Glyptothorax silviae
Posted: 26 Mar 2014, 19:50
Growth, reproduction and feeding biology of an endemic Sucker Catfish, Glyptothorax silviae (Coad, 1981) (Actinopterygii: Sisoridae), in the Maroon River, Iran.
Mohammad Amini Chermahini, Samad Bahrami, Farideh Bakhshi, Amir Hossein Tahmasebi, Fatemeh Shahrani.
International Journal of Aquatic Biology (2014) 2(1): 1-8.
Abstract: This study was carried out to provide some information on the biological features of the endemic Sucker Catfish, Glyptothorax silviae, from the Maroon River in the Tigris basin, Iran. Samples were collected at monthly intervals throughout the year and 277 individuals of G. silviae were caught. The mean total length and weight were 8.1 ± 1.7 (±SD) cm and 5.8 ± 3.5 (±SD) g and maximum length and weight were 11.9 cm and 17.4 g, respectively. Length-Weight relationship of the total specimens was calculated as W = 0.006 TL3.205, (r2= 0.956) indicating allometric growth pattern and was not significantly different between males and females. The overall condition factor was 0.62. The sex-ratio (1.23M:1F) was not significantly different from the expected 1:1 ratio. Glyptothorax silviae reproduces during June-September. Absolute and relative fecundity was 1129 eggs/fish and 105 eggs/g body weight, respectively. The egg size ranged from 0.994 to 1.76 mm with a mean value of 1.29 ± 0.171 (±SD) mm. The highest values of gonadosomatic index were observed in June-July. The gut content analysis revealed that G. silviae feeds only on aquatic insects.
Open access paper.
http://www.npajournals.com/ijab/index.p ... iew/113/99
Mohammad Amini Chermahini, Samad Bahrami, Farideh Bakhshi, Amir Hossein Tahmasebi, Fatemeh Shahrani.
International Journal of Aquatic Biology (2014) 2(1): 1-8.
Abstract: This study was carried out to provide some information on the biological features of the endemic Sucker Catfish, Glyptothorax silviae, from the Maroon River in the Tigris basin, Iran. Samples were collected at monthly intervals throughout the year and 277 individuals of G. silviae were caught. The mean total length and weight were 8.1 ± 1.7 (±SD) cm and 5.8 ± 3.5 (±SD) g and maximum length and weight were 11.9 cm and 17.4 g, respectively. Length-Weight relationship of the total specimens was calculated as W = 0.006 TL3.205, (r2= 0.956) indicating allometric growth pattern and was not significantly different between males and females. The overall condition factor was 0.62. The sex-ratio (1.23M:1F) was not significantly different from the expected 1:1 ratio. Glyptothorax silviae reproduces during June-September. Absolute and relative fecundity was 1129 eggs/fish and 105 eggs/g body weight, respectively. The egg size ranged from 0.994 to 1.76 mm with a mean value of 1.29 ± 0.171 (±SD) mm. The highest values of gonadosomatic index were observed in June-July. The gut content analysis revealed that G. silviae feeds only on aquatic insects.
Open access paper.
http://www.npajournals.com/ijab/index.p ... iew/113/99