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Full-Text Articles in Life Sciences

Novel Species-Specific Glycoprotein On The Surface Of Mytilus Edulis And M. Trossulus Eggs, Fiona M. Harper, Kasandra J. Riley, R. D. Rawson Aug 2017

Novel Species-Specific Glycoprotein On The Surface Of Mytilus Edulis And M. Trossulus Eggs, Fiona M. Harper, Kasandra J. Riley, R. D. Rawson

Faculty Publications

Protein–protein interactions play a central role in the gamete attraction, binding, and fusion stages of gamete interactions and fertilization for broadcast spawning species, such as marine mussels in the Mytilus edulis species complex. Although assortative gamete interaction has been implicated in the level of reproductive isolation among the three species in this complex, the molecular basis of these interactions has not been elucidated. Using mass spectrometry peptide sequencing, cDNA sequencing, and bioinformatics approaches, we have investigated species-level variation in the proteins expressed on the surface of mussel eggs. We herein describe an extracellular protein, MESP-1, from the surface of the …


Egg Quality Traits And Predictors Of Embryo And Fry Viability In Red Snapper Lutjanus Campechanus, Agnés Bardon-Albaret, Eric Saillant Aug 2017

Egg Quality Traits And Predictors Of Embryo And Fry Viability In Red Snapper Lutjanus Campechanus, Agnés Bardon-Albaret, Eric Saillant

Faculty Publications

The quality of red snapper eggs is highly variable and unpredictable in aquaculture, leading to high mortality during early larval rearing. In this work, the viability of red snapper eggs was monitored from fertilization until unfed larvae expired because of exhaustion of vitelline reserves to determine egg quality traits in this species. The spawns were obtained via strip spawning wild-caught females following hormonal induction with chorionic gonadotropin. Females were induced immediately after capture (wild group, n = 17) or held captive for the entire maturation period prior to induction (captive group, n = 7). Candidate predictors of egg quality measured …


Oviposition Preference And Offspring Performance In Container Breeding Mosquitoes: Evaluating The Effects Of Organic Compounds And Laboratory Colonisation, David W. Allgood, Donald A. Yee Aug 2017

Oviposition Preference And Offspring Performance In Container Breeding Mosquitoes: Evaluating The Effects Of Organic Compounds And Laboratory Colonisation, David W. Allgood, Donald A. Yee

Faculty Publications

1. The preference–performance hypothesis (PPH) predicts that organisms lacking parental care should oviposit in habitats that optimise offspring performance. Preference–performance relationships were investigated for the Asian tiger mosquito (Aedes albopictus Skuse) and the southern house mosquito (Culex quinquefasciatus Say) (Diptera: Culicidae), two medically important container-breeding species, in response to an organic chemical blend mimicking decaying plant matter. Additionally, the effects of long-term laboratory colonisation of Cx. quinquefasciatus using wild and laboratory strains were evaluated.

2. Oviposition bioassays were conducted by releasing gravid mosquitoes into field enclosures with automobile tires containing low and high concentrations of the chemical blend, …


Catalase Is A Determinant Of The Colonization And Transovarial Transmission Of Rickettsia Parkeri In The Gulf Coast Tick Amblyomma Maculatum, Khemraj Budachetri, Deepak Kumar, Shahid Karim Aug 2017

Catalase Is A Determinant Of The Colonization And Transovarial Transmission Of Rickettsia Parkeri In The Gulf Coast Tick Amblyomma Maculatum, Khemraj Budachetri, Deepak Kumar, Shahid Karim

Faculty Publications

The Gulf Coast tick (Amblyomma maculatum) has evolved as a competent vector of the spotted‐fever group rickettsia, Rickettsia parkeri. In this study, the functional role of catalase, an enzyme responsible for the degradation of toxic hydrogen peroxide, in the colonization of the tick vector by R. parkeri and transovarial transmission of this pathogen to the next tick generation, was investigated. Catalase gene (CAT) expression in midgut, salivary glands and ovarian tissues exhibited a 2–11‐fold increase in transcription level upon R. parkeri infection. Depletion of CAT transcripts using an RNA‐interference approach significantly reduced R. parkeri infection …


Complete Genome Sequence Of Vibrio Gazogenes Atcc 43942, Phani M. Gummadidala, Michael E. Holder, Jacqueline L. O’Brien, Nadim J. Ajami, Joseph F. Petrosino, Chandrani Mitra, Yung Pin Chen, Alan W. Decho, Anindya Chandaa Jul 2017

Complete Genome Sequence Of Vibrio Gazogenes Atcc 43942, Phani M. Gummadidala, Michael E. Holder, Jacqueline L. O’Brien, Nadim J. Ajami, Joseph F. Petrosino, Chandrani Mitra, Yung Pin Chen, Alan W. Decho, Anindya Chandaa

Faculty Publications

Vibrio gazogenes ATCC 43942 has the potential to synthesize a plethora of metabolites which are of clinical and agricultural significance in response to environmental triggers. The complete genomic sequence of Vibrio gazogenes ATCC 43942 is reported herein, contributing to the knowledge base of strains in the Vibrio genus.


Understanding Differences Between Summer Vs. School Obesogenic Behaviors Of Children: The Structured Days Hypothesis, Keith Brazendale, Michael W. Beets, R. Glenn Weaver, Russell R. Pate, Gabrielle Turner-Mcgrievy, Andrew T. Kaczynski, Jessica L. Chandler, Amy Bohnert, Paul T. Von Hippel Jul 2017

Understanding Differences Between Summer Vs. School Obesogenic Behaviors Of Children: The Structured Days Hypothesis, Keith Brazendale, Michael W. Beets, R. Glenn Weaver, Russell R. Pate, Gabrielle Turner-Mcgrievy, Andrew T. Kaczynski, Jessica L. Chandler, Amy Bohnert, Paul T. Von Hippel

Faculty Publications

Background: Although the scientific community has acknowledged modest improvements can be made to weight status and obesogenic behaviors (i.e., physical activity, sedentary/screen time, diet, and sleep) during the school year, studies suggests improvements are erased as elementary-age children are released to summer vacation. Emerging evidence shows children return to school after summer vacation displaying accelerated weight gain compared to the weight gained occurring during the school year. Understanding how summer days differ from when children are in school is, therefore, essential.

Discussion: There is limited evidence on the etiology of accelerated weight gain during summer, with few studies comparing obesogenic …


Draft Genome Sequences Of Strains Salinicola Socius Smb35T, Salinicola Sp. Mh3r3-1 And Chromohalobacter Sp. Smb17 From The Verkhnekamsk Potash Mining Region Of Russia, Björn E. Olsson, Ekaterina S. Korsakova, Lyudmila N. Anan'ina, Anna A. Pyankova, Olga V. Mavrodi, Elena G. Plotnikova, Dmitri V. Mavrodi Jul 2017

Draft Genome Sequences Of Strains Salinicola Socius Smb35T, Salinicola Sp. Mh3r3-1 And Chromohalobacter Sp. Smb17 From The Verkhnekamsk Potash Mining Region Of Russia, Björn E. Olsson, Ekaterina S. Korsakova, Lyudmila N. Anan'ina, Anna A. Pyankova, Olga V. Mavrodi, Elena G. Plotnikova, Dmitri V. Mavrodi

Faculty Publications

Halomonads are moderately halophilic bacteria that are studied as models of prokaryotic osmoadaptation and sources of enzymes and chemicals for biotechnological applications. Despite the progress in understanding the diversity of these organisms, our ability to explain ecological, metabolic, and biochemical traits of halomonads at the genomic sequence level remains limited. This study addresses this gap by presenting draft genomes of Salinicola socius SMB35T, Salinicola sp. MH3R3–1 and Chromohalobacter sp. SMB17, which were isolated from potash mine tailings in the Verkhnekamsk salt deposit area of Russia. The analysis of these genomes confirmed the importance of ectoines and quaternary amines to the …


Deep Long Short-Term Memory Structures Model Temporal Dependencies Improving Cognitive Workload Estimation, Ryan G. Hefron, Brett J. Borghetti, James C. Christensen, Christine M. Schubert Kabban Jul 2017

Deep Long Short-Term Memory Structures Model Temporal Dependencies Improving Cognitive Workload Estimation, Ryan G. Hefron, Brett J. Borghetti, James C. Christensen, Christine M. Schubert Kabban

Faculty Publications

Using deeply recurrent neural networks to account for temporal dependence in electroencephalograph (EEG)-based workload estimation is shown to considerably improve day-to-day feature stationarity resulting in significantly higher accuracy (p < .0001) than classifiers which do not consider the temporal dependence encoded within the EEG time-series signal. This improvement is demonstrated by training several deep Recurrent Neural Network (RNN) models including Long Short-Term Memory (LSTM) architectures, a feedforward Artificial Neural Network (ANN), and Support Vector Machine (SVM) models on data from six participants who each perform several Multi-Attribute Task Battery (MATB) sessions on five separate days spread out over a month-long period. Each participant-specific classifier is trained on the first four days of data and tested using the fifth’s. Average classification accuracy of 93.0% is achieved using a deep LSTM architecture. These results represent a 59% decrease in error compared to the best previously published results for this dataset. This study additionally evaluates the significance of new features: all combinations of mean, variance, skewness, and kurtosis of EEG frequency-domain power distributions. Mean and variance are statistically significant features, while skewness and kurtosis are not. The overall performance of this approach is high enough to warrant evaluation for inclusion in operational systems.


Osteopontin Facilitates West Nile Nirus Neuroinvasion Via Neutrophil "Trojan Horse" Transport, Amber M. Paul, Dhiraj Acharya, Laurel Duty, E. Ashley Thompson, Linda Le, Dobrivoje S. Stokic, A. Arturo Leis, Fengwei Bai Jul 2017

Osteopontin Facilitates West Nile Nirus Neuroinvasion Via Neutrophil "Trojan Horse" Transport, Amber M. Paul, Dhiraj Acharya, Laurel Duty, E. Ashley Thompson, Linda Le, Dobrivoje S. Stokic, A. Arturo Leis, Fengwei Bai

Faculty Publications

West Nile virus (WNV) can cause severe human neurological diseases including encephalitis and meningitis. The mechanisms by which WNV enters the central nervous system (CNS) and host-factors that are involved in WNV neuroinvasion are not completely understood. The proinflammatory chemokine osteopontin (OPN) is induced in multiple neuroinflammatory diseases and is responsible for leukocyte recruitment to sites of its expression. In this study, we found that WNV infection induced OPN expression in both human and mouse cells. Interestingly, WNV-infected OPN deficient (Opn −/−) mice exhibited a higher survival rate (70%) than wild type (WT) control mice (30%), suggesting OPN plays a …


Normal Behavioral Responses To Light And Darkness And The Pupillary Light Reflex Are Dependent Upon The Olivary Pretectal Nucleus In The Diurnal Nile Grass Rat, Andrew J. Gall, Ohanes S. Khacherian, Brandi Ledbetter, Sean P. Deats, Megan Luck, Laura Smale, Lily Yan, Antonio A. Nunez Jul 2017

Normal Behavioral Responses To Light And Darkness And The Pupillary Light Reflex Are Dependent Upon The Olivary Pretectal Nucleus In The Diurnal Nile Grass Rat, Andrew J. Gall, Ohanes S. Khacherian, Brandi Ledbetter, Sean P. Deats, Megan Luck, Laura Smale, Lily Yan, Antonio A. Nunez

Faculty Publications

The olivary pretectal nucleus (OPT) is a midbrain structure that receives reciprocal bilateral retinal projections, is involved in the pupillary light reflex, and connects reciprocally with the intergeniculate leaflet (IGL), a retinorecipient brain region that mediates behavioral responses to light pulses (i.e., masking) in diurnal Nile grass rats. Here, we lesioned the OPT and evaluated behavioral responses in grass rats to various lighting conditions, as well as their anxiety-like responses to light exposure. While control grass rats remained diurnal, grass rats with OPT lesions exhibited a more night-active pattern under 12h:12h light-dark (LD) conditions. However, when placed in constant darkness, …


Comparing Salinities Of 10, 20, And 30% In Intensive, Commercial-Scale Biofloc Shrimp (Litopenaeus Vannamei) Production Systems, Andrew J. Ray, Jeffrey M. Lotz Jul 2017

Comparing Salinities Of 10, 20, And 30% In Intensive, Commercial-Scale Biofloc Shrimp (Litopenaeus Vannamei) Production Systems, Andrew J. Ray, Jeffrey M. Lotz

Faculty Publications

Minimal-exchange, intensive biofloc aquaculture systems offer a viable means of culturing marine animals at inland locations due to very low rates of water use. Fresh, never-frozen shrimp can be provided to metropolitan markets; however, the cost of artificial salt can be substantial. The purpose of this project was to examine commercial-scale biofloc shrimp production at three different salinities. Nine raceways were randomly assigned to three salinity treatments: 10, 20, and 30‰ (LS, MS, and HS), each treatment contained three raceways operated at 50 m3. The raceways were operated as heterotrophic biofloc systems, with daily additions of sucrose to …


Zebrafish Models In Neuropsychopharmacology And Cns Drug Discovery, Kanza M. Khan, Adam D. Collier, Darya A. Meshalkina, Elana V. Kysil, Sergey L. Khatsko, Tatyana Kolesnikova, Yury Yu Morzherin, Jason E. Warnick, Allan V. Kalueff, David Echevarria Jul 2017

Zebrafish Models In Neuropsychopharmacology And Cns Drug Discovery, Kanza M. Khan, Adam D. Collier, Darya A. Meshalkina, Elana V. Kysil, Sergey L. Khatsko, Tatyana Kolesnikova, Yury Yu Morzherin, Jason E. Warnick, Allan V. Kalueff, David Echevarria

Faculty Publications

Despite the high prevalence of neuropsychiatric disorders, their aetiology and molecular mechanisms remain poorly understood. The zebrafish (Danio rerio) is increasingly utilized as a powerful animal model in neuropharmacology research and in vivo drug screening. Collectively, this makes zebrafish a useful tool for drug discovery and the identification of disordered molecular pathways. Here, we discuss zebrafish models of selected human neuropsychiatric disorders and drug-induced phenotypes. As well as covering a broad range of brain disorders (from anxiety and psychoses to neurodegeneration), we also summarize recent developments in zebrafish genetics and small molecule screening, which markedly enhance the disease modelling and …


Comparing The Ecological Stoichiometry In Green And Brown Food Webs: A Review And Meta-Analysis Of Freshwater Food Webs, Michelle A. Evans-White, Halvor M. Halvorson Jun 2017

Comparing The Ecological Stoichiometry In Green And Brown Food Webs: A Review And Meta-Analysis Of Freshwater Food Webs, Michelle A. Evans-White, Halvor M. Halvorson

Faculty Publications

The framework of ecological stoichiometry was developed primarily within the context of “green” autotroph-based food webs. While stoichiometric principles also apply in “brown” detritus-based systems, these systems have been historically understudied and differ from green ones in several important aspects including carbon (C) quality and the nutrient [nitrogen (N) and phosphorus (P)] contents of food resources for consumers. In this paper, we review work over the last decade that has advanced the application of ecological stoichiometry from green to brown food webs, focusing on freshwater ecosystems. We first review three focal areas where green and brown food webs differ: (1) …


A Study Of Ticks And Tick-Borne Livestock Pathogens In Pakistan, Shahid Karim, Khemraj Budachetri, Nabanita Mukherjee, Jaclyn Williams, Asma Kausar, Muhammad Jawadul Hassan, Steven W. Adamson, Scot E. Dowd, Dmitry Apanskevich, Abdullah Arijo, Zia Uddin Sindhu, Muhammad Azam Kakar, Raja Muhammad Dilpazir Khan, Shafiq Ullah, Muhammad Sohail Sajid, Abid Ali, Zafar Iqbal Jun 2017

A Study Of Ticks And Tick-Borne Livestock Pathogens In Pakistan, Shahid Karim, Khemraj Budachetri, Nabanita Mukherjee, Jaclyn Williams, Asma Kausar, Muhammad Jawadul Hassan, Steven W. Adamson, Scot E. Dowd, Dmitry Apanskevich, Abdullah Arijo, Zia Uddin Sindhu, Muhammad Azam Kakar, Raja Muhammad Dilpazir Khan, Shafiq Ullah, Muhammad Sohail Sajid, Abid Ali, Zafar Iqbal

Faculty Publications

Background

As obligate blood-feeding arthropods, ticks transmit pathogens to humans and domestic animals more often than other arthropod vectors. Livestock farming plays a vital role in the rural economy of Pakistan, and tick infestation causes serious problems with it. However, research on tick species diversity and tick-borne pathogens has rarely been conducted in Pakistan. In this study, a systematic investigation of the tick species infesting livestock in different ecological regions of Pakistan was conducted to determine the microbiome and pathobiome diversity in the indigenous ticks.

Methodology/Principal findings A total of 3,866 tick specimens were morphologically identified as 19 different tick …


International Society Of Sports Nutrition Position Stand: Protein And Exercise, Ralf Jäger, Chad M. Kerksick, Bill I. Campbell, Paul J. Cribb, Shawn D. Wells, Tim M. Skwiat, Martin Purpura, Tim N. Ziegenfuss, Arny A. Ferrando, Shawn M. Arent, Abbie E. Smith-Ryan, Jeffrey R. Stout, Paul J. Arciero, Michael J. Ormsbee, Lem W. Taylor, Colin D. Wilborn, Doug S. Kalman, Richard B. Kreider, Darryn S. Willoughby, Jay R. Hoffman, Jamie L. Krzykowski, Jose Antonio Jun 2017

International Society Of Sports Nutrition Position Stand: Protein And Exercise, Ralf Jäger, Chad M. Kerksick, Bill I. Campbell, Paul J. Cribb, Shawn D. Wells, Tim M. Skwiat, Martin Purpura, Tim N. Ziegenfuss, Arny A. Ferrando, Shawn M. Arent, Abbie E. Smith-Ryan, Jeffrey R. Stout, Paul J. Arciero, Michael J. Ormsbee, Lem W. Taylor, Colin D. Wilborn, Doug S. Kalman, Richard B. Kreider, Darryn S. Willoughby, Jay R. Hoffman, Jamie L. Krzykowski, Jose Antonio

Faculty Publications

Position statement: The International Society of Sports Nutrition (ISSN) provides an objective and critical review related to the intake of protein for healthy, exercising individuals. Based on the current available literature, the position of the Society is as follows:

1) An acute exercise stimulus, particularly resistance exercise, and protein ingestion both stimulate muscle protein synthesis (MPS) and are synergistic when protein consumption occurs before or after resistance exercise.

2) For building muscle mass and for maintaining muscle mass through a positive muscle protein balance, an overall daily protein intake in the range of 1.4–2.0 g protein/kg body weight/day (g/kg/d) is …


International Society Of Sports Nutrition Position Stand: Diets And Body Composition, Alan A. Aragon, Brad J. Schoenfeld, Robert Wildman, Susan Kleiner, Trisha Vandusseldorp, Lem Taylor, Conrad P. Earnest, Paul J. Arciero, Colin Wilborn, Douglas S. Kalman, Jeffrey R. Stout, Darryn S. Willoughby, Bill Campbell, Shawn M. Arent, Laurent Bannock, Abbie E. Smith-Ryan, Jose Antonio Jun 2017

International Society Of Sports Nutrition Position Stand: Diets And Body Composition, Alan A. Aragon, Brad J. Schoenfeld, Robert Wildman, Susan Kleiner, Trisha Vandusseldorp, Lem Taylor, Conrad P. Earnest, Paul J. Arciero, Colin Wilborn, Douglas S. Kalman, Jeffrey R. Stout, Darryn S. Willoughby, Bill Campbell, Shawn M. Arent, Laurent Bannock, Abbie E. Smith-Ryan, Jose Antonio

Faculty Publications

Position Statement: The International Society of Sports Nutrition (ISSN) bases the following position stand on a critical analysis of the literature regarding the effects of diet types (macronutrient composition; eating styles) and their influence on body composition. The ISSN has concluded the following. 1) There is a multitude of diet types and eating styles, whereby numerous subtypes fall under each major dietary archetype. 2) All body composition assessment methods have strengths and limitations. 3) Diets primarily focused on fat loss are driven by a sustained caloric deficit. The higher the baseline body fat level, the more aggressively the caloric deficit …


Interaction Between Predation Environment And Diet Constrains Body Shape In Utah Chub, Gila Atraria (Cypriniformes: Cyprinidae), Trevor J. Williams, Jerald B. Johnson, Mark C. Belk Jun 2017

Interaction Between Predation Environment And Diet Constrains Body Shape In Utah Chub, Gila Atraria (Cypriniformes: Cyprinidae), Trevor J. Williams, Jerald B. Johnson, Mark C. Belk

Faculty Publications

Evolution typically occurs in response to a suite of selective pressures. Yet, many studies of natural selection in the wild only investigate a single selective agent at a time. This can be problematic when selective agents act in non-additive ways. Here we evaluate the interactive effects of diet and predation on the evolution of body shape in the cyprinid fish Utah chub (Gila atraria). We found that both factors and the interaction between them are significant predictors of body shape. This interaction is likely a result of different forms of selective pressures, where predation is a stabilizing selective …


Weather And Children’S Physical Activity; How And Why Do Relationships Vary Between Countries?, Flo Harrison, Anna Goodman, Ester M.F. Van Sluijs, Lars Bo Carson, Greet Cardon, Rachel Davey, Kathleen F. Janz, Susi Kriemler, Lynn Molly, Angie S. Page, Russell R. Pate, Jardena J. Puder, Luis B. Sardinha, Anna Timperio, Niels Wedderkopp, Andy P. Jones May 2017

Weather And Children’S Physical Activity; How And Why Do Relationships Vary Between Countries?, Flo Harrison, Anna Goodman, Ester M.F. Van Sluijs, Lars Bo Carson, Greet Cardon, Rachel Davey, Kathleen F. Janz, Susi Kriemler, Lynn Molly, Angie S. Page, Russell R. Pate, Jardena J. Puder, Luis B. Sardinha, Anna Timperio, Niels Wedderkopp, Andy P. Jones

Faculty Publications

Background

Globally most children do not engage in enough physical activity. Day length and weather conditions have been identified as determinants of physical activity, although how they may be overcome as barriers is not clear. We aim to examine if and how relationships between children’s physical activity and weather and day length vary between countries and identify settings in which children were better able to maintain activity levels given the weather conditions they experienced.

Methods

In this repeated measures study, we used data from 23,451 participants in the International Children’s Accelerometry Database (ICAD). Daily accelerometer-measured physical activity (counts per minute; …


Microbial Extracellular Polymeric Substances (Epss) In Ocean Systems, Alan W. Decho, Tony Gutierrez May 2017

Microbial Extracellular Polymeric Substances (Epss) In Ocean Systems, Alan W. Decho, Tony Gutierrez

Faculty Publications

Microbial cells (i.e., bacteria, archaea, microeukaryotes) in oceans secrete a diverse array of large molecules, collectively called extracellular polymeric substances (EPSs) or simply exopolymers. These secretions facilitate attachment to surfaces that lead to the formation of structured ‘biofilm’ communities. In open-water environments, they also lead to formation of organic colloids, and larger aggregations of cells, called ‘marine snow.’ Secretion of EPS is now recognized as a fundamental microbial adaptation, occurring under many environmental conditions, and one that influences many ocean processes. This relatively recent realization has revolutionized our understanding of microbial impacts on ocean systems. EPS occur in a range …


Rapid Reversible Borane To Boryl Hydride Exchange By Metal Shuttling On The Carborane Cluster Surface, Bennett J. Eleazer, Mark D. Smith, Alexey A. Popov, Dmitry V. Peryshkov May 2017

Rapid Reversible Borane To Boryl Hydride Exchange By Metal Shuttling On The Carborane Cluster Surface, Bennett J. Eleazer, Mark D. Smith, Alexey A. Popov, Dmitry V. Peryshkov

Faculty Publications

In this work, we introduce a novel concept of a borane group vicinal to a metal boryl bond acting as a supporting hemilabile ligand in exohedrally metalated three-dimensional carborane clusters. The (POBOP)Ru(Cl)(PPh3) pincer complex (POBOP ¼ 1,7-OP(i-Pr)2-m-2-carboranyl) features extreme distortion of the two-center-two-electron Ru–B bond due to the presence of a strong three-centertwo-electron B–H/Ru vicinal interaction. Replacement of the chloride ligand with a hydride afforded the (POBOP)Ru(H)(PPh3) pincer complex, which possesses B–Ru, B–H/Ru, and Ru–H bonds. This complex was found to exhibit a rapid exchange between hydrogen atoms of the borane and the terminal hydride through metal center shuttling between …


Predicting Cryptic Links In Host-Parasite Networks, Tad Dallas, Andrew W. Park, John M. Drake May 2017

Predicting Cryptic Links In Host-Parasite Networks, Tad Dallas, Andrew W. Park, John M. Drake

Faculty Publications

Networks are a way to represent interactions among one (e.g., social networks) or more (e.g., plant-pollinator networks) classes of nodes. The ability to predict likely, but unobserved, interactions has generated a great deal of interest, and is sometimes referred to as the link prediction problem. However, most studies of link prediction have focused on social networks, and have assumed a completely censused network. In biological networks, it is unlikely that all interactions are censused, and ignoring incomplete detection of interactions may lead to biased or incorrect conclusions. Previous attempts to predict network interactions have relied on known properties of network …


Strong Linkages Between Surface And Deep-Water Dissolved Organic Matter In The East/Japan Sea, Tae-Hoon Kim, Guebuem Kim, Yuan Shen, Ronald Benner May 2017

Strong Linkages Between Surface And Deep-Water Dissolved Organic Matter In The East/Japan Sea, Tae-Hoon Kim, Guebuem Kim, Yuan Shen, Ronald Benner

Faculty Publications

Vertical and horizontal distributions of total dissolved amino acids (TDAAs), dissolved organic carbon (DOC), and dissolved organic nitrogen (DON) were measured in the East/Japan Sea (EJS). The euphotic zone of this sea is N-limited, and the N : P ratio is ∼ 13 below 200 m depth. Elevated TDAA concentrations (137 ± 34 nM) and DOC-normalized yields (0.8 ± 0.2 % of DOC) were observed in deep waters ( ≥  1000 m) of the EJS and compared with those in the deep North Pacific Ocean. Significantly high TDAA concentrations and yields were observed in a region of deep-water formation, indicating …


Reproductive Dynamics Of Gulf Menhaden (Brevoortia Patronus) In The Northern Gulf Of Mexico: Effects On Stock Assessments, Nancy J. Brown-Peterson, Robert T. Leaf, Amy M. Schueller, Michael J. Andres May 2017

Reproductive Dynamics Of Gulf Menhaden (Brevoortia Patronus) In The Northern Gulf Of Mexico: Effects On Stock Assessments, Nancy J. Brown-Peterson, Robert T. Leaf, Amy M. Schueller, Michael J. Andres

Faculty Publications

Gulf menhaden (Brevoortia patronus) produce one of the largest U.S. fisheries, yet information on reproductive dynamics of the stock is sparse. Males and females reach 50% maturity at 140.8 and 137.2 mm fork length, respectively and recruit into the commercial fishery at this size. Analysis of fishery-dependent data from 1964 through 2014 indicated that somatic condition was lower during the late 1980s and late 2000s and that reproductively active fish from 2014 were significantly larger and had greater gonadosomatic index values than those from 1964 through 1970. Histological analysis performed on fish from 2014 through 2016 revealed spawning-capable …


Genetic Bottlenecks In Pristis Sawfishes In Northern Australian Waters, Nicole M. Phillips, Annemarie Fearing, David L. Morgan May 2017

Genetic Bottlenecks In Pristis Sawfishes In Northern Australian Waters, Nicole M. Phillips, Annemarie Fearing, David L. Morgan

Faculty Publications

Northern Australia has been identified as the last stronghold for the dwarf sawfish Pristis clavata, green sawfish P. zijsron, and largetooth sawfish P. pristis, making these populations key in global conservation efforts for each species. This research assesses the levels of genetic diversity in these 3 sawfishes in Australian waters, testing for the presence of population bottlenecks using data at microsatellite loci. Levels of observed heterozygosity in each species from the west coast of Australia and the north-eastern Gulf of Carpentaria were generally high. M ratio tests suggest that assemblages of P. zijsron and P. pristis on …


Crude Oil Impairs Immune Function And Increases Susceptibility To Pathogenic Bacteria In Southern Flounder, Keith M. Bayha, Natalie Ortell, Caitlin Ryan, Kimberly J. Griffitt, Michelle Krasnec, Johnny Sena, Thiruvangan Ramaraj, Ryan Takeshita, Gregory D. Mayer, Faye Schilkey, Robert J. Griffitt May 2017

Crude Oil Impairs Immune Function And Increases Susceptibility To Pathogenic Bacteria In Southern Flounder, Keith M. Bayha, Natalie Ortell, Caitlin Ryan, Kimberly J. Griffitt, Michelle Krasnec, Johnny Sena, Thiruvangan Ramaraj, Ryan Takeshita, Gregory D. Mayer, Faye Schilkey, Robert J. Griffitt

Faculty Publications

Exposure to crude oil or its individual constituents can have detrimental impacts on fish species, including impairment of the immune response. Increased observations of skin lesions in northern Gulf of Mexico fish during the 2010 Deepwater Horizon oil spill indicated the possibility of oil-induced immunocompromisation resulting in bacterial or viral infection. This study used a full factorial design of oil exposure and bacterial challenge to examine how oil exposure impairs southern flounder (Paralichthys lethostigma) immune function and increases susceptibility to the bacteria Vibrio anguillarum, a causative agent of vibriosis. Fish exposed to oil prior to bacterial challenge …


Species Differences In Egocentric Navigation: The Effect Of Burrowing Ecology On A Spatial Cognitive Trait In Mice, Jason N. Bruck, Noah A. Allen, Kelsey E. Brass, Brian A. Horn, Polly Campbell May 2017

Species Differences In Egocentric Navigation: The Effect Of Burrowing Ecology On A Spatial Cognitive Trait In Mice, Jason N. Bruck, Noah A. Allen, Kelsey E. Brass, Brian A. Horn, Polly Campbell

Faculty Publications

© 2017 The Association for the Study of Animal Behaviour Efficient navigation is a critical component of fitness for most animals. While most species use a combination of allocentric (external) and egocentric (internal) cues to navigate through their environment, subterranean environments present a unique challenge in that visually mediated allocentric cues are unavailable. The relationship between egocentric spatial cognition and species differences in ecology is surprisingly understudied. We used a maze-learning task to test for differences in egocentric navigation between two closely related species of mice, the eastern house mouse, Mus musculus musculus, and the mound-building mouse, Mus spicilegus. The …


Tgf-Beta Triggers Rapid Fibrillogenesis Via A Novel T Beta Rii-Dependent Fibronectin-Trafficking Mechanism, Archana Varadaraj, Laura M. Jenkins, Priyanka Singh, Anindya Chanda, John Snider, N.Y. Lee, Ayelet R. Amsalem-Zafran, Marcelo Ehrlich, Yoav I. Henis, Karthikeyan Mythreye May 2017

Tgf-Beta Triggers Rapid Fibrillogenesis Via A Novel T Beta Rii-Dependent Fibronectin-Trafficking Mechanism, Archana Varadaraj, Laura M. Jenkins, Priyanka Singh, Anindya Chanda, John Snider, N.Y. Lee, Ayelet R. Amsalem-Zafran, Marcelo Ehrlich, Yoav I. Henis, Karthikeyan Mythreye

Faculty Publications

Fibronectin (FN) is a critical regulator of extracellular matrix (ECM) remodeling through its availability and stepwise polymerization for fibrillogenesis. Availability of FN is regulated by its synthesis and turnover, and fibrillogenesis is a multistep, integrin-dependent process essential for cell migration, proliferation, and tissue function. Transforming growth factor β (TGF-β) is an established regulator of ECM remodeling via transcriptional control of ECM proteins. Here we show that TGF-β, through increased FN trafficking in a transcription- and SMAD-independent manner, is a direct and rapid inducer of the fibrillogenesis required for TGF-β–induced cell migration. Whereas TGF-β signaling is dispensable for rapid fibrillogenesis, stable …


Activity Of Distinct Growth Factor Receptor Network Components In Breast Tumors Uncovers Two Biologically Relevant Subtypes, Mumtahena Rahman, Shelley M. Macneil, David F. Jenkins, Gajendra Shrestha, Sydney R. Wyatt, Jasmine A. Mcquerry, Stephen R. Piccolo, Laura M. Heiser, Joe W. Gray, W. Evan Johnson, Andrea H. Bild Apr 2017

Activity Of Distinct Growth Factor Receptor Network Components In Breast Tumors Uncovers Two Biologically Relevant Subtypes, Mumtahena Rahman, Shelley M. Macneil, David F. Jenkins, Gajendra Shrestha, Sydney R. Wyatt, Jasmine A. Mcquerry, Stephen R. Piccolo, Laura M. Heiser, Joe W. Gray, W. Evan Johnson, Andrea H. Bild

Faculty Publications

Background: The growth factor receptor network (GFRN) plays a significant role in driving key oncogenic processes. However, assessment of global GFRN activity is challenging due to complex crosstalk among GFRN components, or pathways, and the inability to study complex signaling networks in patient tumors. Here, pathway-specific genomic signatures were used to interrogate GFRN activity in breast tumors and the consequent phenotypic impact of GRFN activity patterns.

Methods: Novel pathway signatures were generated in human primary mammary epithelial cells by overexpressing key genes from GFRN pathways (HER2, IGF1R, AKT1, EGFR, KRAS (G12V), RAF1, BAD). The pathway analysis toolkit Adaptive Signature …


Time Lags Associated With Effects Of Oceanic Conditions On Seabird Breeding In The Salish Sea Region Of The Northern California Current System, Rashida S. Smith, Lynelle M. Weldon, James L. Hayward, Shandelle M. Henson Apr 2017

Time Lags Associated With Effects Of Oceanic Conditions On Seabird Breeding In The Salish Sea Region Of The Northern California Current System, Rashida S. Smith, Lynelle M. Weldon, James L. Hayward, Shandelle M. Henson

Faculty Publications

No abstract provided.


Rolling Circle Mutagenesis Of Gst-Mcherry To Understand Mutation, Gene Expression, And Regulation, Jessica Cole, Amanda Ferguson, Veronica A. Segarra, Susan Walsh Apr 2017

Rolling Circle Mutagenesis Of Gst-Mcherry To Understand Mutation, Gene Expression, And Regulation, Jessica Cole, Amanda Ferguson, Veronica A. Segarra, Susan Walsh

Faculty Publications

Undergraduates are often familiar with textbook examples of human mutations that affect coding regions and the subsequent disorders, but they may struggle with understanding the implications of mutations in the regulatory regions of genes. We have designed a laboratory sequence that will allow students to explore the effect random mutagenesis can have on protein function, expression, and ultimately phenotype. Students design and perform a safe and time-efficient random mutagenesis experiment using error-prone rolling circular amplification of a plasmid expressing the inducible fusion protein glutathione S-transferase (GST)-mCherry. Mutagenized and wild-type control plasmid DNA, respectively, are then purified and transformed into bacteria …