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- Drosophila melanogaster (3)
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- Benthos -- Florida -- Merritt Island (1)
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Articles 1 - 16 of 16
Full-Text Articles in Life Sciences
Compartments In The Imaginal Wing Disc Of Drosophila Melanogaster, Scott C. Fogerty
Compartments In The Imaginal Wing Disc Of Drosophila Melanogaster, Scott C. Fogerty
Retrospective Theses and Dissertations
No abstract provided.
Developmental Analysis Of The Tumorous-Head Eye-Antennal Disc In Drosophila Melanogaster: Fate Map And In Vivo Culture, Deborah J. Andrew
Developmental Analysis Of The Tumorous-Head Eye-Antennal Disc In Drosophila Melanogaster: Fate Map And In Vivo Culture, Deborah J. Andrew
Retrospective Theses and Dissertations
No abstract provided.
The Gradient Effect Of Homoeotic Transformations In The Tumorous-Head Mutant Of Drosophila Melanogaster, Julia L. Cook
The Gradient Effect Of Homoeotic Transformations In The Tumorous-Head Mutant Of Drosophila Melanogaster, Julia L. Cook
Retrospective Theses and Dissertations
Abnormalities in the eye of tumorous-head Drosophila melanogaster were compositely mapped to their respective positions in an archetypal eye. A dorso-ventrally oriented restriction line in the posterior eye, similar to that observed by Campos-Ortega and Waitz (1978) and Baker (1978) through clonal analysis, was observed. Restrictive areas that parallel and probably coincide with hose previously disclosed by Campos-Ortega (1978) were also demonstrated in both the dorsal and ventral eye. Transformation of tumorous-head Drosophila melanogaster were examined in order to investigate region specific correlations between head structure and their homoeotic replacements. Five different tumorous-head strains were analyzed and compared for maximum …
Summer-Season Populations Of Epibenthic Marine Fishes In The Indian River Lagoon System, Florida, Timothy J. Mulligan
Summer-Season Populations Of Epibenthic Marine Fishes In The Indian River Lagoon System, Florida, Timothy J. Mulligan
Retrospective Theses and Dissertations
Epibenthic marine fish populations were sampled in order to establish quantitative base-line data for use in long term monitoring of the northern Indian River lagoon system, Florida. Fish samples were taken by trawling monthly at 8 fixed stations from June through September, 1979 and 1980. Fifty-seven fish species representing 29 families were collected. The fish community was numerically dominated by a very few species. Anchoa mitchilli alone accounted for 87% of the 105,853 individuals collected. Abundance, domin ance, and species diversity were compared among the three lagoon subdivisions, Mosquito Lagoon, Indian River, and Banana River. Greater numbers of fishes were …
Movements And Feeding Ecology Of Immature Green Turtles (Chelonia Mydas) In Mosquito Lagoon, Florida, Mary T. Mendonca
Movements And Feeding Ecology Of Immature Green Turtles (Chelonia Mydas) In Mosquito Lagoon, Florida, Mary T. Mendonca
Retrospective Theses and Dissertations
The seasonal and diel movements of fourteen immature green turtles (Chelonia mydas) in Mosquito, Lagoon, Florida were monitored using sonic telemetry. The feeding ecology of this turtle population was also studied using dissection and stomach flushing techniques. An attempt was made to relate the movement patterns of the turtles to their feeding habits. The immature green turtles were found to make seemingly random, long distance movements (X╠äkm moved/day=7.79) and to remain in deeper waters (X╠ädepth=1.63m), apparently not feeding, when water temperatures fell below 19┬░C. When average water temperatures ranged between 19-25┬░C, the turtles were found primarily in shallow waters (X╠ädepth=1.1m) …
The Microbial Biochemical Potential Of Two Detention-Retention Marshes In The Kissimmee River Valley Watershed, Douglas A. Winkelmann
The Microbial Biochemical Potential Of Two Detention-Retention Marshes In The Kissimmee River Valley Watershed, Douglas A. Winkelmann
Retrospective Theses and Dissertations
One of the major programs to abate the deterioration of water quality in the Lake Okeechobee watershed was the addition of detention-retention facilities. The microbial biochemical potential of two different detention-retention marshes in the Kissimmee River Valley were examined to determine their effectiveness to improve water quality. The kinetics of decomposition and nutrient mineralization and assimilation, as mediated by microorganisms, and the enumeration of microorganisms capable of utilizing various substrates were studied. Various communities within each marsh were studied during a 2-year period. The decomposition rates of 3 plant substrates were determined. Chitin was used as a standard for organic …
Opportunistic Species Of Macrobenthos In A Sewage-Polluted Lagoon, And An Analysis Of The Indicator Concept, Raymond E. Grizzle
Opportunistic Species Of Macrobenthos In A Sewage-Polluted Lagoon, And An Analysis Of The Indicator Concept, Raymond E. Grizzle
Retrospective Theses and Dissertations
No abstract provided.
Population Structure And Reproduction In The Introduced Florida Population Of The Pike Killifish, Belonesox Belizanus (Pisces: Poeciliidae), James S. Turner
Population Structure And Reproduction In The Introduced Florida Population Of The Pike Killifish, Belonesox Belizanus (Pisces: Poeciliidae), James S. Turner
Retrospective Theses and Dissertations
The pike killifish, Belonesox belizanus Kner, is the largest member of the live-bearing family Poeciliidae. The species is native to Central America, and was introduced into Dade County, Florida in 1957. B. belizanus is primarily piscivorous, and has been identified as a potential ecological "problem" species for Florida due to its heavy predation on small native fishes, especially the mosquitofish (Gambusia affinis). The population structure and reproduction of the Florida population were investigated in this study from field samples and aquarium observations. The mean standard length (SL) of mature females was about 103 mm. Most females larger than 75 mm …
The Effects Of Grass Carp (Ctenopharyngodon Idella Val.) Upon The Submersed Macrophytic Vegetation In Central Florida Lakes, Winston K. Borkowski
The Effects Of Grass Carp (Ctenopharyngodon Idella Val.) Upon The Submersed Macrophytic Vegetation In Central Florida Lakes, Winston K. Borkowski
Retrospective Theses and Dissertations
The biomass of the submersed macrophytic vegetation in four hydrilla (Hydrilla verticillata Royle) infested lakes in central Florida was monitored for one year. Lake Orienta and Little Lake Fairview received 2,320 and 960 grass carp, respectively, while Clear Lake and Lake Mann did not receive grass carp. Hydrilla was eliminated in Lake Orienta within six months of stocking; the lake was stocked at 19 grass carp/mt hydrilla (45 fish/ha). Hydrilla was not eliminated from Little Lake Fairview which contained 9 grass carp/mt hydrilla (30 fish/ha). The growth of hydrilla was restricted in Little Lake Fairview which produced 0.380 mt hydrilla, …
Seasonal Periodicity Of Periphytic Algae In Relation To Water Quality In Three Florida Experimental Ponds, Michael J. Gilbrook
Seasonal Periodicity Of Periphytic Algae In Relation To Water Quality In Three Florida Experimental Ponds, Michael J. Gilbrook
Retrospective Theses and Dissertations
Periphytic algae biomass, periphyton taxonomic composition and water quality were monitored from October, 1978 through October, 1979 in three experimental ponds on the University of Central Florida campus, Orlando, Florida. Differences in the abundance and seasonal periodicity of phytoplankton in the ponds presumably arose from intrinsic differences in the nature of the pond sediments. Ceramic tile and pressboard wood artificial substrates were sampled at two-month intervals to provide estimates of periphyton biomass and productivity; there was no significant difference in algal biomass on wood and tile substrates. Algal productivity on continuous-immersion (cumulative) substrates which supported a large accumulation of periphyton …
The Hatching And Emergence Of Loggerhead Turtle (Caretta Caretta) Hatchlings, Richard J. Demmer
The Hatching And Emergence Of Loggerhead Turtle (Caretta Caretta) Hatchlings, Richard J. Demmer
Retrospective Theses and Dissertations
Loggerhead turtle (Caretta caretta) eggs were collected at the time of laying during the summer of 1977 on the beaches of Canaveral National Seashore and the Merritt Island National Wildlife Refuge in Brevard County, Florida. The eggs were placed in land-lines buckets and maintained at ambient temperature in a house trailer hatchery. After 50 to 55 days of incubation whole or partial clutches were transferred to glass observation containers and covered to a depth of 20 cm. Hatching and emergence behavior were visually observed and activity was timed on an event recorder that was activated by four motion switches placed …
Nutrient Retention In Shallow Reservoirs Using Selected Aquatic Macrophytes, Phillip D. Sacco
Nutrient Retention In Shallow Reservoirs Using Selected Aquatic Macrophytes, Phillip D. Sacco
Retrospective Theses and Dissertations
A field experiment was conducted to evaluate the possibility of using shallow reservoirs containing aquatic plants to reduce excess nutrient levels of agricultural drainage effluent from organic soils. The reservoir systems consisted of three small reservoirs in series, containing separate stands of Eichhornia crassipes, Egeria densa and Typha sp., and a single large reservoir containing equal areas of all three aquatic plants. A control reservoir without plants was included. Drainage water from organic soils was pumped through each reservoir at 39.6 l/sec., 6 hours per day, 6 days per week. the major nutrients monitored in theses flow-through systems included nitrate-N, …
An Experimental Study Of Dispersal Of The Cotton Rat, Sigmodon Hispidus, Stephen R. Stafford
An Experimental Study Of Dispersal Of The Cotton Rat, Sigmodon Hispidus, Stephen R. Stafford
Retrospective Theses and Dissertations
Dispersal of cotton rats was examined over an annual cycle of abundance by removal trapping in pine flatwoods. All cotton rats live-trapped at biweekly intervals on two 0.49 ha grids were removed, whereas rats on an adjacent control grid were tagged an released alive on site. The null hypothesis was that dispersing cotton rats would represent a random sample of sex and weight (age) classes from source populations, e.g. the control grid. Likewise, it was assumed that dispersal rates would be proportional to numerical changes in abundance on the control grid. Dispersing animals were clearly most prevalent on the removal …
The Diversity And Abundance Of The Benthic Macroinvertebrates In An Oligo-Mesotrophic Central Florida Lake, Jeffrey F. Spence
The Diversity And Abundance Of The Benthic Macroinvertebrates In An Oligo-Mesotrophic Central Florida Lake, Jeffrey F. Spence
Retrospective Theses and Dissertations
Benthic macroinvertebrates and physicochemical parameters were sampled monthly in Spring Lake, Florida from July, 1978, to June, 1979. Spring Lake is a slightly acidic, sand bottom lake located in the sandhill region of the Central Highlands. While submersed vegetation is not dense, the lake does contain an abundance of the endemic submersed plant Mayaca aubletii. The littoral zone is dominated by plants belonging to the genera Panicum, Nuphar, Hydrocotyle, Nymphaea, Satittaria, and Typha. The benthic macroinvertebrates collected consisted of 51 species; approximately 50 percent were in the family Chironomidae. The annual mean number of individuals was 947/m2. The mayfly Hexagenia …
Methane Production From Dairy Cattle Waste, Michael H. Scholla
Methane Production From Dairy Cattle Waste, Michael H. Scholla
Retrospective Theses and Dissertations
A microbiological and economic study of methane production from dairy cattle waste was performed. The profit potential of producing methane and other vendable products from dairy cattle wastes was studied using a computerized cost model. The unit gas cost ($/cu. ft. methane) was determined for refractory volatile solids (VS) concentrations between 52% and 28% (W/W). Reaction rate constants (RKO) between 5.92 x 109 and 1.24 x 1011 were used. Retention time (RT) was varied between 1 and 10 days. Total solids (TS) concentration was varied between 8% and 14%. Analyses were performed with and without a fertilizer plant option for …
Zooplankton Abundance And Diversity In Spring Lake, Florida, 1973-1976, Barry D. Billets
Zooplankton Abundance And Diversity In Spring Lake, Florida, 1973-1976, Barry D. Billets
Retrospective Theses and Dissertations
Seasonal variation in zooplanton abundance and diversity in Spring Lake, Florida was studies between 1973 - 1976. This clear, sand bottom lake is considered among the most oligotrophic in central Florida. Sixty rotifer species, sixteen cladoceran species, and seven copepod species were collected during the three year study. Annual mean zooplanton abundances ranged between 70 individuals/l and 80 individuals/l. Rotifers were more abundant than either cladocerans or adult copepods. Rotifers and immature crustaceans comprised nearly 75% of the annual mean zooplankton abundance. There was no significant difference (P < 0.05) between years for the annual mean abundance of zooplankton. The monthly mean abundance of cladocerans and adult copepods was generally less than 5 individuals/l. The greater abundance of rotifers in comparison to other zooplankton was mainly responsible for the variation in the values of the Shannon and Simpson Indices. The monthly mean Shannon Index was usually between 3.0 and 4.0. Seasonal differences in zooplankton abundance were apparently due to water temperature and specific conductivity for the 1974 - 1975 and 1975 - 1976 study years. Shannon diversity was significantly correlated with dissolved oxygen for the 1973 - 1974 and 1974 - 1975 study years.