Variations in length-weight relationship, growth and body condition of the commercial mullet Ellochelon vaigiensis in the Vietnamese Mekong Delta.

Autor:	Dinh QM; Department of Biology, School of Education, Can Tho University, Xuan Khanh Ward, Ninh Kieu District, Can Tho 900000, Vietnam., Truong NT; Biotechnology Research and Development Institute, Can Tho University, Xuan Khanh Ward, Ninh Kieu District, Can Tho 900000, Vietnam., Duc Nguyen TH; Department of Biology, School of Education, Can Tho University, Xuan Khanh Ward, Ninh Kieu District, Can Tho 900000, Vietnam., Huyen Tran LT; Biotechnology Research and Development Institute, Can Tho University, Xuan Khanh Ward, Ninh Kieu District, Can Tho 900000, Vietnam.; Institute of High Quality Biotechnology Food Technology, Cuu Long University, Vinh Long 850000, Vietnam., Kieu Nguyen TT; Department of Biology, An Khanh High School, An Khanh Ward, Ninh Kieu District, Can Tho 900000, Vietnam., Phan LH; Department of Geography, School of Education, Can Tho University, Xuan Khanh Ward, Ninh Kieu District, Can Tho 900000, Vietnam.
Jazyk:	angličtina
Zdroj:	Heliyon [Heliyon] 2022 Nov 23; Vol. 8 (11), pp. e11789. Date of Electronic Publication: 2022 Nov 23 (Print Publication: 2022).
DOI:	10.1016/j.heliyon.2022.e11789
Abstrakt:	The Squaretail mullet Ellochelon vaigiensis is widely found from marine to brackish and freshwater, including the Vietnamese Mekong Delta (VMD). Data on the length-weight relationships (LWRs), growth pattern, and condition factor (CF) play an essential role in fisheries assessment but are limited to E. vaigiensis - a commercial fish in VMD. To better understand the growth pattern of this fish, the study collected samples at four sites, including Thanh Phu, Ben Tre (BT); Duyen Hai, Tra Vinh (TV); Tran De, Soc Trang (ST); and Dong Hai, Bac Lieu (BL). Each month, fish samples were collected using bottom nets at each sampling site during high tide in both the dry season (January to May 2021) and the wet season (November to December 2020 and June to October 2021). This study qualified whether LWRs, growth pattern, and CF of E. vaigiensis vary with sexual, intraspecific, and spatiotemporal variables. The analysis results of 942 specimens showed that fish total length (TL = 17.86 ± 0.13 cm) and weight (W = 54.29 ± 1.05 g) changed with sex, season, month and site. The W could be appraised from a given TL due to high coefficients ( r 2 ) of LWRs that were regulated by fish size and season but not sex. The species showed negative allometry as its slope value of LWRs (b = 2.34 ± 0.30) was <3. The growth pattern did not change with sex and site but varied fish size, season, and months ranging from negative allometry to isometry. The CF of females (1.08 ± 0.01) was higher than males (0.99 ± 0.01). Albeit this fish showed spatiotemporal variation in CF, ranging from 0.81 ± 0.01 to 1.25 ± 0.02, the CF (1.02 ± 0.01) was significantly higher than the one threshold, indicating that E. vaigiensis lived a favorable condition. Research results show that this fish species has a dominant growth pattern in terms of length ( b < 3) and is well adapted to the environment ( CF ≈ 1). These data have an important role in suggesting the future aquaculture of this fish. Competing Interests: The authors declare no conflict of interest. (© 2022 The Author(s).)
Databáze:	MEDLINE
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