Giant freshwater crayfish - Potential and difficult

Not too hard as black tiger shrimp, nor as demanding as white shrimp, giant freshwater shrimp can live well in both fresh and brackish areas. Not only that, giant freshwater shrimp can also be rotated, intercropped with rice or specialized farming are all good results. However, up to now, the giant freshwater shrimp has not been able to thrive like black tiger shrimp or vannamei right on the Mekong Delta.
The model of rice farming combined with giant freshwater shrimp farming has been implemented by many farmers in My Xuyen district.
After a period of over-exploitation with the boom of rice farming, the production of natural freshwater shrimp became less and less and, as with some other valuable aquatic species, the giant freshwater shrimp. The first was put into farming and development to this day. From just extensive farming on rice fields, the giant freshwater shrimp started to be cultivated in improved extensive form with all-male seed sources.
Evidence for the effectiveness of the all-male giant freshwater shrimp farming model, Mr. Vo Van Hoa, of Thanh Quoi commune (My Xuyen), one of the pioneering households in the giant freshwater shrimp farming model, said that despite profits from The giant freshwater shrimp is not as good as the black tiger shrimp or the black tiger shrimp, but it is less risky and helps me always say no to chemical pesticides. Thanks to that, when switching to organic rice in the first crop, it has achieved international certification.
Not too far away, in the case of giant freshwater shrimp farming in rice fields in 2018, most of the giant freshwater shrimp farmers in provinces: Soc Trang, Bac Lieu, Ca Mau and Kien Giang have the joy of winning the crop and winning the price. , when there was a time when the price of giant freshwater shrimp reached up to 230,000 VND / kg. According to farming households, even though the productivity of giant freshwater shrimp is not high, the giant freshwater shrimp is one of the subjects with high efficiency when cultivated intercropped with rice to increase profit for farmers compared to just one. pure rice.
According to estimates, if raising all male giant freshwater shrimp on an area of ​​1 ha, farmers can profit over 100 million after each crop. This is also considered as a promising species for the Mekong Delta in general and Soc Trang in particular in the context of climate change increasingly fierce because the blue shrimp can survive and grow well in heat. salinity from 24 - 34oC and salinity from 0 - 15 per thousand. Even the research results of the Research Institute for Aquaculture II and the Department of Fisheries of Can Tho University show that, at salinity of 5, 10, 15 per thousand, giant freshwater shrimp grow better and have The quality is better than it was at the salinity of 0 parts per thousand.
With the efficiency and favorable farming conditions, but the development of giant freshwater shrimp farming in the Mekong Delta up to now is not considered commensurate with the potential. One of the biggest obstacles to the development of giant freshwater shrimp farming models is the shortage of high-quality all-male shrimp breeds, long farming times, low stocking densities (leading to productivity. , output is not high) and especially the consumer market is mainly domestic, so prices are often precarious. Because of these barriers, the area and production of giant freshwater shrimp in the Mekong Delta is still low compared to some other cultured species, although the farming conditions are quite favorable.
Because most of the major forms of giant freshwater shrimp farming are intercropping according to the shrimp - rice model, the stocking density is only 1-2 shrimp / m2, so the average yield is only 200 - 500kg / ha, only a small area of ​​extensive farming improved by the male all-breed for a yield of 800 - 1,000kg / ha. On the other hand, due to low productivity, small and scattered farming scale, the production of crayfish is not much, making consumption at a time and place still difficult and uncertain prices. Another obstacle is that the supply of quality male all-breeds is still not much, making it difficult to expand the farming area and scale. Because of the above limitations, so although the rate of return on investment is quite high and low-risk, crayfish farming is still not attractive enough for farmers to participate.
According to the assessment of the National Agricultural Extension Center, the potential for developing giant freshwater shrimp farming in Vietnam is very large, concentrated mainly in the Mekong Delta provinces such as Ben Tre, Dong Thap, Tra Vinh and Ca Mau. , Bac Lieu, Soc Trang ... In 2018, the area of ​​farming giant freshwater shrimp in the Mekong Delta region accounted for about 3.24% of the total aquaculture area of ​​the whole region and according to the assessment of the Center for Agricultural Extension In addition, the area of ​​farming giant freshwater prawn may triple in the coming time thanks to the advantages: high adaptability, low disease, low investment cost, not too difficult technique and high efficiency. 3 - 5 times more than monoculture rice.
One of the key tasks and solutions for developing giant freshwater shrimp farming is set out in the national action plan for the development of Vietnam's shrimp industry up to 2025 is to review the planning and invest in improving the infrastructure of the farming area. concentrated in the Mekong Delta, producing quality and quality seed (2-3 billion seedlings by 2025). On the other hand, for the model of raising giant freshwater shrimp to bring higher efficiency, it is necessary to reorganize the production in the direction of cooperation and production chain linkage.
Updated on 23-12-2019
Soc Trang newspaper