LENGTH-WEIGHT RELATIONSHIP AND CONDITIONAL FACTOR OF 16 IMPORTANT FISH SPECIES IN THE MEKONG DELTA, VIETNAM
Southern Branch of the Joint Vietnam-Russia Tropical Science and Technology Research Center
No.3, 3/2 street, ward 11, district 10, Ho Chi Minh City, Vietnam
Phone: +84 974444119; Email: tvtien.itb@gmail.com
Main Article Content
Abstract
The length-weight relationship (LWR) constitutes a fundamental analytical tool in ichthyological research, facilitating the assessment of growth dynamics, health status, and morphometric variations within fish communities. The present investigation was conducted to analyze the LWRs of economically and ecologically important fish species, which are predominantly exploited by small-scale fisheries within the Mekong Delta, Vietnam. Between January 2019 and March 2020, a total of 1,546 specimens, encompassing 16 species across 11 taxonomic families, were systematically collected. Morphometric data, specifically total length (TL) and body weight (W), were meticulously recorded for each individual, and sex was identified wherever feasible to enhance biological interpretation. The length-weight relationship was estimated using the equation W=a*TLb, where a and b represent species-specific constants. To enable statistical inference, a logarithmic transformation was applied, yielding a linear form: log(W) = log(a) + b*log(TL), which was subsequently analyzed using least-squares linear regression. All length-weight relationships deviations fell within the range of 2.72 to 3.28, of which eight species exhibited positive allometry (b > 3), seven species demonstrated negative allometry (b < 3), and one species showed isometric growth (b = 3). In addition, Fulton’s condition factor (K) was utilized as an indicator of fish health status. With the exception of two species from the genus Coilia, all estimated fish species showed comparatively high K-values, suggesting a generally favorable physiological condition among the studied fish populations. Collectively, these results highlight the overall health resilience and adaptive potential of fish communities inhabiting the dynamic aquatic habitats of the Mekong Delta.
http://doi.org/10.58334/vrtc.jtst.n38.09
Keywords
fisheries biology, condition factor analysis, allometric growth, isometric growth
Article Details
References
2. D. D. Tran et al., Fishes of the Mekong Delta, Vietnam, Can Tho: Can Tho University Publishing House, 2013, 147 p.
3. R. Froese, Cube law, condition factor and weight-length relationships: History, meta-analysis and recommendations, Journal of Applied Ichthyology, Vol. 22, No. 4, pp. 241-253, 2006. DOI: 10.1111/j.1439-0426.2006.00805.x
4. A. S. Halls, I. et al., Atlas of deep pools in the Lower Mekong River and some of its tributaries, MRC Technical Paper, No. 31, Phnom Penh, Cambodia, Mekong River Commission, 2013, 69 p.
5. V. N. Ut, A. V. Hoa and H. P. Vinh, Status of fish biodiversity and fishing on Hau River, Mekong Delta, Vietnam, Annales de Limnologie - International Journal of Limnology, Vol. 56, No. 14, 11 p. 2020. DOI: 10.1051/limn/2020012
6. E. P. Karpova, et al., Spatial Variations in Fish Abundance in the Mekong Delta, Russian Journal of Ecology, Vol. 52, pp. 146–154, 2021. DOI: 10.1134/S1067413620050082
7. E. P. Karpova, E. R. Ablyazov, S. V. Kurshakov, I. I. Chesnokova, C. N. Dinh and T. B. Hai, Distribution, population structure, and selected biological characteristics of fish in the genus Coilia (Engraulidae) in the Mekong Delta, Journal of Ichthyology, Vol. 61, pp. 554–563, 2021. DOI: 10.1134/S003294522104007X.
8. E. P. Karpova et al., Distribution of fish and decapodes in the Mekong delta (Vietnam), Kỷ yếu Hội nghị khoa học Kỷ niệm 30 năm ngày truyền thống Chi nhánh Phía Nam (20/02/1992-20/02/2022). Hà Nội – Nha Trang - TP. Hồ Chí Minh, Tháng 12 năm 2021 [Hồ Chí Minh]: Trung tâm Nhiệt đới Việt – Nga, Chi nhánh Phía Nam, 2021, tr. 375–382.
9. W. J. Rainboth, Fishes of the Cambodian Mekong. FAO species identification field guide for fishery purposes, Rome: FAO, 1996, 265 p.
10. W. J. Rainboth, C. Vidthayanon and Đ. Y. Mai, Fishes of the Greater Mekong ecosystem with species list and photographic atlas. Museum of Zoology, University of Michigan, USA 2012, 173 p.
11. M. Kottelat, The Fishes of the inland waters of Southeast Asia: A Catalogue and core bibliography of the fishes known to occur in freshwaters, mangroves and estuaries, The Raffles Bulletin of Zoology, Vol. 27, pp. 1–663, 2013.
12. Y. Taki et al., Fishes of the Indochinese Mekong, Tokyo: Nagao Natural Environment Foundation, 2021, 562 p.
13. R. Froese, D. Pauly Eds., FishBase. World Wide Web electronic publication, 2021. [Online]. Available: http://www.fishbase.org. [Accessed Dec. 10, 2024].
14. E. D. Le Cren, The length-weight relationship and seasonal cycle in gonad weight and condition in the perch (Perca flavescens), Journal of Animal Ecology, Vol. 20, pp. 201–219, 1951. DOI: 10.2307/1540
15. Q. M. Dinh, The length-weight relationship of the duckbill sleeper Butis butis (Hamilton, 1822), The University of Danang - Journal of Science and Technology, Vol. 3(112), pp. 47–49, 2017b.
16. Q. M. Dinh, Y. N. Phan and D. D. Tran, Population biology of the goby glossogobius giuris (Hamilton, 1822) caught in the Mekong Delta, Vietnam, Asian Fisheries Science, Vol. 30, Iss. 1, pp. 26–37, 2017.
17. Q. M. Dinh, T. V. Nguyen and D. D. Tran, Population biological parameters of Ambassis vachellii (Perciformes: Ambassidae) caught from Bay Hap and Cua Lon estuaries, Ca Mau province, Vietnam, Egyptian Journal of Aquatic Biology and Fisheries, Vol. 24, Iss. 7, pp. 779–801, 2020a. DOI: 10.21608/ejabf.2020.132409.
18. Q. M. Dinh, L. T. Tran, N. C. Ngo, T. B. Pham and T. T. K. Nguyen, Reproductive biology of the unique mudskipper periophthalmodon septemradiatus living from estuary to upstream of the Hau River, Acta Zoologica, Vol. 101. Iss. 2, pp. 206–217, 2020b. DOI: 10.1111/azo.12286.
19. D. D. Tran, V. T. Nguyen and Q. M. Dinh, Population dynamics of Stolephorus dubiosus in Bay Hap and Cua Lon estuaries, Mekong Delta, Vietnam, AACL Bioflux, Vol. 13, Iss. 4, pp. 2250–2264, 2020.
20. M. Q. Dinh, Aspects of th reproductive biology of the red goby Trypauchen vagina (Gobiidae) from the Mekong Delta, Journal of Applied Ichthyology, Vol. 34, No. 1, pp.103-110, 2017. DOI: 10.1111/jai.13521
21. Q. M. Dinh, T. T. N. Tran, Reproductive biological traits of the goby Stigmatogobius pleurostigma (Bleeker, 1849) from the Mekong Delta, Vietnam, Indian Journal of Fisheries, Vol. 65, No. 1, pp. 20–25, 2018. DOI: 10.21077/ijf.2018.65.1.68188-04
22. Q. M. Dinh, T. T. G. Nguyen and T.K.T. Nguyen, Reproductive biology of the mudskipper Boleophthalmus boddarti in Soc Trang, Academia Journal of Biology, Vol. 37, No. 3, pp. 362–369, 2015. DOI: 10.15625/0866-7160/v37n3.6720.
23. Q. M. Dinh, T. T. H. Lam, T. H. D. Nguyen, T. M. Nguyen, T. T. K. Nguyen and N. T. Nguyen, First reference on reproductive biology of Butis koilomatodon in Mekong Delta, Vietnam, BMC Zoology, Vol. 6, No. 7, 2021. DOI: 10.1186/s40850-021-00072-y
24. Q. M. Dinh, Morphometrics and condition factor dynamics of the Goby stigmatogobius pleurostigma (Bleeker 1849) during dry and wet seasons in the Mekong Delta, Vietnam, Asian Fisheries Science, Vol. 30, pp. 17–25, 2017a. DOI: 10.33997/j.afs.2017.30.1.002.
25. C. L. Solania, R. A. Seronay, Reproductive aspect of the native Sharpnose hammer croaker, Johnius borneensis (Bleeker, 1850) from Agusan River Estuary, Caraga region, Philippines, Journal of Entomology and Zoology Studies, Vol. 5, No. 5, pp. 220–228, 2017. DOI: 10.21077/ijf.2018.65.1.68188-04
26. C. Hanjavanit, S. Buromra and N. Sangpradub, The length-weight relationships, condition factors and gut contents of Syncrossus helodes (Sauvage, 1876) and Yasuhikotakia modesta (Bleeker, 1864) from the Mekong River, Muang District, Nong Khai Province, Northeastern Thailand, African Journal of Agricultural Research, Vol. 8, pp. 5508–5517, 2013. DOI: 10.5897/AJAR12.2120.
27. Q. M. Dinh, A preliminary study on length-weight relationship of the mudskipper Boleophthalmus boddarti in Soc Trang, Academia Journal of Biology, Vol. 36, No. 1, pp. 88–92, 2014. DOI: 10.15625/0866-7160/v36n1.4524.
28. A. S. Halls, M. Kshatriya, Modelling the cumulative effects of mainstream hydropower dams on migratory fish populations in the lower Mekong Basin, MRC Technical Paper, No. 25, Mekong River Commission, Vientiane, 2009, 104 p. DOI:
10.52107/mrc.ajhz5g
29. K. Pin et al., Cambodian freshwater fish assemblage structure and distribution patterns: Using a large-Scale monitoring network to understand the dynamics and management implications of species clusters in a global biodiversity hotspot, Water, Vol. 12, Iss. 9, 2506, 2020. DOI: 10.3390/w12092506.
30. S. M. Tagarao, C. L. Solania, J. C. Jumawan, S. G. Masangcay and L. B. Calagui, Length-Weight Relationship (LWR), Gonadosomatic Index (GSI) and Fecundity of Johnius borneensis (Bleeker, 1850) from Lower Agusan River basin, Butuan City, Philippines, Journal of Aquaculture Research and Development, Vol. 11, 598, 2020. DOI: 10.35248/2155-9546.20.11.598.
31. K. M. Konan, L. Doumbia, A. B. Adépo-Gourène, A. Ouattara and G. Gourène, Relationships between morphometric characteristics of brackishwater prawn, Macrobrachium macrobrachion (Herklots, 1851), of Côte d’Ivoire (West Africa), Iranian Journal of Fisheries Sciences, Vol. 16, Iss. 1, pp. 275–295, 2017.