scholarly journals Mangroves, people and cockles: impacts of the shrimp-farming industry on mangrove communities in Esmeraldas Province, Ecuador.

2009 ◽  
pp. 140-153 ◽  
Author(s):  
P. Ocampo-Thomason
Keyword(s):  
Shrimp Farming ◽  
Farming Industry ◽  
Mangrove Communities

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 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 The waste remover in aquaculture ponds

2020 ◽  
Vol 3 (SI1) ◽  
pp. First
Author(s):  
Le The Truyen ◽  
Le Thanh Long
Keyword(s):  
Negative Impact ◽  
Development Trend ◽  
Shrimp Farming ◽  
Bottom Surface ◽  
Water Stream ◽  
General Design ◽  
Intensive Farming ◽  
Shrimp Industry ◽  
Farming Industry ◽  
And Control

Over the past decade, Vietnam's shrimp industry has made great progress and brings Vietnam into the rank of the world's largest shrimp exporters. The development trend of the shrimp industry in the world as well as in Vietnam today is in the direction of intensive and super-intensive farming, technology innovation to enhance productivity and quality. However, the shrimp farming industry in Vietnam is facing many difficulties; one of them is the problem of environmental pollution, raising the negative impact on the economic effectiveness of farming. Causes are mainly due to excess food and untreated shrimp waste accumulated on the pond bottom surface and disintegrated to reduce dissolved oxygen concentration, release toxic gases such as NH3, H2S and create a favorable environment for harmful microorganisms to develop. Therefore, it is necessary to have a countermeasure to thoroughly remove waste from the farming environment. This paper introduces a general design of a waste remover, which is needed for shrimp farming ponds to remove waste and solve the mentioned problem. This equipment moves on the bottom surface of the pond and can be autonomous or manually remote controlled. During the working process, the equipment brushes waste on the bottom surface of the pond and suck it into the filter bag. The waste remover includes such following main units: traveling unit, brushing unit, sucking unit, frame unit, transmission, and control systems. The equipment uses the principle of axial pumping, sucks waste along the water stream by reducing the pressure inside the equipment, and transfers waste into filter bags. This general design basically meets the requirement of waste removal and can be fundamental for designing the detailed units, manufacturing, and experiment implementation of equipment in the future.

scholarly journals Calculation method for charging water on shrimp farming

RBRH ◽  
2016 ◽  
Vol 21 (4) ◽  
pp. 789-796 ◽  
Author(s):  
Lorena Soares Monteiro ◽  
David Araujo Borges ◽  
Ticiana Marinho de Carvalho Studart ◽  
José Nilson Bezerra Campos ◽  
Francisco Suetônio Bastos Mota
Keyword(s):  
Calculation Method ◽  
Water Demand ◽  
Shrimp Farming ◽  
Production Costs ◽  
Productive Performance ◽  
Easy Task ◽  
Rational Use ◽  
The One ◽  
Farming Industry ◽  
Global Water

ABSTRACT The increase of global water demand has stimulated the application of water charging to seek its rational use. However, the establishment of the water tariff for a certain use is not an easy task, given that this tariff must have an elevated value, sufficient to encourage the rational use, but not so elevated, in a manner that compromises or prevents the development of production activities. The present study aimed to evaluate different water tariff values proposed and applied to the shrimp farming industry in Ceará, from 2003 to 2016, and analyze the sensitivity of the industry to these values. The analyses considered the productive performance of the shrimp farming observed by the producers, production costs for the activity, and incomes earned by the producers in 2008. The present study demonstrated that the only tariff value that makes the sector financially attractive is R$1.00/1,000m3, a lower value than the one previously proposed by the state of Ceará (R$ 31.20/1,000m3), which was reduced in the following years. In this context, a model was developed to fix tariffs for shrimp farming, which considers the payment capacity of the entrepreneur and the production costs to cultivate shrimp.

scholarly journals Biofloc production in activated sludge system treating shrimp farming effluent

2018 ◽  
Vol 23 (6) ◽  
pp. 1143-1152 ◽  
Author(s):  
Sandra Tedde Santaella ◽  
Maria do Socorro Vale ◽  
Clara Cabral Almeida ◽  
Willame de Araújo Cavalcante ◽  
Alberto Jorge Pinto Nunes ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Oxygen Demand ◽  
Shrimp Farming ◽  
Effluent Treatment ◽  
Nitrogen Compounds ◽  
Suitable Alternative ◽  
Activated Sludge System ◽  
Feed Cost ◽  
Shrimp Feed ◽  
Farming Industry

ABSTRACT The release of wastewater and the shrimp feed cost are the main challenges faced by the shrimp farming industry. An alternative solution to both problems is biofloc production in a unit external to the farm, in an activated sludge system for effluent treatment. The treatment system’s influent was composed of the shrimp farm wastewater supplemented with urea and sugarcane molasses. The results show that the average removal of chemical oxygen demand was 71% and the average biofloc production in the reactor was approximately 1.5g.L-1. Adding molasses to the influent contributed to the increase in the quantity and diversity of existing microorganisms that are beneficial to cultured shrimp. The mass balance of nitrogen compounds confirmed that nitrification occurred in the system. Therefore, the use of the activated sludge system is a viable and environmentally suitable alternative to produce bioflocs and shrimp farming effluent treatment.

scholarly journals ​​Nursery Rearing of Penaeus vannamei in Biofloc Systems with Different Salinities and Organic Carbon Sources

2022 ◽  
Author(s):  
T. Anand ◽  
A. Srinivasan ◽  
P. Padmavathy ◽  
P. Jawahar ◽  
J. Stephen Sampathkumar
Keyword(s):  
Present Experiment ◽  
Carbon Sources ◽  
Shrimp Farming ◽  
Penaeus Vannamei ◽  
Nitrogenous Waste ◽  
Significant Difference ◽  
Farming Industry ◽  
Waste Accumulation ◽  
Average Body ◽  
Lower Production

Background: Nursery rearing of Penaeus vannamei became inevitable in the Indian shrimp farming industry, since intensification of culture practices in grow-out systems caused nitrogenous wastes accumulation, diseases, mortality and premature harvests resulted in high food conversion ratio, lower production and profits. The nursery rearing in traditional water exchange systems often getting failure because of nitrogenous waste accumulation. Hence, the present experiment was planned to rear P. vannamei in bioflocs systems (BFS) with different salinities and carbon sources. Methods: The experiment was conducted in 0.22 m3 tanks with three different salinity groups viz., 35 ppt, 20 ppt and 5 ppt and in each salinity sugar, molasses used as carbon sources to maintain an estimated C/N ratio of 15:1 and controls without carbon sources. Experimental tanks were stocked @6 post larvae/l, with pre-salinity acclimatized P.vannamei seeds having 0.0029±0.0003g size and nursed for a period of 5 weeks. Result: The nitrogenous waste accumulation was reduced significantly (p less than 0.05), also average body weight and survival rate of the seeds showed significant difference (p less than 0.001) between treatments and controls and within treatments (p less than 0.05). Salinity, carbon sources and their interaction influenced the growth characteristics significantly (p less than 0.01). The present experiment manifested promising results of bioflocs nurseries in rearing of P. vannamei seeds at different salinities.

scholarly journals ESTABLISH THE INITIAL PROCEDURE FOR DETECTING VIBRIO PARAHAEMOLYTICUS IN THE SHRIMP BY ONE STEP- PCR METHOD

2020 ◽  
Vol 39 (03) ◽  
Author(s):  
THI-HUYEN TRAN ◽  
HOANG-ANH PHAN THI ◽  
LOC TRAN
Keyword(s):  
Vibrio Parahaemolyticus ◽  
Detection Threshold ◽  
Disease Status ◽  
Early Mortality ◽  
Shrimp Farming ◽  
Early Mortality Syndrome ◽  
Initial Procedure ◽  
One Step ◽  
Pcr Method ◽  
Farming Industry

Early Mortality Syndrome (EMS), also known as Acute Hepatopancreas Necrosis Disease (AHPND) in shrimps, has been identified as being caused by a strain of V. parahaemolyticus. This disease has caused enormous damage to the shrimp farming industry among countries in the world in general and Vietnam in particular. One of the main reasons for uncontrollable widespread disease is the process of identifying pathogens is slow and inaccurate, leading to no promptly preventive measurement. In order to enhance the ability to briefly detect disease and improve the current disease status, in this study the PCR process using two specific 16S rRNA and ldh primers has been developed to swiftly diagnose V. parahaemolyticus pathogen in shrimps with a detection threshold of 3.5x103 CFU/ml

scholarly journals Designing the Yellow Head Virus Syndrome Recognition Application for Shrimp on an Embedded System

2019 ◽  
Vol 6 (2) ◽  
pp. 48-63
Author(s):  
Truong Quoc Bao ◽  
Tran Chi Cuong ◽  
Nguyen Dinh Tu ◽  
Le Hoang Dang ◽  
Luu Trong Hieu
Keyword(s):  
Image Processing ◽  
Embedded System ◽  
Food Industry ◽  
Virus Disease ◽  
Shrimp Farming ◽  
Raspberry Pi ◽  
Disease Group ◽  
Image Processing Algorithm ◽  
Yellow Head Virus ◽  
Farming Industry

One of the most serious problems confronted by the shrimp farming industry is the disease caused by the yellow head virus (YHV). This research proposes an image processing algorithm to detect, identify and eliminate shrimp with the yellow head virus from the Litopenaeus vannamei gathering lines. Using a Raspberry Pi 3 module with the support of the OpenCV library which may be associated with Niblack’s algorithm is primarily suitable for segmentation. First, the shrimp object was identified and separated from the background using the image segmentation technique and the boundary that surrounds the object. Then, identification of diseased shrimp was analysed based on colour threshold. In this study, the sample of shrimp disease group had the highest amount of ratio, with about 6% to 11%. Most of the samples without the disease had a ratio of 0%. The experimental results show that the system can identify and accurately determine the coordinates of shrimp with yellow head virus disease and send information to the shrimp classification system in the food industry.

Sign in / Sign up

Export Citation Format

Share Document