Author:
Waiho Khor,Ikhwanuddin Mhd,Abualreesh Muyassar H.,Shu-Chien Alexander Chong,Ishak Sairatul Dahlianis,Jalilah Mohamad,Azmie Ghazali,Fazhan Hanafiah
Abstract
Sexual dimorphism is generally obvious in brachyurans, and sexual dimorphism between species is of a higher degree to allow separation of trophic niches compared to the lower intraspecific variations between sexes. Mud crab genus Scylla are distributed along the Indo-West Pacific region, and species within this genus often exhibit overlapping niches and similar external morphologies. This study compared the intra- and interspecific sexual dimorphism patterns of three sympatric Scylla species from four distinct geographical locations along the equatorial region based on 24 morphometric characters. The consistency of sexual dimorphism patterns between locations was higher than between species. However, reproduction-related characters such as cheliped dimensions and abdomen width (AW) exhibited similar sexual dimorphism patterns across species. Discriminant function analysis based on the 23 morphometric ratios revealed the morphometric intraspecific divergence in all three Scylla species from the Asajaya mangrove forest. The cause for this regional intraspecific differentiation of mud crabs from the Asajaya mangrove forest remains unknown.
Subject
Ocean Engineering,Water Science and Technology,Aquatic Science,Global and Planetary Change,Oceanography
Cited by
4 articles.
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1. 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;2022-09-08
2. APPENDAGE ABNORMALITIES IN THE EDIBLE MUD CRAB GENUS SCYLLA DE HAAN, 1833 (DECAPODA, BRACHYURA, PORTUNIDAE);CRUSTACEANA;2022
3. Limb loss and feeding ability in the juvenile mud crab Scylla olivacea: Implications of limb autotomy for aquaculture practice;Applied Animal Behaviour Science;2022-02
4. Population, Reproductive and Fishery Dynamics of Spotted Box Crab (Calappa philargius), a New Claw-Only Fishery Species, in the Southern Taiwan Strait, China;Frontiers in Marine Science;2021-10-21