Digital Commons Network^™

Handbook Of Waterfowl Behavior: Tribe Cairinini (Perching Ducks), Paul A. Johnsgard

Handbook of Waterfowl Behavior by Paul A. Johnsgard

Delacour and Mayr (1945) placed the perching duck tribe after the pochards (Aythyini) and adjacent to the sea ducks (Mergini), but hybridization evidence (Johnsgard, 1960a) clearly indicates that the group belongs between the shelducks and the dabbling ducks and closely adjacent to the latter. There is other evidence to support this arrangement. The tracheae of shelducks, perching ducks, and dabbling ducks are all very similar, possessing bullae which in most species are osseous and rounded, and lacking enlargements of the tracheal tube. The downy young of perching ducks and dabbling ducks are very similar, and are usually patterned with dark …

Handbook Of Waterfowl Behavior: Tribe Anatini (Surface-Feeding Ducks), Paul A. Johnsgard

Handbook of Waterfowl Behavior by Paul A. Johnsgard

The tribe of surface-feeding, or dabbling, ducks is the largest single tribe in the family. There are 40 species in the tribe as it is constituted here. Contrary to the arrangement of Delacour (1956), the ringed teal is included in the Cairinini; and the crested duck, included in the Tadornini by Delacour, is here considered a typical dabbling duck. In addition, the pink-headed duck has been removed from the Anatini and placed in the Aythyini with the pochards, and the freckled duck has been removed from the tribe and is considered a primitive species having anserine relationships. The marbled teal …

Handbook Of Waterfowl Behavior: Tribe Aythyini (Pochards), Paul A. Johnsgard

Handbook of Waterfowl Behavior by Paul A. Johnsgard

The dabbling ducks grade almost imperceptibly into the pochard group considered here, and whether Marmaronetta and Rhodonessa should be included in one tribe or the other may be open to some question. As here constituted, the tribe includes 16 species of almost world-wide distribution which differ from the preceding group in several minor details. The hind toe has a larger lobe than occurs in the dabbling ducks, and it presumably aids in diving. The feet are also correspondingly larger and are set farther apart and more to the rear than in Anas. One of the most clear-cut differences is …

Handbook Of Waterfowl Behavior: Tribe Mergini (Sea Ducks), Paul A. Johnsgard

Handbook of Waterfowl Behavior by Paul A. Johnsgard

The tribe includes 20 species of which two are extinct. Except for two Southern Hemisphere species, the group is of northern and arctic distribution. All species consume a high proportion of animal material, although they are by no means all "sea" ducks. All dive extremely well, although the manner of diving varies in that some species usually open their wings when diving and others never do. All the species except the isolated Southern Hemisphere forms exhibit considerable sexual dimorphism in plumage, voice, and behavior, and there is much sympatry of ranges. Some genera (Somateria, Polysticta, Clangula, …

Handbook Of Waterfowl Behavior: Tribe Oxyurini (Stiff-Tailed Ducks), Paul A. Johnsgard

Handbook of Waterfowl Behavior by Paul A. Johnsgard

The stiff-tailed ducks constitute a unique section of the Anatidae that is possibly the most isolated of all the tribes with the exception of the Anseranatini. There are eight species which almost certainly belong in the group, plus one more that is only very tentatively included. The tribe is of worldwide occurrence. Seven of the species have long, narrow, and stiffened tail feathers that function as rudders in underwater swimming, at which all species are very adept. These species also have a dense and shiny body plumage much like that of grebes, but lack metallic coloration altogether. The typical species …

Handbook Of Waterfowl Behavior: Summary And Synopsis Of The Family Anatidae, Paul A. Johnsgard

Handbook of Waterfowl Behavior by Paul A. Johnsgard

The major sexual behavior patterns of the species of Anatidae may now be reviewed and summarized, for the purpose of clarifying evolutionary relationships in the family, tracing the evolution of behavior patterns through various taxa, and evaluating the importance of certain behavior patterns as potential isolating mechanisms.

Handbook Of Waterfowl Behavior: Works Cited, Paul A. Johnsgard

Handbook of Waterfowl Behavior by Paul A. Johnsgard

Approximately 150 works cited. (7 pages)

Handbook Of Waterfowl Behavior: Indexes, Paul A. Johnsgard

Handbook of Waterfowl Behavior by Paul A. Johnsgard

General index: The principal page reference for each species or group is indicated by boldface type. Subordinate page references for each species are listed only under the standardized English names used in this book, as shown in the Appendix. Commonly used alternate names, or names referring to certain races or species groups, are included in the index but only principal page references are listed under these names. Page references to illustrations of species or of specific displays are indicated by italics. The Appendix and Summary have not been indexed.

Scientific Names: This index provides a reference only to the page …

The Economic Potential Of The Wongan-Ballidu Shire. Part 2. Costs And Returns, G D. Oliver, A. W. Hogstrom

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

THE potential of the Wongan-Ballidu Shire to produce increased quantities of grain, wool, sheep and meat up to the year 2,000 was estimated and discussed in the first part of this article (see last issue).

In this second and final part the financial returns likely to accrue to the shire and the individual farmers as a result of these increases are discussed.

Remarkable Success Of Bovine T.B. Eradication Campaign, J Shilkin

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

Less than 20 years ago Perth dairy herds had the highest T.B. incidence of any Australian capital city and half of the Kalgoorlie cattle had the disease.

Why this was so and how the eradication campaign has reduced the incidence of less than 0.3 per cent, in 128,000 cattle is discussed in this article.

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 Control Of Weeds In Orchards, Geoffrey A. Pearce, S. E. Hardisty

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

THE use of herbicides for the control of weeds in orchards has become established during the past few years.

It has become more efficient with the introduction of newer herbicides which have proved more effective and less dangerous than some of those recommended in the past.

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.

Louisiana Agriculture Magazine, Winter 1965-1966, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.