Oncorhynchus Kisutch Oncorhynchus Mykiss Oncorhynchus Articles & Analysis
11 articles found
Characteristics, structure and resources of the sector Summary South Africa has suitable environmental conditions for aquaculture development and opportunities for commercial production of various cultured species. The local aquaculture sector has performed below its potential and remains a minor contributor to national fishery products and the country’s GDP. However, more focus is being ...
The Office International des Epizooties, known by the acronym OIE, was founded almost 100 years ago. In May 2003 it broadened its scope and changed its name to the World Organization for Animal Health. Its stated mission is to ensure the transparent dissemination of animal health challenges with the goal of ensuring optimal animal health largely via education. The end result one would expect is ...
In vitro bioassays to estimate biotransformation rate constants of contaminants in fish are currently being investigated to improve bioaccumulation assessments of hydrophobic contaminants. The present study investigates the relationship between chemical substrate concentration and in vitro biotransformation rate of 4 environmental contaminants (9‐methylanthracene, pyrene, chrysene, and ...
Rainbow trout (Oncorhynchus mykiss) confined to respirometer‐metabolism chambers were dosed with perfluorooctane sulfonate (PFOS) by intra‐arterial injection and sampled to obtain concentration time‐course data for plasma, and either urine or expired water. The data were then analyzed using a two‐compartment clearance‐volume model. Renal and branchial clearance rates (CLR and CLB; mL/d/kg) ...
A study was performed to investigate the toxicity of fluoride to a variety of freshwater aquatic organisms and to establish whether water quality variables contribute substantively to modifying its toxicity. Water hardness, chloride and alkalinity were tested as possible toxicity modifying factors for fluoride using acute toxicity tests with Hyalella azteca and Oncorhynchus mykiss. Chloride ...
In 2011, a formulation of glyphosate called Cúspide 480SL® was chosen to replace Roundup‐SL®, Fuete‐SL®, and Gly‐41® for the control of Erythroxylum coca in Colombia. Cúspide 480SL contains the active ingredient glyphosate isopropylamine (IPA) salt, which is the same active ingredient used in previous formulations. However, Cúspide 480SL contains an alkyl polyglycoside surfactant rather than ...
Traditionally aquatic toxicity studies examine the toxicity of a single chemical to an organism, while organisms in nature may be exposed to multiple toxicants. Given this is a more realistic exposure scenario in situ, the authors were interested in understanding the interactive toxicity of multiple metals to aquatic organisms. We performed a series of studies using equitoxic mixtures of ...
The occurrence of pharmaceuticals in the environment presents a challenge of growing concern. In contrast to many industrial compounds, pharmaceuticals undergo extensive testing prior to their introduction to the environment. In principal, therefore, it may be possible to employ existing pharmacological safety data using biological “read‐across” methods to support screening‐level ...
Numerous models have been developed to predict the bioaccumulation of organic chemicals in fish. Although chemical dietary uptake can be modeled using assimilation efficiencies, bioaccumulation models fall into two distinct groups. The first group implicitly assumes that assimilation efficiencies describe the net chemical exchanges between fish and their food. These models describe chemical ...
Abstract As part of a broader investigation into the effects of creosote treatments on the aquatic biota in pond microcosms, we examined the possible implications for vitellogenin (Vtg) production in Oncorhynchus mykiss [rainbow trout (RT)]. Vtg is the precursor of egg yolk protein and has emerged as a useful biomarker of exposure to estrogenic substances. Our a priori intent was to assess the ...
Atrazine, metolachlord and simazine are herbicide active ingredients used for the aelective control of broadleaf weeds and grasses in field, nursery, and tree fruit crops. A manufaturer of atrazine is the Drexel Chemical Company (Memphis, TN, USA); and likewise metolachlor and simazine are produced by Syngenta Crop protection Canada, Inc. (Guelph, ON, ...