Abstract
The objective of the present study was to implement and evaluate a semi-intensive Nile tilapia culture in a pond of 4, 900 m 2 serving with geothermal-water in a semi-arid region in the Central-North Plateau of Mexico. A total of 10,000 masculinized Nile tilapia (Oreochromis niloticus) fingerlings of 3.0±0.5 g of total body weight were introduced into the pond. The culture had duration of 10 months and during this time analysis of water quality, feeding and biometrical samples were realized and at the ending growth performance indicators were calculated. The results indicated that Nile tilapia at the end of the experiment reached a mean of 28 cm of total length and a mean of 360 g in total body weight, with a survival rate of 87%. The total yield obtained was of 6,000 kg/ha. This study demonstrated a high potential of Nile tilapia in semi-intensive culture in geothermal-waters ponds.
Highlights
The state of Aguascalientes is located at the NorthCentral Mexico Plateau, in a semi-arid region and has long been recognized by their abundance of “hot spots” of geothermal origin
The hot springs are usually utilized for curative purposes, animal and human consumption and agriculture; hot springs in Aguascalientes have been little employed in aquaculture activities
Most published papers mention that tilapia culture in tropical and subtropical areas is usually under warm waters, whose temperature is close to 25°C across the year
Summary
The state of Aguascalientes is located at the NorthCentral Mexico Plateau, in a semi-arid region and has long been recognized by their abundance of “hot spots” of geothermal origin. In the past several years, tilapia culture has been a fastest growing in the state, in spite of their semi-arid climatic conditions, which are inadequate to maintain a long growth-period of tilapia. For this reason, the tilapia producers in the state have implemented an expensive facility to keep water temperature above 25°C in the winter season. The tilapia producers in the state have implemented an expensive facility to keep water temperature above 25°C in the winter season This temperature has been achieved through the use of greenhouses or plastic domes. The benefit of a controlled rearing temperature in aquaculture operations can increase growth rates by 50 to 100% raising the number of harvest per year and reducing remarkably the growth fish period (Lienau, 1991)
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