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Nitrogen and phosphorous budgets for integrated culture of Litopenaeus vannamei with red sea algae Gracilaria corticata under zero water exchange system | ||
| Iranian Journal of Fisheries Sciences | ||
| مقاله 4، دوره 17، شماره 3، مهر 2018، صفحه 471-486 اصل مقاله (637.53 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22092/ijfs.2018.116382 | ||
| نویسندگان | ||
| Hojjatollah Fourooghifard* 1؛ Abbas Matinfar2؛ Mohammad Sediq Mortazavi1؛ Kiuomars Roohani Ghadikolaee1؛ Maryam Mirbakhsh3 | ||
| 1Persian Gulf and Oman Sea Ecology Research Center, Iranian Fisheries Sciecne Research Institute, Agricultural Research, Education and Extension Organization (AREEO) | ||
| 2Iranian Fisheries Sciecne Research Institute, Agricultural Research, Education and Extension Organization (AREEO) | ||
| 3Iran Shrimp Research Cente | ||
| چکیده | ||
| Abstract In this study, a 2×3 factorial design with two levels of shrimp density (25 and 50 shrimp per m-2) and three levels of red algae density (0, 200 and 400g per m-2) was applied to calculate nitrogen and phosphorous budgets in integrated culture of Litopenaeus vannamei with Gracilaria corticata during 45 days under zero water exchange system. Juvenile of L.vannamei (5.82 ± 0.11 g) and G.corticata were cultured in 18 round 1 m3 poly ethylene tanks. Water temperature, dissolved oxygen (DO), pH and salinity were measured each 3- day. Results indicated that shrimp density had a significant effect on pH and DO in the morning and in the afternoon. The algae density didn’t have a significant effect on pH and DO culturing tanks (p > 0.05). According to The results of this study, the main source of nitrogen and phosphorus input to the tanks during a 45- day culturing period was from feed. Shrimp and algae densities significantly affect the concentration of total ammonia, nitrite, nitrate and phosphate in water and an increase in shrimp density led to increase of these compounds whereas, increasing the algae density led to reduction of these compounds. Results indicated that increasing the density of G.corticata in all treatments, led to increase in biomass of harvested shrimp and the co-culture of G. corticata with L.vannamei decrease the amount of nitrogen and phosphorus in both water and sediments and improve the water quality of L.vannamei culture. | ||
| کلیدواژه‌ها | ||
| Nitrogen budget؛ phosphorous budget؛ Litopenaeus vannamei؛ GRACILARIA CORTICATA؛ zero water exchange | ||
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