Variations in some Morphological Indicators of Tubuca rhizophorae Regarding Sex and Site at Bac Lieu and Ca Mau
Main Article Content
Abstract
This study was conducted to supplement information on the fluctuation of some morphological characteristics for species identification of Tubuca rhizophorae in some coastal provinces of the Mekong Delta. A total of 407 individuals (296 males and 111 females) were collected by hand in Bac Lieu and Ca Mau provinces from January 2024 to April 2024. The analysis results showed that Tubuca rhizophorae exhibited differences in manus width (MW3), pollex width (PW5), and dactyl width (DW7) between the two sampling sites (p<0.05). Specifically, MW3, PW5, DW7 values in Ca Mau and Bac Lieu were 1.55±0.01 and 1.62±0.02; 0.54±0.01 and 0.59±0.01; 0.48±0.01 and 0.53±0.01, respectively. Similarly, carapace width [CW(L-R) and CW(R-L)] and manus width (MW2) showed significant change with sex (p<0.05). Specifically, CW(L-R), CW(R-L), and MW2 of females and males were 12.30±0.10 and 12.99±0.08; 12.31±0.09 and 12.93±0.08; 1.03±0.02 and 1.17±0.03, respectively. The results also noted that environmental factors such as temperature, salinity, and pH displayed a positive relationship with morphological trait variations of this species.
Keywords:
Dactyl width, carapace width, manus width, pollex width, Tubuca rhizophorae.
References
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[3] M. A. Khan, K. Miyan, S. Khan, Morphometric Variation of Snakehead Fish, Channa punctatus, Populations from Three Indian Rivers, Journal of Applied Ichthyology, Vol. 29, No. 3, 2013, pp. 637-642.
[4] A. Kenthao, P. Jearranaiprepame, Morphometric Variations and Fishery Unit Assessment of Cyclocheilichthys apogon (Actinopterigii: Cyprinidae) from Three-Different Rivers in North-Eastern Thailand, Pakistan Journal of Zoology, Vol. 50, No. 1, 2018.
[5] M. J. Hopkins, C. L. Thurman, The Geographic Structure of Morphological Variation in Eight Species of Fiddler Crabs (Ocypodidae: genus Uca) from the Eastern United States and Mexico, Biological Journal of the Linnean Society, Vol. 100, No. 1, 2010, pp. 248-270.
[6] M. Tweedie, Grapsid Crabs from Labuan and Sarawak, Sarawak Museum Journal, Vol. 5, 1950, pp. 338-369.
[7] M. S. Rosenberg, The Systematics and Taxonomy of Fiddler Crabs: a Phylogeny of the Genus Uca, Journal of Crustacean Biology, Vol. 21, No. 3, 2001, pp. 839-869.
[8] M. Skov, M. Vannini, J. Shunula, R. Hartnoll, S. Cannicci, Quantifying the Density of Mangrove Crabs: Ocypodidae and Grapsidae, Marine Biology, Vol. 141, 2002, pp. 725-732.
[9] H. T. Shih, M. Prema, A. A. J. Kumar, N. U. Saher, S. Ravichandran, S. Odhano, G. Paulay, Diversity and Distribution of Fiddler Crabs (Crustacea: Brachyura: Ocypodidae) Around the Arabian Sea, Zoological Studies, Vol. 61, 2022, https://doi.org/10.6620/ZS.2022.61-65.
[10] L. E. A. Bezerra, H. M. Cascon, Population and Reproductive Biology of the Fiddler Crab Uca thayeri Rathbun, 1900 (Crustacea: Ocypodidae) in a Tropical Mangrove from Northeast Brazil, Acta Oecologica, Vol. 31, No. 3, 2007, pp. 251-258.
[11] Y. Qonita, Y. Wardiatno, N. A. Butet, Morphological Variation in Three Populations of the Pill Ark Cockle, Anadara pilula (Mollusca: Bivalve) of Java, Indonesia, Aquaculture, Aquarium, Conservation & Legislation, Vol. 8, No. 4, 2015, pp. 556-564.
[12] Q. M. Dinh, Aspects of Reproductive Biology of the Red Goby Trypauchen vagina (Gobiidae) from the Mekong Delta, Journal of Applied Ichthyology, Vol. 34, No. 1, 2018, pp. 103-110.
[13] Q. M. Dinh, T. H. D. Nguyen, Burrow Behaviour, Structure and Utilization of the Amphibious Mudskipper Periophthalmus chrysospilos Bleeker, 1853 in the Mekong Delta, Saudi Journal of Biological Sciences, Vol. 30, No. 2, 2023, pp. 103525.
[14] T. H. D. Nguyen, V. V. Ly, T. T. K. Nguyen, Q. M. Dinh, Spatiotemporal Variation in Fulton and Clark Indexes of Mystus albolineatus in the Vietnamese Mekong Delta:, Veterinary Integrative Sciences, Vol. 22, No. 3, 2024,
pp. 1173-1184.
[15] A. A. Hidayani, D. D. Trijuno, Y. Fujaya, M. T. Umar, The Morphology and Morphometric Characteristics of the Male Swimming Crab (Portunus pelagicus) from the East Sahul Shelf, Indonesia, Aquaculture, Aquarium, Conservation and Legislation, Vol. 11, No. 6, 2018, pp. 1724-1736.
[16] F. A. Pramithasari, N. A. Butet, Y. Wardiatno, Variation in Morphometric Characters in Four Sand Crab (Albunea symmysta) Populations Collected from Sumatra and Java Island, Indonesia, Tropical Life Sciences Research, Vol. 28, No. 1, 2017, pp. 103-115.
[17] L. U. Hepp, R. Fornel, R. M. Restello, A. Trevisan, S. Santos, Intraspecific Morphological Variation in a Freshwater Crustacean Aegla plana in Southern Brazil: Effects of Geographical Isolation on Carapace Shape, Journal of Crustacean Biology, Vol. 32, No. 4, 2012, pp. 511-518.
[18] J. R. Waldman, J. Grossfield, I. Wirgin, Review of Stock Discrimination Techniques for Striped Bass, North American Journal of Fisheries Management, Vol. 8, No. 4, 1988, pp. 410-425.
[19] S. Hausch, J. B. Shurin, B. Matthews, Variation in Body Shape Across Species and Populations in a Radiation of Diaptomid Copepods, Plos One, Vol. 8, No. 6, 2013, pp. e68272, https://doi.org/10.1371/journal.pone.0068272.
[20] E. M. Barría, R. D. Sepúlveda, C. G. Jara, Morphologic Variation in Aegla Leach (Decapoda: Reptantia: Aeglidae) from Central-Southern Chile: Interspecific Differences, Sexual Dimorphism, and Spatial Segregation, Journal of Crustacean Biology, Vol. 31, No. 2, 2011, pp. 231-239.
[21] A. C. Silva, M. Shapouri, R. Cereja, A. Dissanayake, C. Vinagre, Variations in Crab Claw Morphology and Diet Across Contrasting Inter‐Tidal Habitats, Marine Ecology, Vol. 38, No. 1, 2017, pp. e12374, https://doi.org/10.1111/maec.12374.
[22] M. Araújo, P. Coelho, D. Castiglioni, Relative Growth and Determination of Morphological Sexual Maturity of the Fiddler Crab Uca thayeri Rathbun (Crustacea, Ocypodidae) in Two Mangrove Areas from Brazilian Tropical Coast, Pan-American Journal of Aquatic Sciences, Vol. 7, No. 3, 2012, pp. 156-170.