ORCID Profile
0000-0003-1795-1315
Current Organisation
Macquarie University
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Publisher: Elsevier BV
Date: 06-2021
Publisher: Cold Spring Harbor Laboratory
Date: 16-10-2023
Publisher: Galenos Yayinevi
Date: 2018
Publisher: Wiley
Date: 21-04-2020
DOI: 10.1111/EEN.12876
Publisher: Wiley
Date: 06-07-2020
DOI: 10.1002/DDR.21709
Publisher: Wiley
Date: 12-06-2022
DOI: 10.1111/ETH.13315
Abstract: Sexual selection can improve population fitness and purge deleterious mutation from the gene pool by promoting condition‐dependent mate selection. One ecological factor that reduces in idual condition is parasitism. Parasitism tends to increase hosts' mutation load and likely indicates inferior host genetic quality. Parasite‐mediated selection, therefore, should favour the mating success of parasite‐resistant in iduals over parasitised in iduals. We tested this hypothesis in male Agriocnemis pygmaea damselflies, which are parasitised by Arrenurus water mites. We calculated frequency (i.e. the proportion of parasitism) and intensity (i.e. the number of parasites per parasitised in idual) of parasitism in free‐flying males and males in copula in seven natural populations. We predicted that males observed mating will be less likely to be parasitised than expected based on the frequency of parasitism in the population. We further predicted that parasite intensity would be lower in males caught in copula than single males. We found that parasitised males were significantly less likely to be found in copula than non‐parasitised males, independent of their occurrence frequency. However, there was no difference in the average parasite load between males captured in copula or free‐flying males. Our study shows that in addition to natural selection, sexual selection is a strong agent against parasitism and implies that it could promote local adaptation to counteract parasite driven extinction risks.
Publisher: Elsevier BV
Date: 2020
Publisher: Public Library of Science (PLoS)
Date: 23-04-2020
Publisher: Springer Science and Business Media LLC
Date: 04-08-2020
Publisher: Springer Science and Business Media LLC
Date: 02-06-2022
DOI: 10.1038/S41597-022-01364-9
Abstract: Trait databases have become important resources for large-scale comparative studies in ecology and evolution. Here we introduce the AnimalTraits database, a curated database of body mass, metabolic rate and brain size, in standardised units, for terrestrial animals. The database has broad taxonomic breadth, including tetrapods, arthropods, molluscs and annelids from almost 2000 species and 1000 genera. All data recorded in the database are sourced from their original empirical publication, and the original metrics and measurements are included with each record. This allows for subsequent data transformations as required. We have included rich metadata to allow users to filter the dataset. The additional R scripts we provide will assist researchers with aggregating standardised observations into species-level trait values. Our goals are to provide this resource without restrictions, to keep the AnimalTraits database current, and to grow the number of relevant traits in the future.
Publisher: Cold Spring Harbor Laboratory
Date: 03-08-2020
DOI: 10.1101/2020.08.03.233965
Abstract: Lepidoptera, butterflies and moths, are significant pollinators and ecosystem health indicators. Therefore, monitoring their ersity, distribution, and extinction risks are of critical importance. We aim to understand the drivers of the local extinction risks of the butterflies in Bangladesh. We conducted a systematic review to extract the ersity, distribution and local extinction risks of the butterflies of Bangladesh, and possible drivers of their extinction, e.g., body size, host plants and nectar plants. We updated the current checklist, which now consists of 463 species. We provided distribution and extinctions risk atlas showing both the ersity and extinction risks were highest in the eastern region of Bangladesh. We tested whether body size and host plants contribute to the local extinction risks of butterflies. We predicted butterflies with larger body size and fewer host plants and nectar plants would be in greater extinction risk. Accordingly, we showed that extinction risk was higher in larger butterflies than smaller butterflies, and in butterflies with a fewer number of host plants and nectar plants than the butterflies with higher number host plants. Our study highlights the contribution of body size and host plants as potential drivers of the local extinction risks of butterflies.
Publisher: Magnolia Press
Date: 08-09-2020
DOI: 10.11646/ZOOTAXA.4849.1.1
Abstract: A checklist of the dragonflies and damselflies occurring in Bangladesh, Bhutan, India (including Andaman and Nicobar Islands), Nepal, Pakistan and Sri Lanka is presented. In total 588 (including 559 full species) taxa are known to occur in the region of which 251 taxa (species & subspecies) are single country endemics. Recent taxonomic changes relevant to the area are summarized. Sixteen taxa are synonymized and a checklist of all synonyms established since 1950 is provided. Information is given on available larval descriptions including a list of genera present in the region for which no larvae have yet been described. Numerous species occurring in the area are still poorly known and a list of genera for which a revision is urgently needed is provided. The following new synonyms are established: Calicnemia sudhaae Mitra, 1994 = Calicnemia imitans Lieftinck, 1948 syn. nov. Ceriagrion fallax cerinomelas Lieftinck, 1927 = Ceriagrion fallax Ris, 1914 syn. nov. Ceriagrion fallax pendleburyi Laidlaw, 1931 = Ceriagrion fallax Ris, 1914 syn. nov. Coenagrion kashmirus Chowdhary & Das, 1975 = Ischnura forcipata Morton, 1907 syn. nov. Enallagma insula Fraser, 1920 = Aciagrion occidentale Laidlaw, 1919 syn. nov. Himalagrion pithoragarhicum Sahni, 1964 = Ceriagrion fallax Ris, 1914 syn. nov. Ischnura bhimtalensis Sahni, 1965 = Ischnura rubilio Selys, 1876 syn. nov. Onychargia indica Sahni, 1964 = Paracercion calamorum (Ris, 1916) syn. nov. Anaciaeschna kashmirense Singh & Baijal, 1954 = Anaciaeschna martini (Selys, 1897) syn. nov. Cyclogomphus vesiculosus Selys, 1854 = Cyclogomphus ypsilon Selys, 1954 syn. nov. Chlorogomphus brittoi Navás, 1934 = Chlorogomphus xanthoptera (Fraser, 1919) syn. nov. Hylaeothemis indica Fraser, 1946 = Hylaeothemis apicalis Fraser, 1924 syn. nov. Sympetrum durum Bartenef, 1916 = Sympetrum striolatum commixtum Selys, 1884 syn. nov. Sympetrum himalayanum Navás, 1934 = Sympetrum hypomelas (Selys, 1884) syn. nov. Sympetrum haematoneura Fraser, 1924 = Sympetrum speciosum Oguma, 1915 syn. nov. Sympetrum speciosum taiwanum Asahina, 1951 = Sympetrum speciosum Oguma, 1915 syn. nov. In addition, Periaeschna lebasi Navás, 1930 is regarded a nomen nudum. The following new combinations are proposed: Onychogomphus acinaces Laidlaw, 1922 is transferred to the genus Melligomphus Chao, 1990 resulting in Melligomphus acinaces (Laidlaw, 1922) comb. nov. Onychogomphus saundersii Selys, 1854 is transferred to the genus Nychogomphus Carle, 1986 resulting in Nychogomphus saundersii (Selys, 1854) comb. nov..
Publisher: Wiley
Date: 07-2020
DOI: 10.1111/EVO.14048
Publisher: Wildlife Information Liaison Development Society
Date: 26-09-2015
Publisher: Elsevier BV
Date: 08-2020
Publisher: Wildlife Information Liaison Development Society
Date: 26-12-2018
DOI: 10.11609/JOTT.4031.10.15.12995-13001
Abstract: An odonate survey was conducted throughout the southwestern region of Bangladesh, concentrating on eight districts and the Sundarban, from August 2014 to August 2016. A total of 50 species under 30 genera belonging to six families was recorded during the study period. Among these, 31 species belonged to Anisoptera and 19 to Zygoptera suborders. Libellulidae and Coenagrionidae were the most dominant anisopteran and zygopteran families with 28 and 17 species, respectively. One Zygoptera species Mortonagrion varalli was newly added to the odonate fauna of Bangladesh.
Publisher: Public Library of Science (PLoS)
Date: 08-07-2022
DOI: 10.1371/JOURNAL.PONE.0261540
Abstract: The prevalence and intensity of parasitism can have different fitness costs between sexes, and across species and developmental stages. This variation could arise because of species specific sexual and developmental differences in body condition, immunity, and resistance. Theory predicts that the prevalence of parasitism will be greater in in iduals with poor body condition and the intensity of parasitism will be greater in in iduals with larger body size. These predictions have been tested and verified in vertebrates. In insects, however, contradictory evidence has been found in different taxa. Here, we tested these predictions on two species of Agriocnemis ( Agriocnemis femina and Agriocnemis pygmaea ) damselflies, which are parasitized by Arrenurus water mite ectoparasites. We measured body weight, total body length, abdomen area and thorax area of non-parasitized damselflies and found body condition varied between males and females, between immature females and mature females and between A . femina and A . pygmaea . Then, we calculated the parasite prevalence, i.e., the absence or presence of parasites and intensity, i.e., the number of parasites per infected damselfly in eleven natural populations of both species. In line to our predictions, we observed greater prevalence in immature females than mature females but found no difference in parasite prevalence between males and females. Furthermore, we found that parasite intensity was higher in females than males and in immature females than mature females. Our result also showed that the frequency and intensity of parasitism varied between the two studied species, being higher in A . pygmaea than A . femina . Our study provides evidence that parasitism impacts sexes, developmental stages and species differentially and suggests that variation may occur due to sex, developmental stage, and species-specific resistance and tolerance mechanism.
Publisher: California Digital Library (CDL)
Date: 22-09-2023
DOI: 10.32942/X2JG72
Publisher: Cold Spring Harbor Laboratory
Date: 25-04-2020
DOI: 10.1101/2020.04.24.059543
Abstract: Zika virus (ZIKV), a mosquito-borne flavivirus, is now an emerging global public health concern. Currently, the pathogenicity, genetic ersity and the consequences of ZIKV infection are little known but a protective vaccine against ZIKV is an urgency. In this study, we have taken an immunoinformatics based approach to predict epitope cluster region in the whole proteome (3423 amino acids) of ZIKV. We have operated a range of bioinformatics algorithms to determine the epitopes of CD8+ cytotoxic T-cell (CTL), CD4+ helper T-cell (THL) and B cell. We have predicted an epitope cluster of 23 contiguous amino acids (region 1989-2011, WLEARMLLDNIYLQDGLIASLYR) residing on the protein NS3 helicase in ZIKV proteome. This epitope cluster contains fourteen CD4+ (THL) epitopes and six CD8+ (CTL) epitopes. The cluster region predicted to provide 93.86% population coverage worldwide. Finally, we have validated the epitopes by analysing their binding efficiency (binding energy within −4.7 to −6.9 kcal/mol) with specific HLA alleles. Based on our immunoinformatics analysis, we propose the peptide WLEARMLLDNIYLQDGLIASLYR as a new peptide vaccine candidate against Zika virus for further validation.
Publisher: Wildlife Information Liaison Development Society
Date: 26-08-2015
Publisher: Wildlife Information Liaison Development Society
Date: 26-11-2018
DOI: 10.11609/JOTT.3819.10.13.12821-12827
Abstract: A study was conducted in the eastern region of Bangladesh to contribute to the knowledge of the country’s Odonata fauna. A total of 75 species belonging to nine families was recorded during the study period from April 2014 to July 2016. Two zygopteran species, Calicnemia imitans and Prodasineura autumnalis, and one anisopteran species, Megalogomphus smithii, are new records for the country. The Megalogomphus genus is recorded for the first time from Bangladesh.
Publisher: The Royal Society
Date: 25-10-2023
Publisher: Cold Spring Harbor Laboratory
Date: 06-12-2021
DOI: 10.1101/2021.12.06.471459
Abstract: The prevalence and intensity of parasitism can have different fitness costs between sexes, and across species and developmental stages. This variation could arise because of species specific sexual and developmental differences in body condition, immunity, and resistance. Theory predicts that the prevalence of parasitism will be greater in in iduals with poor body condition and the intensity of parasitism will be greater in in iduals with larger body size. These predictions have been tested and verified in vertebrates. In insects, however, contradictory evidence has been found in different taxa. Here, we tested these predictions on two species of Agriocnemis ( Agriocnemis femina and Agriocnemis pygmaea ) damselflies, which are parasitized by Arrenurus water mite ectoparasites. We measured body weight, total body length, abdomen area and thorax area of non-parasitized damselflies and found body condition varied between males and females, between immature females and mature females and between A. femina and A. pygmaea . Then, we calculated the parasite prevalence, i.e., the frequency of parasitism and intensity, i.e., the number of parasites per infected damselfly in eleven natural populations of both species. In line to our predictions, we observed greater prevalence in immature females than mature females but found no difference in parasite prevalence between males and females. Furthermore, we found that parasite load was higher in females than males and in immature females than mature females. Our result also showed that the frequency and intensity of parasitism varied between the two studied species, being higher in A. pygmaea than A. femina . Our study provides evidence that parasitism impacts sexes, developmental stages and species differentially and suggests that variation may occur due to sex, developmental stage, and species-specific resistance and tolerance mechanism.
Publisher: Cold Spring Harbor Laboratory
Date: 06-02-2023
DOI: 10.1101/2023.02.06.526960
Abstract: Statistical analysis and data visualisation are integral parts of science communication. One of the major issues in current data analysis practice is an over-dependency on – and misuse of – p -values. Researchers have been advocating for the estimation and reporting of effect sizes for quantitative research to enhance the clarity and effectiveness of data analysis. Reporting effect sizes in scientific publications has until now been mainly limited to numeric tables, even though effect size plotting is a more effective means of communicating results, however, statistical software for plotting effect sizes is currently limited. We have developed the Durga R package to estimate and plot effect sizes. Durga allows users to estimate unstandardised and standardised effect sizes and bootstrapped confidence intervals of the effect sizes. The central functionality of Durga is to combine effect size visualisations with traditional plotting methods. Durga is a powerful statistical and data visualisation package that is easy to use, providing the flexibility to estimate effect sizes of paired and unpaired data using different statistical methods. Durga provides a plethora of options for plotting effect size, which allows users to plot data in the most informative and aesthetic way. Here, we introduce the package and its various functions. We further describe a workflow for estimating and plotting effect sizes using ex le data sets.
Publisher: Wiley
Date: 06-10-2019
DOI: 10.1111/ETH.12959
Publisher: Elsevier BV
Date: 08-2022
Publisher: Elsevier BV
Date: 10-2019
Publisher: MDPI AG
Date: 24-05-2021
DOI: 10.3390/NU13061784
Abstract: Mounting evidence support the potential benefits of functional foods or nutraceuticals for human health and diseases. Black cumin (Nigella sativa L.), a highly valued nutraceutical herb with a wide array of health benefits, has attracted growing interest from health-conscious in iduals, the scientific community, and pharmaceutical industries. The pleiotropic pharmacological effects of black cumin, and its main bioactive component thymoquinone (TQ), have been manifested by their ability to attenuate oxidative stress and inflammation, and to promote immunity, cell survival, and energy metabolism, which underlie erse health benefits, including protection against metabolic, cardiovascular, digestive, hepatic, renal, respiratory, reproductive, and neurological disorders, cancer, and so on. Furthermore, black cumin acts as an antidote, mitigating various toxicities and drug-induced side effects. Despite significant advances in pharmacological benefits, this miracle herb and its active components are still far from their clinical application. This review begins with highlighting the research trends in black cumin and revisiting phytochemical profiles. Subsequently, pharmacological attributes and health benefits of black cumin and TQ are critically reviewed. We overview molecular pharmacology to gain insight into the underlying mechanism of health benefits. Issues related to pharmacokinetic herb–drug interactions, drug delivery, and safety are also addressed. Identifying knowledge gaps, our current effort will direct future research to advance potential applications of black cumin and TQ in health and diseases.
Publisher: Cold Spring Harbor Laboratory
Date: 15-10-2019
DOI: 10.1101/804658
Abstract: Combining scientific data over a long-time period is necessary to understand the ersity, population trends, and conservation importance of any taxa in a global and regional scale. Bangladesh is located in a bio ersity hotspot region, however, till date, only few animal groups has been extensively investigated at a nation-wide scale. Although being one of the earliest and well-known insect groups, the knowledge on Odonata of this region remains rudimentary and dispersed. To resolve this issue, we have developed an online database for the Odonata of Bangladesh. We have compiled data from our last four years field study, from previously published research articles, field guides, and also collected data from citizen scientists regarding Bangladeshi odonates. Odonata of Bangladesh database ( www.odobd.org ) contains information on morphology, abundance, gene and protein sequences, local and global distribution and conservation status of the Odonata of Bangladesh. The database also demonstrates gender specified photographs with descriptions for better understanding for the novice researchers and naturalists. Odonata of Bangladesh database provides a comprehensive source for meta-analyses in ecology, conservation biology, and genetic research.
Publisher: Elsevier BV
Date: 09-2014
DOI: 10.1016/J.MOLIMM.2014.04.009
Abstract: Epitope-based vaccines permit the selection of only a specific subset of epitopes to induce the necessary immune response, thus providing a rational alternative to conventional design approaches. Using a range of immunoinformatics tools, we identified a novel, contiguous 28 amino acid multi-epitope cluster within the highly conserved secretory protein Ag85B of Mycobacterium tuberculosis, the causative agent of TB. This cluster, named Ep85B, is composed of epitopes which bind to three HLA Class I and 15 Class II molecules, and harbors the potential to generate 99% population coverage in TB-endemic regions. We experimentally evaluated the capacity of Ep85B to elicit T-cell immune responses using whole blood cells and, as predicted, observed significant increases in populations of both CD4+ and memory CD4+ CD45RO+ T-cells. Our results demonstrate the practical utility of an epitope-based design methodology - a strategy that, following further evaluation, may serve as an additional tool for the development of novel vaccine candidates against TB and other diseases.
No related grants have been discovered for Md Kawsar Khan.