Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"gambusia"”.
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The Degree of Reproductive Isolation in Gambusia affinis and Gambusia geiseri
No abstract prepared.
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Dispersal Behavior Of Mosquitofish (gambusia Holbrooki)
Mosquitofish (Gambusia holbrooki) are native to the southeastern United States but invasive elsewhere, and are dominant predators in many ecosystems that they inhabit. Information on dispersal behavior will help better understand and predict mosquitofish metapopulation dynamics and invasions. I …
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Behavioral and Reproductive Plasticity in Eastern Mosquitofish (Gambusia Holbrooki) in Response to Predatory Cues
… I tested if a live-bearing non-ostariophysan, Gambusia holbrooki, exhibited a similar behavioral response to its injured conspecifics. I also examined the effects of exposure to this and other predatory cues during a single pregnancy cycle. I hypothesized that immediate exposure to the cues …
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Artificial Light at Night Alters Physiology, Behavior, and Reproduction in the Western Mosquitofish (Gambusia affinis)
… reproduction of a widespread freshwater fish. Gambusia affinis are small livebearing fish often found in urban streams. I exposed groups of female G. affinis to either a natural light cycle or a constant 24-hour light cycle (ALAN) in the laboratory for 60 days. In another experiment, I exposed …
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An experimental test of intra- and inter-specific competition between invasive western mosquitofish (Gambusia affinis) and native plains topminnow (Fundulus Sciadicus)
… Sciadicus) and invasive western mosquitofish (Gambusia affinis) at 16, 22, and 28 °C. Data were analyzed using the isodar theory, which assumes that animals are ideally distributed to maximize their fitness and thus their distributions measure the quality and quantity of habitat patches. This …
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An assessment of endocrine disrupting potential of a New Zealand pulp and paper mill effluent using rainbow trout Oncorhynchus mykiss and mosquitofish Gambusia affinis
… high suspended solids load. Two mosquitofish Gambusia affinis experiments were conducted, both consisted of a 21-day exposure using adult females. The first experiment was a multiple concentration exposure to primary and secondary treated effluents. A statistically significant masculinisation …
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Oviposition Site Selection By Mosquitoes: Predator-Released Kairomones And Responses To Different Taxa
… and certain species of fish, including Gambusia affinis. For my thesis I focused on mosquitoes of the genus Culex, and how they responded solely to the presence of kairomones (chemicals emitted by an organism and detected by an individual of another species; where only the receiver …
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Social learning and its effect on conservation efforts in the Barrens Topminnow: an evaluation of conditioning and social learning as a viable longterm solution to evolutionary traps
The invasive Western Mosquitofish (WMF), Gambusia affinis, has facilitated the extinction and endangerment of multiple freshwater fish species, including the Barrens Topminnow (BTM), Fundulus julisia. In my study, I investigated if BTMs are capable of socially learning conditioned predator …
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Overcoming evolutionary history: conditioning the endangered Barrens topminnow to avoid predation by the invasive Western mosquitofish
… predator: the Western Mosquitofish (WMF), Gambusia affinis. This study used conditioning to help the BTM escape its evolutionary trap, and data showed that conditioned fish responded significantly different to the presentation of WMF compared to control fish, and sampling following release …
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A Study of Asymmetry in Mosquitofish Populations in Polluted and Nonpolluted Environments Using a New Scale Staining Technique.
… compared in two populations of mosquitofish (Gambusia affinis) from polluted waters and two populations from nonpolluted waters. Two of the characters studied, pectoral fin rays and lateral line scales, showed no asymmetry in these populations and therefore provided no data for comparisons. A …
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Filogenia e classificação dos peixes poecilióideos (Cyprinodontiformes: Cyprinodontoidei)
… + Fluviphylax simplex))))))) (Tomeurus gracilis (Gambusia nicaraguensis (Alfaro huberi (Priapella compressa (Brachyrhaphys cascajalensis (Heterandria bimaculata + Priapichthys annectens))))) (Neoheterandria tridentiger ((Girardinus serripenis + Xenodexia ctenolepis) (Phallichthys fairweatheri …
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Friends in Low Places: Responses of a Benthic Stream Fish to Intra-Guild Alarm Cues
… recently-introduced Western Mosquitofish (Gambusia affinis), and native Oklahoma Salamanders (Eurycea tyrnerensis), all of whom are vulnerable to the same predators. We tested the responses of darters to the damage-released alarm cues of conspecifics (positive control), minnows, and …
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Effects of Extreme Flow Events on Community Composition and Habitat Complexity of Groundwater Dominated Systems
… observed, densities of surface water fishes (Gambusia), pelagic generalist fishes (Lepomis, Micropterus, Herichthys), pelagic fluvial fishes (Dionda, Notropis, and Astyanax), and benthic fishes (Etheostoma) generally were greater in high and moderate habitat complexity reaches than in lower …
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Acute and chronic effects of selenium on Daphnia pulex
… selenium. The 96 hr LC50 and EC50O values for Gambusia affinis and Physa sp. respectively, were 12.56 and 27.08 mg/l selenium. The sublethal effects of 0.2, 0.4, 0.6 and 0.8 mg/1 selenium on survival, growth and reproduction of Daphnia pulex were monitored for twenty-eight days. These results …
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Fish and mammals of the lower Calaveras River, Stockton, CA
… (Dorosoma petenense), and western mosquitofish (Gambusia aj]inis). Fish assemblage varied with changes in season and percent coverage of submerged aquatic vegetation (SA V). Bluegill and redear sunfish abundances were positively correlated. Largemouth bass and redear sunfish abundances were …
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Cognitive Abilities in Fish: Biological Predictors and Impact on Reproductive Success
… 1, I explore the ability of mosquitofish (Gambusia holbrooki) to express inhibitory control, an essential cognitive trait that inhibits impulsive actions in favour of delayed rewards. I show how sex, age, and personality can impact their inhibitory control. Chapter 2 investigates the effect …
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Cognitive Abilities in Fish: Biological Predictors and Impact on Reproductive Success
… 1, I explore the ability of mosquitofish (Gambusia holbrooki) to express inhibitory control, an essential cognitive trait that inhibits impulsive actions in favour of delayed rewards. I show how sex, age, and personality can impact their inhibitory control. Chapter 2 investigates the effect …
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