The cause of the abnormal death of farmed sea crabs in Ca Mau has been found. It is caused by adult proboscis and larvae of various parasites in the body cavity of sea crabs.
On March 25, the Department of Agriculture and Rural Development of Ca Mau province said that it had found the cause of the sudden death of many households in the area.
Accordingly, the unusual deaths of crabs in the area recently were caused by adult juveniles and larvae of the parasites in the body cavity of the crabs… The infection rate was up to 93. .1%, the highest infection density was 17 parasites/crab.
Besides, bacteria V. parahaemolyticus is the second opportunistic agent present in the culture water, muscle and liver of crabs with a high density >1,000 CFU/ml/(gram) and is a potential pathogen for crabs. aquaculture and the risk of causing disease to aquatic animals reared in the same environment.
Specifically, the extent of damage up to this point in Dam Doi district is about 16,606 hectares out of 9,983 households, the level of damage is from 10-70%; Nam Can district about 13,128 ha/ 4,386 households, the level of damage is 30-100%; Cai Nuoc district has a damage level of about 165.6ha/104 households; Ngoc Hien district has about 200 hectares, in two communes, Vien An Dong and Tan An Tay, the damage level is 50-100%.
In order to minimize the damage, the Department of Agriculture and Rural Development of Ca Mau province has come up with many solutions to guide farmers, and proposed the Provincial People’s Committee to consider providing funding for disease prevention and treatment. dead crabs as well as proposing the Ministry of Agriculture and Rural Development to direct specialized agencies to handle the disease on crabs.
As has been reported, recently, farmed sea crabs of people in the districts of Dam Doi, Nam Can and Ngoc Hien have died abnormally with a loss of 30-100%. Since then, the Chairman of the Ca Mau Provincial People’s Committee has directed the relevant departments and agencies to urgently check, review and determine the cause of the death of farmed crabs.