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- Title
- Searching for Evidence of Endocrine-Disrupting Compounds in Gambusia holbrooki.
- Creator
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Hollan, Brooke, 2019 STEM Undergraduate Research and Internship Symposium
- Abstract / Description
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In order to aid in furthering the knowledge of how Gambusia holbrooki, or mosquitofish, are being affected by chemicals that infiltrate their habitats, fish were caught from two sites, permitting that they found their way into the breder trap. Upon capture, the anal rays of the fish were measured and examined, and the ratio of anal ray 4 length to anal ray 6 length were calculated for each fish. This ratio can be used to determine if masculinization took place within the female specimens,...
Show moreIn order to aid in furthering the knowledge of how Gambusia holbrooki, or mosquitofish, are being affected by chemicals that infiltrate their habitats, fish were caught from two sites, permitting that they found their way into the breder trap. Upon capture, the anal rays of the fish were measured and examined, and the ratio of anal ray 4 length to anal ray 6 length were calculated for each fish. This ratio can be used to determine if masculinization took place within the female specimens, indicating the presence of endocrine-disrupting chemicals in the water. These chemicals can affect the endocrine system, which is vital in reproduction, growth, and metabolism. It was found that some females from both collection sites experienced masculinization. Additionally, these measurements were taken twice by two different personnel that could later be used to test the reproducibility of the data. It was shown that the data, on average, was reproduced about 90% of the time. The effects experienced by these fish could possibly be applied to humans as Gambusia are a good model organism, and therefore, testing done on this species can possibly be important to society.
Show less - Date Issued
- 2019
- Identifier
- fgcu_UGR_0133
- Format
- Set of related objects
- Title
- Water Quality Assessment of the Pithlachascotee River Following Remediation Programs.
- Creator
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Southwest Florida Water Management District City of New Port Richey Paso County and University of South Florida - Department of Marine Science
- Date Issued
- 1997
- Identifier
- fgcu_swfe_0875
- Format
- Document (PDF)
- Title
- Impacts of a Wildfire on Southwest Florida Wetland and Upland Habitats Invaded by the Australian Paperbark Tree, Melaleuca Quinquenervia.
- Creator
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Brooks, Brenda
- Abstract / Description
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Conservation of natural habitats is a pressing issue in Florida and measures are taken to understand the dynamics of invasive exotic species, such as Melaleuca quinquenervia (Cav.) Blake, in these systems. Melaleuca quinquenervia, one of Florida’s most problematic invasive exotic species, is present on the campus of Florida Gulf Coast University (FGCU), located on 308 ha in Lee County, Florida. Over 162 ha of the campus were naturally wetland or upland preserves that have been undergoing...
Show moreConservation of natural habitats is a pressing issue in Florida and measures are taken to understand the dynamics of invasive exotic species, such as Melaleuca quinquenervia (Cav.) Blake, in these systems. Melaleuca quinquenervia, one of Florida’s most problematic invasive exotic species, is present on the campus of Florida Gulf Coast University (FGCU), located on 308 ha in Lee County, Florida. Over 162 ha of the campus were naturally wetland or upland preserves that have been undergoing restoration by removal of invasive exotic species. Restoration approaches include hand removal, mechanical removal, herbicide treatment, biological control agents (snout weevil, Oxyops vitiosa; psyllid fly, Boreioglycaspis melaleucae), and replanting of native vegetation. In May 2004, a wildfire burned approximately 121 ha in the southern half of the FGCU campus. To investigate the affects of fire on M. quinquenervia-invaded lands, four transects were established in the burned areas: (1) a restored wetland/upland ecotone with low infestation; (2) a restored wetland with previously high infestation, replanted with natives following exotic removal; (3) a wetland with high infestation; and (4) a restored wetland/upland ecotone with mature native vegetation remaining after exotic removal. In this thesis I report on: (1) the degree that M. quinquenervia infestation, relative to the fire, influences native mortality, (2) the responses of M. quinquenervia to wildfire in south Florida, and (3) the dynamics of post-fire recovery of M. quinquenervia. The results of this study suggest that greater M. quinquenervia infestations in burned areas significantly increase native plant mortality but also result in significant M. quinquenervia mortality. Mortality of smaller stem sizes of M. quinquenervia trees was significantly greater than that of larger stem sizes in burned areas. Biological control agents survived this fire and readily re-invaded M. quinquenervia-infested areas. This wildfire in combination with biological control agents present appeared to effectively decrease the number of M. quinquenervia. The implication of this work supports the suggestion that introduced invasive exotic species change the historical role that fire has played in south Florida. Fire as a land management tool holds promise to help control M. quinquenervia, but demands more study on our altered landscapes.
Show less - Date Issued
- 2008
- Identifier
- fgcu_ETD_0407
- Format
- Document (PDF)
- Title
- Ground-water Quality of the Southwest Florida Water Management District: Southern Region, Section 2.
- Creator
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Jones, Gregg W., Florida, Southwest Florida Water Management District (Fla.)
- Abstract / Description
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This report provides a detailed description of the ground-water hydrology and hydrochemistry of the Southwest Florida Water Management District (SWFWMD). It covers the Southern Region of the District, including Charlotte, DeSoto, Hardee, Highlands, Manatee, and Sarasota counties. The report is the result of an extensive ground-water quality sampling, data analysis, and interpretation effort by the Ambient Ground-Water Quality Monitoring Program at the SWFWMD. It includes information on...
Show moreThis report provides a detailed description of the ground-water hydrology and hydrochemistry of the Southwest Florida Water Management District (SWFWMD). It covers the Southern Region of the District, including Charlotte, DeSoto, Hardee, Highlands, Manatee, and Sarasota counties. The report is the result of an extensive ground-water quality sampling, data analysis, and interpretation effort by the Ambient Ground-Water Quality Monitoring Program at the SWFWMD. It includes information on stratigraphy, structure, hydrostratigraphy, potentiometric surface, aquifer recharge, aquifer use, and ground-water quality. The ground-water quality chapter includes regional maps of the concentrations for 26 of the chemical parameters obtained from ground-water samples.
Show less - Date Issued
- 1990
- Identifier
- 39118765, fgcu_swfe_0004
- Format
- Document (PDF)
- Title
- A Reconstruction of Past Intense Hurricane Landfalls in Estero Bay Utilizing Back-Barrier Lagoonal Sediments.
- Creator
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Culligan, Nicholas
- Abstract / Description
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As hurricanes are one of nature’s most destructive forces, patterns in the recurrence intervals of intense hurricane landfalls are important to understand. Unfortunately, the modern instrumental record exists only as far back as 1860, which does not allow for geologically long-term hurricane trends to be studied. Paleotempestology is the study of ancient hurricane by means of sediment proxies, which allows for the hurricane record to be extended to before the modern record. Utilizing sediment...
Show moreAs hurricanes are one of nature’s most destructive forces, patterns in the recurrence intervals of intense hurricane landfalls are important to understand. Unfortunately, the modern instrumental record exists only as far back as 1860, which does not allow for geologically long-term hurricane trends to be studied. Paleotempestology is the study of ancient hurricane by means of sediment proxies, which allows for the hurricane record to be extended to before the modern record. Utilizing sediment cores that contain hurricane overwash layers (tempestites), the occurrence of hurricanes can be confirmed using moisture content, inorganic content, grain size analysis, and radiometric dating. Estero Bay is in a hurricane prone and extremely populated area. The recurrence interval for catastrophic hurricanes and the strength of the storm surge of hurricanes in this area is important to determine. This study utilizes paleotempestology to extend the hurricane record of Estero Bay and create a timeline for catastrophic hurricanes that have made landfall here. Additionally, this study serves to create a comprehensive guide to tempestite types found in Estero Bay and Southwest Florida. Hurricane Irma also occurred during the study period which allowed for the unique opportunity to study the tempestite deposition from a hurricane in which all parameters are known. Four confirmed tempestites from two sites ranging in age from 60-2000 years before present (YBP) were identified and classified. Additionally, characteristics and long-term trends of Estero Bay back-barrier lagoons were determined. This study is only the second paleotempestology study in Southwest Florida and the first which investigates an area that directly affects tens of thousands of people.
Show less - Date Issued
- 2018-08-24
- Identifier
- fgcu_ETD_0259
- Format
- Document (PDF)