Parasitic infection among larvae and fingerlings of the Persian sturgeon (Acipenser persicus) in Vniro tanks and earthen ponds
This study was conducted in two phases on sturgeon larvae and fingerlings produced from artificial breeding of five pairs of the Persian sturgeon (Acipenser persicus) broodstocks in Shahid Beheshti Hatchery in spring and summer 2006. Initially, 600 larvae were collected on 3 post days hatching (pdh) and 5 days after the onset of exogenous feeding. The second phase was conducted with 450 specimens collected from five earthen ponds, which included 150 larvae collected one week after stocking, 150 fingerlings collected 20 days after stocking and 150 fingerlings collected at the time of their release into rivers. No parasite was observed in the sturgeon larvae on day 3 pdh and 5 days after the onset of exogenous feeding. However Trichodina reticulata were observed in the larvae in the first week (prevalence = 10 - 20%) and also in the fingerlings (prevalence = 10 - 46.67%) 20 days after they were transferred to the earthen ponds. At the time of their release into the river, in addition to T. reticulata (prevalence = 13.33 – 100%) a digenean trematode, Diplostomum spathaceum, (prevalence = 6.67 - 30%) was also observed in the sturgeon fingerlings. It is evident from the present study that Trichodina and Diplostomum infection occurs after fingerlings are released into the earthen ponds and gradually increases with the progress in the rearing period. Increase in prevalence of Trichodina infection through the rearing period can be explained by the increase in water temperature and increase in dissolved organic matter in the ponds which provide the desirable conditions for the propagation of this unicellular ciliate. Significant differences were observed in the mean intensity of T. reticulata infection in sturgeon fingerlings during different stages of rearing into earthen ponds (P<0.05).
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Language: | English |
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2010
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Subjects: | Biology, Fisheries, Acipenser persicus, Parasite, Larvae, Fingerling, Trichodina reticulata, Diplostomum spathaceum, Iran, |
Online Access: | http://hdl.handle.net/1834/37160 |
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dig-aquadocs-1834-371602021-07-04T04:00:59Z Parasitic infection among larvae and fingerlings of the Persian sturgeon (Acipenser persicus) in Vniro tanks and earthen ponds Bazari Moghaddam, S. Mokhayer, B. Masoumian, M. Shenavar Masouleh, A. Jalilpour, J. Masoumzadeh, M. Alizadeh, M. Biology Fisheries Acipenser persicus Parasite Larvae Fingerling Trichodina reticulata Diplostomum spathaceum Iran This study was conducted in two phases on sturgeon larvae and fingerlings produced from artificial breeding of five pairs of the Persian sturgeon (Acipenser persicus) broodstocks in Shahid Beheshti Hatchery in spring and summer 2006. Initially, 600 larvae were collected on 3 post days hatching (pdh) and 5 days after the onset of exogenous feeding. The second phase was conducted with 450 specimens collected from five earthen ponds, which included 150 larvae collected one week after stocking, 150 fingerlings collected 20 days after stocking and 150 fingerlings collected at the time of their release into rivers. No parasite was observed in the sturgeon larvae on day 3 pdh and 5 days after the onset of exogenous feeding. However Trichodina reticulata were observed in the larvae in the first week (prevalence = 10 - 20%) and also in the fingerlings (prevalence = 10 - 46.67%) 20 days after they were transferred to the earthen ponds. At the time of their release into the river, in addition to T. reticulata (prevalence = 13.33 – 100%) a digenean trematode, Diplostomum spathaceum, (prevalence = 6.67 - 30%) was also observed in the sturgeon fingerlings. It is evident from the present study that Trichodina and Diplostomum infection occurs after fingerlings are released into the earthen ponds and gradually increases with the progress in the rearing period. Increase in prevalence of Trichodina infection through the rearing period can be explained by the increase in water temperature and increase in dissolved organic matter in the ponds which provide the desirable conditions for the propagation of this unicellular ciliate. Significant differences were observed in the mean intensity of T. reticulata infection in sturgeon fingerlings during different stages of rearing into earthen ponds (P<0.05). 2021-06-24T18:03:59Z 2021-06-24T18:03:59Z 2010 article TRUE 1562-2916 http://hdl.handle.net/1834/37160 en http://www.ifro.ir application/pdf application/pdf 342-351 http://aquaticcommons.org/id/eprint/22380 18721 2018-04-01 19:33:20 22380 Iranian Fisheries Science Research Institute |
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Biology Fisheries Acipenser persicus Parasite Larvae Fingerling Trichodina reticulata Diplostomum spathaceum Iran Biology Fisheries Acipenser persicus Parasite Larvae Fingerling Trichodina reticulata Diplostomum spathaceum Iran |
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Biology Fisheries Acipenser persicus Parasite Larvae Fingerling Trichodina reticulata Diplostomum spathaceum Iran Biology Fisheries Acipenser persicus Parasite Larvae Fingerling Trichodina reticulata Diplostomum spathaceum Iran Bazari Moghaddam, S. Mokhayer, B. Masoumian, M. Shenavar Masouleh, A. Jalilpour, J. Masoumzadeh, M. Alizadeh, M. Parasitic infection among larvae and fingerlings of the Persian sturgeon (Acipenser persicus) in Vniro tanks and earthen ponds |
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This study was conducted in two phases on sturgeon larvae and fingerlings produced from artificial breeding of five pairs of the Persian sturgeon (Acipenser persicus) broodstocks in Shahid Beheshti Hatchery in spring and summer 2006. Initially, 600 larvae were collected on 3 post days hatching (pdh) and 5 days after the onset of exogenous feeding. The second phase was conducted with 450 specimens collected from five earthen ponds, which included 150 larvae collected one week after stocking, 150 fingerlings collected 20 days after stocking and 150 fingerlings collected at the time of their release into rivers. No parasite was observed in the sturgeon larvae on day 3 pdh and 5 days after the onset of exogenous feeding. However Trichodina reticulata were observed in the larvae in the first week (prevalence = 10 - 20%) and also in the fingerlings (prevalence = 10 - 46.67%) 20 days after they were transferred to the earthen ponds. At the time of their release into the river, in addition to T. reticulata (prevalence = 13.33 – 100%) a digenean trematode, Diplostomum spathaceum, (prevalence = 6.67 - 30%) was also observed in the sturgeon fingerlings. It is evident from the present study that Trichodina and Diplostomum infection occurs after fingerlings are released into the earthen ponds and gradually increases with the progress in the rearing period. Increase in prevalence of Trichodina infection through the rearing period can be explained by the increase in water temperature and increase in dissolved organic matter in the ponds which provide the desirable conditions for the propagation of this unicellular ciliate. Significant differences were observed in the mean intensity of T. reticulata infection in sturgeon fingerlings during different stages of rearing into earthen ponds (P<0.05). |
format |
article |
topic_facet |
Biology Fisheries Acipenser persicus Parasite Larvae Fingerling Trichodina reticulata Diplostomum spathaceum Iran |
author |
Bazari Moghaddam, S. Mokhayer, B. Masoumian, M. Shenavar Masouleh, A. Jalilpour, J. Masoumzadeh, M. Alizadeh, M. |
author_facet |
Bazari Moghaddam, S. Mokhayer, B. Masoumian, M. Shenavar Masouleh, A. Jalilpour, J. Masoumzadeh, M. Alizadeh, M. |
author_sort |
Bazari Moghaddam, S. |
title |
Parasitic infection among larvae and fingerlings of the Persian sturgeon (Acipenser persicus) in Vniro tanks and earthen ponds |
title_short |
Parasitic infection among larvae and fingerlings of the Persian sturgeon (Acipenser persicus) in Vniro tanks and earthen ponds |
title_full |
Parasitic infection among larvae and fingerlings of the Persian sturgeon (Acipenser persicus) in Vniro tanks and earthen ponds |
title_fullStr |
Parasitic infection among larvae and fingerlings of the Persian sturgeon (Acipenser persicus) in Vniro tanks and earthen ponds |
title_full_unstemmed |
Parasitic infection among larvae and fingerlings of the Persian sturgeon (Acipenser persicus) in Vniro tanks and earthen ponds |
title_sort |
parasitic infection among larvae and fingerlings of the persian sturgeon (acipenser persicus) in vniro tanks and earthen ponds |
publishDate |
2010 |
url |
http://hdl.handle.net/1834/37160 |
work_keys_str_mv |
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