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Articles 3391 - 3420 of 3529

Full-Text Articles in Physical Sciences and Mathematics

Influence Of Vegetation On The Distribution Of Small Mammals On A Waterfowl Production Area, Douglas A. Searls Jan 1974

Influence Of Vegetation On The Distribution Of Small Mammals On A Waterfowl Production Area, Douglas A. Searls

Electronic Theses and Dissertations

. A study was conducted on a Waterfowl Production Area in Brookings County, South Dakota in 1972-73 to determine the distribution and abundance of small mammals. Three cover types, reseeded native grassed, brome-alfalfa, and bluegrass, were studied. Meadow voles (Microtus pennsylvanious), and deer mice (Peronyscus maniculatus) were captured most frequently. Jumping ice (Zapus hudsonius), masked shrews (Sorex cinerius), short tailed shrews (Blarins brevicauda), grasshopper mice (Omychomys leucogaster) and house mice (Mis musculus) were also taken. The bluegrass association had the highest number of small mammal captures and the reseeded native grass association has the least. There was no significant difference …

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A Study Of Oxomolybdenum Chelate Compounds Of Oxidation States (V) And (Iv) When Prepared By Photochemical Reduction Of Oxomolybdenum (Vi) Complexes In Ethanol Under Inert Atmosphere And By Chemical Reduction, Richard Donald Dendinger Jan 1974

A Study Of Oxomolybdenum Chelate Compounds Of Oxidation States (V) And (Iv) When Prepared By Photochemical Reduction Of Oxomolybdenum (Vi) Complexes In Ethanol Under Inert Atmosphere And By Chemical Reduction, Richard Donald Dendinger

Electronic Theses and Dissertations

A photolysis system was designed for meticulous exclusion of oxygen and moisture. Photolyzed ethanol solutions of dioxobis(acetylacetonato)­-molybdenum(VI), Mo02 (acac)2, were studied via preparation of derivatives with several uninegative bidentate ligands (chelH, cysteine was designated cystH2) and pyridine (py). Infrared spectroscopy was a useful tool in identifying these compounds. An oxomolybdenum(IV) compound, MoO(dtc)2 was isolated from the red photolyzed solution when dtc was the N,N-diethyldithiocarbamate ion. Tropolone, 8-hydroxyquinoline, N,N-diethyldithiocarbamate, and cysteine formed products formulated as the dioxo bridged molybdenum(V) compounds, Mo204(che1)2. Acetylacetone, tropolone, 8-Hydroxyquinoline and N,N-diethyldithiocarbamate, formed derivatives formulated …

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Evaluation Of Duck Production On Waterfowl Production Areas In Northeast North Dakota, Gerald L. Heismeyer Jan 1974

Evaluation Of Duck Production On Waterfowl Production Areas In Northeast North Dakota, Gerald L. Heismeyer

Electronic Theses and Dissertations

An investigation of duck production on six Waterfowl Production Areas (WPA’s) in northeastern North Dakota was conducted during 1970-73. This investigation was conducted in conjunction with habitat-manipulation study by the Northern Prairie Wildlife Research Center that entailed prescribed burning of three WPA’s. Wetland habitat conditions, breeding populations and nesting were evaluated all four years. Brood observations were made during the last three years and nesting cover was evaluated during the last two years of investigation. Wetland habitat conditions were generally favorable during the first three years of investigation but in 1973 wetland conditions were extremely poor due to low precipitation …

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Seasonal Movements And Habitat Selection Of Pheasant Cocks In South Dakota, Robert A. Fedeler Jan 1973

Seasonal Movements And Habitat Selection Of Pheasant Cocks In South Dakota, Robert A. Fedeler

Electronic Theses and Dissertations

Data were gathered on seasonal movements and habitat selection of 30 pheasant (Phasianus colchicus) cocks that were radio-equipped in eastern South Dakota from 1970 to 1972. Pheasant cocks stayed in an area of less than 100 acres from spring through hunting season. In winter, cocks used even smaller areas more intensively. Cocks moved about their home range by shifting their activity center rather than by adjustment in range of daily travel. Adult cocks seemed to have strong site attachments on a year-round basis. Immature cocks were more mobile, especially during the fall prior to hunting season. In spring, adult cocks …

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Evaluation Of Cattle Use Of A Deer Winter Range In The Black Hills, David C. Hamm Jan 1973

Evaluation Of Cattle Use Of A Deer Winter Range In The Black Hills, David C. Hamm

Electronic Theses and Dissertations

Cattle use of a deer winter range in the Black Hills was investigated during the summer grazing seasons of 1971-1972. A U.S. Forest Service grazing allotment situated between Mystic and Redfern, South Dakota, was used as the study area. The allotment was divided into five grazing units or pastures managed collectively under a “rest-rotation” system of grazing. Three study sites were selected in each unit of the allotment, and 75 exclosures were erected on each site; a paired-plot method was used to collect data. Indices to use of sites by deer and cattle were obtained by counts of deer pellet …

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A Study Of Bisimines Of Tetramethyl-1,3-Cyclobutanedione, Edward Albert Schmidt Jan 1973

A Study Of Bisimines Of Tetramethyl-1,3-Cyclobutanedione, Edward Albert Schmidt

Electronic Theses and Dissertations

It was the purpose, therefore, of this work, to investigate the preparation, properties, and reactions of bisimines of 2,2,4,4- tetramethyl-1,3-cyclobutanedione, to determine the chemical effects of carbon π-bonded to nitrogen. Certain of these effects are compared to carbon π-bonded to oxygen in a structurally similar environment.

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Evaluation Of Giant Canada Goose Restoration In Western South Dakota, Dennis L. Lengkeek Jan 1973

Evaluation Of Giant Canada Goose Restoration In Western South Dakota, Dennis L. Lengkeek

Electronic Theses and Dissertations

A study of giant Canada goose (Branta Canadensis maxima) restoration in western South Dakota was conducted during 1970 and 1971. Nesting, production and mortality, homing, and pioneering were evaluated both years. Nesting began April 4 in 1970 and extended for 73 days, but the peak of nesting occurred from April 29 to May 5. In 1971, nesting began April 1 and continued for 69 days, with the peak occurring April 8-14. The peak of hatching occurred June 6-12 in 1970 and May 8-14 during 1971. Small stockponds were utilized for nesting both years. Islands were preferred nesting sites. Peninsulas and …

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Applications Of New Methods Of Structure Determination, Richard Earl Wagner Jan 1973

Applications Of New Methods Of Structure Determination, Richard Earl Wagner

Electronic Theses and Dissertations

The structures of: 1) 2-piperidino-5-chlorornethyl-5-rnethyl-2- oxo-1, 3,2-dioxaphosphorinan; 2) 2-phenoxy-5-chloromethyl-5-methyl-2- oxo-1, 3,2-dioxaphosphorinan; 3) 2-p-bromophenoxy-5-chloromethyl-5- chloromethyl-5-methyl-2-oxo-1, 3, 2-dioxaphosphorinan have been resolved by x-ray single crystal studies. A Picker 4 circle diffractometer employing molybdenum x-rays and a zirconium filter was used to obtain accurate data. The space group of the first two compounds is P21/c while that of the third is Pca21. The lattice constants of the compounds are: 1) a = 10.035(8)Å, b = 6.503(4), c = 20.19(1), β = 96.8(3)°; 2) a = 6.237(3)Å, b = 11.437(5), c = 19.419(9), β = 109.95(3); and 3) a = …

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Chemical Survey Of Selected South Dakota Lake Sediments, Alan Ross Swanson Jan 1973

Chemical Survey Of Selected South Dakota Lake Sediments, Alan Ross Swanson

Electronic Theses and Dissertations

Available phosphorus, organic carbon, and organic nitrogen were measured in bottom sediments of 16 lakes and ponds in northeast South Dakota. These lakes were glaciated, relatively shallow, and productive. Ranges of the surface sediments were: available phosphorus, 2 to 42 ppm; organic carbon, 0.94 to 5.34 percent; and organic nitrogen, 0.29 to 0.79 percent. Ranges of subsurface sediments were: available phosphorus, 2 to 39 ppm; organic carbon, 0.54 to 6.06 percent; organic nitrogen, 0.19 to 0.88 percent. Concentrations in most lakes varied little from top to bottom. Hard-bottomed lakes generally decreased in nutrient concentrations from sediment surface of subsurface. Lower …

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Origin And Transport Of Nutrients In The Upper Big Sioux River, South Dakota, Charles William Thompson Jan 1973

Origin And Transport Of Nutrients In The Upper Big Sioux River, South Dakota, Charles William Thompson

Electronic Theses and Dissertations

The upper Big Sioux River Basin, in northeastern South Dakota, was studied to determine the origin and transport of nutrients in the Big Sioux River. The area was divided into three segments. Two of the segments, the Big Sioux River and Willow Creek Basins, were primarily agricultural drainage areas, and one segment was the city of Watertown. Sampling stations were selected to facilitate the determination of nutrient inputs to the river from each of these segments and to determine the nutrient load in the river leaving the study area. Nutrients studied included total orthophosphate and the particulate and dissolved fractions …

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Nutrient Sources And Transport In The Central Region Of The Big Sioux River, South Dakota, Marvin E. Hora Jan 1973

Nutrient Sources And Transport In The Central Region Of The Big Sioux River, South Dakota, Marvin E. Hora

Electronic Theses and Dissertations

Concentration and flow of total phosphate (TP), total organic nitrogen (TON), and total organic carbon (TOC) were measured from November 9, 1971 to November 8, 1972 on the Big Sioux River, Six Mile-North Deer Creek, and Drainage M. The Big Sioux River transported 418,640 x 10 3 m3 of water, 776,880 kg TP, 599,590 kg TON, and 5,419,580 kg TOC during the study-year. Six Mile Creek transported 23,900 x 10 3 m 3 of water, 52,040 kg TP, 43,580 kg TON, and 327,860 kg of TOC. The transport of water and nutrients in Six Mile Creek per square kilometer of …

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The Primary Structure Of Nifungin, Marvin Lee Withrow Jan 1973

The Primary Structure Of Nifungin, Marvin Lee Withrow

Electronic Theses and Dissertations

The primary structure of the antifungal peptide nifungin was studied. Amino acid analysis of nifungin before and after performic acid oxidation revealed 51 amino acids and the presence of an unidentified ninhydrin positive material. The unidentified material constituted approximately ten per cent of nifungin by weight. It contains nitrogen but, as reported by others (2), did not contain phosphate or reducing sugars. It was not hydrolyzed into smaller compounds by strong mineral acids. Carboxyl terminal analysis was conducted utilizing carboxy-peptidase A and B on both the oxidized and unoxidized nifungin. Tyrosine appeared to be released most rapidly followed by lysine, …

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Use Of Waterfowl Production Areas By Ducks And Coots In Eastern South Dakota, Spencer Vaa Jan 1972

Use Of Waterfowl Production Areas By Ducks And Coots In Eastern South Dakota, Spencer Vaa

Electronic Theses and Dissertations

The use of Waterfowl Production Areas (WPA) by American coots (Fulica americana) and ducks was studied during 1970 and 1971 in east-central South Dakota The Eriksrud WPA, a type IV wetland with 55 acres of water area and 35 acres of upland, contained 188 coot nests during the 2-year study. Of the 188 coot nests, 178 hatched for a success rate of 95 percent. Average clutch size of 130 completed clutches was 8.4. Average size of 21 coot broods from 4 to 6 weeks of age was 6.1. Coot production on the Eriksrud area was estimated at 543 young per …

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Development Of Techniques For Distribution Of Baits To Raccoon For Chemosterilant Studies, Richard L. Nelson Jan 1972

Development Of Techniques For Distribution Of Baits To Raccoon For Chemosterilant Studies, Richard L. Nelson

Electronic Theses and Dissertations

Sudan Red IV, Sudan Black B, and demethylchlortetracycline (DMCT) were tested as physiological markers in baits for raccoon (Procyon lotor). DMCT was readily detected in the jawbone of raccoons given 50 mg when examined under an ultraviolet light at period of 7, 30, 75, and 450 days following treatment. Seven days after administering 75 mg of Sudan Red IV, it could not be detected in fat deposits. Sudan Black B, administered in similar dosage, could not be detected at 30 days. A total of 1826 chicken eggs containing 50 mg DMCT was distributed on a 25 square-mile study area between …

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Food Selectivity Of The Black Bullhead (Ictalurus Melas, Rafinesque) In Lake Poinsett, South Dakota, Andrew J. Repsys Jan 1972

Food Selectivity Of The Black Bullhead (Ictalurus Melas, Rafinesque) In Lake Poinsett, South Dakota, Andrew J. Repsys

Electronic Theses and Dissertations

The food habits of young-of-the-year, subadult and adult black bullheads were studied in Lake Poinsett, South Dakota, from March, 1970, to April, 1971. Two hundred twenty young-of-the-year (37-87 mm total length) fed primarily on limnetic cladocerans and copepods. Leptodora and Diaphanosoma comprised 86.5% of the total food volume. Chironomid larvae and pupae made up 5.6% of the total. Other benthic organisms and littoral cladocerans together contributed less than 1%. Stomach contents of 608 subadult and adult black bullhead (143-304 mm total length) indicated significant seasonal vairaiton in diet. Daphnia pulex and chronomid larvae were important food items in winter. Bullheads …

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Influence Of Weather On Movement And Habitat Use Of Hen Pheasants During Brood Rearing, James M. Ruth Jan 1972

Influence Of Weather On Movement And Habitat Use Of Hen Pheasants During Brood Rearing, James M. Ruth

Electronic Theses and Dissertations

Pheasants survive in a wide range of yearly weather extremes but can be limited by certain short-term weather factors (Graham and Hosterburg 1948). Study of short-term weather conditions can therefore be important in understanding pheasant survival. Many studies have been done on yearly and seasonal effects of weather on pheasant production and survival. Bemitt and Terril (1940) reported on possible temperature factors in pheasant management in the north central area of the United States. Effects of weather on pheasant reproduction were studied by Buss and Swanson (1950) and Kozieky et al. (1955). MacKullan and Eherhardt (1953) studied the tolerance of …

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Food Habits Of Fish In A Multispecies Farm Pond, Thomas W. Gengerke Jan 1972

Food Habits Of Fish In A Multispecies Farm Pond, Thomas W. Gengerke

Electronic Theses and Dissertations

Food habits of yellow perch, bluegill, and black crappie were studied during 1970 and 1971 in Abbey Pond, South Dakota. Aquatic insects, zooplankton, mollusks, and fish were the most frequently consumed food items by the three species. Yellow perch led primarily on aquatic insects, zooplankton, and mollusks. Aquatic insects were dominant (by volume) in 40.0 and 61.5 percent of the samples respectively for the two years. Zooplankton, mollusks, aquatic insects, and bryozoans were the dominant food items by volume of adult bluegills. On an annual basis aquatic insects were the most important food item in the diet. Adult black crappies …

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Waterfowl Production In The James River Valley Of South Dakota, William E. Wheeler Jan 1972

Waterfowl Production In The James River Valley Of South Dakota, William E. Wheeler

Electronic Theses and Dissertations

A study of waterfowl production was conducted on two study areas in the James River Valley of South Dakota in 1971 and 1972. Its objectives were to measure rates of reproductive success and to determine the effect of land use and other influences on duck production. The five most abundant species of nesting ducks were blue-winged teal (Anas discors), mallard (platyrhvnchos), gadwall (A. strepera), shoveler (clypeata), and pintail (acuta). Seventy-two percent of the wetland habitat on the study areas consisted of temporary (Type l and Type 3) water areas. Only 3.9 percent of the wetlands represented semi-permanent (Type 4) and …

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Effects Of Polychlorinated Biphhenyls In The Ring-Necked Pheasant, Robert Bernard Dahlgren Jan 1972

Effects Of Polychlorinated Biphhenyls In The Ring-Necked Pheasant, Robert Bernard Dahlgren

Electronic Theses and Dissertations

In 1970 and 1971, cock pheasants (Phasianus colchicus) were given single capsules weekly containing 0 and 25 mg polychlorinated biphenyls (PCB), Aroclor 1254, and hens were given O, 12.5, and 50 mg. Egg production was reduced (P<0.01) in the hens given 50 mg PCB both years. Fertility, determined by visual inspection of incubated eggs, was unaffected by PCB. Hatchability was lowest in the group of hens given 50 mg in both years but significantly lower (P<0.01) only in 1971. PCB adversely affected the viability of the embryo both years, as the number of eggs pipped but not hatched in PCB groups was higher (P<0.05). PCB did not affect eggshell thickness. Behavior on the visual cliff shortly after hatching was affected among offspring of hens given 50 mg PCB in 1970 (P,0.01). Offspring of hens given 50 mg chose the visually-deep side of the cliff. No differences in behavior on the visual cliff were evident in 1971. Response to hand catching of offspring was affected in 1970 (P <0.01). The ability of penned pheasants to avoid hand capture was least where both parents received PCB, followed by those where hens only, cocks only and neither parent received PCB. No differences in response to hand capture among groups were found in 1971. Weights of chicks from hens on 50 mg were lower (P<0.01) at 6 weeks of age in 1970. This effect was not seen in 1971. Survival of chicks in brooders to 6 weeks of age was lower (P<0.01) in offspring of hens given 50 mg PCB weekly in 1970. No differences were found among offspring of treatment groups in 1971. Survival from 6 weeks of age to fall was similar in all groups. Overall survival from hatching to fall was less (P<.0.05) in offspring of hens given 50 mg weekly in both years combined. No differential effect was found between sexes for survival. PCB in doses varying front 10 mg to 210 mg daily caused hyper-excitability, weakness, tremoring, lack of appetite, lack of feathers, and a comatose death. Birds 11-weeks old given 10 or 20 mg PCB daily, birds 6 to 9 months old given 50 or 100 mg each 3.5 days, and adult hens given up to 50 mg once a week continued to eat. Eleven-week old birds given 210 mg daily stopped eating or those given 210 mg daily, the heaviest birds lost the greatest percentage of their weight (15 to 31 percent) before death occurred (1.3 to 4.3 days). Birds intentionally starved at the same time lost a greater percentage of weight (27 to 51 percent) before death (2.3 to 8.6 days). Some adult hens were given a single 50-mg capsule and samples of whole body, brain, liver, muscle, eggs, and feces were analyzed to determine patterns of storage and excretion. Levels of PCB were highest at 12 hours after capsule administration. Residues were highest in liver, followed by brain and muscle over 28 days following the single 50-mg capsule. From 94 to 98 percent of the administered dose was absorbed and 40.5 mg of the 50mg were in the body after 28 days. Hens were in a state of low egg production and excreted 4.2 mg in the eggs and 4.0 mg in the feces over 28 days. Excretion in the egg could be an important means of ridding the body of PCB. Four hens from the 1970 breeding experiment, given 17 capsules weekly containing 12.5 mg PCB and killed 1 week following the last capsule, had from 37 to 56 percent of the administered dose in their bodies. Four hens on the 50-mg level in 1970 had from 60 to 82 percent of the dose given. Five hens given 12.5 mg weekly for 16 weeks in 1971 had an average of 23.8 ppm PCB in their bodies 1 week after the last capsule, three hens had an average of 13.6 ppm after 3months on a clean diet, and three others had an average of 20.9 ppm after 6 months. Excretion was variable and slow. An analysis of brain, liver, and muscle tissues from dead and surviving birds fed PCB at various levels showed that brain residue levels from 300 to 400 ppm wet weight were indicative of death from FCB toxicosis. Liver and muscle levels were too variable to be useful in assessing cause of death. Administration of PCB decreased weights of heart and spleen (P <0. 01) at all levels given and increased weights of kidneys and livers in birds given 10- and 20-rng doses daily (P <0. 01) but not in birds given 210 mg daily. Splenic atrophy, where spleens were small, pale-tan color, and had wrinkled capsules resulting from depletion of lymphatic nodules, was characteristic of birds given PCB. PCB and dieldrin were given singly and jointly, and only additive, not synergistic, effects were noted. Livers of wild pheasants from Pennsylvania, Indiana, and South Dakota had no more than 2 ppm PCB. This indicates low-level contamination.

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Pheasant Production Using Wild Cocks And Penned Game-Farm Hens, Michael R. Grode Jan 1972

Pheasant Production Using Wild Cocks And Penned Game-Farm Hens, Michael R. Grode

Electronic Theses and Dissertations

Pheasant production using free-flying wild cooks and penned game-farm hens was evaluated during 1971. Hens were placed in 0.5-acre pens to compare production at density levels of 10, 20, and 40 hens per acre. Wild cooks entered the 0.5-acre pens the day following introduction of the game-farm hens. The greatest numbers of cooks were observed in the pens with the highest density of hens. Censusing in mid-March indicated a population of 12 to 15 wild cooks in the vicinity of the study pens. A known mortality of 31 hens occurred and percentage mortality was similar at each density level. Pulling …

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Use Of Eelctrophoresis To Determine Populations Of Pheasants In South Dakota, David George Montag Jan 1972

Use Of Eelctrophoresis To Determine Populations Of Pheasants In South Dakota, David George Montag

Electronic Theses and Dissertations

The ring-necked pheasant (Phasianus colchicus) is an important game bird, and various management techniques have been implemented in its behalf. One of the most common practices has been transplanting or stocking wherein pheasants are introduced into an area with a depleted population in hopes of increasing pheasant production. The effects of such programs are difficult to evaluate since there is no way of knowing if the introduced birds are in any way responsible for production changes which subsequently occur. If the taxonomic characteristics of the native and the introduced populations could be determined, the effect that introduced birds have on …

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Effects Of Diethylstilbestrol On Reproduction In The Black-Tailed Prairie Dog, Donald G. Pfeiffer Jan 1972

Effects Of Diethylstilbestrol On Reproduction In The Black-Tailed Prairie Dog, Donald G. Pfeiffer

Electronic Theses and Dissertations

Research was conducted in southwestern South Dakota in 1970 and 1971 to obtain information on the reproductive cycle of the black-tailed prairie dog (Cynomys ludovicianus) and to test effectiveness of diethylstilbestrol as a reproductive inhibitor. Embryo body lengths from 10 pregnant females were compared to body lengths of 14 known day-old young to learn the peak breeding period when an estrogenic chemosterilant would be most effective. Conception dates were obtained for three females by backdating the gestation period. The breeding peak was found to occur in late February and early March in South Dakota. Nine of 11 Prairie dogs were …

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Seasonal Movements And Behavior Of Ring-Necked Pheasants In Eastern South Dakota, Arthur V. Carter Jan 1971

Seasonal Movements And Behavior Of Ring-Necked Pheasants In Eastern South Dakota, Arthur V. Carter

Electronic Theses and Dissertations

Information was gathered on mobility, behavior, and related activities of pheasants from July 1966 to July 1968 by banding and/or marking 160 birds with backtags and radio transmitters. Food was readily available since the winters were mild with little snow. Birds moved less than 1/4 mile from roosting areas to cornfields and weed patches to feed. Numbers of birds dispersing from the study area in spring varied each of the years, but 60 to 70 remained there during the two reproductive seasons. Adult cocks traveled less than 1/4 mile when dispersing-and adult hens moved less than 1/2 mile. Movements by …

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Effects Of Chick Stimuli And Dieldrin On Adoptive Behavior Of Penned Hen Pheasants, K. L. Cool Jan 1971

Effects Of Chick Stimuli And Dieldrin On Adoptive Behavior Of Penned Hen Pheasants, K. L. Cool

Electronic Theses and Dissertations

Studies to determine the effect of chick stimuli and dieldrin on adoptive behavior of penned hen pheasants were conducted in 1969 and 1970. Results indicated that whether caged hens saw or heard chicks had no effect on adoption or killing of chicks. Hens receiving sound stimuli and sight-and-sound stimuli from chicks responded similarly to hens receiving no stimuli. Sub-lethal doses of dieldrin also had no effect on chick adoption under the conditions of this study. Results demonstrated that non-incubating pheasant hens will adopt and brood orphan chicks. During the 2 years of the study, respectively, 37 and 49 percent of …

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Phytoplankton Dynamics Of Two Northern Prairie Lakes And Possible Relations To Dissolved Nutrients, Alan B. Hauber Jan 1971

Phytoplankton Dynamics Of Two Northern Prairie Lakes And Possible Relations To Dissolved Nutrients, Alan B. Hauber

Electronic Theses and Dissertations

Phytoplankton populations in Enemy Swim Lake were observed to be quite different. Although these lakes lie within the same geographic area (Coteau des Prairies), major differences in water quality were recorded. The differences in water quality were reflected in the phytoplankton populations and appeared to be influenced by the agricultural practices on the watersheds. Enemy Swim Lake was basically a diatom lake while Lake Herman contained mostly blue-green algae. Genera of algae found in Enemy Swim Lake were: Anabaena, Aphanizomenon, Lyngbya, Pediastrum, Staurastrum, Dinobyron, Asterionella, Fragilaria, Melosira, Stephanodiscus, and Ceratium. All of the above genera occurred in Lake Herman except …

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Population Dynamics Of The Mourning Dove In South Dakota, Leslie A. Rice Jan 1971

Population Dynamics Of The Mourning Dove In South Dakota, Leslie A. Rice

Electronic Theses and Dissertations

Mourning dove bandings in South Dakota totaled 44,842 from 1917 through 1970. Adult bandings totaled 44.4 percent of all bandings while immatures, juveniles, locals, and unknown age were 41.3, 0.8, 12.8, and 0.7 percent, respectively. Recoveries totaled 2.8 percent of the banded population, 2.5 percent from hunting and 0.5 percent from non-hunting. Annual mortality estimates of local (nestling) bandings from 1956-61 were between 54.4 and 64.5 percent. Subsequent adult mortality from local bandings was between 51.0 and 52.4 percent. Mean annuals mortality estimates of flying doves banded from 1964-69 were calculated using composite dynamic, composite time-specific, relative recovery rate, a …

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Nutrient Transport In The Lake Poinsett System, Jack M. Skille Jan 1971

Nutrient Transport In The Lake Poinsett System, Jack M. Skille

Electronic Theses and Dissertations

Concentrations and loads of nutrients transported through the Lake Poinsett system were monitored from April 1, 1970 to April 1, 1971. An annual 2.07x 10~ m3 surface discharge into Lake Poinsett transported 1.66 x 104 kg (PO4) phosphorus, 1.28 x 104 kg nitrate nitrogen, and 3.90 x 104 kg organic carbon. The Big Sioux River-Dry Lake system contributed 63% of the phosphorus, 45% of the nitrate nitrogen, and 43% of the organic carbon load. The remaining portion entered Lake Poinsett from the Lake Albert drainage. Of the annual load of nutrients transported into Lake Poinsett, 33% of the nitrate nitrogen …

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A Clinico-Pathologic Study Of Botulism In Ring-Necked Pheasants, Hazel J. Shave Jan 1971

A Clinico-Pathologic Study Of Botulism In Ring-Necked Pheasants, Hazel J. Shave

Electronic Theses and Dissertations

Toxins were produced from 6 strains of Cl. Botulinum, 2 of which killed pheasants. Inoculated birds were observed and a description of the progression of signs of the disease is given. Juvenile pheasants were inoculated with Types A and C toxin intramuscularly and were given the toxin orally. These birds were observed and their clinical signs noted. Adult pheasants were inoculated with toxoid prepared from type C toxin and commercial toxoid; injections were repeated in 21 days. Fourteen days following the final injection, the birds were challenged with toxin. Those protected with toxoid survived, while those receiving saline succumbed. Gross …

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Macroscopic Benthos Populations And Taxonomy Of The Family Chironomidae In Lake Poinsett, South Dakota, Stephen B. Smith Jan 1971

Macroscopic Benthos Populations And Taxonomy Of The Family Chironomidae In Lake Poinsett, South Dakota, Stephen B. Smith

Electronic Theses and Dissertations

Benthos samples were collected in Lake Poinsett, a highly eutrophic eastern South Dakota lake, from March 1970 through February 1971. The lake bottom was divided into three substrate types (sand, sand-sapropel mixture and sapropel) and the percent of each substrate type was calculated. Nineteen macroscopic genera were taken from ten sampling stations located throughout the lake. Descriptions are presented for organisms in this group. Diversity of organisms was greatest in the sand substrates, in that all 19 genera were collected. Chironomus spp. (Chironomus plomosus, Chironomus attenuates and six unidentified species) was the most abundant group of organisms and occurred most …

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Effects Of Dieldrin On The Social Interactions Of Penned Pheasants And Chickens, Nancy Hayden Field Jan 1971

Effects Of Dieldrin On The Social Interactions Of Penned Pheasants And Chickens, Nancy Hayden Field

Electronic Theses and Dissertations

Studies to determine the effects of dieldrin on social hierarchy of pheasants and chickens were initiated in 1970. Social interactions were observed among groups of pheasant chicks, adult cock and hen pheasants and peck-order development among groups of young pheasants. To determine the effects of dieldrin on the pecking behavior of individual birds, pairs of pheasants and pairs of chickens were placed in a neutral cage. When patterns of dominance and subordination were consistent, dieldrin in capsules (4 mg to pheasants and 6 and 10 mg to chickens twice weekly) was given to one member of each pair and birds …

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