A5020617145- Reproductive biology and impacts on aquatic species
- Effects and risks of endocrine disrupting chemicals
- Fish Ecology and Management Studies
- Environmental Toxicology and Ecotoxicology
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Aquaculture Nutrition and Growth
- Marine and fisheries research
- Sperm and Testicular Function
- Estrogen and related hormone effects
- Pharmaceutical and Antibiotic Environmental Impacts
- Thyroid Disorders and Treatments
- Animal Behavior and Reproduction
- Toxic Organic Pollutants Impact
- Wildlife Ecology and Conservation
- Rocket and propulsion systems research
- Water Quality Monitoring Technologies
- Genetically Modified Organisms Research
- Marine Biology and Environmental Chemistry
- Physiological and biochemical adaptations
- Spacecraft and Cryogenic Technologies
- Spacecraft Design and Technology
- High Altitude and Hypoxia
- Carcinogens and Genotoxicity Assessment
- Zebrafish Biomedical Research Applications
- Urban Green Space and Health
University of Houston
2014-2024
The University of Texas Health Science Center at Houston
2006-2011
Southeastern Louisiana University
2001-2009
Hokkaido University
2005
Duke University
1997-2000
University of South Carolina Beaufort
1998-2000
Research Triangle Park Foundation
1999
Environmental Protection Agency
1999
Tulane University
1999
Duke Medical Center
1997
Organochlorine compounds, particularly polychlorinated biphenyls (PCBs), alter serum thyroid hormone levels in humans. Hydroxylated organochlorines have relatively high affinities for the transport protein transthyretin, but ability of these compounds to interact with human receptor is unknown. Using a baculovirus expression system insect cells (Sf9 cells), we produced recombinant ss (hTRss). In competitive binding experiments, had expected relative affinity hormones and their analogs....
Several consensus definitions of the term endocrine disruptor have appeared recently, but all include important, though frequently implicit, stipulation that animal is not distressed or in obvious discomfort. Instead, a superficially healthy experiencing alterations hormone synthesis, transport, receptor interaction, metabolism, excretion, feedback regulation. In addition, disruption may occur during sex differentiation, and its effects be manifested until after sexual maturation. Many cases...
SUMMARY The goal of the current study was to generate a comprehensive, multi-tissue perspective effects chronic hypoxic exposure on carbohydrate metabolism in Gulf killifish Fundulus grandis. Fish were held at approximately 1.3 mg l-1 dissolved oxygen (∼3.6 kPa) for 4 weeks, after which maximal activities measured all glycolytic enzymes four tissues (white skeletal muscle, liver, heart and brain), as well glycogen (in muscle liver) gluconeogenesis(in liver). specific glycolysis strongly...
Vitellogenin (VTG) synthesis in male oviparous vertebrates is used as an indicator of environmental estrogen exposure, but the relationship between elevated VTG levels and effects estrogens on reproductive success are poorly understood. To examine whether altered expression predicts impairment, we exposed medaka (Oryzias latipes) for 2 or 8 weeks posthatch to 0, 0.5, 1.0, 2.5, 7.5 ppb o,p'-DDT. Fish were sampled 2, 4, after hatch gonad development. After fish transferred clean water, grown...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 392:211-221 (2009) - DOI: https://doi.org/10.3354/meps08182 Diel hypoxia in marsh creeks impairs reproductive capacity of estuarine fish populations Ann O. Cheek1,3,5,*, Christie A. Landry1,4, Stacy L. Steele1, Steve Manning2 1Department Biological Sciences, Southeastern Louisiana University, Hammond, 70402,...
While there is increasing recognition that social processes in cities like gentrification have ecological consequences, we lack nuanced understanding of the ways affects urban biodiversity. We analyzed a large camera trap dataset mammals (>500 g) to evaluate how impacts species richness and community composition across 23 US cities. After controlling for negative effect impervious cover, gentrified parts had highest mammal richness. Change was associated with few cities, which were mostly...
Worldwide, wild fish living in rivers receiving municipal and industrial discharges may experience endocrine disruption as a result of exposure to anthropogenic pollutants. The purpose this study was evaluate the hormonal status U.S. river unbleached kraft recycled pulp mill effluent (Pearl River at Bogalusa, LA). We evaluated two alternative hypotheses: contained constituents that suppressed male female reproduction, or it an androgenic substance masculinized females. To likelihood...
How important is endocrine disruption as a threat to wildlife populations? This review applies causal criteria existing studies of wild populations fish, amphibians, reptiles, birds, and mammals answer three questions: (1) Have endocrine-mediated effects contaminant exposure been documented? (2) individual adverse that could lead population (3) level In the possibility inferred from impaired fertility. Substantial evidence directly links fertility impairment disruption. declines are...
Organochlorine compounds, particularly polychlorinated biphenyls (PCBs), alter serum thyroid hormone levels in humans. Hydroxylated organochlorines have relatively high affinities for the transport protein transthyretin, but ability of these compounds to interact with human receptor is unknown. Using a baculovirus expression system insect cells (Sf9 cells), we produced recombinant ss (hTRss). In competitive binding experiments, had expected relative affinity hormones and their analogs....
Endogenous and exogenous chemical signals have evolved as a means for organisms to respond physical or biological stimuli in the environment. Sensitivity these can make vulnerable inadvertent from xenobiotics. In this review we discuss how various chemicals interact with steroid-like signaling pathways, especially estrogen. Numerous compounds estrogenic activity, including steroids, phytoestrogens, synthetic chemicals. We compare bioavailability, metabolism, interaction receptors,...
The U.S. Congress has passed legislation requiring the EPA to implement screening tests for identifying endocrine-disrupting chemicals. A series of workshops was sponsored by EPA, Chemical Manufacturers Association, and World Wildlife Fund; one workshop focused on screens chemicals that alter thyroid hormone function homeostasis. Participants at this meeting identified examined methods detect alterations in synthesis, transport, catabolism. In addition, some bind receptors acting as either...
Vitellogenin (VTG) synthesis in male oviparous vertebrates is used as an indicator of environmental estrogen exposure, but the relationship between elevated VTG levels and effects estrogens on reproductive success are poorly understood. To examine whether altered expression predicts impairment, we exposed medaka (Oryzias latipes) for 2 or 8 weeks posthatch to 0, 0.5, 1.0, 2.5, 7.5 ppb o,p'-DDT. Fish were sampled 2, 4, after hatch gonad development. After fish transferred clean water, grown...