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Pulicaria Hispanica (Compositae: Inuleae), A Weed New To California, Peter H. Raven

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Hawkmoth Pollination In The Genus Oenothera, David P. Gregory

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Development Of Pleurotus Ulmarius Fr. Grown In Pure Culture, Delbert Swartz, J. D. Collar

Journal of the Arkansas Academy of Science

No abstract provided.

Age And Growth Of The Rio Grande Mountain Sucker, Pantosteus Plebeius (Baird And Girard), Richard R. Raush

Biology ETDs

Seven hundred and forty-four specimens of the Rio Grande mountain sucker collected in Jemez Creek, a tributary in the Rio Grande system, were measured, sexed and aged. Both length-frequency and scale methods were used to determine the age of these specimens. The oldest males were six years of age, at which time averaged 134 mm in standard length. The oldest females were seven years of age, and average 159 mm in standard length. First spawning for both males and females occurred in the spring after they had completed three full years of life. The onset of senescence, expressed as a …

Louisiana Agriculture Magazine, Winter 1963-1964, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

A Review Of The Distribution Of Holarctic Recent Mammals, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

A review of the distribution of Holarctic Recent mammals.

The Effect Of Iron Deficiency On The Absorption And Translocation Of Iron And Phosphorus By Soybean Plants, D. P. Penner, A. J. Linck

Journal of the Minnesota Academy of Science

No abstract provided.

Murine Circadian Susceptibility-Resistance Cycle To Acetylcholine, Frank Jones, Erhard Haus, Franz Halberg

Journal of the Minnesota Academy of Science

The detection of a circadian ( about 24- hour) susceptibility-resistance cycle to acetylcholine by spot checks on mortality from this agent will be here presented. The study was done under conditions standardized to some extent for 24-hour routine-synchronized circadian system analysis ( 1). Sampling was limited to only two time points along the 24-hour scale. Hence, results represent a spot check rather than a circadian map. The conclusions to be drawn from these data have been confirmed, in the interim, with more frequent sampling. The data to be reported constitute further evidence that circadian system structure (2) involves significant and …

Development Of Circadian Sleep-Wakefulness Rhythm In A Healthy Boy Gauged By Circadian Quotients, Ellen Reeker, Michael Diffley

Journal of the Minnesota Academy of Science

The circadian quotient, briefly CQ, serves to estimate the prominence of a rhythm with a period of about 24 hours. The CQ may be computed from so-called variance spectrum analysis, among other procedures ( 1) . Computational details and some applications have been discussed earlier (1 , 2). We wish to illustrate herein the use of the CQ for gauging the development of a circadian sleep-wakefulness rhythm in the senior author's first-born child, FAR, also documented in general terms, elsewhere ( 3).

Apparent Effects Of Refrigeration On The Rate Of Embryonic Development Of Mayfly (Hexagenia Limbata) Eggs, Roger Flattum

Journal of the Minnesota Academy of Science

Hunt (19 5 3) states that temperature is an important factor influencing the rate of embryonic development of Hexagenia (mayfly) eggs. Pasvogel (1962) has reported that 46 days is the time limit Hexagenia eggs can remain dormant at temperatures slightly above freezing. It was the object of this investigation to continue this line of research and to determine the effects of temperature on the embryonic development of Hexagenia limbata eggs.

Water For Agriculture. 6. Control Of Algae In Water Supplies, R C. Gorman

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

ALGAE are primitive forms of plant life that are common and normal in surface waters. They are fonnd in every water supply exposed to sunlight.

Their presence is not normally detectable until there are enough of them to make their presence obvious.

Rabbit Fumigation, C D. Gooding

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

Not all poisons act by absorption from the alimentary tract or through the skin, the fumigants are a big group of poisons used in pest control which act on the animal after being absorbed through the lungs.

FUMIGATION as it is now used in Western Australia is not always an economical way of treating whole farm properties. It should only be used on its own in areas where it is impossible to use other more permanent methods such as warren destruction.

Deep Sowing Of Wheat : The Effect On Root Systems, S C. Chambers

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

DEEP sowing appears to be an important cause of poor emergence in wheat and care should be taken to seed at the recommended depth of 1 to 1J inches.

Nevertheless some growers in drought liable areas, persist in sowing at 2 to 3 inches in the belief that it will encourage a deep root system.

The Mango In Western Australia, K S. Cole

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

ALTHOUGH normally considered a tropical tree, the mango does well in the sub tropics of Western Australia.

The main commercial area in the State is Carnarvon but a few trees grow as far south as Perth.

Wild Oats In Wheat, J G. Paterson

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

Trials with a new chemical suggest that economical control of wild oats in wheat is only possible in heavily infested crops.

I N recent years there has been a marked increase in the incidence of wild oats in the wheat areas of this State. Three factors have been responsible.

Weeds In Lawns. 1. Identification Of Weeds In Lawns, Robert Dunlop Royce

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

ACCURATE identification of weeds is the first principal of weed control with modern chemicals.

This is as true for weeds in lawns as any other weeds.

Take-All Of Wheat On The Esperance Downs, S C. Chambers

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

THE agricultural development of the Esperance Downs was reviewed recently by Shier, Dunne and Fitzpatrick (1963) who indicated the great potential of this region.

They described the establishment of clover ley pastures capable of supporting heavy stocking rates. Crops of oats or linseed also give excellent returns.

Weed-free rotations which include linseed, oats or vetches may reduce wheat losses caused by take-all on the Esperance Downs.

Pruning Citrus Trees. 2. Pruning The Mature Tree, D B. Argyle

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

EXAMINATION of a mature tree in full production will show the natural pattern of growth already explained.

It will be seen that over the years the frame has developed by a system of layers with new growth, stimulated by sunlight, constantly appearing on the top side of the older wood.

Eventually the terminal portions of the older layers are weakened by lack of light, they become unproductive and in turn adversely affect the general fruitfulness of the rest of the tree by shading and crowding.

Selenium And Sheep Health : A Review Of White Muscle Disease Investigations In W.A, M R. Gardiner

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

SELENIUM, the latest trace element to be investigated in medicine, biology and agriculture, has been found to be essential in the prevention of a wide variety of animal diseases in various parts of the world.

Insect Pests Of Forests. 3. The Tuart Bud Weevil And The Gregarious Gall Weevil, Clee Francis Howard Jenkins

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

THE group of beetles commonly known as weevils contains some of the most troublesome of all insect pests.

The best known is probably the wheat weevil, but many other forms attack stored products and growing plants.

Comparison Of Spider Populations Of Ground Stratum In Arkansas Pasture And Adjacent Cultivated Field, W. H. Whitcomb, Harriet Exline, Maxine Hite

Journal of the Arkansas Academy of Science

Of 64 species of spiders taken from the ground stratum of an Arkansas pasture and adjoining cotton field, only 26 were common to both. Twenty-two were collected only in the cotton field; 16, only in the pasture. Many of the 18 species of lycosids were taken in greater numbers in the cultivated field, especially Pardosa milvina and Lycosa helluo. Eight species of lycosids were found only in the cotton field; two, only in the pasture. Only Schizocosa avida, of the better represented lycosids, appeared to show no preference. Similar relationships are given for dictynids, erigonids, linyphiids, oxyopids, gnaphosids, clubionids, thomisids, …

Further Studies On An Antibiotic Substance Produced By Rhizopus Nigricans Ehrenberg, Kenneth D. Mace, Delbert Swartz

Journal of the Arkansas Academy of Science

No abstract provided.

Behavioral Isolating Mechanisms In The Family Anatidae, Paul A. Johnsgard

Paul Johnsgard Collection

The ducks, geese, and swans present a host of species-recognition and isolating-mechanism problems that are equaled by few other groups of birds. As a family, the Anatidae have provided the greatest number of interspecific hybridization records of any avian family (see Gray, 1958, and Johnsgard, 1960a) both in captivity and under natural conditions. A surprising number of these hybrids have proved to be fertile, even when obtained between what appear to be well-marked genera. This remarkable capacity for hybridization indicates that isolating mechanisms must be operating effectively if species are to retain their integrity under natural conditions. Since genetic isolation …

Comparative Morphology In Nemic Phylogeny, Armand R. Maggenti

Harold W. Manter Laboratory of Parasitology: Faculty Publications

In 1945 Simpson wrote: "Phylogeny cannot be observed. It is necessarily an inference from observations that bear on it, sometimes rather distantly, and that can usually be interpreted in more than one way." Certainly this applies to a study of nemic phylogeny where our reasoning is based upon degree of resemblance and subject to confusion by convergence and reversal. Many feel that, because fossil records are lacking, it is of little purpose to indulge in speculation on nemic phylogeny. Nemic taxonomy, however, requires such speculation when it is based upon comparative morphology. Our attempts in taxonomy are really an effort …

Two New Gyrodactylus (Trematoda: Monogenea) From Cyprinid Fishes With Synopsis Of Those Found On North American Fishes, Glenn L. Hoffman, Robert E. Putz

United States Fish and Wildlife Service: Publications

Gyrodactylus atratuli from the blacknose dace (Rhinichthys atratulus) and the pearl dace (Semotilus margarita) is compared with known species of Gyrodactylus from North American fishes and described as a new species. Gyrodactylus margaritae from the pearl dace (Semotilus margarita) is compared with known species of Gyrodactylus from North American fishes and described as a new species. The average number of G. atratuli per blacknose dace in the natural habitat is 7.8 (1 to 32) and in the laboratory at the same water temperature after 55 days in captivity, 5.4 (0 to 11). G. atratuli …

Studies On Neogogatea Kentuckiensis (Cable, 1935) N. Comb. (Trematoda: Strigeoidea: Cyathocotylidae), Glenn L. Hoffman, Clarence E. Dunbar

United States Fish and Wildlife Service: Publications

The cercaria of N. kentuckiensis was found in Anaplocamus dilatatus (Nitrocris d.) and Mudalia carinata. The metacercaria was found in all fishes examined from Opequon River, West Virginia, except Cottus bairdi which was also refractory to experimental infection. Two species of Centrarchidae, four of Cyprinidae, three of Salmonidae, Etheostoma flabellare, Platypoecilus maculatus, and Trichogaster trichopterus were experimentally infected. The development of the metacercari and cyst and effect on the fish are described. The histopathology initially consists of hemorrhage and muscle necrosis about the metacercaria, followed by reorganization and formation of a loose connective tissue cyst. The controversial adult names …

Index Catalogue To Russian, Central And Eastern European, And Chinese Literature In Medical Entomology, Volume 1: Diptera, George Anastes

United States Naval Medical Research Unit 3: Publications

Over the past several years a large number of references from the USSR, Eastern Europe, and China have been collected dealing with arthropods of medical importance. These references were coded on keysort cards which made it possible to index as many as fifteen subject areas on one card. The usefulness of this indexing system was evident by the number of medical entomologists who used it in searching for references in their specialty. In response to requests from workers in the United States and other countries who did not have ready access to the index. it was decided to publish these …

A Study Of The Microflora Of Root Beer, Leah Morford Senff

University of the Pacific Theses and Dissertations

The purpose of the present work was three-fold: (1) to determine the number of microorganisms found in root beer ready for consumer used, (2) to study the effects of various temperatures and durations of incubation on this microbial population, and (3) to characterize the predominant species of contaminating bacteria.

The Scientific Interests Of Robert Wilson Gibbes As Revealed In The Gibbes-Morton Correspondence, Phillip S. Swartz

Masters Theses

No abstract provided by author.

A Seasonal Ecological Study Of Foraminifera From Timbalier Bay, Louisiana, Robert P. Waldron

Gulf and Caribbean Research

This study concerns the ecological habits of living Foraminifera from a shallow Louisiana coastal bay during a period of ten months. It is a part of an extensive study undertaken by the Coastal Studies Institute of Louisiana State University to determine the effect of chemical and physical properties of water upon marine life in a large, open bay over an extended period of time. Samples were collected monthly from established locations for the chemical, biological and foraminiferal determinations. Results of the chemical and biological studies will be published by the respective investigators in subsequent papers.

The period of time covered …