Population dynamics of Bombay duck Harpodon nehereus (Hamilton, 1822) of the Bay of Bengal along Bangladesh coast

Abstract

Population parameters of Harpadon nehereus were estimated using FiSAT-II. length-frequency data collected from different landing centers along the coast of Bangladesh. The Von Bertalanffy growth parameters L and K for the species were 45.05 cm and 1.30/year, respectively. The annual rate of natural mortality (M) and fishing mortality (F) were found to be 1.86 and 2.58, respectively. The estimated value of the exploitation rate (E) using the lengthconverted catch curve was 0.58 and E max was found to be 0.582. The recruitment pattern of this species was continuous and two peaks per year. The present investigation clearly showed the over fishing (E > 0.50) condition for H. nehereus in Bangladesh. The estimated length-weight relationship for the combined sex was found to be W = 0.003199 L 3 .

ELEFAN Based Population Dynamics of Bombay Duck, Harpadon nehereus Inhabiting the Marine Waters of the West Coast of India

“…al. (2009), 1.12 by Liang and Pauly (2017), 1.86 by Sarker et al (2018) and 1.58 by He et al (2018) but lower than that estimated (2.46) by Mustafa et al (1998).…”

“…45 (1985) 0.77 (1985) (Fernandez and Devaraj, 1996) 60. 97 (1958) 0.29 (1958) Bangladesh waters 24.48 1.50 (Mustafa et al, 1998) Hong Kong inshore waters 35.1 0.67 (Pitcher et al, 1998) Neritic waters of Bangladesh waters 24.48 1.50 (Nurul, 2001) Off Saurashtra coast 35.39 0.86 (Ghosh et al, 2009) Mumbai waters 43.4 0.81 (Balli et al, 2011) Bay of Bengal 45.05 1.30 (Sarker et al, 2018) ELEFAN Based Population Dynamics of Bombay Duck, Harpadon nehereus Inhabiting the Marine Waters of the West Coast of India…”

“…Balli et al (2011) estimated M, F and Z as 1.30, 3.03 and 4.33 respectively for Bombay duck caught from Mumbai waters of the Indian coastline. Sarker et al (2018) reported that the annual rate of fishing mortality (F) for Bombay duck was 2.58 from the Bay of Bengal along Bangladesh coastline. Various other authors have reported natural mortality for the species as 1.462 (Khan, 1986;Biradar, 1987), 1.572 (Khan, 1989), 0.8 (Kurian, 1989;Kurian and Kurup, 1992;Mustafa et al, 1994;Fernandez and Devaraj, 1996).…”

“…The fishes are typically sunidried on constructed raising bamboo stages and the dried fish are traded to nations like the Middle-East, U. K, Srilanka and Singapore (Nurul, 2001). Various authors have studied the age and growth of this species from different location of the Indian and International waters (Biradar, 1989;Khan, 1989;Kurian and Kurup, 1992;Mustafa et al, 1994Mustafa et al, , 1998Fernandez and Devaraj, 1996;Pitcher et al, 1998;Nurul, 2001;Lin et al, 2006;Ghosh et al, 2009;Li and Huang, 2009;Balli et al, 2011;Pan and Cheng, 2013;Laga et al, 2015;Liang and Pauly, 2017;Sarker et al, 2018;He et al, 2018).…”

Polymorphic loci analysis of 16s ribosomal RNA gene of economically important marine lizardfish Bombay duck (Harpadon nehereus)

“…The elevated market demand and over exploitation of Bombay duck fish may deplete the wild stocks to an unsustainable level (Sarker et al 2017). Nowadays, the best way to protect a species is not only to preserve its ecosystem but also preserve its genetic resources and diversity (Hedrick 2001).…”