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Articles 1 - 12 of 12
Full-Text Articles in Life Sciences
Bioaccumulation And Biomagnification Of Potential Toxic Elements (Ptes): An Avicennia Germinans–Uca Rapax Trophic Transfer Story From Jobos Bay, Puerto Rico, Michael Martinez-Colon, Henry Alegria, Hatice Kubra-Gul, Ashley Huber, Perihan Kurt-Karakus
Bioaccumulation And Biomagnification Of Potential Toxic Elements (Ptes): An Avicennia Germinans–Uca Rapax Trophic Transfer Story From Jobos Bay, Puerto Rico, Michael Martinez-Colon, Henry Alegria, Hatice Kubra-Gul, Ashley Huber, Perihan Kurt-Karakus
USF St. Petersburg campus Faculty Publications
In southern Puerto Rico along the coastline bordering the Jobos Bay National Estuarine Research Reserve, environmental encroachment has exposed mangrove forest to different sources of pollution. Potentially toxic element concentrations from the F1Tess (exchangeable), F4Tess (oxidizable), mangrove leaf litter (MLL), and fiddler crab whole body soft tissue were analyzed to assess the fate and transport of pollutants from the environment and its transition into flora-fauna via trophic transfer. Geo-accumulation factor values suggest the bay has experienced limited to no pollution when combining the concentrations of potentially toxic elements extracted from the F1Tess and F4Tess sediment fractions. These geochemical sedimentary compartments …
Heat, Health And Hatchlings: Associations Of In Situ Nest Temperatures With Morphological And Physiological Characteristics Of Loggerhead Sea Turtle Hatchlings From Florida, Kelsey Alexandra Fleming, Justin R. Perrault, Nicole I. Stacy, Christina M. Coppenrath, Alison M. Gainsbury
Heat, Health And Hatchlings: Associations Of In Situ Nest Temperatures With Morphological And Physiological Characteristics Of Loggerhead Sea Turtle Hatchlings From Florida, Kelsey Alexandra Fleming, Justin R. Perrault, Nicole I. Stacy, Christina M. Coppenrath, Alison M. Gainsbury
USF St. Petersburg campus Faculty Publications
Incubation temperatures, in addition to an embryo’s genetic makeup, are critical in many aspects of adequate sea turtle embryonic development. The effects of high and low incubation temperatures on hatchling quality have been previously examined; however, many of these studies were conducted on relocated or laboratory-reared nests, which do not accurately reflect natural nest temperature fluctuations. To observe the impacts of varying in situ incubation temperatures on loggerhead sea turtle (Caretta caretta) hatchling morphology, various health variables and locomotor performance, temperature data loggers were deployed in 15 loggerhead nests on Juno Beach, Florida, between May and July 2018. Over the …
The First Global Deep-Sea Stable Isotope Assessment Reveals The Unique Trophic Ecology Of Vampire Squid Vampyroteuthis Infernalis (Cephalopoda), A. V. Golikov, F. R. Ceia, R. M. Sabirov, J. D. Ablett, Ian G. Gleadall, Gudmundur Gudmundsson, Henk-Jan T. Hoving, Heather L. Judkins
The First Global Deep-Sea Stable Isotope Assessment Reveals The Unique Trophic Ecology Of Vampire Squid Vampyroteuthis Infernalis (Cephalopoda), A. V. Golikov, F. R. Ceia, R. M. Sabirov, J. D. Ablett, Ian G. Gleadall, Gudmundur Gudmundsson, Henk-Jan T. Hoving, Heather L. Judkins
USF St. Petersburg campus Faculty Publications
Vampyroteuthis infernalis Chun, 1903, is a widely distributed deepwater cephalopod with unique morphology and phylogenetic position. We assessed its habitat and trophic ecology on a global scale via stable isotope analyses of a unique collection of beaks from 104 specimens from the Atlantic, Pacific and Indian Oceans. Cephalopods typically are active predators occupying a high trophic level (TL) and exhibit an ontogenetic increase in δ15N and TL. Our results, presenting the first global comparison for a deep-sea invertebrate, demonstrate that V. infernalis has an ontogenetic decrease in δ15N and TL, coupled with niche broadening. Juveniles are mobile zooplanktivores, while larger …
Temporal Variability Of Polycyclic Aromatic Hydrocarbons In Deep-Sea Cephalopods Of The Northern Gulf Of Mexico, Isabel C. Romero, Heather L. Judkins, Michael Vecchione
Temporal Variability Of Polycyclic Aromatic Hydrocarbons In Deep-Sea Cephalopods Of The Northern Gulf Of Mexico, Isabel C. Romero, Heather L. Judkins, Michael Vecchione
USF St. Petersburg campus Faculty Publications
As part of the effort to understand the effects of the Deepwater Horizon Oil Spill (DWHOS), we analyzed tissue from five species of midwater oceanic cephalopods in the northern Gulf of Mexico (GoM) during three time periods, including one period sampled fortuitously just before the spill (2010), and two periods sampled after the spill (2011 and 2015–2016). The species, Japetella diaphana, Abralia redfieldi, Histioteuthis corona, Leachia atlantica, and Onychoteuthis banksii were collected in three geographic areas in the GoM (east, south and southeast of the Macondo wellhead). Results indicate a shift in the composition of polycyclic aromatic hydrocarbons (PAHs) in …
Novel Habitat Causes A Shift To Diurnal Activity In A Nocturnal Species, J. Sean Doody, Colin R. Mchenry, David Rhind, Simon Clulow
Novel Habitat Causes A Shift To Diurnal Activity In A Nocturnal Species, J. Sean Doody, Colin R. Mchenry, David Rhind, Simon Clulow
USF St. Petersburg campus Faculty Publications
Plastic responses may allow individuals to survive and reproduce in novel environments, and can facilitate the establishment of viable populations. But can novel environments reveal plasticity by causing a shift in a behavior as fundamental and conspicuous as daily activity? We studied daily activity times near the invasion front of the cane toad (Rhinella marina), an invasive species that has colonized much of northern Australia. Cane toads in Australia are nocturnal, probably because diurnal activity would subject them to intolerably hot and dry conditions in the tropical savannah during the dry season. Our study can demonstrate, however, that upon reaching …
Claw Morphometrics In Monitor Lizards: Variable Substrate And Habitat Use Correlate To Shape Diversity Within A Predator Guild, Domenic C. D'Amore, Simon Clulow, J. Sean Doody, David Rhind, Colin R. Mchenry
Claw Morphometrics In Monitor Lizards: Variable Substrate And Habitat Use Correlate To Shape Diversity Within A Predator Guild, Domenic C. D'Amore, Simon Clulow, J. Sean Doody, David Rhind, Colin R. Mchenry
USF St. Petersburg campus Faculty Publications
Numerous studies investigate morphology in the context of habitat, and lizards have received particular attention. Substrate usage is often reflected in the morphology of characters associated with locomotion, and, as a result, claws have become well-studied ecomorphological traits linking the two. The Kimberley predator guild of Western Australia consists of 10 sympatric varanid species. The purpose of this study was to quantify claw size and shape in the guild using geometric morphometrics, and determine whether these features correlated with substrate use and habitat. Each species was assigned a Habitat/substrate group based on the substrate their claws interact with in their …
The Dry Season Shuffle: Gorges Provide Refugia For Animal Communities In Tropical Savannah Ecosystems, J. Sean Doody, Simon Clulow, Geoff Kay, Domenic D'Amore, David Rhind
The Dry Season Shuffle: Gorges Provide Refugia For Animal Communities In Tropical Savannah Ecosystems, J. Sean Doody, Simon Clulow, Geoff Kay, Domenic D'Amore, David Rhind
USF St. Petersburg campus Faculty Publications
In the wet-dry tropics, animal species face the major challenges of acquiring food, water or shelter during an extended dry season. Although large and conspicuous animals such as ungulates and waterfowl migrate to wetter areas during this time, little is known of how smaller and more cryptic animal species with less mobility meet these challenges. We fenced off the entire entrance of a gorge in the Australian tropical savanna, offering the unique opportunity to determine the composition and seasonal movement patterns of the small vertebrate community. The 1.7 km-long fence was converted to a trapline that was deployed for 18-21 …
Sapl Annual Meeting 2012 : Dalliance With Dali's Ants, Deby L. Cassill, Nelson Poynter Memorial Library.
Sapl Annual Meeting 2012 : Dalliance With Dali's Ants, Deby L. Cassill, Nelson Poynter Memorial Library.
USF St. Petersburg campus Faculty Publications
Speakers: Peter Tush, Curator of Education, Salvador Dali Museum; Deby Cassil, Ph.D. Associate Professor, USFSP.
University Of South Florida St. Petersburg Student Research Journal, Vol. 1, Issue 1, Article 5 : Geometric Probability Of Mating Success For The Greater Short-Nosed Fruit Bat, Cynopterus Sphinx, Krista Ford, Leon Hardy, Deby L. Cassill
University Of South Florida St. Petersburg Student Research Journal, Vol. 1, Issue 1, Article 5 : Geometric Probability Of Mating Success For The Greater Short-Nosed Fruit Bat, Cynopterus Sphinx, Krista Ford, Leon Hardy, Deby L. Cassill
USF St. Petersburg campus Faculty Publications
In the bat Cynopterus sphinx, the random probability of mating success was calculated to be 4%. A combination of several adaptations dramatically increases their mating success to nearly 100%. First, the male and female hang upside down in a front-to-back mount. From behind, the male positions his penis dorsoventral toward the female's genitalia. The male maintains a tight hold on the female by biting the scruff on her neck and by holding her wings with his thumbs, allowing the pair to move forwards and backwards uninterruptedly and rhythmically. The male inserts the glans of his penis while the female bends …
University Of South Florida St. Petersburg Student Research Journal, Vol. 1, Issue 1, Article 3 : Modeling A Molecular Dynamic Simulation Of The Stat3 Monomer, Jessica Ruekberg, Demetrios Kiriopoulos, Kevin Moore, Deby L. Cassill, Leon Hardy
University Of South Florida St. Petersburg Student Research Journal, Vol. 1, Issue 1, Article 3 : Modeling A Molecular Dynamic Simulation Of The Stat3 Monomer, Jessica Ruekberg, Demetrios Kiriopoulos, Kevin Moore, Deby L. Cassill, Leon Hardy
USF St. Petersburg campus Faculty Publications
STAT3, also known as signal transducer and activator of transcription 3, is a DNA transcription enzyme. In mammals including humans, STAT3 regulates the expression of a variety of genes that play a role in embryonic development. Specifically, STAT3 regulates cell division, cell differentiation and cell death (apoptosis). During embryonic development, STAT3 proteins are phosphorylated in a cell's cytoplasm in response to chemical growth factors. Once phosphorylated, STAT3 proteins pair up to form homodimers that act like pliers. STAT3 homodimers are transferred into the cell nucleus, where they bind to DNA to regulate embryonic development. When mutations of the STAT3 gene …
Conceptual Model For Thermal Limits On The Distribution Of Reptiles, J. Sean Doody, Jennifer A. Moore
Conceptual Model For Thermal Limits On The Distribution Of Reptiles, J. Sean Doody, Jennifer A. Moore
USF St. Petersburg campus Faculty Publications
Recent climate change has re-invigorated scientific interest in the dynamics of geographic distributions of organisms. Climate responses and their biogeographical ramifications can be predicted indirectly by studying variation in fitness-related traits across environmental gradients in wide-ranging species. We review evidence for such variation in reptiles. Clinal variation in seasonal timing (onset) of nesting is common but may offer only minor compensation. In contrast, clinal variation in nesting behavior in two wide-ranging species suggests that reptiles can use nest site choice to counter climate differences. We suggest that when range boundaries located at climate extremes are determined by thermal conditions of …
Survival Of The Misfits : Why Most Sperm Are Duds & Other Interesting Tales Of Evolution, Deby L. Cassill, Nelson Poynter Memorial Library.
Survival Of The Misfits : Why Most Sperm Are Duds & Other Interesting Tales Of Evolution, Deby L. Cassill, Nelson Poynter Memorial Library.
USF St. Petersburg campus Faculty Publications
Speaker: Dr. Deby Cassill