Population Biology of the Indian River Shad, Gudusia chapra (Clupeidae) in the Old Brahmaputra River, North-Eastern Bangladesh
Population biology including population structure, reproduction, length-weight relationship and condition factor of a commercially important clupeid freshwater fish, Gudusia chapra was studied in the Old Brahmaputra River, Bangladesh during January-December 2009. In the present study, a total of 203...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Universiti Kebangsaan Malaysia
2014
|
| Online Access: | http://journalarticle.ukm.my/8034/ http://journalarticle.ukm.my/8034/1/02_Ferdous_Ahmad.pdf |
| _version_ | 1848811673445466112 |
|---|---|
| author | Ferdous Ahamed, Zoarder Faruque Ahmed, Md. Yeamin Hossain, Jun Ohtomi, |
| author_facet | Ferdous Ahamed, Zoarder Faruque Ahmed, Md. Yeamin Hossain, Jun Ohtomi, |
| author_sort | Ferdous Ahamed, |
| building | UKM Institutional Repository |
| collection | Online Access |
| description | Population biology including population structure, reproduction, length-weight relationship and condition factor of a commercially important clupeid freshwater fish, Gudusia chapra was studied in the Old Brahmaputra River, Bangladesh during January-December 2009. In the present study, a total of 2032 specimens (1091 male; 941 female) were collected. The overall sex ratio showed significant difference from the expected value 1:1 (male: female = 1:0.86, χ2 = 11.07, p<0.001). Length-frequency distribution showed a size predominance of females over males, where mean female size consistently exceeded that of males throughout the year. Female size at first sexual maturity was estimated as 8.3 cm in standard length (SL). Monthly gonadosomatic index (GSI) was higher during March-September with a peak in April, indicating this was the main spawning season. The allometric coefficient b of the length-weight relationship (LWR) indicated negative allometric growth in males and females, but the analysis of covariance (ANCOVA) showed significant differences in slope and intercept between the sexes (p<0.001). Fulton’s condition factor by months and SLs varied in both sexes and was attributed to variations in GSI with maturity. |
| first_indexed | 2025-11-14T23:50:08Z |
| format | Article |
| id | oai:generic.eprints.org:8034 |
| institution | Universiti Kebangasaan Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T23:50:08Z |
| publishDate | 2014 |
| publisher | Universiti Kebangsaan Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:generic.eprints.org:80342016-12-14T06:46:00Z http://journalarticle.ukm.my/8034/ Population Biology of the Indian River Shad, Gudusia chapra (Clupeidae) in the Old Brahmaputra River, North-Eastern Bangladesh Ferdous Ahamed, Zoarder Faruque Ahmed, Md. Yeamin Hossain, Jun Ohtomi, Population biology including population structure, reproduction, length-weight relationship and condition factor of a commercially important clupeid freshwater fish, Gudusia chapra was studied in the Old Brahmaputra River, Bangladesh during January-December 2009. In the present study, a total of 2032 specimens (1091 male; 941 female) were collected. The overall sex ratio showed significant difference from the expected value 1:1 (male: female = 1:0.86, χ2 = 11.07, p<0.001). Length-frequency distribution showed a size predominance of females over males, where mean female size consistently exceeded that of males throughout the year. Female size at first sexual maturity was estimated as 8.3 cm in standard length (SL). Monthly gonadosomatic index (GSI) was higher during March-September with a peak in April, indicating this was the main spawning season. The allometric coefficient b of the length-weight relationship (LWR) indicated negative allometric growth in males and females, but the analysis of covariance (ANCOVA) showed significant differences in slope and intercept between the sexes (p<0.001). Fulton’s condition factor by months and SLs varied in both sexes and was attributed to variations in GSI with maturity. Universiti Kebangsaan Malaysia 2014-11 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/8034/1/02_Ferdous_Ahmad.pdf Ferdous Ahamed, and Zoarder Faruque Ahmed, and Md. Yeamin Hossain, and Jun Ohtomi, (2014) Population Biology of the Indian River Shad, Gudusia chapra (Clupeidae) in the Old Brahmaputra River, North-Eastern Bangladesh. Sains Malaysiana, 43 (11). pp. 1645-1655. ISSN 0126-6039 http://www.ukm.my/jsm/ |
| spellingShingle | Ferdous Ahamed, Zoarder Faruque Ahmed, Md. Yeamin Hossain, Jun Ohtomi, Population Biology of the Indian River Shad, Gudusia chapra (Clupeidae) in the Old Brahmaputra River, North-Eastern Bangladesh |
| title | Population Biology of the Indian River Shad, Gudusia chapra (Clupeidae)
in the Old Brahmaputra River, North-Eastern Bangladesh |
| title_full | Population Biology of the Indian River Shad, Gudusia chapra (Clupeidae)
in the Old Brahmaputra River, North-Eastern Bangladesh |
| title_fullStr | Population Biology of the Indian River Shad, Gudusia chapra (Clupeidae)
in the Old Brahmaputra River, North-Eastern Bangladesh |
| title_full_unstemmed | Population Biology of the Indian River Shad, Gudusia chapra (Clupeidae)
in the Old Brahmaputra River, North-Eastern Bangladesh |
| title_short | Population Biology of the Indian River Shad, Gudusia chapra (Clupeidae)
in the Old Brahmaputra River, North-Eastern Bangladesh |
| title_sort | population biology of the indian river shad, gudusia chapra (clupeidae)
in the old brahmaputra river, north-eastern bangladesh |
| url | http://journalarticle.ukm.my/8034/ http://journalarticle.ukm.my/8034/ http://journalarticle.ukm.my/8034/1/02_Ferdous_Ahmad.pdf |