Some biological characteristics of roach, Rutilus rutilus caspicus, in Gomishan wetland
This study was conducted to determine some biological characteristics of migration population of roach, rutilus caspius including age, growth and reproduction in Gomishan wetland from early November 1999 to early December 2000. The sampling were carried out monthly but in the peak of spawning period (late February to mid April) it was done weekly. The sex ratio was found M:F=1.17:1.00 without any significant difference (even at 10% level); but the results of the sex ratio for each separate age group showed significant difference (p< 0.05). A significant correlation was determined between total lengths, body weight, scale radius and age Based on back calculation, the maximum growth rate were found in ages 1+ and 2+ Gonadosmatic index (GSl) was age-dependent; with two peaks or late February and early March for males und late March and early April for females. The eggs diameter was measured with a range from 0.9 mm to 1.45 mm and the absolute fecundity was related to age.
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Format: | article biblioteca |
Language: | Persian |
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2002
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Subjects: | Biology, Roach, Rutilus rutilus caspicus, biology, Gomishan wetland, Iran, |
Online Access: | http://hdl.handle.net/1834/38809 |
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dig-aquadocs-1834-388092021-07-15T02:45:38Z Some biological characteristics of roach, Rutilus rutilus caspicus, in Gomishan wetland Naddafi, R. Mojazi Amiri, B. Karami, M. Kiabi, B. Abdoli, A. Biology Roach Rutilus rutilus caspicus biology Gomishan wetland Iran This study was conducted to determine some biological characteristics of migration population of roach, rutilus caspius including age, growth and reproduction in Gomishan wetland from early November 1999 to early December 2000. The sampling were carried out monthly but in the peak of spawning period (late February to mid April) it was done weekly. The sex ratio was found M:F=1.17:1.00 without any significant difference (even at 10% level); but the results of the sex ratio for each separate age group showed significant difference (p< 0.05). A significant correlation was determined between total lengths, body weight, scale radius and age Based on back calculation, the maximum growth rate were found in ages 1+ and 2+ Gonadosmatic index (GSl) was age-dependent; with two peaks or late February and early March for males und late March and early April for females. The eggs diameter was measured with a range from 0.9 mm to 1.45 mm and the absolute fecundity was related to age. 2021-06-24T18:14:29Z 2021-06-24T18:14:29Z 2002 article TRUE 1026-1354 http://hdl.handle.net/1834/38809 fa http://www.ifro.ir application/pdf application/pdf 103-126 http://aquaticcommons.org/id/eprint/24117 18721 2018-08-03 07:26:57 24117 Iranian Fisheries Science Research Institute |
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Biology Roach Rutilus rutilus caspicus biology Gomishan wetland Iran Biology Roach Rutilus rutilus caspicus biology Gomishan wetland Iran Naddafi, R. Mojazi Amiri, B. Karami, M. Kiabi, B. Abdoli, A. Some biological characteristics of roach, Rutilus rutilus caspicus, in Gomishan wetland |
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This study was conducted to determine some biological characteristics of migration population of roach, rutilus caspius including age, growth and reproduction in Gomishan wetland from early November 1999 to early December 2000. The sampling were carried out monthly but in the peak of spawning period (late February to mid April) it was done weekly. The sex ratio was found M:F=1.17:1.00 without any significant difference (even at 10% level); but the results of the sex ratio for each separate age group showed significant difference (p< 0.05). A significant correlation was determined between total lengths, body weight, scale radius and age Based on back calculation, the maximum growth rate were found in ages 1+ and 2+ Gonadosmatic index (GSl) was age-dependent; with two peaks or late February and early March for males und late March and early April for females. The eggs diameter was measured with a range from 0.9 mm to 1.45 mm and the absolute fecundity was related to age. |
format |
article |
topic_facet |
Biology Roach Rutilus rutilus caspicus biology Gomishan wetland Iran |
author |
Naddafi, R. Mojazi Amiri, B. Karami, M. Kiabi, B. Abdoli, A. |
author_facet |
Naddafi, R. Mojazi Amiri, B. Karami, M. Kiabi, B. Abdoli, A. |
author_sort |
Naddafi, R. |
title |
Some biological characteristics of roach, Rutilus rutilus caspicus, in Gomishan wetland |
title_short |
Some biological characteristics of roach, Rutilus rutilus caspicus, in Gomishan wetland |
title_full |
Some biological characteristics of roach, Rutilus rutilus caspicus, in Gomishan wetland |
title_fullStr |
Some biological characteristics of roach, Rutilus rutilus caspicus, in Gomishan wetland |
title_full_unstemmed |
Some biological characteristics of roach, Rutilus rutilus caspicus, in Gomishan wetland |
title_sort |
some biological characteristics of roach, rutilus rutilus caspicus, in gomishan wetland |
publishDate |
2002 |
url |
http://hdl.handle.net/1834/38809 |
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