GROWTH AND SURVIVAL RATES, MEAN WEIGHT, FOOD CONVERSION RATIO AND TOTAL HARVEST IN CULTURED SHRIMP LITOPENAEUS VANNAMEI IN IRAN
To introduce Litopenaeus vannamei to Iran as a cultured shrimp species, a experimental study was carried out to assess the effects of different stocking densities on growth rate, mean weight, survival rate, food conversion ratio and the total harvest of l. vannamei. Three postlarval groups (PLI2) of...
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| Format: | Article |
| Language: | fas |
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Iranian Fisheries Research Organization
2008-01-01
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| Series: | Majallah-i ̒Ilmī-i Shīlāt-i Īrān |
| Subjects: | |
| Online Access: | http://isfj.areo.ir/article_115332_en.html |
| _version_ | 1818470039838261248 |
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| author | M. Afsharnasab; A. Matinfar; M. Mohmmadi dost; A. Ghavampor; R. Seyed mortezaei; S. Sabzalizadeh; M. Khalilpazir; Gh. Faghih; M. Haghnejat; Sh. Ghasemi |
| author_facet | M. Afsharnasab; A. Matinfar; M. Mohmmadi dost; A. Ghavampor; R. Seyed mortezaei; S. Sabzalizadeh; M. Khalilpazir; Gh. Faghih; M. Haghnejat; Sh. Ghasemi |
| author_sort | M. Afsharnasab; A. Matinfar; M. Mohmmadi dost; A. Ghavampor; R. Seyed mortezaei; S. Sabzalizadeh; M. Khalilpazir; Gh. Faghih; M. Haghnejat; Sh. Ghasemi |
| collection | DOAJ |
| description | To introduce Litopenaeus vannamei to Iran as a cultured shrimp species, a experimental study was carried out to assess the effects of different stocking densities on growth rate, mean weight, survival rate, food conversion ratio and the total harvest of l. vannamei. Three postlarval groups (PLI2) of L. vannamei (pond A: 20 PL/m2 , pond B: 30 PL/m2 and pond C: 50 PL/m2) with average size 0.9cm and initial mean weight 0.01±0.005g were used in this study. The experiments were carried out in three replications in 9 earthen ponds each half a hectare in size in Khouzestan province, south of Iran during 110 days. The result showed there was no significant correlation (P>0.05) between stocking density and survival rate in the semi intensive culture condition. Mean survival rate among farms were greatest at the lowest density, where mean survival in pond A, B, and C was 88.6%, 83.3%, 73.3%, respectively but the differences were not significant (P>0.05). The results also showed there was no significant relationship (P>0.05) between growth rate and growth days in each experiment. The mean growth rate/days for ponds A, B, and C were calculated at 0.16g/day, O.l6g/day and 0.15g/day, respectively. The food conversion ratio in the end of the study period for ponds A, B and C was 1.01, 1.17 and 1.2, respectively. Shrimp production increased with an increase in stocking density when farm production at Pond A and B indicated a significant difference (P<0.05) compared to that of the pond C. The total shrimp production for ponds A, B and C was calculated at 2803kg/ha, 3146kg/ha and 3972kg/ha, respectively. The water temperature ranged between 28±3oC to 23±3oC, with the highest in July and lowest in September. Salinity ranged between 25±2ppt to 12±3ppt, pH ranged between 8.6±0.2 to 7.5±0.4 and dissolved oxygen ranged between 5.8±0.4ppm to 5.3±0.3ppm throughout the study. The study proved that L. vanname; could adapt to common conditions in Iranian shrimp culture environment and also we showed that the species production was higher than the native species already under culture. |
| first_indexed | 2024-04-13T21:32:31Z |
| format | Article |
| id | doaj.art-9459e43c00234eb5bda17dad7b897c76 |
| institution | Directory Open Access Journal |
| issn | 1026-1354 2322-5998 |
| language | fas |
| last_indexed | 2024-04-13T21:32:31Z |
| publishDate | 2008-01-01 |
| publisher | Iranian Fisheries Research Organization |
| record_format | Article |
| series | Majallah-i ̒Ilmī-i Shīlāt-i Īrān |
| spelling | doaj.art-9459e43c00234eb5bda17dad7b897c762022-12-22T02:29:06ZfasIranian Fisheries Research OrganizationMajallah-i ̒Ilmī-i Shīlāt-i Īrān1026-13542322-59982008-01-011731522GROWTH AND SURVIVAL RATES, MEAN WEIGHT, FOOD CONVERSION RATIO AND TOTAL HARVEST IN CULTURED SHRIMP LITOPENAEUS VANNAMEI IN IRANM. Afsharnasab; A. Matinfar; M. Mohmmadi dost; A. Ghavampor; R. Seyed mortezaei; S. Sabzalizadeh; M. Khalilpazir; Gh. Faghih; M. Haghnejat; Sh. GhasemiTo introduce Litopenaeus vannamei to Iran as a cultured shrimp species, a experimental study was carried out to assess the effects of different stocking densities on growth rate, mean weight, survival rate, food conversion ratio and the total harvest of l. vannamei. Three postlarval groups (PLI2) of L. vannamei (pond A: 20 PL/m2 , pond B: 30 PL/m2 and pond C: 50 PL/m2) with average size 0.9cm and initial mean weight 0.01±0.005g were used in this study. The experiments were carried out in three replications in 9 earthen ponds each half a hectare in size in Khouzestan province, south of Iran during 110 days. The result showed there was no significant correlation (P>0.05) between stocking density and survival rate in the semi intensive culture condition. Mean survival rate among farms were greatest at the lowest density, where mean survival in pond A, B, and C was 88.6%, 83.3%, 73.3%, respectively but the differences were not significant (P>0.05). The results also showed there was no significant relationship (P>0.05) between growth rate and growth days in each experiment. The mean growth rate/days for ponds A, B, and C were calculated at 0.16g/day, O.l6g/day and 0.15g/day, respectively. The food conversion ratio in the end of the study period for ponds A, B and C was 1.01, 1.17 and 1.2, respectively. Shrimp production increased with an increase in stocking density when farm production at Pond A and B indicated a significant difference (P<0.05) compared to that of the pond C. The total shrimp production for ponds A, B and C was calculated at 2803kg/ha, 3146kg/ha and 3972kg/ha, respectively. The water temperature ranged between 28±3oC to 23±3oC, with the highest in July and lowest in September. Salinity ranged between 25±2ppt to 12±3ppt, pH ranged between 8.6±0.2 to 7.5±0.4 and dissolved oxygen ranged between 5.8±0.4ppm to 5.3±0.3ppm throughout the study. The study proved that L. vanname; could adapt to common conditions in Iranian shrimp culture environment and also we showed that the species production was higher than the native species already under culture.http://isfj.areo.ir/article_115332_en.htmlLitopenaeus vannamei; GROWTH FACTORS; Iran |
| spellingShingle | M. Afsharnasab; A. Matinfar; M. Mohmmadi dost; A. Ghavampor; R. Seyed mortezaei; S. Sabzalizadeh; M. Khalilpazir; Gh. Faghih; M. Haghnejat; Sh. Ghasemi GROWTH AND SURVIVAL RATES, MEAN WEIGHT, FOOD CONVERSION RATIO AND TOTAL HARVEST IN CULTURED SHRIMP LITOPENAEUS VANNAMEI IN IRAN Majallah-i ̒Ilmī-i Shīlāt-i Īrān Litopenaeus vannamei; GROWTH FACTORS; Iran |
| title | GROWTH AND SURVIVAL RATES, MEAN WEIGHT, FOOD CONVERSION RATIO AND TOTAL HARVEST IN CULTURED SHRIMP LITOPENAEUS VANNAMEI IN IRAN |
| title_full | GROWTH AND SURVIVAL RATES, MEAN WEIGHT, FOOD CONVERSION RATIO AND TOTAL HARVEST IN CULTURED SHRIMP LITOPENAEUS VANNAMEI IN IRAN |
| title_fullStr | GROWTH AND SURVIVAL RATES, MEAN WEIGHT, FOOD CONVERSION RATIO AND TOTAL HARVEST IN CULTURED SHRIMP LITOPENAEUS VANNAMEI IN IRAN |
| title_full_unstemmed | GROWTH AND SURVIVAL RATES, MEAN WEIGHT, FOOD CONVERSION RATIO AND TOTAL HARVEST IN CULTURED SHRIMP LITOPENAEUS VANNAMEI IN IRAN |
| title_short | GROWTH AND SURVIVAL RATES, MEAN WEIGHT, FOOD CONVERSION RATIO AND TOTAL HARVEST IN CULTURED SHRIMP LITOPENAEUS VANNAMEI IN IRAN |
| title_sort | growth and survival rates mean weight food conversion ratio and total harvest in cultured shrimp litopenaeus vannamei in iran |
| topic | Litopenaeus vannamei; GROWTH FACTORS; Iran |
| url | http://isfj.areo.ir/article_115332_en.html |
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