Changes in gill histology and mortality rate of juvenile Caspian Sea Brown Trout (Salmo trutta caspius Kessler, 1877) in different weights and water salinities
Changes in gill histology and mortality rate of juvenile Caspian Sea Brown Trout Salmo trutta caspius Kessler-1877 in different weights and water salinities were studied. The indicators used in this study were the change in number and size of gill chloride cells as well as mortality rate of the juvenile trout. Juveniles weighing 2, 5, 10, 15 and 20 grams were directly transferred into water with salinities of 0, 4, 8 and 12.5 gr/lit and kept for 120 hours. Histological assessment showed that the number of gill chloride cells increases with the increase in weight and their size increases invisibly. Also, we found that the number of gill chloride cells is increased when salinity increases while the size of the cells undergoes an invisible downward trend. During the 120 hour test, mortality rate of the juveniles weighing 2 to 20 grams was zero in water salinities ranging 0 to 12.5 gr/lit. This supports the fact that the fish have a remarkable adaptability to changes in the environmental condition. Considering changes in the histology and mortality rate, it is concluded that the proper weight for release of juvenile Caspian Sea Brown Trout is 10 grams and the best water salinities is in the range 8-12.5 gr/lit, the same value found in the estuary.
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Format: | Journal Contribution biblioteca |
Language: | Persian |
Published: |
2006
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Subjects: | Histological, Environmental, Salmo trutta caspius, Weight, Salinity, Gill, Mortality, Brown Trout, Estuary, |
Online Access: | http://hdl.handle.net/1834/12874 |
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dig-aquadocs-1834-128742021-05-19T06:44:36Z Changes in gill histology and mortality rate of juvenile Caspian Sea Brown Trout (Salmo trutta caspius Kessler, 1877) in different weights and water salinities Ataimehr, B. Mojazi Amiri, B. Abdolhay, H. Mirvaghefi, A.R. Histological Environmental Salmo trutta caspius Weight Salinity Gill Mortality Brown Trout Estuary Changes in gill histology and mortality rate of juvenile Caspian Sea Brown Trout Salmo trutta caspius Kessler-1877 in different weights and water salinities were studied. The indicators used in this study were the change in number and size of gill chloride cells as well as mortality rate of the juvenile trout. Juveniles weighing 2, 5, 10, 15 and 20 grams were directly transferred into water with salinities of 0, 4, 8 and 12.5 gr/lit and kept for 120 hours. Histological assessment showed that the number of gill chloride cells increases with the increase in weight and their size increases invisibly. Also, we found that the number of gill chloride cells is increased when salinity increases while the size of the cells undergoes an invisible downward trend. During the 120 hour test, mortality rate of the juveniles weighing 2 to 20 grams was zero in water salinities ranging 0 to 12.5 gr/lit. This supports the fact that the fish have a remarkable adaptability to changes in the environmental condition. Considering changes in the histology and mortality rate, it is concluded that the proper weight for release of juvenile Caspian Sea Brown Trout is 10 grams and the best water salinities is in the range 8-12.5 gr/lit, the same value found in the estuary. Published 2018-05-16T12:18:18Z 2018-05-16T12:18:18Z 2006 Journal Contribution Refereed 1026-1354 http://hdl.handle.net/1834/12874 fa http://isfj.areo.ir/ pp.119-128 Iran Caspian Sea |
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Histological Environmental Salmo trutta caspius Weight Salinity Gill Mortality Brown Trout Estuary Histological Environmental Salmo trutta caspius Weight Salinity Gill Mortality Brown Trout Estuary |
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Histological Environmental Salmo trutta caspius Weight Salinity Gill Mortality Brown Trout Estuary Histological Environmental Salmo trutta caspius Weight Salinity Gill Mortality Brown Trout Estuary Ataimehr, B. Mojazi Amiri, B. Abdolhay, H. Mirvaghefi, A.R. Changes in gill histology and mortality rate of juvenile Caspian Sea Brown Trout (Salmo trutta caspius Kessler, 1877) in different weights and water salinities |
description |
Changes in gill histology and mortality rate of juvenile Caspian Sea Brown Trout Salmo trutta caspius Kessler-1877 in different weights and water salinities were studied. The indicators used in this study were the change in number and size of gill chloride cells as well as mortality rate of the juvenile trout. Juveniles weighing 2, 5, 10, 15 and 20 grams were directly transferred into water with salinities of 0, 4, 8 and 12.5 gr/lit and kept for 120 hours.
Histological assessment showed that the number of gill chloride cells increases with the increase in weight and their size increases invisibly. Also, we found that the number of gill chloride cells is increased when salinity increases while the size of the cells undergoes an invisible downward trend. During the 120 hour test, mortality rate of the juveniles weighing 2 to 20 grams was zero in water salinities ranging 0 to 12.5 gr/lit. This supports the fact that the fish have a remarkable adaptability to changes in the environmental condition. Considering changes in the histology and mortality rate, it is concluded that the proper weight for release of juvenile Caspian Sea Brown Trout is 10 grams and the best water salinities is in the range 8-12.5 gr/lit, the same value found in the estuary. |
format |
Journal Contribution |
topic_facet |
Histological Environmental Salmo trutta caspius Weight Salinity Gill Mortality Brown Trout Estuary |
author |
Ataimehr, B. Mojazi Amiri, B. Abdolhay, H. Mirvaghefi, A.R. |
author_facet |
Ataimehr, B. Mojazi Amiri, B. Abdolhay, H. Mirvaghefi, A.R. |
author_sort |
Ataimehr, B. |
title |
Changes in gill histology and mortality rate of juvenile Caspian Sea Brown Trout (Salmo trutta caspius Kessler, 1877) in different weights and water salinities |
title_short |
Changes in gill histology and mortality rate of juvenile Caspian Sea Brown Trout (Salmo trutta caspius Kessler, 1877) in different weights and water salinities |
title_full |
Changes in gill histology and mortality rate of juvenile Caspian Sea Brown Trout (Salmo trutta caspius Kessler, 1877) in different weights and water salinities |
title_fullStr |
Changes in gill histology and mortality rate of juvenile Caspian Sea Brown Trout (Salmo trutta caspius Kessler, 1877) in different weights and water salinities |
title_full_unstemmed |
Changes in gill histology and mortality rate of juvenile Caspian Sea Brown Trout (Salmo trutta caspius Kessler, 1877) in different weights and water salinities |
title_sort |
changes in gill histology and mortality rate of juvenile caspian sea brown trout (salmo trutta caspius kessler, 1877) in different weights and water salinities |
publishDate |
2006 |
url |
http://hdl.handle.net/1834/12874 |
work_keys_str_mv |
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