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Primer Registro Del Tejedor Africano Ploceus Cucullatus En El Estado Miranda, Venezuela / First Record Of Village Weaver Ploceus Cucullatus In Miranda State, Venezuela, Hugo Rodríguez-García, Miguel Nieves
Primer Registro Del Tejedor Africano Ploceus Cucullatus En El Estado Miranda, Venezuela / First Record Of Village Weaver Ploceus Cucullatus In Miranda State, Venezuela, Hugo Rodríguez-García, Miguel Nieves
Revista Venezolana de Ornitología
The introduction of exotic species is one of the main threats to biodiversity. In Venezuela, several exotic birds have been recorded, most of them corresponding to trade species. The goal of this note is to report the presence of the Village Weaver Ploceus cucullatus in Miranda state. The observations were made on July 14, 2021 in the Nueva Casarapa lagoon located in Guatire. Forty five Village Weavers were recorded (32 males, 13 females) and a breeding colony with 50 nests was located. Three nests were measured and deposited in the Ornithology Collection of La Salle Natural History Museum, Caracas, Venezuela. …
Aves Introducidas En El Parque Nacional Henri Pittier, Venezuela / Introduced Birds To The Henri Pittier National Park, Venezuela, Alberto Fernández-Badillo
Aves Introducidas En El Parque Nacional Henri Pittier, Venezuela / Introduced Birds To The Henri Pittier National Park, Venezuela, Alberto Fernández-Badillo
Revista Venezolana de Ornitología
In order to assemble the historical information about the introduced birds reported in the Henri Pittier National Park and its areas of infl uence, an exhaustive literature review was performed based on 50 years of data. The work also reports on the current status of the species involved (established, not established), as well as their relative abundance and the potential threat to ecosystem and agriculture. A total of eight introduced bird species have been recorded in the Henri Pittier National Park. Most species were found still in their introduction stage, except for the Cattle Egret Bubulcus ibis and the Rock …
Using Fine-Scale Aquatic Habitat Data To Construct Dreissenid Sdms In The Laurentian Great Lakes, Grace C. Henderson
Using Fine-Scale Aquatic Habitat Data To Construct Dreissenid Sdms In The Laurentian Great Lakes, Grace C. Henderson
USF Tampa Graduate Theses and Dissertations
The invasion of the Laurentian Great Lakes by aquatic invasive species (AIS) has been the subject of investigation for decades, due to their dramatic alterations to the ecosystem and high economic costs. Two AIS with the largest impacts are dreissenid zebra and quagga mussels, and though these species have been studied extensively, questions remain about what factors control their distributions, and whether lake warming will alter these distributions. Species distribution models (SDMs) offer a powerful tool to examine the relationship between species presences and environmental variables, which are typically bioclimactic data. The creation of the Aquatic Habitat (AqHab) dataset containing …
Habitat Use And Movements Of Feral Mallards (Anas Platyrhynchos) And Invasive Muscovy Ducks (Cairina Moschata) In Tampa, Florida, Joni Downs, Mehrdad Vaziri, Lucy Deba Enomah, Zachary J. Smith
Habitat Use And Movements Of Feral Mallards (Anas Platyrhynchos) And Invasive Muscovy Ducks (Cairina Moschata) In Tampa, Florida, Joni Downs, Mehrdad Vaziri, Lucy Deba Enomah, Zachary J. Smith
Florida Field Naturalist
Feral Mallards (Anas platyrhynchos) and invasive Muscovy Ducks (Cairina moschata) are common waterfowl in urban areas in many parts of the world, though relatively little is known about their habits and movements. This study quantified the fine-scale movements and habitat-use patterns of feral Mallards and Muscovy Ducks in an urban area of Tampa, Florida, from hour-long observational and tracking data. Mallards spent more time in water than Muscovy Ducks (41.0% vs. 9.1%), less time in grass (2.8% vs. 21.5%), and less time in urban areas (0.5% vs. 8.0%). Times spent by Mallards and Muscovy Ducks in …
Epigenetic Potential In An Introduced Passerine, Haley E. Hanson
Epigenetic Potential In An Introduced Passerine, Haley E. Hanson
USF Tampa Graduate Theses and Dissertations
Epigenetic modifications play a critical role in numerous processes throughout the lifetime of an organism by influencing gene regulation. Responsive to both endogenous cues and external stimuli, epigenetic modifications are key mechanisms underlying phenotypic plasticity. Epigenetic potential, or the capacity for phenotypic plasticity mediated by epigenetic modifications, can be encoded within the genome via genetic variation underlying aspects of epigenetic modifications. For example, one type of epigenetic modification, DNA methylation, predominately occurs at CpG motifs in vertebrates. The number of CpG sites within the genome then represents the capacity for DNA methylation to occur and is one form of epigenetic …
Density-Dependent Condition And Growth Of Invasive Lionfish In The Northern Gulf Of Mexico, Kristin A. Dahl, Morgan A. Edwards, William F. Patterson Iii
Density-Dependent Condition And Growth Of Invasive Lionfish In The Northern Gulf Of Mexico, Kristin A. Dahl, Morgan A. Edwards, William F. Patterson Iii
C-IMAGE Publications
Absent natural population control, invasive red lionfish Pterois volitans (hereafter, lionfish) have reached record densities in the northern Gulf of Mexico (nGOM), though the role of density dependence on their population dynamics remains poorly understood. This study examined the effects of population density, sex, and habitat on lionfish condition (i.e. mass relative to total length) and size-at-age. Lionfish density was estimated with a remotely operated vehicle during 2010-2017 at a series of nGOM natural (n = 16) and artificial (n = 22) reefs, and individual lionfish (n = 3296) were sampled at additional reefs in the same system between 2013 …
Flames And Frogs – The Impact Of Environmental Disturbances On Host-Parasite Dynamics, Nicole Ortega
Flames And Frogs – The Impact Of Environmental Disturbances On Host-Parasite Dynamics, Nicole Ortega
USF Tampa Graduate Theses and Dissertations
The successful completion of this work is dedicated first to my grandparents for having always shown their unwavering love and encouragement in my journeys (most of which they kindly and politely only pretended to understand) and for having also served as life-long role models who upheld an unparalleled work ethic. To many whom I consider to be my chosen family, especially Ann Williams and Brittany Sears, who kept me laughing, but more importantly, kept my crazy train from derailing during these tumultuous years. To Wayne Price and Tom Jackman, who fostered the success of my career and are the epitome …
Habitat Use And Behaviours Of Introduced Muscovy Ducks (Cairina Moschata) In Urban And Suburban Environments, Joni Downs, Rebecca Loraamm, James Howard Anderson Jr., Jacqueline Perry, Jessica Bullock
Habitat Use And Behaviours Of Introduced Muscovy Ducks (Cairina Moschata) In Urban And Suburban Environments, Joni Downs, Rebecca Loraamm, James Howard Anderson Jr., Jacqueline Perry, Jessica Bullock
Suburban Sustainability
Muscovy ducks (Cairina moschata) are native to South America, Central America, and Mexico. The species is commonly domesticated and raised for meat across the globe. Escaped or intentionally introduced populations have become established in many suburban areas, although they are little studied. A total of 642 individual time-activity budgets were collected for invasive Muscovy ducks in Tampa, Florida, USA, in order to quantify habitat use and behavioural patterns. Muscovy ducks utilized a variety of cover types, including open water, shoreline, grass, tree, shrub, and urban habitats. Muscovy ducks foraged by dabbling, gleaning, grazing, and probing, while occasionally obtaining, …
Experimental Assessment Of Lionfish Removals To Mitigate Reef Fish Community Shifts On Northern Gulf Of Mexico Artificial Reefs, Kristin A. Dahl, William F. Patterson Iii, Richard A. Synder
Experimental Assessment Of Lionfish Removals To Mitigate Reef Fish Community Shifts On Northern Gulf Of Mexico Artificial Reefs, Kristin A. Dahl, William F. Patterson Iii, Richard A. Synder
C-IMAGE Publications
Substantial declines in reef fishes were observed at northern Gulf of Mexico artificial reef sites between 2009−2010 and 2011−2012, a period that bracketed the appearance of invasive lionfish in this ecosystem. Small demersal reef fishes, the predominant prey of lionfish in other systems, displayed the greatest declines. However, a confounding factor during this time was the Deepwater Horizon Oil Spill (DWH) in summer 2010. In some areas, targeted lionfish removals have been demonstrated to mitigate negative effects on native fishes. Therefore, we conducted a 2 yr experiment to examine the effectiveness and ecological benefits of targeted lionfish removals at artificial …
Habitat-Specific Density And Diet Of Rapidly Expanding Invasive Red Lionfish, Pterois Volitans,, Populations In The Northern Gulf Of Mexico, Kristen A. Dahl, William F. Patterson Iii
Habitat-Specific Density And Diet Of Rapidly Expanding Invasive Red Lionfish, Pterois Volitans,, Populations In The Northern Gulf Of Mexico, Kristen A. Dahl, William F. Patterson Iii
C-IMAGE Publications
Invasive Indo-Pacific red lionfish, Pterois volitans, were first reported in the northern Gulf of Mexico (nGOM) in summer 2010. To examine potential impacts on native reef fish communities, lionfish density and size distributions were estimated from fall 2010 to fall 2013 with a remotely operated vehicle at natural (n = 16) and artificial (n = 22) reef sites. Lionfish (n = 934) also were sampled via spearfishing to examine effects of habitat type, season, and fish size on their diet and trophic ecology. There was an exponential increase in lionfish density at both natural and artificial reefs over the study …
Physiological And Behavioral Mechanisms Of Range Expansion In The House Sparrow (Passer Domesticus), Andrea Lyn Liebl
Physiological And Behavioral Mechanisms Of Range Expansion In The House Sparrow (Passer Domesticus), Andrea Lyn Liebl
USF Tampa Graduate Theses and Dissertations
Introduced species cause both considerable ecological and economic damage every year. However, not much is known about how certain species are able to establish and spread beyond the site of initial introduction, whereas others do not. Species undergoing range expansion following an introduction may prove to be a valuable resource to invasion biology, but may also be informative in light of species' responses to changing environments (i.e. global climate change). Here, I took advantage of an ongoing range expansion of an introduced vertebrate species. House sparrows (Passer domesticus) were introduced to Mombasa, Kenya in the 1950s and have subsequently expanded …
Tropical Birds As Native And Exotic Seed Dispersers In Monteverde, Costa Rica, May 2011, Katherine M. Johnson
Tropical Birds As Native And Exotic Seed Dispersers In Monteverde, Costa Rica, May 2011, Katherine M. Johnson
Tropical Ecology and Conservation [Monteverde Institute]
In Monteverde the practice of using non-native garden ornamentals is widespread. This practice could be economically and ecologically costly in the future if these non-native species escape gardens. Because many non-native invasive fruits are dispersed by birds, this study assesses non-native and native fruit species and tropical birds as non-native and native fruit dispersers. To determine whether fruits from an introduced species or a native species were preferred by dispersers and more frequently visited by birds, fruits from, Rubus rosifolius, a common roadside non-native, and Acnistus arborescens a common native garden ornamental were monitored for presence or absence and levels …
Heterogeneous Stress Response In A Clonal Invader (Imperata Cylindrica): Implications For Management, Sarah Grace Sanford
Heterogeneous Stress Response In A Clonal Invader (Imperata Cylindrica): Implications For Management, Sarah Grace Sanford
USF Tampa Graduate Theses and Dissertations
Life history traits such as growth, survival, and clonality can vary within a population. When such variation exists in a population of an invasive species, it can affect population dynamics, and if any part of the variation has a genetic basis the population can evolve in response to control regimes. Evolutionary responses to control efforts may shift the population towards a few more resilient genotypes, or towards different types in different microenvironments, depending on the scale of gene flow with respect to the patchiness of the environment. The purpose of this study is to examine whether the application of stress …
Comparing The Effects Of The Exotic Cactus-Feeding Moth, Cactoblastis Cactorum (Berg) (Lepidoptera: Pyralidae) And A Native Cactus-Feeding Moth, Melitara Prodenialis (Walker) (Lepidoptera: Pyralidae) On Two Species Of Florida Opuntia, Amanda J. Baker
USF Tampa Graduate Theses and Dissertations
Exotic species are a great concern because of the possibility of negative effects once they become established. The exotic cactus moth, Cactoblastis cactorum has a reputation for being detrimental to Opuntia populations throughout Florida and the southeastern United States. Multiple projects are currently underway to attempt to contain and eradicate this species before it can migrate to the Opuntia-rich desert southwest and the agricultural Opuntia fields in the Mexican highlands. These projects have been undertaken without previous studies to determine what negative effects, if any, the moth is having on the common native Opuntia species. This is understandable; since it …