Farm-level economic cost of Enterocytozoon hepatopenaei (EHP) to Indian Penaeus vannamei shrimp farming

Aquaculture ◽  
2021 ◽  
pp. 737685
Author(s):  
R. Geetha ◽  
S. Avunje ◽  
H.G. Solanki ◽  
R. Priyadharshini ◽  
S. Vinoth ◽  
...  
Keyword(s):  
Economic Cost ◽  
Shrimp Farming ◽  
Penaeus Vannamei ◽  
Farm Level ◽  
Enterocytozoon Hepatopenaei

scholarly journals The effect of salinity on enterocytozoon hepatopenaei infection in Penaeus vannamei under experimental conditions

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
L. F. Aranguren Caro ◽  
F. Alghamdi ◽  
K. De Belder ◽  
J. Lin ◽  
H. N. Mai ◽  
...  
Keyword(s):  
Penaeus Monodon ◽  
Oral Route ◽  
Western Hemisphere ◽  
Penaeus Vannamei ◽  
Asian Countries ◽  
Experimental Conditions ◽  
Reliable Source ◽  
Specific Pathogen ◽  
Enterocytozoon Hepatopenaei ◽  
First Time

Abstract Background Enterocytozoon hepatopenaei (EHP) is an enteric pathogen that affects Penaeus vannamei and Penaeus monodon shrimp in many SE Asian countries. In the western hemisphere, EHP was reported for the first time in 2016 in farmed P. vannamei in Venezuela. Anecdotal evidence suggests that EHP is more prevalent in grow-out ponds where the salinity is high (> 15 parts per thousand (ppt)) compared to grow-out ponds with low salinities (< 5 ppt). Considering that P. vannamei is an euryhaline species, we were interested in knowing if EHP can propagate in P. vannamei in low salinities. Results In this study, we described an experimental infection using fecal strings as a source inoculum. Specific Pathogen Free (SPF) P. vannamei were maintained at three different salinities (2 ppt, 15 ppt, and 30 ppt) while continuously challenged using feces from known EHP-infected P. vannamei over a period of 3 weeks. The fecal strings, used as a source of EHP inocula in the challenges, was sufficient to elicit an infection in shrimp maintained at the three salinities. The infectivity of EHP in shrimp reared at 2 ppt, 15 ppt, and 30 ppt salinities was confirmed by PCR and histopathology. The prevalence and the severity of the EHP infection was higher at 30 ppt than at 2 ppt and 15 ppt. Conclusion The data suggests that fecal strings are a reliable source of EHP inoculum to conduct experimental challenges via the fecal-oral route. An EHP infection can occur at a salinity as low as 2 ppt, however, the prevalence and the severity of the EHP infection is higher at a salinity of 30 ppt.

scholarly journals Sustainability and feasibility assessments of nanobubble aeration technology in economic-socio environment of Penaeus vannamei shrimp farming

2021 ◽  
Vol 33 ◽  
pp. 05005
Author(s):  
Lily Susanti ◽  
Suyud Warno Utomo ◽  
Noverita Dian Takarina
Keyword(s):  
Net Present Value ◽  
Ammonia Nitrogen ◽  
Payback Period ◽  
Economic Feasibility ◽  
Shrimp Farming ◽  
Penaeus Vannamei ◽  
Present Value ◽  
Community Members ◽  
The Social ◽  
Total Ammonia

Penaeus vannamei shrimp farming in Indonesia is faced with several challenges in the environmental, economic, and social aspects. Therefore, this study aims to assess the benefits of novel nanobubble aeration systems for the ecosystem, businesses, and communities. This is an experimental study conducted by comparing P. vannamei post larva 10 reared at a density of 2000 inds./L in a pond treated with nanobubble and without treatments (control). Furthermore, the Net Present Value (NPV) and payback period were calculated to assess the economic feasibility of nanobubble, while community interviews were used for the social sectors. Based on the results, environmental wastes of shrimp farming in form of total ammonia nitrogen (TAN) were reduced by 9% from 2.58 mg/l (95%CI: 0,91, 4,25) in control compared to 2.35 mg/l (95%CI: 0,86, 3,84) in treatment. Furthermore, the revenues from post larva sales for five years and nanobubble investment costs showed that the estimated NPV was IDR 64,824,374 with a payback period of 1.7 years. The interviews on traditional shrimp farming showed that 61.1% to 72.2% of community members agreed on the use of nanobubble aeration to support livelihoods. Therefore, the use of nanobubbles is feasible to support sustainable P. vannamei farming.

First report on Enterocytozoon hepatopenaei (EHP) infection in Pacific white shrimp (Penaeus vannamei) cultured in Korea

Aquaculture ◽  
2022 ◽  
Vol 547 ◽  
pp. 737525
Author(s):  
Ji Hyung Kim ◽  
Chorong Lee ◽  
Hye Jin Jeon ◽  
Bum Keun Kim ◽  
Nam-kyung Lee ◽  
...  
Keyword(s):  
Pacific White Shrimp ◽  
White Shrimp ◽  
Penaeus Vannamei ◽  
First Report ◽  
Enterocytozoon Hepatopenaei

Detection of Enterocytozoon hepatopenaei using an invasive but non-lethal sampling method in shrimp (Penaeus vannamei)

2019 ◽  
Vol 162 ◽  
pp. 38-41 ◽  
Author(s):  
Roberto Cruz-Flores ◽  
Hung N. Mai ◽  
Brenda L. Noble ◽  
Paul J. Schofield ◽  
Arun K. Dhar
Keyword(s):  
Sampling Method ◽  
Penaeus Vannamei ◽  
Enterocytozoon Hepatopenaei

scholarly journals Determination of the Infectious Agent of Translucent Post-Larva Disease (TPD) in Penaeus vannamei

Pathogens ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 741 ◽  
Author(s):  
Ying Zou ◽  
Guosi Xie ◽  
Tianchang Jia ◽  
Tingting Xu ◽  
Chong Wang ◽  
...  
Keyword(s):  
Clinical Signs ◽  
Infectious Agent ◽  
Systematic Investigation ◽  
Shrimp Farming ◽  
Histopathological Analysis ◽  
Penaeus Vannamei ◽  
Challenge Tests ◽  
Acute Hepatopancreatic Necrosis Disease ◽  
Farming Industry

A new emerging disease called “translucent post-larvae disease” (TPD) or “glass post-larvae disease” (GPD) of Penaeus vannamei, characterized by pale or colorless hepatopancreas and digestive tract, has become an urgent threat to the shrimp farming industry. Following this clue that treatment of an antibacterial agent could alleviate the disease, systematic investigation of the potential infectious agent of TPD was conducted using bacterial identification and artificial challenge tests to fulfill Koch’s postulates. A dominant bacterial isolate, Vp-JS20200428004-2, from the moribund individuals was isolated and identified as Vibrio parahaemolyticus based on multi-locus sequence analysis. However, Vp-JS20200428004-2 differed from the V. parahaemolyticus that caused typical acute hepatopancreatic necrosis disease. Immersion challenge tests revealed that Vp-JS20200428004-2 could cause 100% mortality within 40 h at a dose of 1.83 × 106 CFU/mL, and experimental infected shrimp showed similar clinical signs of TPD. The Vp-JS20200428004-2 could be re-isolated and identified from the experimental infected individuals. Moreover, histopathological analysis of diseased samples indicated that Vp-JS20200428004-2 caused severe necrosis and sloughing of epithelial cells of the hepatopancreas and midgut in shrimp individuals both naturally and experimentally infected. Our present results indicated that Vp-JS20200428004-2 is a highly virulent infectious agent associated with the TPD and deserves further attention.

scholarly journals Bacterial Community Changes in Penaeus vannamei Boone, 1931 Surface and Rearing Water During Enterocytozoon hepatopenaei Infection

2021 ◽  
Vol 34 (2) ◽  
Author(s):  
PALLAVI BALIGA ◽  
◽  
PUNEETH THADOORU GOOLAPPA ◽  
MALATHI SHEKAR ◽  
S.K. GIRISHA ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Bacterial Community Composition ◽  
Pond Water ◽  
Economic Losses ◽  
Penaeus Vannamei ◽  
Limited Information ◽  
Genetic Information Processing ◽  
Community Changes ◽  
Disease Indicators ◽  
Enterocytozoon Hepatopenaei

White faeces syndrome is one of the major disease problems in shrimp aquaculture, resulting in enormous economic losses to farmers. Although white faeces syndrome is usually associated with Enterocytozoon hepatopenaei (EHP) infections, it may not be the sole cause for the occurrence of white faecal strings on the pond water surface. There is limited information on the microbial dynamics in a pond affected by white faeces syndrome. Hence, this study aimed at the bacterial community changes occurring on the surface of shrimp Penaeus vannamei Boone, 1931 afflicted by the white faeces syndrome and the pond water in which it was reared. The pond water and the shrimp surface shared >45 % of the operational taxonomic units (OTUs), reflecting the influence of water quality on the bacterial community composition on the shrimp surface. Among these, the Proteobacteria formed the principal phyla and remained unaltered throughout the culture period. Bacteroidetes formed the second largest group across samples, followed by Cyanobacteria, Actinobacteria, Planctomycetes, Verrucomicrobia and Chloroflexi. The relative abundance levels of health indicator bacterial families such as Thiotrichaceae,Microbacteriaceae and Chitinophagaceae showed significant fluctuations on the shrimp surface. Disease indicators such as Rickettsiaceae, Mycobacteriaceae showed an increase in numbers on the shrimp surface. PICRUSt functional predictions revealed higher abundances of genes involved in metabolism and genetic information processing. The study provides valuable findings on the bacterial communities of rearing water and shrimp surface associated with white faeces syndrome.

scholarly journals Sustainable Shrimp Farming: Biosecure Systems to Prevent or Control Emerging Diseases

2020 ◽  
Vol 3 (3) ◽  
Keyword(s):  
White Spot Syndrome Virus ◽  
Emerging Diseases ◽  
Shrimp Farming ◽  
Penaeus Vannamei ◽  
Business Sustainability ◽  
Bacterial Diseases ◽  
Yellow Head Virus ◽  
Infectious Myonecrosis Virus ◽  
Specific Pathogen ◽  
Farming Industry

In any aquaculture business, sustainability of a system improved profits. At present although biosecurity and BAqP are in place, more needed to be done. With emerging disease challenges innovated designs and operation systems are developing for sustainable production. One of the most important factors the investors, shrimp farmers and technicians need to be aware of is that whatever waste discharged into environment will come back to you in a form of disease sooner or later. Before mid1990s major threats to shrimp farming was mainly bacterial diseases. In Asia from late 1994 appearance of viral diseases such as white spot syndrome virus (WSSV) and a few others like yellow head virus (YHV), infectious myonecrosis virus (IMNV). In 2001 with availability of Specific Pathogen Free (SPF) Penaeus vannamei broodstock from Hawaii, the shrimp farming industry took off much faster.

scholarly journals Design and development of an automatic feeder for Penaeus vannamei culture

2017 ◽  
Vol 64 ◽  
Author(s):  
P. Nila Rekha ◽  
K. Ambasankar ◽  
S. Stanline ◽  
K. Sethuraman ◽  
J. Syamadayal ◽  
...  
Keyword(s):  
Control Unit ◽  
Shrimp Farming ◽  
Penaeus Vannamei ◽  
Digital Display ◽  
Potential Productivity ◽  
Productivity Level ◽  
Automatic Feeder ◽  
Maximum Quantity ◽  
Feeder Design ◽  
On Farm

The introduction of Penaeus vannamei Boone, 1931, during 2009 opened up a new vista in Indian aquaculture. Presently, 90% of shrimp farming in the country is contributed by P. vannamei. The potential productivity level is around 10-12 t ha-1 and handling the feed during the course of culture increases considerably especially towards the end of culture period. This calls for automation in shrimp farming especially for feeding practices so that labour problem faced by the industry could be solved. The biosecurity requirement for vannamei farming can also be best met with the use of automatic feeders. The present study attempted designing and development of an indigenous automatic feeder for P. vannamei culture. The feeder design comprised four major components viz., feed hopper, distribution mechanism, a control unit for regulating the quantity and frequency of feeding and the power supply unit. Automation is effected through two timers with a digital display so that dispensing of the feed as well as duration of feeding could be easily adjusted by the farmers. Performance evaluation of the automatic feeder was done exhaustively and the results clearly showed that the maximum dispersion distance was 39 m dia and the maximum quantity of feed dispersed was 620 g in 5 sec. On farm evaluation of the feeder was also carried out in a shrimp pond and the installation height was optimised as approximately 75 cm - 1 m from the water level for facilitating better dispersion of the feed.

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