Digital Commons Network^™

A New Marine Genus Of The Maera Group (Crustacea: Amphipoda) From Belize, James Darwin Thomas, J. L. Barnard

Marine & Environmental Sciences Faculty Articles

A new genus and species, Dumosus atari of the Maera group from coral rubble at Belize is described. It is related to Gammarella and is probably cryptic. The eyes are reduced. Dumosus differs from Gammarella in the loss of medial setation on the maxillae, reduction of article 3 on the mandibular palp, loss of article 2 on the outer ramus ofuropod 3, and in the loss of major spination on the plates of maxilla I and the maxilliped; in contrast to Gammarella, Dumosus retains the plesiomorphic uropod 3 typical of the Maera-group.

Perioculodes Cerasinus, N. Sp., The First Record Of The Genus From The Caribbean Sea (Amphipoda: Oedicerotidae), James Darwin Thomas, J. L. Barnard

Marine & Environmental Sciences Faculty Articles

Perioculodes cerasinus, a probable cryptic fossorial amphipod with embedded white orbicular ommatidia in bright ruby eyes is described from Tobago, Belize, Florida Keys, and Biscayne Bay, Florida. The eyes are separated either into two lunes or combined side to side into one large irregular brow. This is the first western Atlantic record of a generic group heretofore confined to the warm eastern Atlantic and Indian Oceans. Close affinity appears to be with the type-species of the genus, P. longimanus, from the eastern Atlantic Ocean.

Two New Species Of Two New Gammaridan Genera (Crustacea: Amphipoda) From The Florida Keys, James Darwin Thomas, J. L. Barnard

Marine & Environmental Sciences Faculty Articles

Two new species of the new genera Anamaera (A. hixom) and Spathiopus (S looensis), both belonging to the section Gammarida of Amphipoda, are described from the Florida Keys. Anamaera is a new genus close to Maera, Ceradocus, and Ceradomaera, but has an unique combination of minor character expressions. Males of Spathiopus have an unusual paddle-shaped antenna 2 but otherwise Spathiopus appears to be an apomorph of Elasmopus.

Introducing The Western Australian Department Of Agriculture, Department Of Agriculture, Western Australia

Farm Systems and Economics published reports

District offices and Research stations

Any big organisation, Government or private, needs an effective Directorate and 'back-up' staff to make full use of its potential. In the Department of Agriculture, the organisational structure has been up-dated to cope with the changing and increasing demands of the State's growing agricultural industries.

Soil Acidity In The Eastern Wheatbelt., W. Porter, S. Carr, P. Bourne

Experimental Summaries - Plant Research

Effect of profile acidity on nutrient and water use by wheat, 85M48. Effect of liming a wodjil soil prile on lupin production, 82ME10 and 82M5 . Lime banding in acid subsoils for wheat, 81M54. Liming topsoil. Rates of lime on wheat, 80M30. Residual value of lime (lupins 1985) 80M31. Survey Survey of extremely poor eastern wheatbelt yellow earth soils, 85ME92

Farm Debt In The Wheatbelt : 1984 Survey Results, Ross Kingwell

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

In recent years many farms in Western Australia's wheat-growing areas have experienced adverse seasons. For example, the 1983-84 season was characterised by a late start, dry spring and wet harvest which resulted in many farms suffering a combination of low yields and the downgrading or dockage of their grain.

Poor seasons and poor profitability prospects for wheat-growing caused some concern about farm indebtedness in these areas.

In late 1983, a Parlimentary select committee was appointed to inquire into rural hardship. The State Minister for Agriculture also announced that the Department of Agriculture would conduct a farm survey to determine the …

Interceptor Drains And Waterlogging Control, J W. Cox, T R. Negus

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

Department of Agriculture trials of seepage interceptor drains from 1972 to 1983 primarily assessed the effects of such drains on salt encroachment. Although these trials showed that the drains had little influence on salt storage within the topsoil, they did reduce waterlogging downslope.

To investigate this drainage effect further, the Department's Narrogin office surveyed 35 drains on 14 properties in the winter of 1981, followed by detailed crop measurements in December that year. Provided the drains were properly designed, surveyed and constructed, and well maintained, they could be expected to increase crop yields during a waterlogging year by about 1 …

Cryoultramicrotomy And Electron Microanalysis Of Isolated Bovine Adrenal Chromaffin Cells, Richard L. Ornberg

Scanning Electron Microscopy

Instrumentation and techniques have been developed for the cryoultramicrotomy of isolated bovine adrenal chromaffin cells frozen with a liquid helium cooled copper block method. X-ray microanalysis and electron energy loss spectroscopy were used to measure both light and heavy element content of the adrenal storage granule, the chromaffin granule. Ultrathin freeze-dried cryosections usually have a fine compression which in cellular structure compresses the cytoplasm between organelles. Nuclei, chromaffin granules, and vacuoles are relatively free of compression. The mechanism for this distortion is not known al though static charge induced sticking to the knife may be the most probable cause.

The …

The Ecology Of Foraging Behavior: Implications For Animal Learning And Memory, Alan Kamil, Herbert L. Roitblat

Avian Cognition Papers

In his recent Annual Review of Psychology article, Snowdon (1983) discussed the synthesis of ethology and comparative psychology. A similar synthesis of behavioral ecology and animal learning is beginning to take place. This article reviews developments in the behavioral ecology and ethology of foraging behavior relevant to psychological research on animal learning. The psychological literature shows that animals possess a wide range of learning abilities, including “simple” classical and operant conditioning; they acquire spatial, nonspatial, and temporal discriminations; they exhibit various forms of rule learning (e.g. matching-to-sample and learning set), and may even in certain senses learn language. Why does …

Two Modal Action Patterns With A Continuous Temporal Distribution, Alan B. Bond, George W. Barlow, William Rogers

Papers in Behavior in Biological Sciences

Most methods of quantitative analysis of animal behavior assume that action patterns can be unambiguously classified into discrete, exclusive categories. This is not invariably the case. The digging behavior of the Midas cichlid (Cichlasoma citrinellum), for example, exhibits two functionally distinct modalities, scoop and pi&, that intergrade continuously in form but are separable probabilistically. We present a technique for analyzing such behaviors that provides a reliable basis for formulating and verifying categories and allows a quantitative assessment of functional dissimilarity.

Die meisten Methoden quantitativer Verhaltensanalysen setzen eindeutige Klassifizierung der Verhaltensweisen in sich wechselseitig ausschlieißende Kategorien voraus. Die sind …

Acidification Sources In Red Alder And Douglas-Fir Soils -- Importance Of Nitrification, H. Van Miegroet, D. W. Cole

Watershed Sciences Faculty Publications

Precipitation, throughfall, forest floor, and soil leachate samples were monitored continuously in 1981 and 1982 in a N-poor Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] forest and a red alder (Alnus rubra Bong.) forest growing adjacently on a glacial soil in western Washington. The purpose of the study was to quantify the relative importance of atmospheric vs. natural sources of H+ input to forest soil acidification, and to determine the role of N transformation processes in the overall H+ balance of soils with different N status. Rainwater samples had an avg pH of 4.7 and annual H+ deposition via precipitation averaged 320 …

Rheological And Scanning Electron Microscopic Examination Of Skim Milk Gels Obtained By Fermenting With Ropy And Non-Ropy Strains Of Lactic Acid Bacteria, S. M. Schellhaass, H. A. Morris

Food Structure

Physical and rheological parameters of skim milk gels fermented with slime producing (ropy) cultures and non-ropy cultures were compared. The skim milk gels were made from steamed reconstituted nonfat dry milk inoculated with 2% of a single strain starter culture and incubated at 32, 37, and 45°C until pH 4. 5 + 0.05 was attained.

Skim milk gels fermented by slime-producing strains of Streptococcus thermophilus, Streptococcus cremoris, and Lactobacillus bulgaricus exhibited similar rheological and physical characteristics. Electron micrographs of the ropy skim milk cultures showed that slime produced by the organisms was associated with the cell surface as well as …

Publication List Economics Department: January 1980 - May 1985, Department Of Economics

Economics Pamphlet Series (1985-2016)

The publications listed herein were prepared during January 1980 - May 1985 by the faculty and graduate students in the Economics Department at South Dakota State University in the course of their research, extension, and teaching duties. The publications are arranged by the basic areas of concentration in the department: agricultural marketing, farm and ranch management, energy and water resource development, and rural development and public affairs.

Mixed Instabilities In The Gulf Stream Over The Continental Slope, Mark E. Luther, John M. Bane

Marine Science Faculty Publications

A numerical model study is presented of the unstable normal modes of oscillation of a boundary current. The model background current approximates the Gulf Stream south of Cape Hatteras, North Carolina. Both vertical and horizontal shear in current velocity and a sloping bottom topography are included. The study seeks small amplitude, alongshore propagating perturbations with real frequency and complex alongshore wavenumber. A nonzero imaginary part of the wavenumber ensures that the wave amplitude either grows or decays in the alongshore direction. The first four eigenmodes are identified and their dispersion relations are investigated. Higher order modes are not resolved by …

Recruitment Patterns In Young French Grunts, Haemulon Flavolineatum (Family Haemulidae), At St. Croix, Virgin Islands., William N. Mcfarland, E. B. Brothers, John C. Ogden, Myra J. Shulman, E. L. Bermingham, N. M. Kotachian-Prentiss

Integrative Biology Faculty and Staff Publications

No abstract provided.

Equilibrium Moisture Properties Of Corn Cobs, G. M. White, Thomas C. Bridges, Samuel G. Mcneill, Douglas G. Overhults

Biosystems and Agricultural Engineering Faculty Publications

Equilibrium moisture content-equilibrium relative humidity data for broken corn cobs have been determined for both desorption and adsorption conditions for three temperature levels and five moisture levels. The Modified Henderson and Chung equilibrium moisture equations have been fitted to these data by using non-linear regression procedures to estimate equation parameters. Both equations adequately represented the experimental data. A test of varietal differences indicated no significant difference in cob desorption ERH values for three selected corn varieties.

The Vertical Distribution And Feeding Chronology Of Larval Bear Lake Sculpin (Cottus Extensus) In Bear Lake, Utah-Idaho, D. Neverman Devroy, Wayne A. Wurtsbaugh, S. Ohlhorst

Watershed Sciences Faculty Publications

Preliminary sampling in Bear Lake, Utah/Idaho, with bottom trawls and larval fish nets indicate