Megalaspis cordyla is one of the Carangid fish species commonly found in marine areas of the Sundarbans and the Bay of Bengal in Bangladesh. This study described the morphometric relationships including length-weight and length-length relations (LWRs and LLRs) and meristic characteristics of M. cordyla. A total of 100 individuals were collected from commercial fishers’ catch in the Bay of Bengal, Bangladesh during January-December 2021. For each individual, a total of fourteen various lengths were measured by measuring board with 0.01 cm and body weight (BW) was taken by digital balance with 0.01 g accuracy. Fin-ray numbers from all fins as well as scutes were counted by a magnifying glass. Total length (TL) varied from 17.0-36.5 cm and the total body weight (BW) ranged from 75.0-416.6 g. All LWRs were significantly related (p < 0.001), with r2 values ≥ 0.910. Based on r2 value (0.979), LWR by BW vs. TL (W= a × Lb) was the best fitted model among 14 equations. Besides, the LLRs were also significant with r2 values ≥ 0.908. According to r2 value (0.995), LLR by TL vs. FL (TL = a + b× FL) was the best fitted model among 14 equations. The fin formula of M. cordyla is: first dorsal, D1 I+VII; second dorsal, D2 I/14-18+6-8 finlets; pectoral, P1 20-26; pelvic, P2 I/5; anal, A II+I/12-16 +5-7 finlets. This study provided knowledge on morphometric and meristic features that would be very useful for species identification and stock assessment of M. cordyla in the Bay of Bengal and other marine ecosystems.
Bagenal, J.B. and F.W. Tesch, 1978. Methods for assessment of fish production in freshwaters. Oxford: Blackwell Scientific publication. 361 pp.
Barlow, G.W., 1961. Causes and significance of morphological variation in fishes. Syst. Zool. 10(3): 105-117.
Das, S.K., M. De and M.A. Ghaffar, 2014. Length-weight relationship and trophic level of hard-tail scad Megalaspis cordyla. Sci. Asia. 40(5): 317-322. (doi: 10.2306/ scienceasia1513-1874.2014.40.317
FAO/SIDP, 2000. Species Identification Sheet: Megalaspis cordyla. Fisheries global information system (FIGIS), Food and Agriculture Organization of the United Nations, Rome.
Froese, R. and D. Pauly, 2021. Fishbase 2021, World Wide Web electronic publication. Available at: http://www.fishbase.org (accessed 27 September 2021).
Froese, R., 2006. Cube law, condition factor and weight-length relationships: History, meta-analysis and recommendations. J. Appl. Ichthyol. 22(4): 241-253. (https:// doi.org/10.1111/j.1439-0426.2006.00805.x)
Habib, K.A., C.G. Kim, J. Oh, A.K. Neogi and Y.H. Lee, 2017. Aquatic Biodiversity of Sundarbans, Bangladesh (2nd edn). Korea Institute of Ocean Science and Technology (KIOST). 394 pp.
Hossain, M.S., S.R. Chowdhury, SM. Sharifuzzaman, M.M. Islam, M.A. Haque, J. Hasan, M.Z. Ali, M.E. Hoq and Y. Mahmud, 2020. Marine Fishes of Bangladesh. Bangladesh Fisheries Research Institute (BFRI), Mymensingh-2201, Bangladesh. 512 pp.
Hossain, M.Y., 2010. Morphometric relationships of length-weight and length-length of four Cyprinid small indigenous fish species from the Padma River (NW Bangladesh). Turk. J. Fish. Aquat. Sci. 10(1): 131-134. (doi: 10.4194/trjfas.2010. 0118)
Hossain, M.Y., A.K. Paul, M.A. Hossen, M.A. Islam, M.N.U. Pramanik and M.M. Rahman, 2016. Length–weight relationships of three Gobiidae species from the Rupsha River in southwestern Bangladesh. J. Appl. Ichthyol. 32(6): 1305-1307. (https://doi.org/10.1111/jai.13183)
Hossain, M.Y., M.A. Hossen, Z. Mawa, M.A. Rahman, M.R. Hasan, M.A. Islam, D. Khatun, M.A. Rahman, S. Tanjin, M.S. Sarmin, M.A. Bashar and J. Ohtomi, 2021a. Life history traits of three Ambassid fishes (Chanda nama, Parambassis lala and Parambassis ranga) from the Mathabhanga River, southwestern Bangladesh. Lakes & Reservoirs, 26(1): 59-69.
Hossain, M.Y., M.A. Rahman, O. Rahman, M.A. Islam, M.A. Rahman, M.R. Hasan, Z. Mawa, S. Tanjin, M.S. Sarmin, A. Nima, A.A. Chowdhury, M.A. Bashar and Y. Mahmud, 2021b. Morphological Characteristics and Length-Weight Relationships of Hilsa shad, Tenualosa ilisha (Hamilton, 1822) in the Ganges River. Acta Zool. Bulg. 74(1): 75-83. (http://www.acta-zoologica-bulgarica.eu/2021/ 002534)
Hossain, M.Y., S.R.M. Sayed, M.M. Rahman, M.M. Ali, M.A. Hossen, A.M. Elgorban, Z.F. Ahmed and J. Ohtomi, 2015. Length-weight relationships of nine fish species from Tetulia River, southern Bangladesh. J. Appl. Ichthyol. 31(5): 967-969. (https:// doi.org/10.1111/jai.12823)
Jadhav, T.D. and S.A. Mohite, 2013. Reproductive biology of Horse mackerel Megalaspis cordyla (Linnaeus, 1758) along Ratnagiri coast of Maharashtra, India. J. Mar. Biol. Ass. India 55(2): 35-40. (doi: 10.6024/jmbai.2013.55.2.01759-06)
Jaiswar, A.K. and M. Devaraj, 1989. Morphometric study of Megalaspis cordyla (Linnaeus, 1758) along the northwest coast of India. J. Ind. Fish. Assoc., 19: 1-6.
Jaiswar, A.K. and P. Acharya, 1991. Length-weight relationship of Megalaspis cordyla (Linnaeus, 1758). Along northwest coast of India. J. Indian Fish. Assoc. 21: 45-46.
Kottelat, M. and J. Freyhof, 2007. Handbook of European freshwater fishes.
Le Cren, E.D., 1951. The length-weight relationships and seasonal cycle in gonad weight and condition in the perch (Perca fluviatilis). J. Anim. Ecol. 20(2): 201-219. (https:// doi.org/10.2307/1540)
Oktaviani, D., E.B. Prianto and D. Nugroho, 2020. Length-weight, maturity, and condition factor of torpedo scads (Megalaspis cordyla Linnaeus, 1758) in the Java Sea, Indonesia. Biodiversitas 21(4): 1527-1534. (https://doi.org/10.13057/biodiv/ d210433)
Qamar, N. and S.K. Panhwar, 2018. Assessment of maturity, reproduction and reproductive potentials of Torpedo scad, Megalaspis cordyla (Linnaeus, 1758) from Northern Arabian Sea coast of Pakistan. Russ. J. Mar. Biol. 44(1): 42-50.
Reuben, S., H.M. Kasim, S. Sivakami, R.P.N. Nair, K.N. Kurup, M. Sivadas, A. Noble, S.K.V. Nair and S.G. Raje, 1992. Fishery, biology, and stock assessment of carangid resources from the Indian seas. Indian J. Fish. 39(3&4): 195-234.
Sabbir, W., M.Y. Hossain, M.N. Khan, F.A. Rima, M.S. Sarmin and M.A. Rahman, 2022. Biometric Indices of Flathead Sillago, Sillaginopsis panijus (Hamilton, 1822) from the Bay of Bengal (Southern Bangladesh). Thalassas: An Int. J. Mar. Sci. 1-10. (https://doi.org/10.1007/ s41208-022-00421-9)
Saker, Y., A.K. Jaiswar, S.K. Chakraborty and R.P. Swamy, 2004. Morphometry and length-weight relationship of Megalaspis cordyla (Linnaeus, 1758) from Mumbai coast. Indian J. Fish. 51(4): 481-486.
Santic, M., A. Vrdoljak, I. Mikulandra and A. Pallaoro, 2018. Morphometric and meristic characteristics of poor cod, Trisopterus minutus (L. 1758), from the eastern central Adriatic Sea. Period. Biol. 120(1): 51-57.
Sarmin, M.S., S. Tanjin, M.A. Rahman, M.R. Hasan, W. Sabbir, M. Asadujjaman, M.R.K. Mondol, K.A. Habib and M.Y. Hossain, 2021. Estimation of growth pattern and form factor of Torpedo scad Megalaspis cordyla (Linnaeus, 1758) in the Bay of Bengal, Bangladesh. Pak. J. Mar. Sci. 30(2): 109-117. (https://www.pakjmsuok.com/ index.php/pjms/article/view/103)
Sivakami, S., 1995. Fishery and biology of the carangid fish Megalaspis cordyla (Linnaeus) off Cochin. J. Mar. Biol. Ass. India 37(1&2): 237-248. (http://eprints. cmfri.org.in/id/eprint/656)
Smith-Vaniz, W., 1999. "Carangidae" (PDF). In Carpenter, K.E.; Niem, V.H. (eds.). The living marine resources of the Western Central Pacific Vol 4. Bony fishes part 2 (Mugilidae to Carangidae). FAO species identification guide for fishery purposes. Rome: FAO. 2659-2757 pp.
Sokal, R.R. and F.J. Rohlf, 1987. Introduction to Biostatistics. 2nd edn. New York: Freeman Publication.
Tanjin, S., W. Sabbir, M.Y. Hossain, M.A. Rahman, Z. Mawa, M.R. Hasan, F.A. Rima, O. Rahman, M.S. Sarmin, B.K. Sarker and K.A. Habib, 2021. Morphometric and Meristic Features of Gangetic hairfin anchovy, Setipinna phasa (Hamilton, 1822) in the Bay of Bengal (Bangladesh). J. King Abdulaziz Univ. Mar. Sci., 30(2): 71-83.
Tesch, F.W., 1971. Age and growth. In Methods for Assessment of Fish Production in Fresh Waters, edited by Rcker, W.E. Oxford: Balckwell Scientific Publications. 99-130 pp.
Zafar, M., M.G. Mustafa and M.A. Haque, 2000. Population dynamics of Megalaspis Cordyla (Linnaeus 1758) from Northeastern part of the Bay of Bengal, Bangladesh. Indian J. Fish. 47(3): 163-168.
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Copyright (c) 2022 Most. Shakila Sarmin, Md. Ashekur Rahman, Mst. Shefaly Khatun, Biplob Kumer Sarker, Md. Ataur Rahman, Wasim Sabbir, Md. Asadujjaman, Md. Abdus Samad, Kazi Ahsan Habib