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Articles 1 - 9 of 9
Full-Text Articles in Physical Sciences and Mathematics
Fungal Control Methods, Diets And Water Temperatures Used To Culture Paddlefish, Polydon Spathula, Ronald L. Brandt
Fungal Control Methods, Diets And Water Temperatures Used To Culture Paddlefish, Polydon Spathula, Ronald L. Brandt
Electronic Theses and Dissertations
Studies were conducted at Gavins Point National Fish Hatchery, South Dakota, in 1976 and 1977, to evaluate the effects of diet and water temperature on growth and survival of paddlefish, Polyodon spathula, young, and the effects that fungicides have on hatching success and fry survival. The W-7 cool water diet was fed hourly and three times daily while the Liv commercial diet was fed hourly to paddlefish young for 40 days after swim-up. Average survival rate and total length of paddlefish fed W-7 hourly were 16.0% and 30 mm, those fed W-7 three times daily were 10.0% and 23 mm, …
Non-Game Birds In Relation To Habitat Variation On South Dakota Wetlands, Michael J. Weber
Non-Game Birds In Relation To Habitat Variation On South Dakota Wetlands, Michael J. Weber
Electronic Theses and Dissertations
Non-game birds on South Dakota wetlands were surveyed on 476 quarter sections representing the major portion of South Dakota excluding the Missouri River and its impoundments and the Black Hills. Two surveys were conducted, one in May and a second in June, in both 1975 and 1976. The distribution of 13 non-game species was analyzed by physiographic strata and wetland classification: red-winged blackbird {Agelaius phoeniceus), yellow-headed blackbird (Xanthocephalus xanthocephalus), Wilson's phalarope (Steganopus tricolor), black tern (Chlidonias niger), lesser yellowlegs (Totanus flavipes), sora {Porzana carolina), marbled godwit (Limosa fedoa), willet (Catoptrophorus semipalmatus), American avocet (Recurvirostra americana}, American bittern {Botaurus lentiginosus), great …
Diversity And Density Of Shelterbelt Bird Communities, Thomas E. Martin
Diversity And Density Of Shelterbelt Bird Communities, Thomas E. Martin
Electronic Theses and Dissertations
The number of bird species and the density of each species were monitored in 69 shelterbelts in eastern South Dakota during spring migration and breeding seasons in 1976 and 1977. A total of 44 different species of birds were found during breeding and 68 species during spring migration. Approximately 60 to 80% of the species in a shelterbelt eat insects as part of all of their diet. Most of these bird species are territorial. Usually only 1-2 pairs of a territorial species will reside in any one shelterbelt. This low density is caused by the limited habitat area that shelterbelts …
Diet And Nutrition Of The Pronghorn Antelope, Norman C. Messenger
Diet And Nutrition Of The Pronghorn Antelope, Norman C. Messenger
Electronic Theses and Dissertations
Pronghorn antelope (Antilocapra americana) in northwestern South Dakota consumed at least 32 different plants species. Major forage plants were big sagebrush (Artemisia tridentate), silver sage (A. cana), yellow sweet clover (Meliotus officinalis), gold aster (Chrysopsis villosa), and blue grama (Bouteloua gracilis). Cultivated small grain crops were not a major food source of pronghorn. Differences in diet composition, plant groups, plant groups and time of use and plant group, area, month interaction were significant. Average in vitro digestion of 31 food plants was 51 percent. Mean digestion of grasses was 57 percent, forbs 42 percent, and shrubs 55 percent. Yearling male …
Evaluation Of Fish Stocking In Southeastern South Dakota Ponds, Paul J. Peeters
Evaluation Of Fish Stocking In Southeastern South Dakota Ponds, Paul J. Peeters
Electronic Theses and Dissertations
A mail survey was sent to owners of 220 ponds which had received hatchery fish. Based on 187 pond owner responses, at most 45 (24%) of the ponds still contained the fishes stocked. Pond dryness and/or winterkill attributed to the failure of 121 (65%) of the ponds. A subsequent field survey of 30 ponds identified fish populations of recreational value. Attempts were made to identify important pond parameters that contributed to successful fish populations. Aᵼ (percent harvestable fish), F/C (forage to carnivore ratio), balance (in or out), and a scale of balance were the dependent variable used to describe successful …
Wildlife Habitat In The James River Valley, South Dakota, L. Paul Schneider
Wildlife Habitat In The James River Valley, South Dakota, L. Paul Schneider
Electronic Theses and Dissertations
A wildlife habitat inventory was conducted on the 12 485 ha study area of the James River floodplain in north-eastern South Dakota. Included were vegetation mapping, small mammal trapping, waterfowl breeding pair counts, waterfowl brood counts, bird census routes, and general observations. Natural vegetation consisted of 3181 ha of grassland, 2002 ha of woodland, 1115 ha of savannah, and 392 ha of marshland. Small mammal trapping revealed low densities of mostly white-footed mice (Peromyscus spp.). No vegetation type was more valuable to small mammals than any other. Waterfowl breeding pairs, mostly mallard, blue-winged teal, and wood duck, numbered 244 in …
Bird Utilization Of Woodland Habitat In The Eastern Quarter Of South Dakota, John M. Emmerich
Bird Utilization Of Woodland Habitat In The Eastern Quarter Of South Dakota, John M. Emmerich
Electronic Theses and Dissertations
Bird utilization of narrow, riparian woodland; riparian; block-like, tree claim; and linear, single-row windbreak habitats in the eastern quarter of South Dakota were studied during the spring migration, reproductive, and winter seasons. The relative importance of these three habitats and multi-row shelterbelt habitat was evaluated using bird species diversity (BSD), bird population density, and habitat preferences of individual bird species. Cluster analysis delineated distinctive vegetation cover types in each of the three habitats studied. Bird communities associated with each cover type were tabulated for comparison purposes and predication capabilities. Multiple regression analysis predicted physical and vegetation features of each habitat …
Breeding Biology And Prey Selection Of Ferruginous Hawks In Northwestern South Dakota, Charles L. Blair
Breeding Biology And Prey Selection Of Ferruginous Hawks In Northwestern South Dakota, Charles L. Blair
Electronic Theses and Dissertations
A study of the breeding biology and prey selection of ferruginous hawks (Buteo regalis) was conducted in northwestern South Dakota during 1976 and 1977. Twenty four pairs were located in 1976 and 18 pairs attempted to nest; 17 pairs located in 1977 attempted to nest. The ecological density of breeding pairs was approximately one per 100 km2. Young fledged per nesting attempt averaged 1.89 in 1976 and 2.29 in 1977. All but one nest were located in unbroken, lightly grazed prairie and all were situated on hills, buttes, or river cutbanks. General nest orientation was toward the south and west. …
Effects Of Grazing Systems On Sharp-Tailed Grouse Habitat, Samuel N. Mattise
Effects Of Grazing Systems On Sharp-Tailed Grouse Habitat, Samuel N. Mattise
Electronic Theses and Dissertations
Effects of grazing systems on sharp-tailed grouse (Pedioecetes phasianellus jamesi) nesting and brooding habitats in the Little Missouri National Grasslands of southwestern North Dakota were evaluated. Three grazing allotments with deferred-rotation grazing systems and three allotments with season-long grazing systems were randomly selected for study. Fifty measurements of vegetation were taken using the height-density pole on line transects in each of three range sites; rolling grasslands, upland grasslands and lowland draws. Vegetation was sampled in late spring, summer and fall of 1976 and early spring of 1977. Average height-density of vegetation for the season-long grazing system was significantly greater than …