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Lake Nicaragua Fishery Resources, William D. Davies

Investigations of the Ichthyofauna of Nicaraguan Lakes

Data collected during this survey indicated that the number of full-time fishermen has not increased appreciably over the past several years. However, it is likely that, if the demand for fish were to increase, a number of the present part-time fishermen would increase their effort to full-time. Indications are strong that the fish catch from this lake could at least be doubled by the existing population of fishermen, using the same gear, if market conditions were such as to encourage greater fishing effort.
The lake's overall fisheries resources are far from being exploited to their maximum, with the possible exception …

An Investigation Into The Use Of Artificial Habitats As A Means Of Increasing The Fishery Productivity Of The Great Lakes Complex Of Nicaragua, Terrance M. Lim, Kenneth R. Mckaye, Douglas J. Weiland

Investigations of the Ichthyofauna of Nicaraguan Lakes

Protein deficiency is a major dietary problem in Central America where protein-rich foods are scarce and costly. Fish, however, represents a rich source of animal protein that is not being utilized to a significant extent. Moreover, it is a source that could be made available to large portions of the populations of these countries if improvements of the present fishing and distribution methods were realized. Prerequisite to expansion, however, is a basic understanding of the ecosystems and their components. It is at this preliminary stage that the situation presently lies. Once this understanding has been achieved, means of maximizing production …

1976 Trace Element Nutrition, J W. Gartrell

Experimental Summaries - Plant Research

Contents: 1.0 Copper l,l Long Term Copper Trial, Newdegate 66Nl4 1.2 Residual copper (i) on wheat, Esperance Downs. (ii) on lucerne, Esperance Downs. (iii) on sheep and pasture, Bramley. 1.3 Copper for wheat on new land (i) sources, methods, granularity, Lake Grace. (ii) drilled vs topdressed, Newdegate. 1.4 Tissue tests for copper status of wheat. 1.5 Use of soil test for copper. 2.0. Manganese. 2.1 Residual manganese for sweet narrow leafed lupins - Badgingarra.

1976 Sunflower-Safflower Irrigated Variety Trial 1976-1977, G J. Parlevliet

Experimental Summaries - Plant Research

In 1975/76 two varieties of sunflower, Hysun 10 and Hysun 20, as well as Safflower (Gila) were grown in a large alternative crop demonstration. Results were sufficiently good to warrant more and closer examination. This led to the present variety trial using varieties suggested by Mr. M. Poole. The aim was to evaluate six sunflower varieties and one safflower. The work was carried out in the light of reduced profitability of peas, beans and some fruit crops. This results in a number of growers having irrigation water and equipment under-employed. Other farmers are after a crop which will give them …

The Mediterranean White Lupin, John Sylvester Gladstones

Journal of the Department of Agriculture, Western Australia, Series 4

"If you want to bring in a good lupin harvest, thrash your wife soundly before you go out sowing in the field". Old Syrian Proverb.

Lupin breeder Dr. John Gladstones does not beat his wife as recommended in the Syrian proverb above. Nor is he known to use ground up lupin seeds for the diverse cosmetic and medicinal purposes recommended in ancient Roman and other texts on lupins.

But his modern work on lupin breeding and development has undoubtedly been influenced by his detailed study of such writings.

In this article he discusses the history of the Mediterranean white lupin …

1976 Field Crop Experiment, M. W. Perry

Experimental Summaries - Plant Research

Performance of August sown cereals - 76MO50. To investigate the performance of late sown cereals for summer forage or grain in the eastern wheatbelt. This trial was designed to test the idea that even in a drought year, very late sowing of cereals might provide a low grain yield or at least a substantial quantity of summer feed.

Enzymes In Heloderma Horridum Venom, S. A. Murphy, Bob D. Johnson, D. H. Sifford

Journal of the Arkansas Academy of Science

A mixture of venom and saliva from the lizard Heloderma horridum was analyzed for esterase, phosphomonoesterase, phosphodiesterase, 5'nucleotidase, and protease activities. Hydrolysis of N-benzoyl-L-arginine ethyl ester occurred at a pH optimum between pH 8.6 and 9.1 with a maximum activity of 452 units per mg per min. Hydrolysis of ptoluenesulfonyl-L-arginine methyl ester occurred at a pH optimum between pH 8.1 and 8.5 with a maximum of only 36 units per mg per min. One mg of the venom mixture liberated 9.3 μM of p nitrophenol from p-nitrophenyl phosphate per minute at an optimum pH between 8.2 and 8.3. Over a …

Azide Sensitivity In Species Of Chlamydomonas And Carteria, Kim Michael Kobriger

Masters Theses

No abstract provided.

April Foods Of The Wild Turkey In Southern Illinois, David K. Fleenor

Masters Theses

A total of 95 gizzards and 106 crops were collected from 120 wild turkeys (Meleagris gallopavo silvestris Vieillot) at hunter check stations located in Alexander, Jackson, Union, and Pope Counties during April 1970, and 1972-1974 inclusive. Results are presented using total aggregate volume and per cent occurrence. The analyses indicated that during April, 96.6% of the foods eaten were of plant origin. Important plant foods in decreasing order by volume included corn, acorns, grasses and sedges, clover, miscellaneous plant materials, Jack-in-the-pulpit, hickory nuts, black gum, swamp buttercup, spring beauty, soybeans, hill blueberry, hawthorn, and ash. Animal foods were …

Louisiana Agriculture Magazine, Winter 1976-1977, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

A Study Of Milk Composition In South Dakota, Jeng-Jung Yee

Electronic Theses and Dissertations

The composition of cow's milk, including both the fat and solids-not-fat (SNF) content, is known to vary over rather broad ranges. Breed and individuality of the cow are the major factors influencing this, but many other factors are known to exert their influence. However, it has generally been observed that compensation or complementing occurs when the milk of cows is mixed together; so that the composition of milk from a herd will tend toward averages or norms. This effect usually is even more marked as the milk from two or more herds is commingled. Payment for milk on the basis …

Purine-Thiamine Anabolism During Cellular Morphogenesis In Myxococcus Xanthus, Wen-Cherng Tsai

Electronic Theses and Dissertations

Purine-thiamine anabolism during cellular morphogenesis in Myxococcus xanthus was investigated. One of the approaches was to test vegetative and myxospore (2.5 h and 8 h) extracts of M. xanthus CW-2 for their ability to synthesize the second de novo intermediate, 5'-phosphoribosylglycinamide, from beginning precursors either by way of phosphoribosyl-pyrophosphate amidotransferase (EC 2.4.2.14) or ribose-5-phosphate aminotransferase. Results indicate the presence of both the amido- and aminotransferases in both types of extracts, and both enzymes appear to be present at about the same level (per milligram of protein) in vegetative cells, myxospores (2.5 h and 8 h), and in a bacterial prototype, …

Growth, Reproduction And Blood Characteristics Of Hereford Females, Harold R. King

Electronic Theses and Dissertations

The objective of this experiment was to measure the effects of level of wintering nutrition and pasture treatment upon growth and reproduction of Hereford heifers from weaning to 4 1/2 years of age. Levels of certain blood constituents were determined at periodic intervals throughout the study as additional indicators of adequacy in intake for some major nutrients and for measures of general health of the animals. Data pertaining to weight and feed are reported in the English system, even though the metric system was used in the Review of Literature section. This was considered desirable in view of present common …

Intake And Digestibility Of Brown-Midrib Corn Silage By Lactating Dairy Cows, James Allen Rook

Electronic Theses and Dissertations

Two short-term trials evaluated brown-midrib-3 (bm₃) mutant (low lignin) corn silage for early lactation Holstein cows. In trial 1, five cows per group were individually fed a ration of silage and grain (60:40 ratio, dry matter basis) from week 2 through 8 of lactation. Lignin percentages for bm₃ and normal silages were 4.9 and 6.4. Cattle fed the bm₃ ration consumed 19% more total dry matter as percent of body weight than cows fed normal. Digestibilities of dry matter, cell-wall contents, acid detergent fiber, and energy were 3 to percentage units higher for the bm_{3 …}

Heterospermic Insemination In Swine, Donald G. Levis

Electronic Theses and Dissertations

The studies report herein were conducted to evaluate (1) if there is a difference in pregnancy rate and litter size in swine between heterospermic and homospermic inseminations, (2) the effect of mixing various fresh cm n components involving spermatozoa in the sperm-rich fraction, seminal plasma from the centrifuged post-sperm fraction and Beltsville Ll extender on oxygen consumption, pH, motility and percent dead spermatozoa and (3) the effect of storage (54 hours) on oxygen consumption, pH, motility and percent dead spermatozoa in the various combinations. One Hampshire and one Yorkshire boar were used in the pregnancy rate and litter size study.

580 Extension Plan: 5 Year Plan For Extension & Research By 1980 For Southeast Nebraska, Loyd L. Young, Elizabeth A. Birnstihl

Southeast Research and Extension Center: Reports and Administration

The purpose of this document is to present a series of guide-lines to assist the Extension District V (Southeast Extension District) administrators and staff, the Nebraska Cooperative Extension Service, the Nebraska Agricultural Experiment Station, the Institute of Agriculture and Natural Resources and other University administration in moving the District to a high level of 0fficiency in meeting the needs of the people of the District in those areas in which the Extension Service has the legal obligation to serve.

Planning is a continuous process and these planning suggestions are not ends, but steps that can be used in decision making …

Some Effects Of Solid Rocket Motor Fuel Exhausts On Avian Embryos, Lindsey Elliott Deguehery

Retrospective Theses and Dissertations

Fertile White Leghorn (Gallus gallus) and Bobwhite Quail (Colinus virginianus) were subjected to 15 min exposures produced by burning solid rocket motor (SRM) fuel. Comparative mortality data were collected. Chicken eggs were further used to study the effects of exposure on water relations and blood gas parameters. Chicken embryos exposed once on day 19 or incubation demonstrated and LD50 of 204 ppm; the LD50 for quail embryos was 175 ppm. When mortality was regressed on the final exposure concentration, chicken and quail embryos exposed on days 12 and 19 showed LD50's of 127 and 86 ppm respectively, and embryos exposed …

Influence Of Dietary Fats And Carbohydrates On Lipid Metabolism In Male And Female Rats, Marjorie Ellen Fitch

Journal of the Arkansas Academy of Science

Effects of dietary fats and carbohydrates on lipid metabolism in rats were studied. Male and female 4-week-old rats were divided into 8 groups and fed 4 fat-carbohydrate combinations (beef tallow or safflower oil, each with either sucrose or rice starch). After 4 weeks, animals were killed by exsanguination through the abdominal aorta and livers were removed. Plasma and liver cholesterol and phospholipids were determined qualitatively and quantitatively. Liver moisture, protein, and lipid and the fatty acid composition of the total liver lipid were determined quantitatively. Variations in growth, food efficiency, and lipid metabolism, particularly as manifested by the fatty acid …

A Comparison Of Hay Conservation Systems, E E. Rowley

Journal of the Department of Agriculture, Western Australia, Series 4

The high cost an dshortage of farm labour in the Esperance District is posing serious problems for farmers using traditional hay conservation systems. Author Ted Rowley, then an advisor with the Esperance District office of the Department of Agriculture surveyed a number of farms to study the economics of varoius alternatives. This article is a summary of his report presented to a 1976 Fodder Conservation Workshop.

Low Protein Rations Halve Bacon Pig Profits, N W. Godfrey

Journal of the Department of Agriculture, Western Australia, Series 4

For many years the department of agriculture has recommended that pig producers include meat meal or other protein concentrate in pig rations based on cereal grains. However, it is still common for pigs to be raised on cereal grains with little or no protein added.

Recent trials at the Department of Agriculture's Medina Pig Research Station have demonstrated the losses which can result from feeding pigs on low-protein cereal rations.

Bulletin 3955 - The Sheep Skin Industry In W.A., H. E. Fels

Bulletins - 3000 - 3999

The sheep skin industry is larger than most people realise. Its importance is shown by F.O.B. values of sheep skin exports from Australia in 1972/73, compared with sheep meats, wheat and iron ore,

F.O.B, values of exports - Australia, 1972/73

Sheep skins, with and without wool on $110 million

Mutton and lamb Exports $119 million

Wheat $274 million

Iron ore and concentrates $439 million

Bobwhite Quail Food Habits In The Southeastern United States With A Seed Key To Important Foods, J. Larry Landers, A. Sydney Johnson

Galliformes Specialist Group and Affiliated Societies: Reports and Other Materials

A search of the literature revealed 27 studies of food habits of bobwhite quail in the southeastern United States. These include data from nearly 20 ,000 birds. In this publication all seed foods reported in these studies are listed and evaluated, and a key to important species is included. Over 650 seed foods are listed, and volume and frequency classes are given for each seed food as reported in each study. Only 78 foods comprised 1 percent or more of the food volume in one or more studies. The 45 most important foods are ranked for each physiographic province. The …

Ethnically Important Woody Plants Of East-Central Illinois, David Eric Brussell

Masters Theses

No abstract provided.

Growth Of The Shrimp, Penaeus Aztecus, Fed A Diet Of Live Mysids (Crustacea: Mysidacea), John Ogle, Wayne Price

Gulf and Caribbean Research

Commercial brown shrimp (Penaeus aztecus) were shown to consume large numbers of mysid shrimp (Mysidopsis almyra) under laboratory conditions. Growth of shrimp fed a diet of mysids was comparable to growth of shrimp fed a diet of Artemia nauplii. It is suggested that mysid shrimp may serve as a food source for juvenile penaeid shrimp in northwestern Gulf coast estuaries.

The Functional Development Of The Adrenal-Sympathetic Nervous System In Neonatal And Adolescent Swine, Sidney Koon Hung Woo

University of the Pacific Theses and Dissertations

The development of the animal after birth is marked by complex changes. Certain periods are particularly important and have been defined as "critical periods" (Krecek, 1971). Two processes are important to the survival of the animals during these times. The process of "adaptation" involves the maturation of specific physiological systems according to the needs of the neonatal animal, and is dictated by the external environment. The process of "tolerance" renders the neonate relatively unresponsive to a stressor as compared to the adult and protects the animals from over-responding the depleting vital resources until it is physiologically mature. An example of …

Agricultural Experiment Station News December 1975

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE ACTING DIRECTOR'S DESK
PERSONNEL ACTIONS
GRANTS AND CONTRACTS
GENERAL NOTES
AGRICULTURAL EXPERIMENT STATION PUBLICATIONS – NOVEMBER 1975

89th Annual Report Of The Nebraska Agricultural Experiment Station

Agricultural Research Division: News and Annual Reports

Contents:
Foreword
Administration and Staff
Nebraska Agricultural Experiment Station
Research Projects
Experiment Station Publications
Publications of the Staff
Report of Income and Expenditures

Separation Of Spores And Parasporal Crystals Of Bacillus Thuringiensis In Gradients Of Certain X-Ray Contrasting Agentsseparation Of Spores And Parasporal Crystals Of Bacillus Thuringiensis In Gradients Of Certain X-Ray Contrasting Agents, Eugene S. Sharpe, Kenneth W. Nickerson, Lee A. Bulla Jr., John N. Aronson

Papers in Microbiology

Spores and parasporal crystals of Bacillus thuringiensis can be separated at moderate centrifugation speeds (10,000 to 12,000 rpm) in gradients of Renografin or sodium diatrizoate.

Membrane Associated Glucose And Gluconate Oxidase Enzymes In Pseudomonas Fluorescens: Characterization And Regulation, Scott D. Feighner

Masters Theses

No abstract provided.

Reevaluation Of Common Wheats From The Usda World Wheat Collection For Protein And Lysine Content, K. P. Vogel, V. A. Johnson, P. J. Mattern

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The protein and lysine content of wheat can be altered by breeding only if genetic variability exists for these traits. Lysine is a nutritionally limiting amino acid in wheat protein. Protein and lysine analyses of the common wheats of the USDA World Wheat Collection indicated that variability does exist for these traits. Some of the variability for protein and lysine among wheats of the World Collection may not be genetic in origin, because all the 12,000 wheats analyzed were not grown in the same environment. The purpose of this study was to reevaluate selected lines from the World Wheat Collection …