Subhas Sarkar

• PhD
• Researcher at Central Institute of Freshwater Aquaculture

The barred spiny eel, Macrognathus pancalus, is a high-value food fish with significant market demand but limited aquaculture due to the absence of a defined culture protocol. Health monitoring is crucial for early disease detection, risk assessment, and optimizing rearing conditions and disease management. Hence, this study evaluated the health st...

Small indigenous fish species (SIS) are a rich source of essential nutrients, including proteins, vitamins, and minerals, making them a vital component of rural diets. Despite their nutritional significance, SIS are often undervalued and excluded from aquaculture in favor of larger commercial species. This study highlights an initiative by ICAR-CI...

Algaecide property of leaf aqueous extracts (LAEs) of three plants viz., Azadiracta indica, Tridax procumbens, Calotropis procera as well as two indigenous technologies (ITKs) viz., application of neem oil and cow urine were evaluated against wild Microcystis bloom and pure culture of Microcystis aeruginosa in laboratory. Five treatments were desig...

High‐density fingerling rearing of pengba was conducted for 90 days in biofloc system (BFS) to study the effect of stocking density on growth, feed utilization, water quality, water use efficiency and health of animals. The study was conducted in 12 continuously aerated tanks (50 m3), grouped into four treatments T‐1, T‐2, T‐3 and T‐4, which were s...

Carbon footprint analysis for different freshwater aquaculture practices in different states of India along with Bay of Bengal was done. In West Bengal, the average inputs as carbon equivalent (CE) were [Formula: see text][Formula: see text]kg/ha with an average output of [Formula: see text][Formula: see text]kg live weight/ha. In Odisha, the input...

The Green House Gas Emission (GHGs) from the carp culture ponds (n = 12) of West Godavari, Krishna, and Guntur districts of Andhra Pradesh and from the ponds (n = 4) of Moyna, East Medinipur district of West Bengal, India was assessed through carbon storage and carbon footprint analysis. The average inputs as Carbon Equivalent (CE) were 14407 ± 265...

Contaminant removal from water involves various technologies among which adsorption is considered to be simple, effective, economical, and sustainable. In recent years, nanocomposites prepared by combining clay minerals and polymers have emerged as a novel technology for cleaning contaminated water. Here, we provide an overview of various types of...

The excessive and indiscriminate uses of carbon (C) and nitrogen (N) through feed, fertilizers and manures in aquaculture ponds could play a vital role in the emission of greenhouse gases such as carbon dioxide (CO 2), methane (CH 4), and nitrous oxide (N 2 O). Therefore, it is important to know about the distributions of N and C in the aquaculture...

The presence of various inorganic and organic pollutants in aquatic streams has readily increased as a result of industrialization and urbanization. Among the technologies available, adsorption has widely been used for the removal of various contaminants from aqueous media, and accordingly different adsorbents have already been prepared over the ye...

We surveyed the fish farmers of five states, viz. Andhra Pradesh, Karnataka, Gujarat, Odisha and West Bengal of India for adaptation and mitigation strategies of climate change impact in freshwater aquaculture. In monsoon period especially when the cyclone occurred, overall 9% fish farmers responded regarding fish migration from one pond to another...

2017 Elsevier Inc. There is a growing concern about climate change, and soils have attracted significant research attention as a sink for atmospheric CO 2 . Mechanisms of soil organic carbon (SOC) stabilization have received much focus recently due to its relevance in controlling the global C cycle. The purpose of this chapter is to review our exis...

In this work, we aimed to study the trend of the annual and seasonal mean rainfall and temperature of India over the period of 1901–2014. The long-term trend of rainfall and temperature was evaluated by linear regression and Mann–Kendall test. The magnitude of the trend was assessed by Sen’s Slope. In the last 30 years, the annual and summer rainfa...

Knowledge on the fate and transport of heavy metals is essential for predicting the environmental impact of metal contamination on agricultural soils. This chapter presents an overview of various factors that are involved in controlling the retention and mobility of heavy metals in soils with a special reference to soil mineralogy. The bioavailabil...

Agricultural practices involving intensive applications of chemical fertilizers can be harmful to the environment. Soil amendments can serve as an alternative source of plant nutrients and simultaneously improve the physical, chemical and biological properties of soils. Many soil amendments are produced from organic and inorganic waste materials. T...

There is a growing concern about climate change, and soils have attracted significant research attention as a sink for atmospheric CO2. Mechanisms of soil organic carbon (SOC) stabilization have received much focus recently due to its relevance in controlling the global C cycle. The purpose of this chapter is to review our existing knowledge of soi...

Soil needs simultaneous replenishment of various nutrients to maintain its inherent fertility status under extensive cropping systems. Replenishing soil nutrients with commercial fertilizer is costly. Among various fertilizers, deposits of potassium (K) ore suitable for the production of commercial K fertilizer (KCl) are distributed in few northern...

Soil needs simultaneous replenishment of various nutrients to maintain its inherent fertility status under extensive cropping systems. Replenishing soil nutrients with commercial fertilizer is costly. Among various fertilizers, deposits of potassium (K) ore suitable for the production of commercial K fertilizer (KCl) are distributed in few northern...

A leaching study was conducted to evaluate effectiveness of fertilizer loaded nanoclay/superabsorbent polymer composites (NCPCs) as a slow release carrier of nutrients. Three types of NCPCs (I, II and III) synthesized from Kaolinite, Illite and Smectite dominated nanoclays, respectively were loaded separately with di-ammonium phosphate (DAP) and ur...

Water and nutrients are two important inputs to agriculture that need to be used judiciously with higher efficiency to save these limited resources. For these purposes, a series of nanoclay–polymer composite (NCPC) superabsorbent nutrient carriers were prepared. These NCPCs were based on the reactions of different types of nanoclays (10 wt %) with...

Soil available nutrients are very sensitive to change in response to management practices, and are considered to be chemical indicators of soil quality. The present investigation was conducted using two tillage managements for rice (puddled and not puddled) and wheat (conventional tillage and no-tillage), three water managements and nine nutrient m...

The main aim of this research was to study the P and N releasing behaviour from fertilizer loaded nanoclay superabsorbent polymer composite (NCPC) and to test its effectiveness as a carrier of slow release fertilizer using pearl millet (Pennisetum glaucum) as test crop grown under Inceptisols. Results revealed that availability of Olsen P, 0.01M Ca...

The hypothesis is that the exfoliated and dispersed nanoclay in the superabsorbent polymer matrix controls the rate of diffusion of ions /molecules out of absorbed water by the polymer matrix. The objective of the study was to assess the P and N release from fertilizer loaded nanoclay superabsorbent polymer composite (NCPC) and to test its potentia...