Produção fotossintética da macroalga ULVA LACTUCA LINNAEUS (CHLOROPHYCEAE) cultivada em efluentes de uma fazenda de camarões marinhos

Abstract

Alencar, J. R.; Horta Junior, P. A. & Celino, J. J. 2010. Photosynthetic production of the macroalgae Ulva lactuca Linnaeus (Chlorophyceae) cultivated in wastewater from a shrimp marine farm. Braz. J. Aquat. Sci. Technol. 14(2):55-62. ISSN 1808-7035. In order to assess the demand for oxygen by photosynthetic production of the macroalgae Ulva lactuca grown in effluent from a shrimp farm and point out the potential growth of this species integrated closed recirculation systems, specimens were collected in Lagoa da Conceição - Florianópolis (SC), Brazil - and transported to the laboratory to check the stems. The experiment used four treatments with seaweed and algae with no one, with the following densities of algal material: 1 = 1 g L-1, 2 = 2 g L-1, 3 = 3g L-1 and 4 = 4 g L-1. Supersaturation of oxygen generated by photosynthetic activity of macroalgae far surpassed the rate of breathing. Lower densities between 1 and 2 gL-1, and provide high levels of oxygen during the day, consume proportionally little above the gas at night, favoring the maintenance of the stems and represent a great potential for integrated cultivation to shrimp farming in marine recirculation system, since that is situated in a basin of stabilization.