Keywords:
mud crab
mate choice
increment
bay of bengal
pattani bay

  • Abstract

    Size-assortative, nonrandom mate selection and periodic molting for growth, development, and reproduction have been observed in animals, including brachyuran crabs. This study investigated the mate selection of Scylla olivacea from four wild habitats in the Bay of Bengal, Bangladesh, and the molting dynamics of Scylla species in coastal mangroves of Pattani Bay, Thailand. A total of 34 pairs of S. olivacea were collected from four habitats in the Meghna Estuary, where 29 pairs (85%) of males were larger than 5 pairs (15%) of females. A higher abundance of mating pairs was observed in the rainy season (higher temperature and lower salinity) than in the winter season (lower temperature and higher salinity). Significant differences between sexes were found in carapace width (CW), internal carapace width (ICW), carapace length (CL), and body weight (BW). Male size and BW were significantly correlated with female sex. Morphometric traits differed significantly across habitats and seasons. The most frequent CW size class was 8.5–9.0 cm for males (34.3%) and 7.5–8.0 cm for females (26.5%). During molting, S. olivacea and S. paramamosain presented increases by 1.28 ± 0.48 and 1.35 ± 0.18 cm (CW), 0.93 ± 0.33 and 0.83 ± 0.15 cm (CL), and 0.54 ± 0.19 and 0.45 ± 0.17 cm (BH), respectively. No significant differences in molting increment were detected between species or sexes. Premolt size was positively correlated with increment but negatively correlated with percentage increment. These findings offer valuable biological insights for the ecological management and aquaculture practices of Scylla mud crabs.

  • References

    1. Alberts-Hubatsch, H., Lee, S. Y., Meynecke, J. O., Diele, K., Nordhaus, I., & Wolff, M. (2016). Life-history, movement, and habitat use of Scylla serrata (Decapoda, Portunidae): Current knowledge and future challenges. Hydrobiologia. https://doi.org/10.1007/s10750-015-2393-z
    2. Ali, M. Y., Hossain, M. B., Sana, S., Rouf, M. A., Yasmin, S., & Sarower, M. G. (2020). Identifying peak breeding season and estimating size at first maturity of mud crab (Scylla olivacea) from a coastal region of Bangladesh. Heliyon, 6, e04318. https://doi.org/10.1016/j.heliyon.2020.e04318
    3. Amin-Safwan, A., Muhd-Farouk, H., Mardhiyyah, M. P., Nadirah, M., & Ikhwanuddin, M. (2019). Does water salinity affect the level of 17β-estradiol and ovarian physiology of orange mud crab, Scylla olivacea (Herbst, 1796) in captivity? Journal of King Saud University - Science, 31, 827–835. https://doi.org/10.1016/j.jksus.2018.08.006
    4. Asmat-Ullah, M., Waiho, K., Azra, M. N., Norainy, M. H., Syafaat, M. N., Nahid, S. A. Al, Fazhan, H., & Ikhwanuddin, M. (2021). Induced mating of newly molted females of orange mud crab, Scylla olivacea (Herbst, 1796), in captivity. Aquaculture, 533, 736159. https://doi.org/10.1016/j.aquaculture.2020.736159
    5. Asmat-Ullah, M., Waiho, K., Fazhan, H., Ahmed, S., Abualreesh, M. H., Norainy, M. H., Nahid, S. A. Al, Ma, H., Peng, T. H., Rahman, M. M., & Ikhwanuddin, M. (2025). Reproductive performance of female orange mud crab, Scylla olivacea, based on body size and mating strategies. Aquaculture Reports, 42, 102718. https://doi.org/10.1016/j.aqrep.2025.102718
    6. Baylon, J. C. (2010). Effects of salinity and temperature on survival and development of larvae and juveniles of the mud crab, Scylla serrata (Crustacea: Decapoda: Portunidae). Journal of the World Aquaculture Society, 41, 858–873. https://doi.org/10.1111/j.1749-7345.2010.00429.x
    7. Christy, J. H. (1987). Female choice and the breeding behavior of the fiddler crab Uca beebei. Journal of Crustacean Biology, 7, 624–634. https://doi.org/10.2307/1548648
    8. Christy, J. H., & Wada, K. (2015). Social ethology in Brachyura. In Treatise on Zoology – Anatomy, Taxonomy, Biology of Crustacea (Vol. 9, Part C, pp. 417–468). https://doi.org/10.1163/9789004190832_010
    9. Clark, H. L., & Backwell, P. R. Y. (2016). Assortative mating in a fiddler crab. Behaviour, 153, 175–185. https://doi.org/10.1163/1568539X-00003333
    10. Dennenmoser, S., Christy, J. H., & Thiel, M. (2020). Rhythms and reproduction. In Reproductive biology. Oxford University Press.
    11. Embury, O., Merchant, C. J., Good, S. A., Rayner, N. A., Høyer, J. L., Atkinson, C., Block, T., Alerskans, E., Pearson, K. J., Worsfold, M., McCarroll, N., & Donlon, C. (2024). Satellite-based time-series of sea-surface temperature since 1980 for climate applications. Scientific Data, 11. https://doi.org/10.1038/s41597-024-03147-w
    12. Ewel, K. C., Rowe, S., McNaughton, B., & Bonine, K. M. (2009). Characteristics of Scylla spp. (Decapoda: Portunidae) and their mangrove forest habitat in Ngaremeduu Bay, Republic of Palau. Pacific Science, 63, 15–26. https://doi.org/10.2984/1534-6188(2009)63[15:COSSDP]2.0.CO;2
    13. Fatihah, S. N., Julin, H. T., & Chen, C. A. (2017). Survival, growth, and molting frequency of mud crab Scylla tranquebarica juveniles at different shelter conditions. AACL Bioflux, 10, 1581–1589.
    14. Fazhan, H., Azra, M. N., Halim, S. A., Naimullah, M., Abualreesh, M. H., Shu-Chien, A. C., Wang, Y., Fujaya, Y., Syahnon, M., Ma, H., Waiho, K., & Ikhwanuddin, M. (2022). Species composition, abundance, size distribution, sex ratios, and movement of Scylla mud crabs within the mangrove ecosystem at Setiu Wetland, Terengganu, Malaysia. Frontiers in Marine Science, 9. https://doi.org/10.3389/fmars.2022.899789
    15. Fazhan, H., Waiho, K., Darin Azri, M. F., Al-Hafiz, I., Norfaizza, W. I. W., Megat, F. H., Jasmani, S., Ma, H., & Ikhwanuddin, M. (2017a). Sympatric occurrence and population dynamics of Scylla spp. in equatorial climate: Effects of rainfall, temperature and lunar phase. Estuarine, Coastal and Shelf Science, 198, 299–310. https://doi.org/10.1016/j.ecss.2017.09.022
    16. Fazhan, H., Waiho, K., Wan Norfaizza, W. I., Megat, F. H., & Ikhwanuddin, M. (2017b). Assortative mating by size in three species of mud crabs, genus Scylla. Journal of Crustacean Biology, 37, 654–660. https://doi.org/10.1093/jcbiol/rux063
    17. Frommen, J. G., & Bakker, T. C. M. (2006). Inbreeding avoidance through non-random mating in sticklebacks. Biology Letters, 2, 232–235. https://doi.org/10.1098/rsbl.2005.0432
    18. Fujaya, Y., Rukminasari, N., Alam, N., Rusdi, M., Fazhan, H., & Waiho, K. (2020). Is limb autotomy really efficient compared to traditional rearing in soft-shell crab (Scylla olivacea) production? Aquaculture Reports, 18, 100432. https://doi.org/10.1016/j.aqrep.2020.100432
    19. Fukui, Y. (1995). The effects of body size on mate choice in a grapsid crab, Gaetice depressus (Crustacea, Decapoda). Journal of Ethology, 13, 1–8. https://doi.org/10.1007/BF02352556
    20. Gong, J., Yu, K., Shu, L., Ye, H., Li, S., & Zeng, C. (2015). Evaluating the effects of temperature, salinity, starvation and autotomy on molting success, molting interval and expression of ecdysone receptor in early juvenile mud crabs, Scylla paramamosain. Journal of Experimental Marine Biology and Ecology, 464, 11–17. https://doi.org/10.1016/j.jembe.2014.12.008
    21. Hajisamae, S., & Yeesin, P. (2014). Do habitat, month and environmental parameters affect shrimp assemblage in a shallow semi-enclosed tropical bay, Thailand? Raffles Bulletin of Zoology, 62, 107–114.
    22. Hajisamae, S., Soe, K. K., Maae, S., Chaymongkol, S., & John, A. (2025). Population structure and feeding habits of Carcinoscorpius rotundicauda in the bay environment, Southern Gulf of Thailand. Fisheries Research, 281, 107216. https://doi.org/10.1016/j.fishres.2024.107216
    23. Hamasaki, K. (2003). Effects of temperature on the egg incubation period, survival and developmental period of larvae of the mud crab Scylla serrata (Forskål) (Brachyura: Portunidae) reared in the laboratory. Aquaculture, 219, 561–572. https://doi.org/10.1016/S0044-8486(02)00662-2
    24. Hewitt, D. E., Niella, Y., Johnson, D. D., Suthers, I. M., & Taylor, M. D. (2022). Crabs go with the flow: Declining conductivity and cooler temperatures trigger spawning migrations for female giant mud crabs (Scylla serrata) in subtropical estuaries. Estuaries and Coasts, 45, 2166–2180. https://doi.org/10.1007/s12237-022-01061-1
    25. Hidir, A., Aaqillah-Amr, M. A., Mohd-Sabri, M., Mohd-Zaidi, I., Shahreza, M. S., Abualreesh, M. H., Peng, T. H., Ma, H., Waiho, K., Fazhan, H., Mukti, A. T., & Ikhwanuddin, M. (2022). Thermal tolerance of purple mud crab, Scylla tranquebarica (Fabricius, 1798), during egg incubation, larval rearing and juveniles’ production. Aquaculture Research, 53, 1481–1491. https://doi.org/10.1111/are.15682
    26. Hossain, M. S., Das, N. G., Sarker, S., & Rahaman, M. Z. (2012). Fish diversity and habitat relationship with environmental variables at Meghna River estuary, Bangladesh. Egyptian Journal of Aquatic Research, 38, 213–226. https://doi.org/10.1016/j.ejar.2012.12.006
    27. Ikhwanuddin, M., Azmie, G., Juariah, H. M., Zakaria, M. Z., & Ambak, M. A. (2011). Biological information and population features of mud crab, genus Scylla, from mangrove areas of Sarawak, Malaysia. Fisheries Research, 108, 299–306. https://doi.org/10.1016/j.fishres.2011.01.001
    28. Ikhwanuddin, M., Lan, S. S., Abdul Hamid, N., Fatihah Zakaria, S. N., Azra, M. N., Siti Aisah, A., & Abol-Munafi, A. B. (2015). The embryonic development of orange mud crab, Scylla olivacea (Herbst, 1796) held in captivity. Iranian Journal of Fisheries Sciences, 14, 885–895.
    29. Islam, M. K., Rahman, M. M., Rahman, M. H., Shuchi, Z. J., Nahar, M. S., Hasan, M. Z., Bari, E., & Islam, M. S. (2024). Stock assessment of the mud crab (Scylla olivacea) collected from the terrestrial edge of the Sundarbans mangrove forest, Bangladesh. Heliyon, 10, e39469. https://doi.org/10.1016/j.heliyon.2024.e39469
    30. Islam, M. R., Hajisamae, S., Pradit, S., Rouf, M. A., Maae, S., & Rensep, H. (2026). Comparative population parameters and stock assessment of three symmetric Scylla species in coastal waters of the Gulf of Thailand. Regional Studies in Marine Science, 94, 104756. https://doi.org/10.1016/j.rsma.2026.104756
    31. Islam, M. R., Hajisamae, S., Pradit, S., Rouf, M. A., Maae, S., & Rensep, H. (2025). Assessing the population dynamics and stock status of the orange mud crab Scylla olivacea (Herbst, 1796) in two oceanic coasts of Thailand. Thalassas: An International Journal of Marine Sciences, 41, 183. https://doi.org/10.1007/s41208-025-00933-0
    32. Jones, D. R., & Hartnoll, R. G. (1997). Mate selection and mating behaviour in spider crabs. Estuarine, Coastal and Shelf Science, 44, 185–193. https://doi.org/10.1006/ecss.1996.0210
    33. Kaewtubtim, P., Meeinkuirt, W., Seepom, S., & Pichtel, J. (2017). Occurrence of heavy metals and radionuclides in sediments and seawater in mangrove ecosystems in Pattani Bay, Thailand. Environmental Science and Pollution Research, 24, 7630–7639. https://doi.org/10.1007/s11356-016-8266-9
    34. Keenan, C. P., Davie, P. J. F., & Mann, D. L. (1998). A revision of the genus Scylla de Haan, 1833 (Crustacea: Decapoda: Brachyura: Portunidae). Raffles Bulletin of Zoology, 46, 217–245.
    35. Khaksari, H., Safaie, M., & Salarzadeh, A. (2023). Population dynamics and reproductive biology of Scylla serrata (Forskål, 1775) on the shores overlooking the mangrove forest of the Persian Gulf. Regional Studies in Marine Science, 57, 102758. https://doi.org/10.1016/j.rsma.2022.102758
    36. Kodama, K., Yamakawa, T., Shimizu, T., & Aoki, I. (2005). Age estimation of the wild population of Japanese mantis shrimp Oratosquilla oratoria (Crustacea: Stomatopoda) in Tokyo Bay, Japan, using lipofuscin as an age marker. Fisheries Science, 71, 141–150. https://doi.org/10.1111/j.1444-2906.2005.00941.x
    37. Koolkalya, S., Matchakuea, U., & Jutagate, T. (2016). Comparison of catch sizes and reproductive biology of mud crab species of the genus Scylla in coexisting populations in the eastern Gulf of Thailand. Journal of Agricultural Technology, 12, 1645–1655.
    38. Kuhapong, U., Tina, F. W., Limsakun, K., Watthanaphong, S., Luckban, E., & Piyakun, T. (2021). Temporal variations in the air, soil, and fiddler crab (Austruca perplexa) burrow temperatures in southern Thailand. Journal of Animal Behaviour and Biometeorology, 9, 2113. https://doi.org/10.31893/JABB.21013
    39. Kumalah, A. A., Wardiatno, Y., Setyobudiandi, I., & Fahrudin, A. (2017). Population biology of mud crab Scylla serrata (Forsskål, 1775) in mangrove ecosystem of Subang District, West Java. Jurnal Ilmu dan Teknologi Kelautan Tropis, 9, 173–184. https://doi.org/10.29244/jitkt.v9i1.17928
    40. Le Vay, L., Ut, V. N., & Walton, M. (2007). Population ecology of the mud crab Scylla paramamosain (Estampador) in an estuarine mangrove system: A mark-recapture study. Marine Biology, 151, 1127–1135. https://doi.org/10.1007/s00227-006-0553-4
    41. LeBlanc, G. A. (2007). Crustacean endocrine toxicology: A review. Ecotoxicology, 16, 61–81. https://doi.org/10.1007/s10646-006-0115-z
    42. Leoville, A., Lagarde, R., Grondin, H., Faivre, L., Rasoanirina, E., & Teichert, N. (2021). Influence of environmental conditions on the distribution of burrows of the mud crab, Scylla serrata, in a fringing mangrove ecosystem. Regional Studies in Marine Science, 43, 101684. https://doi.org/10.1016/j.rsma.2021.101684
    43. Liu, J., Chen, S., Ren, Z., Ye, Y., Wang, C., Mu, C., Wu, Q., & Shi, C. (2022a). Effects of diurnal temperature fluctuations on growth performance, energy metabolism, stress response, and gut microbes of juvenile mud crab Scylla paramamosain. Frontiers in Marine Science, 9. https://doi.org/10.3389/fmars.2022.1076929
    44. Liu, J., Shi, C., Ye, Y., Ma, Z., Mu, C., Ren, Z., Wu, Q., & Wang, C. (2022b). Effects of temperature on growth, molting, feed intake, and energy metabolism of individually cultured juvenile mud crab Scylla paramamosain in the recirculating aquaculture system. Water, 14, 2988. https://doi.org/10.3390/w14192988
    45. Lovatelli, A., Shelley, C., Tobias-Quinitio, E., Waiho, K., & Chan, D. (2025). Status, technological innovations, and industry development needs of mud crab (Scylla spp.) aquaculture. FAO. https://doi.org/10.4060/cd3976en
    46. Maae, S., Chuaduangpui, P., Rensep, H., Masniyom, P., Jantarat, S., Saengkaew, S., Iqbal, T. H., & Hajisamae, S. (2025). A comparative morphological analysis of three mud crab species (Scylla spp.) across two oceanic regions along the coastal waters of Thailand. Zoologischer Anzeiger, 318, 23–37. https://doi.org/10.1016/j.jcz.2025.07.006
    47. Maheta, N. P., & Vachhrajani, K. D. (2023). Burrow characteristics of the fiddler crab, Austruca sindensis (Alcock, 1900), from mudflats of Gulf of Khambhat, Gujarat, India. Arthropods, 12, 37–56.
    48. Manimaran, H., Chidambaram, P., Antony, C., Ravaneswaran, K., Uma, A., Velmurugan, R., & Joshna, M. (2025). Effect of salinity regimes on growth performance, digestive enzyme activity and histological structure of Scylla serrata. Indian Journal of Animal Research. https://doi.org/10.18805/ijar.b-5670
    49. Meynecke, J. O., Grubert, M., Arthur, J. M., Boston, R., & Lee, S. Y. (2012). The influence of the La Niña–El Niño cycle on giant mud crab (Scylla serrata) catches in northern Australia. Estuarine, Coastal and Shelf Science, 100, 93–101. https://doi.org/10.1016/j.ecss.2012.01.001
    50. Mhd, I., Ghazali, A., Nahar, S. F., Wee, W., Azra, M. N., Abol-Munafi, A. B., & Ikhwanuddin, M. (2018). Testis maturation stages of mud crab (Scylla olivacea) broodstock on different diets. Sains Malaysiana, 47, 427–432. https://doi.org/10.17576/jsm-2018-4703-01
    51. Ng, T. P. T., & Williams, G. A. (2014). Size-dependent male mate preference and its association with size-assortative mating in a mangrove snail, Littoraria ardouiniana. Ethology, 120, 995–1002. https://doi.org/10.1111/eth.12271
    52. Nurcahyono, E., Sri Widodo, M., Wilujeng Ekawati, A., Soetanti, E., & Besar Perikanan Budi Daya Air Payau, B. (2024). Tidal study of hormonal conditions related to puberty molting in mating behavior of mud crab Scylla serrata. Egyptian Journal of Aquatic Biology and Fisheries, 28, 1197–1210. https://doi.org/10.21608/ejabf.2024.374134
    53. Oliveira, R. F., & Custódio, M. R. (1998). Claw size, waving display and female choice in the European fiddler crab, Uca tangeri. Ethology Ecology & Evolution, 10, 241–251. https://doi.org/10.1080/08927014.1998.9522855
    54. Pati, S. G., Paital, B., Panda, F., Jena, S., & Sahoo, D. K. (2023). Impacts of habitat quality on the physiology, ecology, and economical value of mud crab Scylla sp.: A comprehensive review. Water, 15, 2029. https://doi.org/10.3390/w15112029
    55. Rahman, M. M., Islam, M. A., Haque, S. M., & Wahab, A. (2017). Mud crab aquaculture and fisheries in coastal Bangladesh. World Aquaculture, 48, 47–52.
    56. Rahman, M., Rima, S. A., Saha, S. K., Saima, J., Hossain, M. S., Tanni, T. N., Bakar, M. A., & Siddique, M. A. M. (2022). Pollution evaluation and health risk assessment of heavy metals in the surface water of a remote island Nijhum Dweep, northern Bay of Bengal. Environmental Nanotechnology, Monitoring & Management, 18, 100706. https://doi.org/10.1016/j.enmm.2022.100706
    57. Reading, K. L., & Backwell, P. R. Y. (2007). Can beggars be choosers? Male mate choice in a fiddler crab. Animal Behaviour, 74, 867–872. https://doi.org/10.1016/j.anbehav.2006.09.025
    58. Rouf, M. A., Shahriar, S. I. M., Antu, A. H., & Siddiqui, M. N. (2021). Population parameters of the orange mud crab Scylla olivacea (Herbst, 1796) from the Sundarban mangrove forest in Bangladesh. Heliyon, 7, e06223. https://doi.org/10.1016/j.heliyon.2021.e06223
    59. Rouf, M. A., Shahriar, S. I. M., Sarower, M. G., & Ahsan, M. N. (2016). Taxonomic clarification of mud crab species of genus Scylla (Brachyura: Portunidae) available in the coastal regions of Bangladesh. Asian Fisheries Science, 29. https://doi.org/10.33997/j.afs.2016.29.3.001
    60. Sakib, M. H., Ahmmed, S., Washim, M. R., Islam, M. L., & Chowdhury, P. (2022). Population dynamics of mud crab, Scylla olivacea (Herbst, 1796) from the Sundarbans of Bangladesh. Aquaculture, Fish and Fisheries, 2, 224–232. https://doi.org/10.1002/aff2.42
    61. Sal Moyano, M. P., Gavio, M. A., & Luppi, T. A. (2012). Mating system of the burrowing crab Neohelice granulata (Brachyura: Varunidae) in two contrasting environments: Effect of burrow architecture. Marine Biology, 159, 1403–1416. https://doi.org/10.1007/s00227-012-1917-6
    62. Sal Moyano, M. P., Silva, P., Luppi, T., & Gavio, M. A. (2014). Female mate choice by chemical signals in a semi-terrestrial crab. Journal of Sea Research, 85, 300–307. https://doi.org/10.1016/j.seares.2013.05.015
    63. Sanda, T., Shimizu, T., Iwasaki, T., Dan, S., & Hamasaki, K. (2022). Effect of temperature on survival, intermolt period, and growth of juveniles of two mud crab species, Scylla paramamosain and Scylla serrata (Decapoda: Brachyura: Portunidae), under laboratory conditions. Nauplius, 30. https://doi.org/10.1590/2358-2936e2022012
    64. Sara, L. (2010). Study on the size structure and population parameters of mud crab Scylla serrata in Lawele Bay, Southeast Sulawesi, Indonesia. Journal of Coastal Development, 13, 133–147.
    65. Sarker, M. S. H. (2021). Regional spatial and temporal variability of rainfall and temperature over Bangladesh and the northern Bay of Bengal. Environmental Challenges, 5, 100309. https://doi.org/10.1016/j.envc.2021.100309
    66. Sarower, M. G., Shahriar, S. I. M., Nakamura, H., Rouf, M. A., & Okada, S. (2017). Taxonomic confirmation of mud crab species (genus Scylla) in Bangladesh by nuclear and mitochondrial DNA markers. Mitochondrial DNA Part A: DNA Mapping, Sequencing, and Analysis, 28, 935–940. https://doi.org/10.1080/24701394.2016.1214726
    67. Serdiati, N., Safir, M., Sunarti, & Tahya, A. M. (2025). Do lunar cycles affect molting of mud crabs Scylla olivacea reared in a closed recirculation system? International Journal of Aquatic Biology, 13, 15–22. https://doi.org/10.22034/ijab.v13i1.2386
    68. Shaha, D. C., Hasan, J., Kundu, S. R., Yusoff, F. M., Salam, M. A., Khan, M., Haque, F., Ahmed, M., Rahman, M. J., & Wahab, M. A. (2022). Dominant phytoplankton groups as the major source of polyunsaturated fatty acids for hilsa (Tenualosa ilisha) in the Meghna estuary, Bangladesh. Scientific Reports, 12, 1–18. https://doi.org/10.1038/s41598-022-24500-2
    69. Skov, M. W., Vannini, M., Shunula, J. P., Hartnoll, R. G., & Cannicci, S. (2002). Quantifying the density of mangrove crabs: Ocypodidae and Grapsidae. Marine Biology, 141, 725–732. https://doi.org/10.1007/s00227-002-0867-9
    70. Slatyer, R. A., Jennions, M. D., & Backwell, P. R. Y. (2012). Polyandry occurs because females initially trade sex for protection. Animal Behaviour, 83, 1203–1206. https://doi.org/10.1016/j.anbehav.2012.02.011
    71. Soe, K. K., Maae, S., Jaafar, Z., Chuaduangpui, P., Jantarat, S., & Hajisamae, S. (2024). Plastic ingestion by three species of Scylla (Brachyura) from the coastal areas of Thailand. Marine Pollution Bulletin, 198, 115914. https://doi.org/10.1016/j.marpolbul.2023.115914
    72. Syafaat, M. N., Azra, M. N., Mohamad, F., Che-Ismail, C. Z., Amin-Safwan, A., Asmat-Ullah, M., Syahnon, M., Ghazali, A., Abol-Munafi, A. B., Ma, H., & Ikhwanuddin, M. (2021). Thermal tolerance and physiological changes in mud crab, Scylla paramamosain crablet at different water temperatures. Animals, 11, 1146. https://doi.org/10.3390/ani11041146
    73. Tahya, A. M., Arief, M. Z. J., Boediono, & Suprayudi, M. A. (2016). Important role of mandibular organ in molting, growth, and survival of mud crab Scylla olivacea. International Journal of ChemTech Research, 9, 529–533.
    74. Tina, F. W., & Muramatsu, D. (2020). Size-dependent mating preference of the male fiddler crab Austruca perplexa. Ethology, 126, 68–75. https://doi.org/10.1111/eth.12961
    75. Tina, F. W., & Muramatsu, D. (2022). Males signal their breeding burrow characteristics to females in the fiddler crab Austruca perplexa. Behaviour, 159, 1045–1062. https://doi.org/10.1163/1568539X-bja10165
    76. Tina, F. W., Jaroensutasinee, M., & Jaroensutasinee, K. (2018). Receiver female body size and distances affect the claw-waving rate of signaller males in fiddler crabs (Brachyura, Ocypodidae). Behaviour, 155, 905–914. https://doi.org/10.1163/1568539X-00003510
    77. Tina, F. W., Jaroensutasinee, M., Keeratipattarakarn, K., & Jaroensutasinee, K. (2018). Surface mating influences chimney/burrow characteristics of Uca rosea (Tweedie, 1937) (Brachyura, Ocypodidae) in southern Thailand. Crustaceana. https://doi.org/10.1163/15685403-00003747
    78. Tsuji, L. J. S., DeIuliis, G., Hansell, R. I. C., Kozlovic, D. R., & Sokolowski, M. B. (2000). Non-random mating in classical lekking grouse species: Seasonal and diurnal trends. International Journal of Biometeorology, 44, 134–140. https://doi.org/10.1007/s004840000057
    79. Vay, L. Le. (2001). Ecology and management of mud crab Scylla spp. Asian Fisheries Science. Asian Fisheries Society.
    80. Viswanathan, C., Pravinkumar, M., Suresh, T. V., Elumalai, V., & Raffi, S. M. (2019). Reproductive biology of the orange mud crab Scylla olivacea (Herbst, 1796) from the Pichavaram mangroves of south-east India. Indian Journal of Fisheries, 66. https://doi.org/10.21077/ijf.2019.66.1.82235-04
    81. Waiho, K., Mustaqim, M., Fazhan, H., Wan Norfaizza, W. I., Megat, F. H., & Ikhwanuddin, M. (2015). Mating behaviour of the orange mud crab, Scylla olivacea: The effect of sex ratio and stocking density on mating success. Aquaculture Reports, 2, 50–57. https://doi.org/10.1016/j.aqrep.2015.08.004
    82. Xu, W. B., Zhang, Y. M., Li, B. Z., Lin, C. Y., Chen, D. Y., Cheng, Y. X., Guo, X. L., Dong, W. R., & Shu, M. A. (2023). Effects of low salinity stress on osmoregulation and gill transcriptome in different populations of mud crab Scylla paramamosain. Science of the Total Environment, 867, 161522. https://doi.org/10.1016/j.scitotenv.2023.161522
    83. Yao, H., Li, X., Chen, Y., Liang, G., Gao, G., Wang, H., Wang, C., & Mu, C. (2021). Metabolic changes in Scylla paramamosain during adaptation to an acute decrease in salinity. Frontiers in Marine Science, 8, 734519. https://doi.org/10.3389/fmars.2021.734519
    84. Zafar, M., Amin, S. M. N., & Rahman, M. M. (2006). Population dynamics of mud crab (Scylla serrata) in the southeastern coastal region of Bangladesh. Asian Fisheries Science, 19, 43–50. https://doi.org/10.33997/j.afs.2006.19.1.005
    85. Zaidi, Z. M., Hilmi, M. G., Ikhwanuddin, M., & Bachok, Z. (2011). Population dynamics of mud crab, Scylla olivacea, from Setiu Wetland areas, Terengganu, Malaysia. In Empowering science, technology and innovation toward a better tomorrow (pp. 34–38).
    86. Zeng, C. (2007). Induced out-of-season spawning of the mud crab, Scylla paramamosain (Estampador) and effects of temperature on embryo development. Aquaculture Research, 38, 1478–1485. https://doi.org/10.1111/j.1365-2109.2007.01826.x
    87. Zhang, Y., Huang, Z., Zhou, Y., Ma, H., Saqib, H. S. A., Su, Q., Cui, W., & Ma, H. (2022). The effects of different diet, salinity and light condition on growth performance and moulting cycle of juvenile mud crab, Scylla paramamosain. Aquaculture Research, 53, 6333–6342. https://doi.org/10.1111/are.16106
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Islam, M. R., Pradit, S., Maae, S., & Hajiamae, S. (2026). Size-assortative mate selection and molting increment of <em>Scylla </em> mud crabs in wild coastal mangrove habitats. Journal of Animal Behaviour and Biometeorology, 14(2), 2026010. https://doi.org/10.31893/jabb.2026010
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