Multiple comparisons tests (MCTs) include the statistical used to compare groups (treatments) often following a significant effect reported in one of many types linear models. Due variety data and considerations, several dozen MCTs have been developed over decades, with ranging from very similar each other different other. Many scientific disciplines use MCTs, including >40,000 reports their ecological journals last 60 years. Despite ubiquity utility issues remain terms correct reporting....

Aspergillus flavus is considered a generalist-opportunistic pathogen, but studies are beginning to show that A. populations have strains specific various hosts. The research objective was determine whether soil consist of solely saprophytic and which can be facultatively parasitic on corn. isolated from both corn kernels within 11 Louisiana fields. Sixteen vegetative compatibility groups (VCGs) were identified among 255 isolates. Only 6 the 16 VCGs in 612 isolates 88% two VCGs, whereas only...

Swine (Sus scrofa Linnaeus) are an invasive species with a negative impact on native terrestrial plant and animal diversity. Further, in its range, excessive population size has been perceived as potential problem. The effects of swine aquatic organisms remain poorly documented. We investigated the effect unmanaged feral free ranging upon habitat, invertebrates microbes coastal plain stream Louisiana. Sampling was conducted twice yearly, spring fall, from August 2002 through April 2004, at...

Abstract Chemical dispersants are an important technology in the remediation of oil spills aquatic environment, facilitating degradation crude and salinity is factor dispersant effectiveness. The aim present study was to explore role on chemistry polycyclic aromatic hydrocarbons (PAHs) acute toxicity water‐accommodated fraction (WAF) COREXIT 9500A chemically dispersed a common estuarine fish. Laboratory microcosms were designed at salinities 4 parts per thousand (ppt), 12 ppt, or 18 ppt...

harvest data suggest that feral hog (Sus scrofa) populations in western Louisiana are increasing, and population control this region is complicated by the mixing of domestic free-ranged hogs. Aggressive management may be warranted as hogs appear to having unexpected effects on their ecosystem. We present results 3 recent investigations genetic source-tracking link waterborne bacteria with from integrate our most fi ndings regarding: (1) water quality a watershed without (2) aquatic biota...

Abstract The Atchafalaya River Basin Floodway (ARBF), a regulated river/floodplain distributary of the Mississippi River, experiences an annual flood pulse that strongly influences floodplain physicochemistry. We developed several metrics to investigate relationship between timing and magnitude hypoxia, which in most years is spatially extensive temporally prolonged problem lower ARBF. Principal components analysis from 2001 2009 revealed contrasting types (early cool late warm), but...

Riparian systems in the western United States provide important habitat for bird communities during all times of year. In recent decades, invasive plants, such as Russian olive (Elaeagnus angustifolia), have achieved broad distribution and local dominance many riparian areas, raising concerns over loss ecological function within these systems. 2005 2006 we conducted avian point counts surveyed vegetation cover at 95 points along Snake Columbia Rivers southeastern Washington to investigate...

Abstract We targeted wadeable streams in six USEPA Level III ecoregions spanning eight major study basins northern Gulf of Mexico coastal plains and terraces to identify appropriate spatial frameworks for the assessment stream quality, as well fish species macroinvertebrate families that were characteristic least disturbed conditions. analyzed previously collected (1990–2006) recently (2005–2010) data with mean similarity analysis frameworks, either or ecoregions, macroinvertebrates. also...

Nyman, J.A.; Baltz, D.M.; Kaller, M.D.; Leberg, P.L.; Parsons Richards, C.; Romaire, R.P., and Soniat, T.M., 2013. Likely changes in habitat quality for fish wildlife coastal Louisiana during the next fifty years.Louisiana's 2012 Master Plan a sustainable coast was designed to minimize economic damage from storm surges maximize wetland wildlife. Selecting projects inclusion master plan depended partly on models that simulated effects of management options environmental factors control We...

Abstract The Atchafalaya River basin (ARB), a 5,000‐km 2 river–floodplain system in south‐central Louisiana, provides one of the most popular fisheries state for anglers pursuing bass Micropterus spp., sunfishes Lepomis crappies Pomoxis and catfishes Ictalurus spp. Hurricanes Katrina Rita struck August September 2005, resulting tremendous changes habitat water quality ARB. Although short‐term long‐term impacts these storms on this floodplain ecosystem remain poorly understood, fish...

Social defeat is a powerful experience leading to drastic changes in physiology and behavior, many of which are negative. For example, repeated social vertebrates results reduced reproductive success, sickness behavioral abnormalities that threaten individual survival species persistence. However, little known about what neural mechanisms involved determining whether an resilient or susceptible stress. It also remains unknown exclusive use reactive behaviors after maintained over time...

We surveyed random and convenience samples of Louisiana, USA, waterfowl hunters after the 2009–2010 season, asked identical questions about waterfowl-hunting effort, success, satisfaction, regulatory alternatives, demographics. received 727 usable responses to our mail survey, 949 an on-line web survey that was accessible general public. Compared with respondents hunted more frequently, harvested waterfowl, placed greater importance on hunting. However, we noted similarities in attitudes...

Wetland acreage has declined continentally in the USA. With loss of natural wetlands, farmed wetlands may be a surrogate for wetlands. Seasonally, flooded rice fields are commonly managed on Gulf Mexico Coastal Plain. This study had two objectives: (1) catalog arthropod diversity fields; (2) investigate if detrital subsidies could elicit trophic cascades that reduce nuisance organisms. In 2013 and 2014, experimental plots were established, detritus was applied to half each year. Floating...

Abstract Water quality and river connectivity influence fisheries, but their role is not understood in wild crayfish harvest, or how water are incorporated into harvest strategies. In Louisiana, harvesting practices were evaluated with field observations interviews individual harvesters. Field included trap locations, quality, stable isotopes (2016) habitat components over two seasons (2015 2016). Traps set less turbid (NTU < 69.4), depths from 1 to 3 m 3.6 locations associated inputs....