| histopathological alterations in gills of white shrimp, litopenaeus vannamei (boone) after acute exposure to cadmium and zinc. | white shrimp, litopenaeus vannamei, a globally important cultured prawn species, is an ideal animal for studying the impairment caused by the effects of heavy metals that are often detected in coastal areas. in this present study, we detected the acute toxicity of cadmium (cd) and zinc (zn) to l. vannamei. medium lethal time (lt50) values of cd and zn on l. vannamei were estimated. furthermore, we also demonstrated that acute exposure to high concentrations of cd and zn resulted in morphological ... | 2009 | 18941701 |
| epidemiology and phylogenetic analysis of taura syndrome virus in cultured pacific white shrimp litopenaeus vannamei b. in taiwan. | taura syndrome virus (tsv) has spread worldwide, causing significant economic losses since taura syndrome was first described in ecuador in 1992. to determine the prevalence and impact of tsv infection on the shrimp farming industry in taiwan, pacific white shrimp litopenaeus vannamei b. were collected from 220 farms between 2004 and 2006 for viral detection by reverse transcription polymerase chain reaction. data showed that the overall tsv prevalence rate was 20% (43/220 farms). comparing shri ... | 2011 | 22235591 |
| chitinilyticum aquatile gen. nov., sp. nov., a chitinolytic bacterium isolated from a freshwater pond used for pacific white shrimp culture. | strain c14(t), originally isolated from surface water of a freshwater pond located in pingtung (southern taiwan) used for culture of pacific white shrimp (litopenaeus vannamei), was subjected to a polyphasic taxonomic approach. the strain exhibited strong chitinolytic activity and was able to grow under aerobic and anaerobic conditions by utilizing chitin exclusively as the carbon, nitrogen and energy source. phylogenetic analysis of the 16s rrna gene sequence revealed a clear affiliation of the ... | 2007 | 18048738 |
| tenacibaculum litopenaei sp. nov., isolated from a shrimp mariculture pond. | a yellow-coloured, aerobic, gram-negative, rod-shaped bacterial strain, designated b-i(t), was isolated from the water of a shrimp (litopenaeus vannamei) mariculture pond in taiwan. no species with a validly published name showed 16s rrna gene sequence similarity of more than 96.5 % to this novel isolate. the highest sequence similarities displayed by strain b-i(t) (93.2-96.1 %) were to members of the genus tenacibaculum. the phenotypic properties of this organism were consistent with its classi ... | 2007 | 17473274 |
| vibrio alginolyticus infection in the white shrimp litopenaeus vannamei confirmed by polymerase chain reaction and 16s rdna sequencing. | a gram-negative, rod-shaped bacterium identified as vibrio alginolyticus was isolated from diseased litopenaeus vannamei (also called penaeus vannamei) in taiwanese culture ponds. the diseased shrimp displayed poor growth, anorexia, inactivity, reddish pleural borders of antennae, uropods and telson, opaque and whitish musculature, and mortality. in histological preparations, melanized hemocytic granulomas were observed in the connective tissue around hemal sinuses together with hemocytic aggreg ... | 2004 | 15584425 |
| effects of cadmium and zinc on oxygen consumption, ammonium excretion, and osmoregulation of white shrimp (litopenaeus vannamei). | white shrimp, litopenaeus vannamei, a globally important cultured prawn species, is an ideal animal for studying the impairment caused by the effects of heavy metals that are often detected in coastal areas. the main purpose of the present study was to detect the acute toxicity of cd and zn to l. vannamei, and to investigate their effects on gill functions, which have not been carried out in this species before, hoping to obtain some important significance. first of all, we examined the acute to ... | 2004 | 15519404 |
| effect of ammonia on the immune response of white shrimp litopenaeus vannamei and its susceptibility to vibrio alginolyticus. | growth of vibrio alginolyticus was not affected by tsb medium containing ammonia-n concentration in the range of 0-20 mg l(-1). white shrimp litopenaeus vannamei (7-12 g in the intermolt stage) were challenged with v. alginolyticus, which had been incubated for 24 h in the tsb medium containing different concentrations of ammonia-n (0, 1, 5. 10 and 20 mg l(-1)). there was no significant difference in cumulative mortality for shrimp incubated in the tsb medium containing 0, 1, 5, 10 and 20 mg l(- ... | 2004 | 15123301 |