Download or read book A Reconnaissance of the Intersex Condition in Micropterus Dolomieu of the Upper Ohio River Basin as an Indicator of Anthropogenic Endocrine Disruptors written by Christopher Charles Barry and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Occurrence of Intersex in Fishes from the Delaware and Susquehanna River Basins written by Raffaela Marano and published by . This book was released on 2017 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Endocrine disruption is an issue of emerging concern in aquatic systems. Endocrine disruption has been documented to result in decreased reproductive success, skewed sex ratios, increased vitellogenin levels, intersex, disease, and death in a variety of freshwater fish species. In this study, intersex or the presence of testicular oocytes in gonochoristic fish species was utilized as an indicator of endocrine disruption. The study design is based on both a temporal and interspecific comparison of intersex occurrence through the use of paired historical and modern fish samples. The historical samples were obtained from the ichthyology collection at the Academy of Natural Sciences of Drexel University and replicate samples were collected in July and August of 2016. Historical samples from the Delaware sites include the oldest available specimens (from as early as 1898). The Susquehanna specimens spanned a longer time gradient with multiple samples (n=4) ranging from 1969 to 2016. Male Cyprinella analostana and C. spiloptera were collected from three sites in the Delaware and one site in the Susquehanna River basins. Twenty male specimens from each sample were analyzed histologically to document the prevalence and severity of intersex. Additionally, several smallmouth bass, Micropterus dolomieu were collected and assessed as a known sensitive species. Four potentially sensitive species were identified and assessed in 2017. These four species were Lepomis auritus, Ambloplites rupestris, Etheostoma zonale, and Notropis hudsonius, and represented additional modern specimens. These species were added in an attempt to gain a better understanding of how endocrine disruption impacts the entire fish community. No specimens analyzed in this study displayed intersex other than eight M. dolomieu collected from the Susquehanna River. Land cover data was used to calculate land cover percentages for each basin. Land cover percentages indicated that the greatest altered land cover type in the Susquehanna River basin was agriculture whereas developed land was the greatest altered land cover type for the three Delaware River basin sites. This study was a first attempt at using historical specimens to understand endocrine disruption prior to the emergence of the field in the late 20th century. Additionally, there is interest in identifying a small-bodied indicator species of endocrine disruption. Although C. analostana, C. spiloptera, L. auritus, A. rupestris, E. zonale, and N. hudsonius did not portray intersex, future efforts should focus on assessing other common, small-bodied species within the Delaware and Susquehanna River basins to identify a small-bodied indicator species that can be used to assess the impact of EDCs across an entire watershed.
Download or read book A Handbook of Statistical Analyses using R Third Edition written by Torsten Hothorn and published by CRC Press. This book was released on 2014-06-25 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Like the best-selling first two editions, A Handbook of Statistical Analyses using R, Third Edition provides an up-to-date guide to data analysis using the R system for statistical computing. The book explains how to conduct a range of statistical analyses, from simple inference to recursive partitioning to cluster analysis. New to the Third Edition Three new chapters on quantile regression, missing values, and Bayesian inference Extra material in the logistic regression chapter that describes a regression model for ordered categorical response variables Additional exercises More detailed explanations of R code New section in each chapter summarizing the results of the analyses Updated version of the HSAUR package (HSAUR3), which includes some slides that can be used in introductory statistics courses Whether you’re a data analyst, scientist, or student, this handbook shows you how to easily use R to effectively evaluate your data. With numerous real-world examples, it emphasizes the practical application and interpretation of results.
Download or read book Fish Diseases and Disorders Non infectious disorders written by John F. Leatherland and published by Oxford University Press, USA. This book was released on 1998 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book follows on from the first volume, on protozoan and metazoan infections, of a three-volume series. It focuses largely on finfish and considers non-infectious disorder of development, growth and physiology of wild and captive species. Various sections address topics such as tumourigenesis, stress physiology and the effects of stressors on particular processes, and the effect of environmental factors (including toxic substances) on fish health. The economic implications of non-infectious disorders in intensive aquaculture are of particular importance, and a chapter is devoted specifically to this. The final chapter describes evaluation methods for the assessment of disorders at the individual, population and community level. The book is indispensable for zoologists, veterinary scientists and those concerned with fisheries and aquaculture.
Download or read book Information and Technology Report written by and published by . This book was released on with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ground water Flow in the New Jersey Coastal Plain written by Mary Martin and published by . This book was released on 1998 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Effects of Contaminants written by S. W. Feist and published by . This book was released on 2004 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monitoring Fish and Wildlife for Environmental Contaminants written by Joel Jacknow and published by . This book was released on 1986 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Reuse written by National Research Council and published by National Academies Press. This book was released on 2012-07-17 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Expanding water reuse-the use of treated wastewater for beneficial purposes including irrigation, industrial uses, and drinking water augmentation-could significantly increase the nation's total available water resources. Water Reuse presents a portfolio of treatment options available to mitigate water quality issues in reclaimed water along with new analysis suggesting that the risk of exposure to certain microbial and chemical contaminants from drinking reclaimed water does not appear to be any higher than the risk experienced in at least some current drinking water treatment systems, and may be orders of magnitude lower. This report recommends adjustments to the federal regulatory framework that could enhance public health protection for both planned and unplanned (or de facto) reuse and increase public confidence in water reuse.
Download or read book Organic geochemistry of natural waters written by E.M. Thurman and published by Springer Science & Business Media. This book was released on 1985-04-30 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is written as a reference on organic substances in natural waters and as a supplementary text for graduate students in water chemistry. The chapters address five topics: amount, origin, nature, geochemistry, and characterization of organic carbon. Of these topics, the main themes are the amount and nature of dissolved organic carbon in natural waters (mainly fresh water, although seawater is briefly discussed). It is hoped that the reader is familiar with organic chemistry, but it is not necessary. The first part of the book is a general overview of the amount and general nature of dissolved organic carbon. Over the past 10 years there has been an exponential increase in knowledge on organic substances in water, which is the result of money directed toward the research of organic compounds, of new methods of analysis (such as gas chromatography and mass spectrometry), and most importantly, the result of more people working in this field. Because of this exponential increase in knowledge, there is a need to pull together and summarize the data that has accumulated from many disciplines over the last decade.
Download or read book National Pesticide Monitoring Program written by Christopher J. Schmitt and published by . This book was released on 1983 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Black Bass Diversity written by Michael D. Tringali and published by . This book was released on 2015 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Statistics for Censored Environmental Data Using Minitab and R written by Dennis R. Helsel and published by John Wiley & Sons. This book was released on 2012-02-01 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Praise for the First Edition " . . . an excellent addition to an upper-level undergraduate course on environmental statistics, and . . . a 'must-have' desk reference for environmental practitioners dealing with censored datasets." —Vadose Zone Journal Statistics for Censored Environmental Data Using Minitab® and R, Second Edition introduces and explains methods for analyzing and interpreting censored data in the environmental sciences. Adapting survival analysis techniques from other fields, the book translates well-established methods from other disciplines into new solutions for environmental studies. This new edition applies methods of survival analysis, including methods for interval-censored data to the interpretation of low-level contaminants in environmental sciences and occupational health. Now incorporating the freely available R software as well as Minitab® into the discussed analyses, the book features newly developed and updated material including: A new chapter on multivariate methods for censored data Use of interval-censored methods for treating true nondetects as lower than and separate from values between the detection and quantitation limits ("remarked data") A section on summing data with nondetects A newly written introduction that discusses invasive data, showing why substitution methods fail Expanded coverage of graphical methods for censored data The author writes in a style that focuses on applications rather than derivations, with chapters organized by key objectives such as computing intervals, comparing groups, and correlation. Examples accompany each procedure, utilizing real-world data that can be analyzed using the Minitab® and R software macros available on the book's related website, and extensive references direct readers to authoritative literature from the environmental sciences. Statistics for Censored Environmental Data Using Minitab® and R, Second Edition is an excellent book for courses on environmental statistics at the upper-undergraduate and graduate levels. The book also serves as a valuable reference for??environmental professionals, biologists, and ecologists who focus on the water sciences, air quality, and soil science.
Download or read book Centrarchid Fishes written by Steven Cooke and published by John Wiley & Sons. This book was released on 2009-09-08 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Centrarchid fishes, also known as freshwater sunfishes, include such prominent species as the Largemouth Bass, Smallmouth Bass and Bluegill. They are endemic to Eastern North America where they form part of a multi-million dollar sports fishing industry, but they have also been widely introduced around the globe by recreational anglers, in aquaculture programs and by government fisheries agencies. Centrarchid Fishes provides comprehensive coverage of all major aspects of this ecologically and commercially important group of fishes. Coverage includes diversity, ecomorphology, phylogeny and genetics, hybridization, reproduction, early life history and recruitment, feeding and growth, ecology, migrations, bioenergetics, physiology, diseases, aquaculture, fisheries management and conservation. Chapters have been written by well-known and respected scientists and the whole has been drawn together by Professors Cooke and Philipp, themselves extremely well respected in the area of fisheries management and conservation. Centrarchid Fishes is an essential purchase for all fish biologists, ecologists, fisheries managers and fish farm personnel who work with centrarchid species across the globe.
Download or read book Trichier written by Alessandra Ceretto and published by Lulu.com. This book was released on with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chesapeake Bay Study written by United States. Army. Corps of Engineers. Baltimore District and published by . This book was released on 1978 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contaminants of Emerging Concern in the Environment written by Rolf Halden and published by OUP USA. This book was released on 2011-09-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book documents the current science of CECs with important new data on the risks associated with a broad range of persistent organic pollutants.
