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Abstract
ABSTRACTIt is generally believed that increasing feeding frequency has immediate benefits, including reduced nutrient leaching and increased shrimp growth. In this context, the aim this work was to evaluate the effect of feeding frequency in growth performance of Farfantepenaeus paulensis. Juveniles of Farfantepenaeus paulensis were grown for 30 days in pen enclosures, at a stocking density of 5 shrimp/m2. The shrimp were fed on feeding trays at a rate of 8% of their biomass per day, with treatments of one, two, three and four times per day, with four replicates each. The results showed no differences (5% probability) in biomass gain of F. paulensis when feed was offered two, three or four times per day. However, it was observed that the once a day frequency had a negative influence on weight gain for this species of shrimp. We conclude that the supply of food with 35% crude protein twice a day is sufficient for the growth of F paulensis. Feeding frequency of three or four times can provide increased spending in the cultivation of juveniles of this species.
Highlights
There is a need for research to provide information for the development of specific methodologies for raising native species that might have a higher commercial value, such as the pink shrimp Farfantepenaeus paulensis
With the aim of providing information to improve the feeding management in the culture of F. paulensis, we evaluated the effects of different frequencies of food offers on the growth performance of juvenile shrimp
For F. paulensis grown in pen enclosures, offering feed only once per day is not recommended compared to offering it two, three and four times per day, because, the results for survival were similar and the food conversion was higher, the consumption of feed was higher and the biomass increase and individual weight gain were smaller
Summary
There is a need for research to provide information for the development of specific methodologies for raising native species that might have a higher commercial value, such as the pink shrimp Farfantepenaeus paulensis. Several factors should be considered in order to develop appropriate feeding management of a shrimp farm. The efficiency of a given food depends largely on its being rapidly recognized and accepted (Costero and Meyers, 1993), because its nutrients leach out rapidly after being placed in the water (Cuzon et al, 1982). These considerations suggest that feed should be offered in several daily portions, so that the shrimp can use it more efficiently. With the aim of providing information to improve the feeding management in the culture of F. paulensis, we evaluated the effects of different frequencies of food offers on the growth performance of juvenile shrimp
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