scholarly journals Effect of Mangrove Cover on Shrimp Yield in Integrated Mangrove-Shrimp Farming

2021 ◽  
Vol 34 (3) ◽  
Author(s):  
THAI THANH TRAN ◽  
NGUYEN THO ◽  
NGUYEN THI MY YEN ◽  
NGO XUAN QUANG ◽  
NGUYEN THI PHUONG THAO ◽  
...  
Keyword(s):  
Penaeus Monodon ◽  
Mekong Delta ◽  
Farming System ◽  
Shrimp Farming ◽  
Strong Positive Correlation ◽  
Shrimp Ponds ◽  
Black Tiger Shrimp ◽  
Southern Vietnam ◽  
Penaeus Indicus ◽  
De Man

In recent decades, mangroves have been seriously devastated by shrimp farming development in the Vietnamese Mekong Delta. As a result, integrated mangrove-shrimp farming has emerged as a potential solution to culture shrimps and protect mangroves. The present study aims to understand whether mangrove-to-pond cover ratios influence shrimp yields in an integrated mangrove-shrimp farming system. Five integrated mangrove-shrimp ponds in the Tam Giang Commune, Nam Can District, Ca Mau Province (Southern Vietnam) were chosen for this study. The study estimated that the mangrove-to-pond cover ratios ranged from 42.00 % to 72.50 %. The total shrimp yield per year (kg.ha-1 yr-1 ) was generally high, ranging from 76.62 to 249.09 (including 37.93 to 108.64 for the black tiger shrimp (Penaeus monodon Fabricius, 1798), and 38.69 to 140.45 for other shrimps, namely Penaeus indicus Milne Edwards, 1837, Penaeus merguiensis de Man, 1888, Metapenaeus ensis (De Haan, 1844), and Metapenaeus lysianassa (de Man, 1888)). Moreover, a strong positive correlation between the mangrove-to-pond cover ratios and the shrimp yields were observed (r > 0.71, P < 0.05). In conclusion the mangrove-to-pond cover ratios have a direct impact on the total shrimp yield. The mangrove-to-pond cover ratios should be 50 % to enhance shrimp yields in this system.

Salt balances of inland shrimp ponds in Thailand: implications for land and water salinization

2001 ◽  
Vol 28 (4) ◽  
pp. 357-367 ◽  
Author(s):  
Robert O. Braaten ◽  
Mark Flaherty
Keyword(s):  
Penaeus Monodon ◽  
Salt Content ◽  
Field Measurements ◽  
Farming System ◽  
Shrimp Farming ◽  
Salt Balance ◽  
Shrimp Ponds ◽  
Central Plain ◽  
Pond Sediment ◽  
Zero Discharge

Brackish water ponds for farming black tiger shrimp (Penaeus monodon) have recently proliferated in inland areas of Thailand's central plain, raising concerns about land and water salinization. The environmental impacts of inland shrimp farming were assessed by analysing the salt balance for an inland shrimp farm. Field data on water fluxes and pond salinity, collected from nine ponds in Chachoengsao Province from May–July 1999, were used to model the salt balance for a typical shrimp pond over one growout cycle. During growout, seepage represented 38% (11.5 tonnes crop−1) of salt losses, pond discharge 33% (9.7 tonnes crop−1), and accumulation of salt in pond sediment 6% (1.8 tonnes crop−1). About 23% of the initial salt content remained at harvest and could have been recycled. However, the majority (84% on average) was discharged to the irrigation canals. Much of the salt in pond sediment was also exported to the canal system through tidal flushing of the ponds. Field measurements of salinity were taken in adjacent canals and rice paddies to explore the impacts of salt exports from shrimp ponds. Pond discharge caused increases in canal salinity above levels that would impact on yields of irrigated rice and orchard crops, the main land uses in the region. Elevated soil and water salinity in adjacent rice fields was probably related to lateral seepage from the ponds. The salt budget was also modelled for a zero discharge farming system, promoted by proponents of inland shrimp farming as having few impacts. However, the results suggest that, even in zero discharge ponds, almost half of the initial pond salt content is exported through seepage (45%, 12.4 tonnes crop−1), with another 6% (1.8 tonnes crop−1) deposited in sediments. While techniques exist for mitigating much of the salt leakage, the likelihood of their uptake in Thailand is low. Further expansion of inland shrimp farming in the central plain is therefore likely to contribute substantial salt load to the area's land and water resources.

scholarly journals Technical Efficiency and Output Losses in Shrimp Farming: A Case in Mekong Delta, Vietnam

Fishes ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 59
Author(s):  
Keo Sa Rate Thach ◽  
Hong Tu Vo ◽  
Ji-Yong Lee
Keyword(s):  
Technical Efficiency ◽  
Stochastic Frontier ◽  
Mekong Delta ◽  
Shrimp Farming ◽  
Primary Data ◽  
Traditional Group ◽  
Black Tiger Shrimp ◽  
Tiger Shrimp ◽  
Average Loss ◽  
Study Sites

The conversion from black tiger shrimp farming and crop farming to white leg shrimp production is widespread in Vietnam’s Mekong Delta provinces. However, this conversion trend also contains many risks related to the technical aspects of the production process. The study mainly aims to estimate the technical efficiency of white leg shrimp farming. It also compares the technical efficiency of white leg shrimp farming between the traditional group that historically has cultivated white leg shrimp and the group that recently converted from black tiger shrimp and crops to white leg shrimp, in order to evaluate the efficiency and adaptability of shrimp farming. Primary data were collected by directly interviewing 99 farmers in traditional areas and 101 farmers in recently converted areas in the study sites and analyzed by using the stochastic frontier method. The calculated technical efficiency was around 72.9 percent, suggesting that farmers could increase their output level by about 27.1%, given constant inputs. There was no difference in the technical efficiency of the two groups, indicating that the converted farms have sufficient adaptability when switching to white leg shrimp farming. The output loss in farmers’ production is still very high, with an average loss of 1973 kg/hectare.

Shrimp-mangrove integrated farming system in the Mekong Delta, Vietnam.

2020 ◽  
Author(s):  
Ngoc Hai Tran
Keyword(s):  
Central Government ◽  
Mekong Delta ◽  
Farming Systems ◽  
Buffer Zone ◽  
Farming System ◽  
Shrimp Farming ◽  
Shrimp Culture ◽  
System P ◽  
Blood Cockle ◽  
Aquaculture Production

Abstract The integrated shrimp-mangrove system is one of the most important farming systems in the Mekong Delta, especially in the buffer zone of Ca Mau province, Vietnam. According to Decision No. 116/1999/QD-TTg of the Vietnam Central Government, farms could use up to 40% of the total area of the buffer zone along the coast for aquaculture, with 60% reserved for mangrove plantation and environmental protection. Currently the mangrove-shrimp farming system in Ca Mau occupies a total area of 47,500 ha, of which ponds (ditches) cover about 19,000 ha. Shrimp culture is based mainly on improved extensive methods that give productivities in the range of 200-400 kg ha-1 yr-1. In addition to shrimps, several other species such as mud crab, fish, and blood cockle are also stocked to diversify aquaculture production and ensure regular incomes. With newly issued policies and regulations for shrimp-mangrove farming systems, new opportunities are being created for further improvement and development of the system.

scholarly journals ANTIBIOTICS AND PESTICIDES IN WATER AND SEDIMENTS FROM INTENSIVE SHRIMP FARMS IN SOUTHERN VIETNAM

2018 ◽  
Vol 54 (4B) ◽  
pp. 146
Author(s):  
Nguyen Truong An
Keyword(s):  
Mekong Delta ◽  
Shrimp Farming ◽  
Organic Chemical ◽  
Production Cycle ◽  
Shrimp Ponds ◽  
Low Concentrations ◽  
Pesticides In Water ◽  
Shrimp Industry ◽  
Negative Impacts ◽  
Shrimp Farms

In recent years, shrimp farming has developed rapidly and become one of the major export sectors of Vietnam. In particular, Mekong Delta Vietnam (MDVN) accounts for over 90 % shrimp farming area in Vietnam. Shrimp industry development leads to use a large amount of antibiotics (ABs) and pesticides for disease prevention, treatment and sanitation pond. These compounds are usually discharged directly into the environment through water and sludge after harvesting. The presence of antibiotics and pesticides in the environment cause negative impacts on ecosystems and human health. In this study, the passive sampling method with POCIS sampler (Polar Organic Chemical Integrative Samplers) was used to monitor the presence of 12 ABs and 2 pesticides in water of intensive shrimp ponds and the surrounding canals at Tan Tru District (Long An province) and Can Gio District (Ho Chi Minh city) following a production cycle. The results showed that ABs and pesticides were detected in water and sediment in the pond and canals in both research sites. Two pesticides (atrazine and diuron) were detected in the pond and leading canals in both study areas with low concentrations from several ng/L to several tens of ng/L. In Tan Tru, three antibiotics (Trimethoprim, Sulfamethoxazole and Enrofloxacin) were detected in water at concentrations ranging from several tens of ng/L to 300 ng/L; in sediments of shrimp pond and canal the levels of pesticides and ABs ranged from 10 to 200 µg/kg. In Can Gio - HCMC, 4 ABs (Trimethoprim, Sulfamethoxazole, Ciprofloxacin and Enrofloxacin) were detected ranging from a few ng/L to several µg/L in water, and a few mg/kg in sediments of the pond. The results also showed that in the pond, ABs type and concentration detection varied by region and shrimp growth cycles.

Shrimp farming systems in Hai Phong, Vietnam.

2020 ◽  
Author(s):  
Dao Huy Giap
Keyword(s):  
Penaeus Monodon ◽  
Farming Systems ◽  
Southwest Monsoon ◽  
Climatic Conditions ◽  
Shrimp Farming ◽  
Scylla Serrata ◽  
Northeast Monsoon ◽  
Shrimp Culture ◽  
Black Tiger Shrimp ◽  
Tiger Shrimp

Abstract Hai Phong province is one of the main shrimp culture areas in north Vietnam. Its climate is influenced by two monsoon regimes. The April-September southwest monsoon is wet and hot, and the temperature is suitable for shrimp culture. The October-March northeast monsoon is dry and cold, and the temperature is not suitable for shrimp culture. Different shrimp farming systems take place along the entire coast depending on socio-economic and climatic conditions, seed availability, and farming methods to minimize the operating risk. The main cultured species in Hai Phong is black tiger shrimp, Penaeus monodon. The shrimp are either cultured in monoculture or integrated or cultured alternatively with mud crab (Scylla serrata), greasyback shrimp (Metapenaeus ensis)and seaweeds (Gracilaria gracilis and G. blodgettii). The main crop of black tiger shrimp is from April to September, when about 15% of farms practice integrated shrimp-seaweed culture and 85% of farms practice shrimp monoculture. Additional crops of shrimp or mud crabs are cultured during other months from September to March, while seaweed production is integrated with shrimp or crabs all year. Thus, four main shrimp farming systems can be found in Hai Phong: Single-crop shrimp farming, double-crop shrimp farming, shrimp-crab rotation farming, and integrated shrimp-seaweed-crab farming.

scholarly journals STUDI KESESUAIAN LAHAN TAMBAK UDANG WINDU (PENAEUS MONODON) DI DESA OENSULI KECAMATAN KABANGKA KABUPATEN MUNA SULAWESI TENGGARA

2021 ◽  
Vol 13 (1) ◽  
pp. 141-150
Author(s):  
Trial Fiar Erawan
Keyword(s):  
Water Quality ◽  
Penaeus Monodon ◽  
Shrimp Farming ◽  
Limiting Factors ◽  
Eligibility Criteria ◽  
Shrimp Ponds ◽  
Land Quality ◽  
Tiger Shrimp ◽  
Measurement Results ◽  
Shrimp Farms

The success of tiger shrimp farming in Oensuli Village's fishponds will be achieved if its location meets the criteria for tiger shrimp farming. Therefore it is important to conduct this research to find out the level of suitability of the actual land of tiger shrimp farms that are managed with high, and low production in Oensuli Village, Muna Regency. The method used is to compare the measurement results or the results of data analysis with the eligibility criteria/land quality for tiger shrimp farming. The results of this study illustrate the suitability of the actual land of tiger shrimp ponds with high and low production, as well as on land that has not been converted to ponds, it is obtained that the class category is quite appropriate (S2a1.2h), which means that there are water quality limiting factors such as temperature and brightness, and different tides ebbs are too high.

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