| toxicity of aroclor-r 1254 and its physiological activity in several estuarine organisms. | the occurrence of high concentrations of a pcb (aroclor 1254) in the pensacola estuary prompted field and laboratory studies by the gulf breeze environmental research laboratory (epa). monitoring of the estuary indicates the chemical is present in all components--particularly in sediments and fishes. residues appear to be diminishing in sediments. toxicity tests show estuarine species sensitive at ppb concentrations in water, with a ciliate protozoan (tetrahymena pyriformis w), (fundulus similis ... | 1975 | 805570 |
| toxicity and bioconcentration of bhc and lindane in selected estuarine animals. | flow-through, 96-hr bioassays were conducted to determine the acute toxicity of technical bhc and lindane to several estuarine animals. test animals and their respective 96-hr lindane lc50 values were: mysid (mysidopsis bahia), 6.3 microgram/l; pink shrimp (penaeus duorarum), 0.17 microgram/l; grass shrimp (palaemonetes pugio), 4.4 microgram/l; sheepshead minnow (cyprinodon variegatus), 104 microgram/l; and pinfish (lagodon rhomboides), 30.6 microgram/l. the 96-hr lc50 values for pink shrimp and ... | 1977 | 71023 |
| [feeding habits and trophic ecology of the fish lutjanus griseus (pisces: lutjanidae) associated with submerged vegetation in laguna de términos, campeche, mexico]. | in campeche, mexico, the laguna de términos has thalassia testudinum beds inhabited by the grey snapper, lutjanus griseus (linnaeus 1758). along one year, we collected 994 individuals and 672 had food in their stomachs; we recorded number, weight, and frequency oftrophic groups, and the index of relative importance. dominant food components were farfantepenaeus duorarum and palemonetes octaviae, eucinostomus gula (cuvier 1830) and libinia dubia. salinity and temperature were related to the numbe ... | 2007 | 19086401 |
| white-spot syndrome virus (wssv) introduction into the gulf of mexico and texas freshwater systems through imported, frozen bait-shrimp. | we analysed 20 boxes of, frozen imported bait-shrimp (china: parapenaeopsis sp. and metapenaeopsis sp.) and 8 boxes of native, frozen bait-shrimp (gulf of mexico: litopenaeus setiferus and farfantepenaeus duorarum) by rt-pcr or pcr for taura syndrome virus (tsv), yellowhead virus/gill-associated virus (yhv/gav), white-spot syndrome virus (wssv) and infectious hypodermal and hematopoietic necrosis virus (ihhnv). all 28 boxes of shrimp were negative for tsv, yhv/gav and ihhnv; 2 boxes of imported ... | 2006 | 16956056 |
| the pink shrimp farfantepenaeus duorarum, its symbionts and helminths as bioindicators of chemical pollution in campeche sound, mexico. | the pink shrimp farfantepenaeus duorarum may acquire pollutants, helminths and symbionts from their environment. statistical associations were studied between the symbionts and helminths of f. duorarum and pollutants in sediments, water and shrimps in campeche sound, mexico. the study area spatially overlapped between offshore oil platforms and natural shrimp mating grounds. spatial autocorrelation of data was controlled with spatial analysis using distance indices (sadie) which identifies paras ... | 2006 | 16768859 |
| preliminary studies of biochemical changes (ethoxycoumarin o-deethylase activities and vitellogenin induction) in two species of shrimp (farfantepenaeus duorarum and litopenaeus setiferus) from the gulf of mexico. | several investigations have demonstrated that the increase in chemicals in the environment may have caused effects on aquatic life and wildlife. the impact from oil production activities on the benthic community structure and shrimp (farfantepenaeus duorarum and litopenaeus setiferus) biochemical markers were studied in the gulf of mexico, which is heavily contaminated by polycyclic aromatic hydrocarbons and heavy metals. shrimp were collected from a control area and from an area close to oil pr ... | 2005 | 15814315 |
| trophic accumulation and depuration of mercury by blue crabs (callinectes sapidus) and pink shrimp (penaeus duorarum). | mercury concentrations in blue crabs (callinectes sapidus) collected from an area of mercury-contaminated sediments in lavaca bay, tx, usa, are more than an order of magnitude greater than concentrations in penaeid shrimp from the same area. laboratory feeding experiments using mercury-contaminated fish as food showed that both blue crabs and pink shrimp (penaeus duorarum) could accumulate mercury concentrations comparable to those in their food in 28 days. calculated mercury assimilation effici ... | 2000 | 11285721 |
| susceptibility to taura syndrome virus of some penaeid shrimp species native to the gulf of mexico and the southeastern united states | experimental studies demonstrated that penaeus setiferus, but not penaeus aztecus or penaeus duorarum, could be killed by taura syndrome virus (tsv). however, specimens of p. setiferus that survived infection and both p. aztecus and p. duorarum at least 79 days postexposure that did not demonstrate gross signs of infection were shown to harbor virus by bioassay using penaeus vannamei, a highly susceptible target host. consequently, all three of those penaeids native to the southeast united state ... | 1997 | 9056467 |
| some aspects of myosin adenosine triphosphatase of pink shrimp (penaeus duorarum). | | 1974 | 4278375 |
| nutritional availability to rats of selenium in four seafoods: crab (callinectes sapidus), oyster (crassostrea virginica), shrimp (penaeus duorarum) and baltic herring (clupea harengus). | 1. the present study was conducted to determine the biological availability to rats of the selenium in four high-se seafoods: crab (callinectes sapidus), oyster (crassostrea virginica), shrimp (penaeus duorarum) and baltic herring (clupea harengus). 2. weanling male rats were fed on a se-deficient torula yeast diet for 4 weeks followed by either continued depletion or repletion for 4 weeks with 0.05, 0.1 or 0.2 microgram se as selenite/g, or 0.1 or 0.2 microgram se as freeze-dried cooked test fo ... | 1986 | 3676154 |
| a precipitin for human serum proteins as released into the environment by stressed bait shrimp, penaeus duorarum. | 1. a precipitin for human serum proteins is released into the environment by stressed bait shrimp, penaeus duorarum. 2. two-dimensional crossed immunoelectrophoresis revealed that the precipitin reacts (a) primarily with proteins belonging to the major group, alpha-1 globulin; and (b) with more proteins than a standard mammalian antiserum. 3. this study extends the variety of species known to liberate precipitins and suggests this response may be widespread among invertebrates. 4. the precipitin ... | 1987 | 3665420 |
| seasonal effects of leached mirex on selected estuarine animals. | four 28-day seasonal experiments were conducted using selected estuarine animals in outdoor tanks that received continuous flow of mirex-laden water. mirex (dodecachlorooctahydro-1,3,4-metheno-2h-cyclobuta [cd] pentalene) leached from fire ant bait (0.3% mirex) by fresh water and then mixed with salt water was toxic to blue crabs (callinectes sapidus), pink shrimp (penaeus duorarum), and grass shrimp (palaemonetes pugio) but not to sheepshead minnows (cyprinodon variegatus), at concentrations le ... | 1975 | 1190846 |
| heptachlor: toxicity to and uptake by several estuarine organisms. | technical-grade heptachlor (65% heptachlor, 22% trans-chlordane, 2% cis-chlordane, and 2% nonachlor) was tested in 96-hr bioassays to determine its toxicity to estuarine animals. the test organisms and the 96-hr lc50 or ec50s based on measured concentrations in water) are as follows: american oyster (crassostrea virginica), 1.5 mug/liter; pink shrimp (penaeus duorarum), 0.11 mug/liter; grass shrimp (palaemonetes vulgaris), 1.06 mug/liter; sheepshead minnow (cyprinodon variegatus), 3.68 mug/liter ... | 1976 | 966323 |
| effects of leached mirex on experimental communities of estuarine animals. | experimental communities of various estuarine animals in outdoor tanks were exposed to a continuous flow of water containing mirex for 10 weeks. the mirex was leached from fire ant bait (0.3% active ingredient) by fresh water which was then mixed with salt water to yield exposure concentrations averaging 0.038 mug/l. the experiment simulated runoff from treated land into estuarine areas. mortality of grass shrimp (palaemonetes vulgaris), pin, shrimp (penaeus duorarum), common mud crabs (panopeus ... | 1976 | 999334 |
| chlordane: effects on several estuarine organisms. | dynamic marine toxicity tests were performed with technical grade chlordan and eastern oysters (crassostrea virginica), pink shrimp (penaeus duorarum), grass shrimp (palaemonetes pugio), sheepshead minnows (cyprinodon variegatus), and pinfish (lagodon rhomboides). the 96-hr lc20s (and 95% confidence limits) based on measured concentrations of chlordane (in mug/liter) are: ping shrimp 0.4 (0.3-0.6); grass shrimp, 4.8 (4.0-6.0); sheepshead minnows, 24.5 (19.9-28.6); and pinfish, 6.4 (5.0-7.3). the ... | 1976 | 1246088 |
| hazard assessment of resmethrin: i. effects and fate in aquatic systems. | a comparative aquatic hazard assessment of resmethrin was conducted to investigate the need for its restricted use classification by the us. epa as an adult mosquito control agent. this paper describes the environmental fate and aquatic toxicity of resmethrin. the following paper compares resmethrin to the alternative insecticides. environmental fate studies indicate that resmethrin has a short photolytic half-life in water (<1 h). furthermore, it is immobile in soil and biodegradable (half-life ... | 2002 | 11990766 |