Biofloc shrimp farming by Gamba Natural camp is considered a breakthrough in tropical shrimp farming technology in Europe, to facilitate the transport of fresh shrimps to the market under the premium segment.
Spain is one of the most important shrimp market, with imports of 150,000 tons / year. Only 2% of this is fresh shrimp, the rest is frozen shrimp is imported. Spaniards are the seafood diners and did not hesitate to pay more for fresh seafood products, high quality.
The construction of farm direct supply of fresh shrimp for the Spanish market remains a major challenge. Biofloc shrimp farming technology was developed Aquacop in Tahiti, French Polynesia from 1980. Recently, many scientists around the world have improved the technology and opens up the opportunity to produce large quantities of shrimp production in the area limiting the farming area.
Natural Gamba is a shrimp farm using technology Biofloc with no water exchange system in the entire production cycle. The water is re-used after the end of the harvest to remove nitrogen gas before recovery of water for new farming cycle. “We started 8 years ago shrimp and after 4 years of success. We assure farm technology Biofloc reuse system is 100% water.”, said farm manager.
Project construction began in 2007 Gamba under the direction of cooperation of the French Technical Director, Mr. Manuel Poulain. For reasons of biosecurity, the managers decided to build farms and 400 kilometers from the sea near the city of Campo del Nedina. The city is an important bridge to Madrid – the market’s largest shrimp consumption Spain and the north of Spain – where the demand for giant fresh shrimp.
Advantages which poses many challenges as well. Situated at a height of over 700 meters sea level, far from the sea, so the supply of salt water for farms difficult. Besides, the atmospheric temperature for type farms also irrelevant. From December to February, the air temperature ranges from 9 to 100C. Managers have solved the supply problem by using salt water sea water reconstituted from sea salt. The entire farm needs 5.5 million liters of artificial sea salt; was built in-house to create an environment isolated and closed culture. Technology Biofloc not exchange a large amount of water has reduced demand for energy to heat up water. The initial temperature of the water is increased and maintained at 280C.
Using artificial seawater requires costly. Spanish law and European prohibit direct discharge of used water into the environment. Therefore, the construction of water treatment systems ensure 100% recycled for the next production cycle is essential. Evaporation of water during feeding at a low level and at least 5 years before to add water to the entire camp.
Each tank is covered by a separate promotion to ensure biosafety highest level, limiting evaporation, heat and maintain temperature at ± 10C. 20 commercial shrimp tanks equipped ventilation system to maintain large amounts of dissolved oxygen and water transport regularly to maintain the solids in suspension in order to create a healthy Biofloc.
The tank is placed in the dark areas, in order to create a healthy and sustainable Biofloc. In the conventional tank outdoor Biofloc, bacteria will compete with the algae but algae is unstable because of changes in weather and sunlight conditions. In Gamba Natural farms, this problem has been fixed. “Based on the experience of Biofloc in Mexico, Seychelles and Australia, Poulain believes that the best system is the system Biofloc closed and no algae.
Gamba imported white shrimp larvae Pacific from Florida, USA, to comply with the strict rules of the EU management of biosecurity and management of exotic breeds. PL12 shrimp larvae are stocked at densities 350-1000 PL / m2. Not the entire production cycle of water exchange. Clean water is added as necessary in case of water evaporation. Shrimp were fed 30% crude protein, as mills animal feed producers in Europe offers. Biofloc system, floc should only eat shrimp feed conversion ratio is 1. So far, the farm has not recorded any cases of the disease. Shrimp average weight gain of 20 g after 120 days with a yield of 3 – 3.5kg / m3.