Growth and survival of juvenile of spotty pargy lutjanus guttatus, (steindachner, 1869), using different thickness of farming in tanks.

Crecimiento y Sobrevivencia de Juveniles de Pargo Lunarejo Lutjanus Guttatus, (Steindachner, 1869), Utilizando Diferentes Densidades de Cultivo en Tanques.

The spotty pargy Lutjannus guttatus is an important “íctico” resource in the Pacific Colombian; considering the need to advance in its technological aquatic offer, considered to evaluate the growth of juvenile of pargy to 3 thickness of sowing (30, 40 and 50 ind/m), cultivated in plastic circular tanks for 103 days at the Station Marina Bahía Málaga of Buenaventura. Four hundred thirty two juvenile ones of 18-20 g of weight were distributed in nine tanks of 1, 2 m ³ of water. Three treatments presented ventilation and a daily spare of water of 100 %. The variables of water quality as: dissolved oxygen temperature and saltness were registered every day. The obtained results were: to thickness of 30/m3 a growth of 0,63 was obtained g/day, a nutritive conversion of 2,90, a final thickness 5,94 kg m‑3, and a final weight of 82,82g; to thickness of 40/m3, they grew to a valuation of 0,61 g/day, the nutritive conversion was 4,23, the final thickness was 6,87 kg m‑3 and the final weight 81,64 g; finally to the thickness of 50/m3, the fish grew to a valuation of 0,61 g/day, they had a nutritive conversion of 4.74, a final thickness of 3,97kg m‑3 and a final weight of 82,08 g; it ends on the kindness of the results and one raises that the spotty porgy can be cultivated in plastic tanks to high thickness of sowing.