International Journal of Fisheries and Aquatic Studies
2017, Vol. 5, Issue 4, Part E
Sex ratio, length-weight and length-length relationships of Amblypharyngodon mola (Cyprinidae) in the Payra River, southern Bangladesh
Author(s): Ferdous Ahamed, Newton Saha, Md. Rasel, Zoarder Faruque Ahmed and Md. Yeamin Hossain
Abstract: Sex ratio, length-weight and length-length relationships of Amblypharyngodon mola were studied in the Payra River during February 2016-January 2017. Monthly samples were collected from the small-scale fishers of set bagnet fishery in the Payra River. All specimens were sexed out and standard length (SL), total length (TL), fork length (FL) and body weight (BW) were measured. The overall sex ratio showed no significant difference between sexes. However, the monthly sex ratio was 1:1 for almost all the year, except in June when females were significantly more abundant than males. With regard to the size class, the sex ratio was found to be non-significant up to 4.0 cm TL, however; at 5.0 cm TL the number of male was significantly higher than female and after that the number of female increased significantly than male till the maximum size class. The allometric coefficient ‘b’ of the LWRs between SL vs. BW and FL vs. BW indicated negative allometric growth and isometric growth respectively for both sexes. While TL vs. BW indicated positive allometric growth in males and isometric growth in females. On the other hand, the LWRs for pooled data indicated negative allometric growth, positive allometric growth and isometric growth for SL vs. BW, TL vs. BW and FL vs. BW respectively. The allometric coefficient ‘b’ of the LLRs between SL vs. TL, SL vs. FL and TL vs. FL indicated positive allometric growth, isometric growth and negative allometric growth respectively for both sexes. However, the pooled data shows positive allometric growth between SL vs. TL, negative allometric growth between SL vs. FL and between TL vs. FL. It was concluded that the data generated from the study will form a baseline tool for effective fisheries management and sustainable exploitation of A. mola in the Payra River as well as surrounding waters of Bangladesh.
Pages: 359-362 | 1111 Views 95 DownloadsDownload Full Article: Click Here
How to cite this article:
Ferdous Ahamed, Newton Saha, Md. Rasel, Zoarder Faruque Ahmed, Md. Yeamin Hossain. Sex ratio, length-weight and length-length relationships of Amblypharyngodon mola (Cyprinidae) in the Payra River, southern Bangladesh. Int J Fish Aquat Stud 2017;5(4):359-362.
