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UTILIZAÇÃO DA OSTRA-DO-MANGUE, Crassostrea rhizophorae (GUILDING, 1828) E DA MACROALGA Hypnea musciformis (WULFEN) LAMOUROUX COMO BIOFILTROS EM SISTEMA DE POLICULTIVO COM O CAMARÃO MARINHO Litopenaeus vannamei (BOONE, 1931)
| Content Provider | Semantic Scholar |
|---|---|
| Author | Vasconcelos, Régis Fernandes Neto, Maximiano Pinheiro Dantas Sabry, Rachel Costa Gesteira, Tereza Cristina Vasconcelos |
| Copyright Year | 2008 |
| Abstract | Utilization of the mangrove oyster, Crassostrea rhizophorae (Guilding, 1828) and macroalga Hypnea musciformis (Wulfen) Lamouroux as biofilters in polyculture with the shrimp Litopenaeus vannamei (Boone, 1931) The oyster Crassostrea rhizophorae and the macroalga Hypnea musciformis were used in a polyculture system with Litopennaeus vannamei aiming to evaluate their efficiency as biofilters. The experiment was developed in six 500L fiber glass tanks and had two shrimp growout cycles. The following parameters were analyzed during the study period: total ammoniacal nitrogen, orthophosphate, biochemical oxygen demand (BOD) and total suspended solids (TSS). The six control tanks were managed with a density of 30 shrimps per tank in both growout cycles. In cycle I, in three experimental tanks the density rates of shrimps, oysters and algae per tank were 30 ind., 100 ind. and 1.0 kg, respectively; in cycle II, in three experimental tanks the density rates of shrimps, oysters and algae per tank were 30 ind., 60 ind. and 1.3 kg. The mean total ammoniacal nitrogen concentration in the experimental tanks presented a significant decrease of 20% in cycle I and 39.08% in cycle II. In cycle I, orthophosphate content was 14.33% higher in the experimental tanks, while in cycle II it did not show significant variation. The BOD presented a significant decrease of 9.66% and 10.06% in the experimental tanks during cycles I and II, respectively. The TSS concentration in experimental tanks showed a decrease of 49.89% during cycle I and 20.79% in cycle II. Shrimp mortality was higher in control tanks in both cycles. The results demonstrate that oysters and macroalgae utilization can improve water quality in shrimp ponds, yet additional studies on the farming environment are required in order to confirm the obtained data. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.icmbio.gov.br/cepene/images/stories/publicacoes/btc/vol14b/ART04-V14b.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
