Razorback sucker (Xyrauchen texanus) larvae from adults exposed to selenium at three sites near Grand Junction, Colorado, for 9 months were used in a 30-day waterborne and dietary selenium study. Selenium concentrations in water averaged <1.6 microg/L from 24-Road, 0.9 microg/L from Horsethief, 5.5 microg/L from Adobe Creek, and 10.7 microg/L from the North Pond. Selenium in dietary items avera...

A series of experiments using serological reagents was conducted to examine predation, ingestion and digestion in a model predator-prey system. The harpacticoid copepod Amphiascoides atopus, obtained from mass culture, was used as prey and the grass shrimp, Palaemonetes pugio, as predator. Bulk-gut passage time in P. pugio was measured by visualization of latex beads and ranged from 0.5 to 4 h ...

During viral infection in vertebrates, cytokines play important roles in the host defense against the virus. However, the function of cytokines in invertebrates has not been well characterized. In this study, shrimp cytokines involved in viral infection were screened using a cytokine antibody microarray. The results showed that three cytokines, the Fas receptor (Fas), platelet factor 4 (PF4) an...

Two epizootics of cultured shrimp occurred in India in 1994. The first case of mass mortalities of tiger shrimp Penaeus monodon in July 1994 was very similar to that caused by yellowhead virus (YHV) infection with regard to gross clinical signs, host species and size of shrimp affected, but it was histologically atypical. Very interestingly, intranuclear inclusions typical of a white spot syndr...

BACKGROUND Recent work suggested that the presence of specific memory or some form of adaptive immunity occurs in insects and shrimp. Hypervariable pattern recognition molecules, known as Down syndrome cell adhesion molecules, are able to mount specific recognition, and immune priming in invertebrates. In the present study, we attempted to understand the immune response pattern of white shrimp ...

Frozen food is one of Bangladesh’s most valuable export items, comprising more than 80% shrimp. The cultivated area shrimp situated in the southern region Bangladesh. This research was carried out to identify core problem farming areas order support related farmers seeking a solution through common technology used by them. study conducted Shyamnagar, Satkhira district with total 40 female respo...

This study aims to map and analyze the white-leg shrimp supply chain institutions. research was conducted in July-September 2020. Data were collected using structured interviews in-depth interviews. The results showed that white leg consisted of providers production inputs, cultivators, small traders, collectors, exporters. need for partnerships through professional business management contract...

The cDNAs encoding CathL and legumain from Chinese white shrimp Fenneropenaeus chinensis (FcCathL, FcLegu) were obtained. Both FcCathL and FcLegu mRNA were expressed mainly in the hepatopancreas of unchallenged shrimp. Time-course analysis of FcCathL showed that FcCathL was upregulated in the hepatopancreas of shrimp challenged with white spot syndrome virus (WSSV) at 12 h. FcLegu mRNA in hepat...

White spot syndrome (WSS) is a viral disease which affects most of the commercially cultivated marine shrimp species all over the world causing significant losses. Deaths occur within days of symptoms and affect a diverse range of commercial crustacean species. A heavy mortality is usually observed in the entire infected population. Survival rates can be anywhere from 30% to zero. Consequently,...

many shrimp farmers were suffering from white spot disease (wsd) onset in last decades. oscillation of environmental factors could lead mortality in susceptible hosts. the results showed mortality started earliear (36h post inoculation) at 25oc in comparison to the temperature more than 29 oc as well as the salinity of 50 ppt in comparison to the lower degrees of salinities. it is concluded tha...