Nitrogenous compounds and oxygen concentration as the key density dependent factors to optimize growth of beluga, Huso huso (Actinopterygii: Acipenseriformes: Acipenseridae), in circular fiberglass tanks
Background. Beluga, Huso huso, known also as the great sturgeon, is a valuable fish in terms of meat and caviar production. It has been implicated that intensive fish culture is a major culprit for deterioration of water quality through metabolic excretion of fish in the aquatic environment. The aim...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Pensoft Publishers
2011-12-01
|
| Series: | Acta Ichthyologica et Piscatoria |
| Subjects: | |
| Online Access: | https://aiep.pensoft.net/article/26255/download/pdf/ |
| _version_ | 1828213002552213504 |
|---|---|
| author | S. Rafatnezhad B. Falahatkar |
| author_facet | S. Rafatnezhad B. Falahatkar |
| author_sort | S. Rafatnezhad |
| collection | DOAJ |
| description | Background. Beluga, Huso huso, known also as the great sturgeon, is a valuable fish in terms of meat and caviar production. It has been implicated that intensive fish culture is a major culprit for deterioration of water quality through metabolic excretion of fish in the aquatic environment. The aims of this study were: to determine the effect of the stocking density on the water quality, to assess the effect of water quality changes on growth of beluga juveniles, and also to determine the optimum density for culture in fiberglass tanks. Materials and methods. Fish were randomly distributed into 15 tanks at 5 different densities including 1 kg · m–2 (3.90 kg m–3), 2 kg · m–2 (7.09 kg · m–3), 4 kg · m–2 (14.54 kg · m–3), 6 kg · m–2 (21.19 kg · m–3), and 8 kg · m–2 (28.64 kg · m–3) with 3 replicates. Specific growth rate (SGR), yield (Y), average daily growth (ADG), absolute weight gain (AWG), and relative weight gain (RWG) were calculated. Throughout the experiment, water quality parameters including ammonia (NH3), nitrite (NO2), nitrate (NO3) dissolved oxygen (DO), and oxygen saturation (OS) were also measured. Results. Stocking density considerably influences the growth of beluga juveniles and water quality during 56 days of rearing. DO, OS, NO2, NO3, and NH3 were significantly different among treatments. pH and temperature showed no significant effect under different stocking densities. NO2 and NO3 increased, while DO decrease as the stocking density of fish increased. At the end of the 56 days of rearing, all the growth parameters (final weight, total length, SGR, Y, ADG, AWG, and RWG) were significantly different among treatments. Survival was 100% in all of the rearing densities. Conclusion. Results of this study showed that the density of fish had a significant effect on water quality and a high density culture accompanied by intensive feeding may result in high concentrations of nitrogen compounds, and low concentrations of dissolved oxygen in the water of culture tanks. Each of the factors (increase nitrogenous compounds and decrease in oxygen) could suppress the growth of Huso huso juveniles. |
| first_indexed | 2024-04-12T14:44:36Z |
| format | Article |
| id | doaj.art-b0e82522c0cc4659af2fc013a0533074 |
| institution | Directory Open Access Journal |
| issn | 1734-1515 |
| language | English |
| last_indexed | 2024-04-12T14:44:36Z |
| publishDate | 2011-12-01 |
| publisher | Pensoft Publishers |
| record_format | Article |
| series | Acta Ichthyologica et Piscatoria |
| spelling | doaj.art-b0e82522c0cc4659af2fc013a05330742022-12-22T03:28:42ZengPensoft PublishersActa Ichthyologica et Piscatoria1734-15152011-12-0141428529110.3750/AIP2011.41.4.0426255Nitrogenous compounds and oxygen concentration as the key density dependent factors to optimize growth of beluga, Huso huso (Actinopterygii: Acipenseriformes: Acipenseridae), in circular fiberglass tanksS. RafatnezhadB. FalahatkarBackground. Beluga, Huso huso, known also as the great sturgeon, is a valuable fish in terms of meat and caviar production. It has been implicated that intensive fish culture is a major culprit for deterioration of water quality through metabolic excretion of fish in the aquatic environment. The aims of this study were: to determine the effect of the stocking density on the water quality, to assess the effect of water quality changes on growth of beluga juveniles, and also to determine the optimum density for culture in fiberglass tanks. Materials and methods. Fish were randomly distributed into 15 tanks at 5 different densities including 1 kg · m–2 (3.90 kg m–3), 2 kg · m–2 (7.09 kg · m–3), 4 kg · m–2 (14.54 kg · m–3), 6 kg · m–2 (21.19 kg · m–3), and 8 kg · m–2 (28.64 kg · m–3) with 3 replicates. Specific growth rate (SGR), yield (Y), average daily growth (ADG), absolute weight gain (AWG), and relative weight gain (RWG) were calculated. Throughout the experiment, water quality parameters including ammonia (NH3), nitrite (NO2), nitrate (NO3) dissolved oxygen (DO), and oxygen saturation (OS) were also measured. Results. Stocking density considerably influences the growth of beluga juveniles and water quality during 56 days of rearing. DO, OS, NO2, NO3, and NH3 were significantly different among treatments. pH and temperature showed no significant effect under different stocking densities. NO2 and NO3 increased, while DO decrease as the stocking density of fish increased. At the end of the 56 days of rearing, all the growth parameters (final weight, total length, SGR, Y, ADG, AWG, and RWG) were significantly different among treatments. Survival was 100% in all of the rearing densities. Conclusion. Results of this study showed that the density of fish had a significant effect on water quality and a high density culture accompanied by intensive feeding may result in high concentrations of nitrogen compounds, and low concentrations of dissolved oxygen in the water of culture tanks. Each of the factors (increase nitrogenous compounds and decrease in oxygen) could suppress the growth of Huso huso juveniles.https://aiep.pensoft.net/article/26255/download/pdf/stocking densitywater qualitygrowthammonia |
| spellingShingle | S. Rafatnezhad B. Falahatkar Nitrogenous compounds and oxygen concentration as the key density dependent factors to optimize growth of beluga, Huso huso (Actinopterygii: Acipenseriformes: Acipenseridae), in circular fiberglass tanks Acta Ichthyologica et Piscatoria stocking density water quality growth ammonia |
| title | Nitrogenous compounds and oxygen concentration as the key density dependent factors to optimize growth of beluga, Huso huso (Actinopterygii: Acipenseriformes: Acipenseridae), in circular fiberglass tanks |
| title_full | Nitrogenous compounds and oxygen concentration as the key density dependent factors to optimize growth of beluga, Huso huso (Actinopterygii: Acipenseriformes: Acipenseridae), in circular fiberglass tanks |
| title_fullStr | Nitrogenous compounds and oxygen concentration as the key density dependent factors to optimize growth of beluga, Huso huso (Actinopterygii: Acipenseriformes: Acipenseridae), in circular fiberglass tanks |
| title_full_unstemmed | Nitrogenous compounds and oxygen concentration as the key density dependent factors to optimize growth of beluga, Huso huso (Actinopterygii: Acipenseriformes: Acipenseridae), in circular fiberglass tanks |
| title_short | Nitrogenous compounds and oxygen concentration as the key density dependent factors to optimize growth of beluga, Huso huso (Actinopterygii: Acipenseriformes: Acipenseridae), in circular fiberglass tanks |
| title_sort | nitrogenous compounds and oxygen concentration as the key density dependent factors to optimize growth of beluga huso huso actinopterygii acipenseriformes acipenseridae in circular fiberglass tanks |
| topic | stocking density water quality growth ammonia |
| url | https://aiep.pensoft.net/article/26255/download/pdf/ |
| work_keys_str_mv | AT srafatnezhad nitrogenouscompoundsandoxygenconcentrationasthekeydensitydependentfactorstooptimizegrowthofbelugahusohusoactinopterygiiacipenseriformesacipenseridaeincircularfiberglasstanks AT bfalahatkar nitrogenouscompoundsandoxygenconcentrationasthekeydensitydependentfactorstooptimizegrowthofbelugahusohusoactinopterygiiacipenseriformesacipenseridaeincircularfiberglasstanks |