Landmark-based morphometric and meristic variations of freshwater garfish, Xenentodon cancila from four natural stocks of Southern Bangladesh

Abstract

Objective: The morphometric and meristic variations of Xenentodon cancila was studied based on the landmark-based truss network system to assess their phenotypic variations among four different freshwater stocks, viz . Boluhorpur baor , Jhenaidah (BBJ) ( n = 29); Bhairab River, Jashore (BRJ) ( n = 34); Arial Khan River, Madaripur (AKRM) ( n = 28), and Bohnni baor, Gopalganj (BBG) ( n = 25) in Bangladesh. Materials and methods: Seven meristic characters were counted by using a needle. Eight morphometrics and 28 truss measurements were measured by using tpsDigV.2.1 software. In meristic characters, Kruskal–Wallis test was performed to determine any significant differences, whereas, in morphometrics and truss measurements, univariate statistics and discriminant function analyses were carried out by using SPSS 22 version. Results: Significant differences were observed in four meristic characters among seven meristic characters in the Kruskal–Wallis test. In univariate statistics, only nine characters were observed significantly different among eight morphometrics and 28 truss measurements. The contribution of three discriminant function analyses (DFA), in which first DFA showed 49.2%, second DFA showed 33%, and third DFA showed 17.8% on behalf of both morphometric and truss measurements. In discriminant space, the four stocks were clearly separated. Two clusters were formed among four stocks, where BBG formed a single cluster, whereas BBJ and BRJ aggregately formed another cluster. Additionally, AKRM formed a sub-cluster with BBJ. Conclusion: The preliminary information generated from the current study would be beneficial for further genetic studies and in the assessment of ecological impacts on X. cancila stocks in Bangladesh.

Comparative growth and morphometric assessment between cultures of wild and hatchery-produced mud crabs

“…In our study, we did not find significant morphological variations between the wild- and hatchery-produced crabs. Nonetheless and despite the lack of significant differences in the current study, significant morphological variations among different wild fish stocks have been reported ( Mahfuj et al., 2019 ; Ahammad et al., 2018 ; Gain et al., 2017 ; Chaklader et al., 2016 ; Hossain et al., 2010 ; Turan et al., 2004 ; Swain et al., 1991 ). However, our study expected similar results between the wild- and hatchery-produced crablets due to their sourcing from the exact geographical location.…”

Untitled

“…This also not in tandem with the finding of Hossain et al (2010) with Labeo calbasu. Mahfuj et al (2019aMahfuj et al ( , 2019bMahfuj et al ( , 2019c detected similar results in Macrognathus pancalus, Xenentodon cancila, and Lepidocephalichthys guntea, respectively. The divergent of wild group based on morphological data has been hypothesized to be formed due to environmental and genetic factors (Allendorf & Phelps 1988;Nakamura et al 2003;Okomoda et al 2018;Solomon et al 2015).…”

Stock Structure Analysis of the Endangered Queen Loach, Botia dario (Hamilton 1822) from Five Rivers of Northern Bangladesh by Using Morphometrics: Implications for Conservation

“…Based on the TMR and ITNA, this study elucidated the variations amongst the stocks. Stock interpretation using conventional and truss-based morphometric characteristics was studied in a variety of species, including Nemipterus bipunctatus [61], Xenentodon cancel [62]. In this study, the PCA outlined the framework for ascribing each fish to a specific stock based on the variables of TMR and ITNA.…”