Farmed shrimp are constantly threatened by infectious diseases. The increasing pressure on production demands high performance and efficiency that can only be achieved by eliminating or reducing the impact of pathogens. The timely detection of diseases is of great importance, so it is required to have a clear command of the advantages and disadvantages of different diagnostic techniques, in order to implement a rapid response to outbreaks that may occur. Obtaining a diagnosis will depend on various factors, including the early detection of clinical signs and the correct interpretation of the results. In this way, the selection of techniques that allow a preliminary approach to a health emergency and the confirmatory tests that will lead to the design of actions to be chosen. The aim of this paper was to present the advantages and disadvantages of the diagnostic techniques currently avail...

In this note, some bacterial pathologies with the capacity to injure the hepatopancreas of farmed marine shrimp are cited, as well as details of some of the monitoring techniques used for their study, emphasizing the fresh analysis. This technique is widely used in shrimp farms due to its low cost, minimum response time, short training time and practicality. The issue of the so-called «double wall» reported with some frequency by some analysts is addressed, presenting arguments to understand the possible origin of this artifact, and the impossibility of the formation of multiple walls in the tubules is supported with information. For this, the normal structure of the tubular epithelium of these animals is described, both in normal stages, as well as under pathological conditions.

Farmed shrimp are constantly threatened by infectious diseases. The increasing pressure on production demands high performance and efficiency that can only be achieved by eliminating or reducing the impact of pathogens. The timely detection of diseases is of great importance, so it is required to have a clear command of the advantages and disadvantages of different diagnostic techniques, in order to implement a rapid response to outbreaks that may occur. Obtaining a diagnosis will depend on various factors, including the early detection of clinical signs and the correct interpretation of the results. In this way, the selection of techniques that allow a preliminary approach to a health emergency and the confirmatory tests that will lead to the design of actions to be chosen. The aim of this paper was to present the advantages and disadvantages of the diagnostic techniques currently avail...

The aim of this study was to determine the productivity and profitability of fattening freshwater prawns cultivated in two stocking densities in ponds, applying a simple and appropriate technology for the transfer of knowledge to producers. The study was carried out in 2019 on a farm in the province of Limón, Costa Rica. The fattening stage was carried out using densities of 2.5 and 6.0 shrimp/m2. The productions obtained were 758.9 and 961.2 kg/ha, respectively (p<0.01). Assuming 2.7 cycles per year, the potential productivity would be 2049 and 2595 kg/ha/year, respectively. Variable production costs were higher at 6.0/m2 than at 2.5/m2 due to the increase in the purchase of more seeds and feeds. The cost of the seed represented 69% of the total investment in low stocking density and 77% in the highest. Farm sales revenue was higher at 6.0/m2 than at 2.5/m2. However, the most profit...

The aim of this study was to determine the productivity and profitability of fattening freshwater prawns cultivated in two stocking densities in ponds, applying a simple and appropriate technology for the transfer of knowledge to producers. The study was carried out in 2019 on a farm in the province of Limón, Costa Rica. The fattening stage was carried out using densities of 2.5 and 6.0 shrimp/m2. The productions obtained were 758.9 and 961.2 kg/ha, respectively (p<0.01). Assuming 2.7 cycles per year, the potential productivity would be 2049 and 2595 kg/ha/year, respectively. Variable production costs were higher at 6.0/m2 than at 2.5/m2 due to the increase in the purchase of more seeds and feeds. The cost of the seed represented 69% of the total investment in low stocking density and 77% in the highest. Farm sales revenue was higher at 6.0/m2 than at 2.5/m2. However, the most profit...