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...

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Main Authors:	Ferdous Ahamed, Zoarder Faruque Ahmed, Md. Yeamin Hossain, Jun Ohtomi
Format:	Article
Language:	English
Published:	Universiti Kebangsaan Malaysia 2014
Online Access:	http://journalarticle.ukm.my/8034/ http://journalarticle.ukm.my/8034/ http://journalarticle.ukm.my/8034/1/02_Ferdous_Ahmad.pdf

id	ukm-8034
recordtype	eprints
spelling	ukm-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/
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
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.
format	Article
author	Ferdous Ahamed, Zoarder Faruque Ahmed, Md. Yeamin Hossain, Jun Ohtomi,
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
author_facet	Ferdous Ahamed, Zoarder Faruque Ahmed, Md. Yeamin Hossain, Jun Ohtomi,
author_sort	Ferdous Ahamed,
title	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_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_sort	population biology of the indian river shad, gudusia chapra (clupeidae) in the old brahmaputra river, north-eastern bangladesh
publisher	Universiti Kebangsaan Malaysia
publishDate	2014
url	http://journalarticle.ukm.my/8034/ http://journalarticle.ukm.my/8034/ http://journalarticle.ukm.my/8034/1/02_Ferdous_Ahmad.pdf
first_indexed	2023-09-18T19:51:19Z
last_indexed	2023-09-18T19:51:19Z
_version_	1777406238513954816

Population Biology of the Indian River Shad, Gudusia chapra (Clupeidae) in the Old Brahmaputra River, North-Eastern Bangladesh

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