Temporal variations of length, weight, and condition of Hilsa shad, Tenualosa ilisha (Hamilton, 1822) in the Meghna River, Southeastern Bangladesh | ||||
Egyptian Journal of Aquatic Biology and Fisheries | ||||
Article 33, Volume 24, Issue 2, March 2020, Page 481-494 PDF (633.92 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/ejabf.2020.88776 | ||||
View on SCiNiTO | ||||
Authors | ||||
Akhery Nima ; Md. Yeamin Hossain; Md. Ashekur Rahman ; Zannatul Mawa ; Md. Rabiul Hasan ; Md. Akhtarul Islam ; Md. Ataur Rahman; Sumaya Tanjin ; Wasim Sabbir; Md. Abul Bashar ; Yahia Mahmud | ||||
Abstract | ||||
The current study was on temporal variations of length, weight, and condition of Tenualosa ilisha (Hamilton, 1822) from the Meghna River, Southeastern Bangladesh for the period of July 2018 to June 2019. A total of 1433 individuals were collected from the Meghna River (Chandpur and Laxmipur region, SE Bangladesh). Bodyweight (BW) and total length (TL) were measured with 0.01 g and 0.01 cm accuracy for each specimen. The relative condition factor (KR) was calculated by the equation of Le Cren (1951): KR = W/(a×Lb) where W is the body weight (g) and L is the total length (cm) and a & b is the length-weight relationship parameters estimated with linear regression analyses. The value of KR ~ 1 indicates good health, >1 indicates over bodyweight with compare to length, whereas <1 indicates a relatively poor condition of fish. The TL ranged from 15.3-57.8 cm while the BW was 37.17–2250 g. The overall KR for T. ilisha was 0.65-1.66 in the Meghna River. The maximum KR was found in July while the minimum was in January. The KRwas strongly correlated with BW in the Meghna River. These findings will help to improve the sustainable management policy of hilsa fishery in the Meghna river ecosystem and other adjacent water bodies. | ||||
Keywords | ||||
Temporal variation; Relative condition; Tenualosa ilisha; Meghna River; Bangladesh | ||||
Statistics Article View: 574 PDF Download: 777 |
||||