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Biology subjects

Yunus, M.

Publications and source records attributed to Yunus, M..

3 recordsLinked to original sources

Winter Foraging Selectivity of Blackbuck in Semi-Arid Agricultural Landscapes

The blackbuck (Antilope cervicapra), a native grazer of the Indian subcontinent, is increasingly confined to semi-arid, human-modified landscapes. Understanding its seasonal foraging patterns is essential for conservation planning in such habitats. This study examined winter dietary preferences of blackbuck across three agro-pastoral sites--Palla Salu, Rathgaon, and Sikandra Rao--in Aligarh district, Uttar Pradesh, India. Vegetation sampling recorded 4,125 plant individuals, with Prosopis juliflora and Cynodon dactylon dominating the landscape. However, micro-histological analysis of 45 fecal pellet samples identified 18 distinct plant species "comprising a total of 860 identifiable fragments". Of these, C. dactylon, Poa annua, Rumex pulcher, and Atriplex patula were significantly preferred. Despite high field abundance, P. juliflora was consistently avoided, likely due to structural or chemical deterrents. Interestingly, rare species such as Chenopodium vulvaria were overrepresented in the diet, suggesting nutrient-specific selectivity. Bonferroni-adjusted confidence intervals confirmed significant foraging preferences across all sites. These findings highlight the blackbucks adaptive and selective winter feeding strategy and the crucial role of native grasses and forbs during resource-scarce periods. We recommend the control of invasive species and restoration of native forage to enhance habitat quality and support long-term blackbuck conservation in fragmented, human-dominated ecosystems.

animal behavior and cognition↗

Tubewell use protects against rotavirus infection during the monsoons in an urban setting

Rotavirus, a diarrheal pathogen spread via fecal-oral transmission, is typically characterized by a winter incidence peak in most countries. Unlike for cholera and other water-borne infections, the role of environmental and socioeconomic factors on the spatial variation of rotavirus seasonality remains unclear. Here, we analyze their association with rotavirus seasonality, specifically the odds of monsoon cases, across 46 locations from 2001 to 2012 in Dhaka. Drinking water from tubewells, compared to other sources, has a clear protective effect against cases during the monsoon, when flooding and water contamination are more likely. This finding supports a significant environmental component of transmission.

epidemiology↗

Co-occurring eQTLs and mQTLs: detecting shared causal variants and shared biological mechanisms

Inherited genetic variation impacts local gene expression and DNA methylation in humans. Expression and methylation quantitative trait loci (cis-eQTLs and cis-mQTLs) often occur at the same genomic location, suggesting a common causal variant and shared mechanism. Using DNA and RNA from peripheral blood of Bangladeshi individuals, we use \"co-localization\" methods to identify 3,695 eQTL-mQTL pairs that are likely to share a causal variant. Using partial correlation analysis and mediation analysis, we identify >500 pairs with evidence of a causal relationships between expression and methylation (i.e., shared mechanism) with many additional pairs that we are underpowered to detect. These co-localized pairs are enriched for SNPs showing opposite effects on expression and methylation, although a many affect multiple CpGs in opposite directions. Evidence of shared SNP-age interaction also supports shared mechanisms for two eQTL-mQTL pairs. This work demonstrates the pervasiveness of co-regulated expression and methylation traits in the human genome. This approach can be applied to other types of molecular QTLs to enhance our understanding of regulatory mechanisms.

genomics↗