| defeating diplostomoid dangers in usa catfish aquaculture. | diplostomoid digenean metacercariae have caused widescale mortalities of channel catfish, ictalurus punctatus (rafinesque), at aquaculture farms in louisiana, mississippi and arkansas, usa. originally, based on a tentative diagnosis, the industry considered the primary harmful agent to be an introduced species from europe, bolbophorus confusus (krause, 1914), frequently reported from the american white pelican, pelecanus erythrorhynchos gmelin. our group has now shown, using its 1-2 plus three m ... | 2004 | 15357393 |
| rapid quantitative detection of aeromonas hydrophila strains associated with disease outbreaks in catfish aquaculture. | a new strain of aeromonas hydrophila has been implicated in significant losses in farm-raised catfish. outbreaks attributable to this new strain began in alabama in the summer of 2009 and have spread to arkansas and mississippi in subsequent years. these outbreaks mostly afflicted market-sized fish and resulted in considerable losses in short periods of time. the present research was designed to develop an expeditious diagnostic procedure to detect the new strains of a. hydrophila due to the rap ... | 2013 | 23847227 |
| pesticide and mercury residues in commercially grown catfish. | in 1970, 54 commercial catfish farms in arkansas and mississippi were sampled for pesticide and mercury residues. pesticide residues above fda action levels were detected in 15 percent of the fish samples. data on residues in sediment, fish feed, and source water suggest that fish were not being contaminated from these sources. average fish residue per county was, however, strongly correlated with the percent of total acres planted in cotton and soybeans. results strongly suggest that cotton pro ... | 1975 | 1161448 |
| pcdd, pcdf, and pcb in farm-raised catfish from southeast united states--concentrations, sources, and cyp1a induction. | nine catfish fillets, three catfish nuggets, two feed samples, and one pond sediment were analyzed for pcdd, pcdf, and pcb. farm-raised catfish from mississippi, alabama, and arkansas contained significant levels of 2,3,7,8-substituted pcdd and pcdf. in addition, a large number of non-2,3,7,8-substituted congeners were present in all samples. the catfish fillets and catfish nuggets also contained high concentrations of dioxin-like pcb, as well as a number of non-dioxin-like pcb. the teq based on ... | 2018 | 9828294 |
| pcdd and pcdf contamination in catfish feed from arkansas, usa. | one combined catfish feed sample from arkansas, usa, and its eight ingredients were analyzed for pcdds and pcdfs. one of the ingredients, soybean meal, was highly contaminated by pcdds, especially the toxic 2,3,7,8-substituted congeners, e.g., 7.3 pg/g dry weight or 370 pg/g lipid for the 2,3,7,8-tetra cdd. the i-teq value for the soybean meal was 11.4 pg/g dry weight or 576 pg/g fat. the corresponding values for the combined catfish feed concentrations were approximately 3 times lower. the cong ... | 1998 | 9745703 |
| expression of hepatic metallothionein messenger rna in feral and caged fish species correlates with muscle mercury levels. | metallothioneins (mts) are low-molecular-weight cytosolic proteins that are induced by cellular stress as well as exposure to various heavy metals including mercury. excessive residues of mercury have recently been identified in various fish species of the lower ouachita river system in arkansas. fillets of mature largemouth bass (micropterus salmoides) collected from woodard lake, an ox-bow lake of the ouachita river, possessed muscle residues of mercury ranging from 0.3 to 1.0 ppm (micrograms/ ... | 1995 | 7498068 |