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The New Yilgarn Vermin Fence, Department Of Agriculture, Western Australia

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

THE State's vermin fence system, forming a barrier between the outer edges of the agricultural areas and the pastoral areas, has been extended 162 miles with the completion of the Yilgarn Vermin Fence this year.

Lot Feeding Of Beef Cattle. 4. Cattle For Feed Lots, W J O Wilkie

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

BREED, age, condition, health, temperament and sex are all important in feed lot cattle.

The Starling, John L. Long

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

Despite their pretty colour and their song, starlings cannot be considered beneficial, especially in the fruit and grain-growing areas of W.A. where they are declared vermin.

MILLIONS of starlings inhabit the settled parts of eastern and south-eastern Australia, but so far they have not reached Western Australia.

Eighth Random Sample Laying Test, 1964-65 : Third Progressive Report To 2nd May, 1965, Department Of Agriculture, Western Australia

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

EIGHTH RANDOM SAMPLE LAYING TEST, 1964-65

THIRD PROGRESSIVE REPORT TO 2nd MAY, 1965

Average age of birds 276 days or 39 weeks and 3 days.

Rabbit Increase : A Warning, A R. Tomlinson

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

THE increase in rabbits which has become apparent in many parts of our agricultural areas is a warning to those who considered the problem solved by myxomatosis that these pests are still present and are quite capable of building up to a major menace again, unless they are continually and effectively controlled.

Recording Figures Are No Check On Factory Returns, R A. Bettenay

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

MANY dairy farmers who use Grade Herd Recording are in the habit of comparing their Grade Herd Recording results with returns obtained from a factory.

Where the two returns show some discrepancy the inference drawn always appears to be that whichever credits the herd with the lower return is at fault—either "the recorder is not doing the job properly" or "the factory is robbing the farmer of his just returns."

Fence Out Those Rabbits, J C. Rowbotham

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

THERE is probably no more distressing sight to orchardists' eyes than two or three hundred young fruit trees that have been damaged by rabbits.

Dead Lambs : A Dead Loss, Stanley M. Dennis

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

During the past year the Animal Health Laboratory has continued its survey into the causes of abortion in sheep and perinatal lamb losses.

This article records the results of this work.

LAMBS and specimens from lambs were submitted to the Animal Health Laboratory from 229 properties situated in 121 areas in this survey during 1964.

Post-mortem examination was carried out on 1,422 lambs and specimens from 61 lambs were also examined.

Dairy Farming In The Busselton-Margaret River District. Part 4. Pasture Production, R A. Bettenay

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

If deteriorated pasture and underdeveloped pasture in the Busselton-Margaret River district could be improved to the standard of the present highly productive pastures stocking rates could be improved by more than 50 per cent.—final article in a series reporting the results of a survey of farm practices in the district.

Calfhood Diseases. 1. Gastro-Intestinal Diseases, M R. Gardiner

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

CALFHOOD disease may be divided for convenience into three main categories:

• Those affecting the gastro-intestinal tract, including diseases of an infectious nature and those arising as a result of infestation by worms (parasitism).

• Those affecting the respiratory system, including lungworms.

• Those resulting from nutritional deficiencies, especially vitamins and minerals.

Litter Size And Proportion Of Females In The Offspring Of Multiparous Rats With Varying Uterine Metabolic Levels, A. B. Schutz

Department of Animal Science: Faculty Publications

The rate of _TTC reduction by the uterine tissue of rats was determined at specific stages of the oestrous cycle, and in successive cycles at the same stage. Individual females showed a characteristic level of reaction to _TTC. Mothers whose uteri had a high reaction rate with _TTC produced litters with a higher percentage of female pups than did mothers with a low level of reaction. Previous studies have shown that _TTC reduction rate represents a metabolic activity of uterine tissue that is induced by oestrogens.

Statistics In The Design And Analysis Of Physiology Experiments, L. Dale Van Vleck, C. R. Henderson

Department of Animal Science: Faculty Publications

Statistics should be considered as a tool by the animal experimenter in much the same way that a chemical analysis or a radiation counter is used as a tool. Too often statistics is considered as something magical which can restore order out of chaos and perhaps absolve the experimenter from mistakes in logic and procedure. It is true of course that the statistician through his knowledge of statistical procedures can sometimes help salvage some results from an otherwise hopelessly muddled experiment. One point must be made clear at the outset—the statistician is not a tool of the experimenter although statistics …

Effect Of Ferrous Fumarate In The Lactation Diet On Sow Milk Iron, Pig Hemoglobin And Weight Gain, T. L. Veum, J. T. Gallo, L. Dale Van Vleck, J. K. Loosli

Department of Animal Science: Faculty Publications

Two experiments involving 22 litters were conducted to study the effects of adding ferrous fumarate to the lactation diet on iron level of sow’s milk and on weight gains and hemoglobin levels of suckling pigs. Ferrous fumarate was not effective in increasing iron content of milk, when added to the lactation diet at a level of 1984 mg. of iron per kg. The increase in hemoglobin level observed at 24 days in Experiment I and at 21 days in Experiment II, in litters nursing sows fed ferrous fumarate, was due to the pigs’ obtaining a source of iron from the …

Comparison Of Heritability Estimates From Daughter-Dam Regression And Paternal Half-Sib Correlation, L. Dale Van Vleck, G. E. Bradford

Department of Animal Science: Faculty Publications

Analysis of 60,000 pairs of daughter and dam first-lactation records expressed as deviations from herd-mate averages for five breeds yielded markedly different heritability estimates from daughter-dam regression than from paternal half-sib correlation. These results suggest that 18% of the within-herd variation is due to genetic maternal effects. The same records analyzed as mature equivalent records and not as deviations but by a sire by herd model did not show this difference. Confounding between year and sire effects probably biased the intraclass correlation estimates upward in the latter analysis, since year effects were not included in the statistical model.

Heritability Estimates When Dams And Daughters Are In The Same And Different Herds, L. Dale Van Vleck, C. L. Hart

Department of Animal Science: Faculty Publications

The regression of daughter on dam deviations of Holstein first-lactation milk production from herd-mate averages was computed for 38,440 pairs of records made in the same herd and for 10,256 pairs of records where the daughter was in one herd and the dam in another. The corresponding heritability estimates were .42 and .40, respectively, which suggest an environmental covariance of .01 between records of daughters and dams in the same herd. Other analyses were conducted for dams with two daughters with records where 1) both had records in the same herd as the dam, 2) only one had a record …

Differences Among Appraisers In The New York Type Appraisal Program, L. Dale Van Vleck, R. Albrectsen

Department of Animal Science: Faculty Publications

The purpose of the New York type appraisal program is to attempt to rate type traits objectively. Approximately 34 traits are included, of which 25 are rated by the appraiser and 9 by the herd manager. This paper reports differences among 18 appraisers, including S professional judges, 7 New York Artificial Breeders' Cooperative fieldmen, and 3 other sire selection personnel all of whom rated 38 cows in a single herd. There were statistically significant differences (P ≤ .05) among appraisers for all traits. Average scores of the professionals were different from those of the fieldmen for all except six traits. …

Dairying In Spring Point Township, Cumberland County, Illinois, Robert G. Ferren

Masters Theses

No abstract provided.

A Method Of Slide-Making For Early Nervous System Study In The Chick Embryo, Roger L. Pscherer

Masters Theses

No abstract provided.

A Modified Voges-Proskauer Method Of Determining Diacetyl In Dairy Cultures, Dwain Finkenbiner

Electronic Theses and Dissertations

Dairy scientists have known for a number of years that diacetyl is one of the principle flavor components of butter, buttermilk, and cheese cultures. Of the tests which have been introduced to determine diacetyl, one of the first was the heavy metal gravimetric method. This procedure involved distillation of the diacetyl from the mother substance. The most common derivative formed was nickel dimethylglyoximate. Principle disadvantage of this method were that large amounts of sample were required for steam distillation when the products were low in diacetyl. It was also a time consuming procedure because the steam distillation could take as …

An Occurrence Of The Sawfish, Onchopristis Dunklei In The Upper Cretaceous Of Minnesota, Gerard Ramon Case

Journal of the Minnesota Academy of Science

ABSTRACT - Rostrol teeth of the middle Crefaceous sawfish 6nthopristis dunklei were recently recovered at a location in the Mesabi Iron Range near Keewatin, Minnesota. This represents the second reported occurrence of the species in the United States.

Mastitis : Its Prevention And Control. 1. The Udder In Health And Disease, F C. Wilkinson

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

This is the first of a series of four articles on mastitis which will appear in consecutive issues of the Journal of Agriculture.

This is an introductory article describing the cow's udder in health and disease.

Fatique In Caged Layers, P Smetana

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

Pullets found immobilised on the floors of their laying cages may only be suffering from the easily-treated "cage layer fatigue" and should be checked for this before being disposed of as affected with the incurable fowl paralysis.

The Cost Of Achieving Egg Yolk Colour, P Smetana

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

The W.A. Egg Marketing Board has decided to increase its egg yolk colour bonus from Id. to 3d. a dozen from April 5, at the same time raising the qualifying colour standard.

This article presents an interesting study of the methods and costs of achieving deeper yolk colours.

Mastitis : Prevention And Control. 2. Principles Of Mastitis Control, F C. Wilkinson

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

MASTITIS is a major cause of financial loss in over half our dairy herds.

Losses result from treatment costs, milk discarded, permanent loss of milk production, culling, lowering of solids-not-fat content and loss of butter-fat production.

Mastitis CAN be controlled. This article outlines the basic principles of mastitis control in the milking shed.

Seed And Pasture Rates For New Dairy Pastures, F E. Ryan

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

THE success or failure of pasture establishment on new land often depends on the interaction of rate of seeding and rate of superphosphate application.

Every year large areas of virgin land are cleared and sown to pasture in the higher rainfall areas, and all-too often the new pasture is not as successful as it should be because too little super is applied, and, in some cases, too little seed.

Why Did These Lambs Die?, Stanley M. Dennis

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

INVESTIGATIONS over the past two years have shown that most lamb deaths in Western Australia occur during the first three days of life, that is, in the critical neonatal period.

Most of the lambs died between 24 and 72 hours after birth.

Congenital Abnormalities In Sheep, Stanley M. Dennis

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

More than 60 forms of abnormality have been found in lambs in Western Australia and in some flocks the proportion of particular abnormalities has been as high as 8 per cent, of lambs born.

In this article Dr. Dennis discusses the causes of abnormalities and reports progress of a Statewide survey of congenital abnormalities.

Predators : Lamb Killers Or Scavengers, Stanley M. Dennis, C. D. Gooding

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

PREDATORS, particularly foxes and crows, have long been considered by many farmers in Western Australia to be a serious cause of lamb losses during the first week of life.

Results of the post-mortem examination of 2,179 lambs carried out by the Animal Health Laboratory over the past two years, however, throws considerable doubt on this belief.

These examinations revealed that 34 per cent, of the lambs showed mutilation by predators but only about 2 per cent, actually died as a result of predator attacks.

The Baconer Carcass Competition : A Guide To Better Quality Pigs, P Mcnamara

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

TO PROMOTE the ever-increasing trade with Britain and encourage quality production, the Australian Meat Board sponsored the 1937 All Australian Baconer and Pork carcass competition.

Good Facilities Help T.B. Testing, Department Of Agriculture, Western Australia

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

Owner co-operation is needed for the smooth working of the tuberclin testing of cattle, compulsory in the South-West Land Division.

This article describes suitable facilities for the testing and how they operate.