Journal de gestion des zones côtières

Abstrait

Experimental Studies on Shrimp- Gracillaria Polyculture System Effects of Gracillaria Density on Shrimp Sizes, Production, Survival and Growth Rate Efficiency in Carbon Energy Conversion into Harvestable Products among Gracillaria Density

Munifatul Izzati, N .R. Nganro and N. Widyorini

This experiments was conducted as response to the serious negative impact of shrimp aquacultres
into the environment. The shrimp-Gracillaria polyculture system was hypothesized to reduce excess pollutant
in the shrimp pond. Variation in Gracillaria density was used as treatments. Two important aspects are
discussed in this paper, that are the effect on shrimp productivity and efficiency in carbon energy conversion
into harvestable products. There were significant evidences that the shrimp-Gracllaria polyculture system
increase the sizes, total biomass, survival and growth rate of shrimp. The density of Gracillaria was positively
correlated with all of those parameters. The carbon energy conversion was also significantly affected by
Gracillaria density. The carbon energy conversion into harvestable products was more efficient if Gracillaria
density was increased.