NILE TILAPIA NURSERY IN A BIOFLOC SYSTEM: EVALUATION OF DIFFERENT STOCKING DENSITIES
This trial aimed to evaluate the growth performance and hematological parameters of Nile tilapia (Oreochromis niloticus) GIFT strain during nursery using different stock densities in a biofloc system. The experiment was conducted in circular tanks (400 L) with sexually reversed fish, weighing 6.74...
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Instituto de Pesca
2020-10-01
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| Series: | Boletim do Instituto de Pesca |
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| Online Access: | https://institutodepesca.org/index.php/bip/article/view/1501 |
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| author | Luiz Rodrigo Mota VICENTE Marco Shizuo OWATARI José Luis Pedreira MOURIÑO Bruno Corrêa SILVA Felipe do Nascimento VIEIRA |
| author_facet | Luiz Rodrigo Mota VICENTE Marco Shizuo OWATARI José Luis Pedreira MOURIÑO Bruno Corrêa SILVA Felipe do Nascimento VIEIRA |
| author_sort | Luiz Rodrigo Mota VICENTE |
| collection | DOAJ |
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This trial aimed to evaluate the growth performance and hematological parameters of Nile tilapia (Oreochromis niloticus) GIFT strain during nursery using different stock densities in a biofloc system. The experiment was conducted in circular tanks (400 L) with sexually reversed fish, weighing 6.74 ± 0.37 g, over a period of 35 days. Five treatments with three replicates each were used in a completely randomized design. The treatments were as follows: T1 (200 fishes m-3); T2 (300 fishes m-3); T3 (400 fishes m-3); T4 (500 fishes m-3), and T5 (600 fishes m-3). The fishes were fed four times a day, following a feed table for this species, with adjustments according to fish biomass. The water quality parameters total ammoniacal nitrogen, and unionized ammonia showed a significant difference (p<0.05) between the treatments with lower (T1) and higher stocking densities (T4, T5). Alkalinity was significantly higher in treatments with higher densities (T4 and T5). For hematological parameters, the number of thrombocytes was higher in T5. Hemoglobin concentration was significantly lower in T5 than in T3. The best productive indexes were found in T4, presenting final biomass of 9915.16 ± 14.80 g m-3, apparent feed conversion rate of 1.11 ± 0.02, mean survival of 95.75 ± 0.75%, and daily mean weight gain of 0.43 ± 0.07 g. Overall, the Nile tilapia nursery in a biofloc system showed higher individual growth at densities up to 300 fishes m-3 and increased stocking density up to 500 fishes m-3.
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| format | Article |
| id | doaj-art-34c66aeae7dd4dc7bea96e551a70e5fa |
| institution | OA Journals |
| issn | 1678-2305 |
| language | English |
| publishDate | 2020-10-01 |
| publisher | Instituto de Pesca |
| record_format | Article |
| series | Boletim do Instituto de Pesca |
| spelling | doaj-art-34c66aeae7dd4dc7bea96e551a70e5fa2025-08-20T02:01:45ZengInstituto de PescaBoletim do Instituto de Pesca1678-23052020-10-01462NILE TILAPIA NURSERY IN A BIOFLOC SYSTEM: EVALUATION OF DIFFERENT STOCKING DENSITIESLuiz Rodrigo Mota VICENTE0Marco Shizuo OWATARI1José Luis Pedreira MOURIÑO2Bruno Corrêa SILVA3Felipe do Nascimento VIEIRA4Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina - EPAGRIUniversidade Federal de Santa Catarina - UFSC; Departamento de Aquicultura; Laboratório de Saúde de Organismos Aquáticos - AQUOSUniversidade Federal de Santa Catarina - UFSC; Departamento de Aquicultura; Laboratório de Saúde de Organismos Aquáticos - AQUOSEmpresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina - EPAGRIUniversidade Federal de Santa Catarina - UFSC; Departamento de Aquicultura; Laboratório de Camaríµes Marinhos - LCM This trial aimed to evaluate the growth performance and hematological parameters of Nile tilapia (Oreochromis niloticus) GIFT strain during nursery using different stock densities in a biofloc system. The experiment was conducted in circular tanks (400 L) with sexually reversed fish, weighing 6.74 ± 0.37 g, over a period of 35 days. Five treatments with three replicates each were used in a completely randomized design. The treatments were as follows: T1 (200 fishes m-3); T2 (300 fishes m-3); T3 (400 fishes m-3); T4 (500 fishes m-3), and T5 (600 fishes m-3). The fishes were fed four times a day, following a feed table for this species, with adjustments according to fish biomass. The water quality parameters total ammoniacal nitrogen, and unionized ammonia showed a significant difference (p<0.05) between the treatments with lower (T1) and higher stocking densities (T4, T5). Alkalinity was significantly higher in treatments with higher densities (T4 and T5). For hematological parameters, the number of thrombocytes was higher in T5. Hemoglobin concentration was significantly lower in T5 than in T3. The best productive indexes were found in T4, presenting final biomass of 9915.16 ± 14.80 g m-3, apparent feed conversion rate of 1.11 ± 0.02, mean survival of 95.75 ± 0.75%, and daily mean weight gain of 0.43 ± 0.07 g. Overall, the Nile tilapia nursery in a biofloc system showed higher individual growth at densities up to 300 fishes m-3 and increased stocking density up to 500 fishes m-3. https://institutodepesca.org/index.php/bip/article/view/1501Oreochromis niloticus, hematology, super-intensive system, BFT |
| spellingShingle | Luiz Rodrigo Mota VICENTE Marco Shizuo OWATARI José Luis Pedreira MOURIÑO Bruno Corrêa SILVA Felipe do Nascimento VIEIRA NILE TILAPIA NURSERY IN A BIOFLOC SYSTEM: EVALUATION OF DIFFERENT STOCKING DENSITIES Boletim do Instituto de Pesca Oreochromis niloticus, hematology, super-intensive system, BFT |
| title | NILE TILAPIA NURSERY IN A BIOFLOC SYSTEM: EVALUATION OF DIFFERENT STOCKING DENSITIES |
| title_full | NILE TILAPIA NURSERY IN A BIOFLOC SYSTEM: EVALUATION OF DIFFERENT STOCKING DENSITIES |
| title_fullStr | NILE TILAPIA NURSERY IN A BIOFLOC SYSTEM: EVALUATION OF DIFFERENT STOCKING DENSITIES |
| title_full_unstemmed | NILE TILAPIA NURSERY IN A BIOFLOC SYSTEM: EVALUATION OF DIFFERENT STOCKING DENSITIES |
| title_short | NILE TILAPIA NURSERY IN A BIOFLOC SYSTEM: EVALUATION OF DIFFERENT STOCKING DENSITIES |
| title_sort | nile tilapia nursery in a biofloc system evaluation of different stocking densities |
| topic | Oreochromis niloticus, hematology, super-intensive system, BFT |
| url | https://institutodepesca.org/index.php/bip/article/view/1501 |
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