Authors' Contribution SZ conducted research work. MH conceived idea, supervised the research work, wrote the manuscript and performed data analysis. KA helped in the write up. MFM helped in improving the manuscript and data analysis. RK provided silk seed and technical support. SL and MK helped in silkworm rearing and data collection.

Hymenoptera, Coleoptera, and Diptera are the most studied taxa (Noriega et al., 2018). Coleoptera contributes significantly in the ecosystem services i.e. pollinators, predators and decomposers. Dung beetles (Coleoptera: Scarabaeidae) are involved in decomposition of dung pats (Nadeau et al., 2015). The dung beetle fauna has been studied for ecosystem functioning, as indicators of anthropogenic disturbances and global change (Nichols et al., 2008;Nichols et al., 2009). Families of beetles associated with

The purpose of this article is to review the genetic basis of mulberry silkworm to understand the mystery of silk production and the silkworm’s role as a model organism. Data regarding mulberry silkworm’s genetic diversity, genetic bases of silk production, gene mapping and chromosomal properties was reviewed. Findings illustrated that genetic variability exists among mulberry silkworms of different geographical regions. Hence, it acts as an indicator of the genetic bases of silk production since it is higher in males, although sex is primarily determined by females. Studies have revealed that chromosomes in mulberry silkworm are holocentric and gene mapping provides an insight into the accurate location of silk genes on chromosomes. It is concluded that the genetic study of silkworm is useful due to its commercial and economic significance and it is the crucial need of sericulture industry to enhance its output by collecting information about superior silkworm breeds. Hence, further research should be carried out to explore the hidden facts about mulberry silkworm.

The aim of the current review is to deliberate on arsenic chemistry, its existence in aquatic ecosystem and its effects on the biological systems of fishes which are regarded as potential indicators for any change in water quality. Water is a major storehouse of arsenic which is present in the form of arsenate and arsenite. Anthropogenic activities including unlimited application of arsenic pesticides, industrial activities and mining operations have increased the universal incidence of soluble arsenic above tolerable levels of 0.010 mg/L. Variations in fish behaviour, growth rate, haematological and biological parameters and organ systems have been observed in arsenic contaminated water. Data regarding these parameters indicate that the fish shows aggressive behaviour and its weight increases due to a high arsenic uptake. The production rate of biochemical compounds like carbohydrates, proteins and lipids is reduced due to arsenic bonding with their precursors. Among organ systems, skin is a highly affected organ, while muscles are the least affected due to high arsenic concentration. Low concentration of arsenic results in bioaccumulation, conspicuously in liver and kidney, upon incessant exposure to freshwater fish. This bioaccumulation turns into biomagnification and becomes the cause of lethal diseases in human beings, such as hyperglycaemia, diminution of enzymatic activities and immune system abnormalities. Keeping in view all of these above mentioned facts, it is imperative to take action against excessive arsenic usage and to develop its eco-friendly management ways.

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