have only been made during the last sixty years.

Fishes, crustaceans and molluscs, as with other animals are subject to a wide spectrum of diseases, that can be classified as infectious or non-infectious. The vast majority of disease problems in the intensive farming of aquatic animals can …

Animal Science Alumni Newsletter, Winter 2000

Department of Animal Science: Departmental News

Contents:

From the Department Head's Desk
Irv Omtvedt Retires After Many Years of Service With the University of Nebraska
New Faculty
Faculty Retirements
Graduate Program
Undergraduate Program
Judging Pavilion Fades From UNL Campus
Bud Britton Animal Science Golf Classic
Alumni Newsletter Receives Award
Earl Ellington Pleased With New College in Costa Rica
Deaths
Emeriti Update
Faculty Leave
Officers for Fall 2000
Recent Department Awards and Recognitions
Animal Science Leadership
Alumni News
Your Newsletter Committee
Call for Information for the Year 2001 Issue of the Animal Science Alumni Newsletter

2000 Nebraska Beef Cattle Report

Nebraska Beef Cattle Reports

Cow/Calf
Age of Calf at Weaning of Spring-Calving Beef Cows and the Effect on Production Economics
Supplementing Metabolizable Protein to Yearling Heifers Grazing Winter Range
Refinement of the MGA/PGF Synchronization Program for Heifers Using a 19-Day PGF Injection
Replacement Heifer Development Programs
Copper Levels and Sources in Pre- and Post-calving Diets of First-Calf Cows

Growing
Effects of Length of Grain Feeding and Backgrounding Programs on Beef Carcass Characteristics
Compensatory Growth Response and Breakeven Economics of Yearling Steers on Grass
Evaluation of the 1996 Beef Cattle NRC Model Predictions of Intake and Gain for Calves Fed Low or Medium Energy Density …