Multivariate morphometric investigation to delineate species diversity and stock structure of mud crab Scylla sp. along the coastal regions of Bangladesh

Asaduzzaman, Md.; Jahan, Ismat; Noor, Aysha Rahi; Islam, Moudud; Rahman, Md. Moshiur

doi:10.1016/j.aaf.2020.03.010

Cited by 9 publications

(4 citation statements)

References 32 publications

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“…(2005) correctly identified 78 percent of six Clarias gariepinus stocks in a related experiment. Asaduzzaman et al. (2021) likely observed a high degree of accuracy in classifying the specimens into their original populations, with cross-validated classes of 100% and 97% for S. olivacea populations and 99% and 95% for S. serrata populations.…”

Section: Discussionmentioning

confidence: 97%

Phenotypic divergence and biometric indices of silond catfish, Silonia silondia (Hamilton 1822) populations inhabiting the coastal rivers of Bangladesh

Ullah

Rahman

Siddik

et al. 2022

Heliyon

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Section: Discussionmentioning

confidence: 97%

Phenotypic divergence and biometric indices of silond catfish, Silonia silondia (Hamilton 1822) populations inhabiting the coastal rivers of Bangladesh

Ullah

Rahman

Siddik

et al. 2022

Heliyon

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“…Naturally, four distinct mud crab species have been identified in the wild, namely, S. olivacea , S. serrata , S. paramamosain , and S. transquebarica on the basis of morphological and molecular data (Keenan et al., 1998). In Bangladesh, S. olivacea belongs to a bigger mud crab community than that of S. serrata (Asaduzzaman et al., 2021). Generally, the intertidal zones of mangrove forests and estuaries are the main shelters of mud crabs for feeding and breeding to introduce their next generations with a view to accelerating recruitment in the Indo‐Pacific region (Waiho et al., 2015).…”

Section: Introductionmentioning

confidence: 99%

Population dynamics of mud crab, Scylla olivacea (Herbst, 1796) from the Sundarbans of Bangladesh

Sakib

Ahmmed

Washim

et al. 2022

Aquaculture Fish & Fisheries

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The Sundarbans mangrove regions are the home of the mud crab (Scylla olivacea) business, as forest areas are potential places for random crab harvesting, trading, and exporting overseas seafood markets. Since the mud crab was being captured on a large‐scale in the wild for various purposes, estimation of population parameters were immediately done in terms of body weight and length‐frequency data collected from different locations in the forest of southwestern Bangladesh to understand the status of the stock. Recruitment pattern, growth parameters, mortality rates, and exploitation levels (E) were estimated to understand the population dynamics of S. olivacea. Asymptotic carapace widths (CW∝) were 14.70 and 14.18 cm, and growth co‐efficients (K) were 0.47 and 0.50 year–1 for male and female S. olivacea, respectively. The fishing mortalities were 2.32 and 1.13 year–1 and natural mortalities were 1.39 and 1.46 year–1 for males and females, respectively. Year‐round recruitment of this species takes place in the wild with a peak between June and November. The E for S. olivacea was found to be 0.63 for the male and 0.44 for the female. In summery, the stock of S. olivacea is found to be overexploited in the Sundarbans of Bangladesh. Therefore, mud crab resources should be taken into consideration under suitable fisheries management policies to conserve this national treasure in this delta. It is supposed that the findings will draw the attention of the scientists in the fields of aquatic biology, ecology, and management of the Sundarbans in restoring the mud crab population.

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“…In spite of its commercial interest and the declining status of populations, globally, knowledge of the genetics population structure of wild populations is limited to a few studies (Gopurenko, 1999, 2002a, b, Keenan, 1998, Xu, 2009. In Bangladesh, some studies accomplished were based on only culture (Begum, 2009, Ferdoushi & Xlang-guo, 2012, breeding (Sarower et al, 2012), biochemical composition (Sarower et al, 2013), taxonomic con rmation (Rouf et al, 2016, Sarower et al, 2017, morphometric analysis (Rouf et al, 2016, Asaduzzaman et al, 2020, marketing , Istiak, 2018, mud crab shery (Rahman et al, 2020), peak breeding season identi cation (Ali et al, 2020) but no report or research hitherto has been exposed yet to assess population dynamics, intraspeci c patterns of genetic variability and the population structure of S. olivacea using molecular genetic markers.…”

Section: Introductionmentioning

confidence: 99%

Genetic population structure of mud crab (Scylla olivacea) in the Bay of Bengal inferred from mitochondrial DNA and microsatellite markers

Sarower

Hasan

Okada

2022

Preprint

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The increasing exploitation of Scylla olivacea, one of the most commercially consumed mud crabs inhabiting mangroves and estuaries of the Bay of Bengal has been seriously experiencing a constant decline of its population. Information on its genetic population structure is crucial for the conservation of S. olivacea. Here, partial sequences of the mitochondrial cytochrome c oxidase subunit I (COI) gene and ten microsatellite loci were used to estimate population genetics from four localities in the Bay of Bangladesh. Genotypes of mitochondrial DNA (mtDNA) were identified with an 848 bp fragment sequence of COI gene, defining 32 different haplotypes from H1 to H32. H4 was the most frequently observed haplotype, existing in all four localities, while the majority of haplotypes were rare ones, existing in only one individual. Neutrality tests and mismatch analysis conferred a potential population expansion event for this crab species. Diploid genotypes were determined with microsatellite loci, delineating several alleles at each locus, significant linkage disequilibrium and deviation from Hardy-Weinberg equilibrium. The AMOVA analysis of mtDNA suggested a low level of genetic differentiation among four localities (FST = 0.0172, P > 0.05) while microsatellite markers showed a moderate genetic differentiation (FST = 0.0687, P > 0.05). The lower level of differentiation of mtDNA than microsatellites possibly resulted from female-mediated gene flow between populations, biased sex ratios, natural selection, or mutation.

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Multivariate morphometric investigation to delineate species diversity and stock structure of mud crab Scylla sp. along the coastal regions of Bangladesh

Cited by 9 publications

References 32 publications

Phenotypic divergence and biometric indices of silond catfish, Silonia silondia (Hamilton 1822) populations inhabiting the coastal rivers of Bangladesh

Phenotypic divergence and biometric indices of silond catfish, Silonia silondia (Hamilton 1822) populations inhabiting the coastal rivers of Bangladesh

Population dynamics of mud crab, Scylla olivacea (Herbst, 1796) from the Sundarbans of Bangladesh

Genetic population structure of mud crab (Scylla olivacea) in the Bay of Bengal inferred from mitochondrial DNA and microsatellite markers

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