145 research outputs found
Supplementary material to "Quantifying optimal resource allocation strategies for controlling epidemics" by Maity et al.
No full textThis supplementary material provides detailed mathematical and numerical analyses for the results presented in the paper "Quantifying optimal resource allocation strategies for controlling epidemics
Study the Socio-economic Status of Fishers of Egra-I Block of Purba Medinipur District, West Bengal, India
No full textThe present study was carried out to assess the socio-economic condition of fishermen of Egra-I block in Purba Medinipur district during the period from August 2022 to December 2022. The data were collected from 65 fishermen through survey sheet. The study was executed on the basis of personal interview. The study shows that most of the fishermen (95%) were Hindus, where 5% Muslims. The educational level of fishermen was very poor, 2% illiterate, 75% Primary pass, 15% Secondary pass and only 8% Higher Secondary pass. The housing condition of fishermen is maximum kutcha (65%), pucca (25%) and semi-pucca (10%). It was observed that there were 85% nuclear and 15% joint families. The annual income of fishermen varies from Rs.45,000 to Rs.1,00000. The main occupation of fishermen is the cultivation of paddy and ground nut. Fishing is the secondary occupation
Incorporating Sweet Lime Peel (Citrus limetta) Powder in Gold Fish (Carrasius auratus) Diets for Improvising Colour Stability in Home Aquarium
Get PDFThe ornamental fish industry is a rapidly growing sector, contributing significantly to global trade and aquaculture. Among various ornamental species, goldfish (Carassius auratus) is one of the most widely bred and aesthetically valued species due to their diverse coloration, adaptability, and ease of maintenance. The coloration of these ornamental fish is a critical factor influencing their marketability and consumer preference. The use of natural carotenoids in fish feed to intensify the colouration has become a preferable as well as profitable choice for fish farmers to meet the demand of radiant ornamental fish within budget. This study investigates the effect of sweet lime (Citrus limetta) peel powder as a natural dietary carotenoid source on the pigmentation and growth performance of ornamental goldfish (Carassius auratus). Goldfish were fed formulated diets supplemented with varying concentrations of sweet lime peel powder (50–150 g/kg i.e. 5−15%) over a 60-day period. Growth performance parameters, including weight gain, specific growth rate (SGR), and feed conversion ratio (FCR), were analysed parallelly with total carotenoid deposition in muscle and fins. Results indicate that fish fed with 8–10% dietary carotenoid supplementation showed optimal pigmentation enhancement and carotenoid deposition, while excessive supplementation beyond 12% showed reduced efficiency. Statistical analyses confirmed significant differences in carotenoid accumulation across treatments (p < 0.05), with peak deposition observed in the 10% supplementation group. However, no significant differences in growth performance were detected among treatment groups. Water quality parameters remained stable throughout the study, ensuring optimal rearing conditions. The findings highlight the efficacy of sweet lime peel as a cost-effective, natural carotenoid source for enhancing goldfish coloration without compromising growth or survival. This study contributes to sustainable aquafeed development by utilizing fruit waste for ornamental fish nutrition
Reproductive biology, maturation size and sex ratio of black tiger shrimp (Penaeus monodon Fabricius, 1798) from fishing grounds of Digha coast, West Bengal, India.
Get PDFThe present paper studies the reproductive biology, maturation size and sex ratio of Penaeus monodon collected from Digha fishing grounds, India during 2011-2013. A total of 633 individual of P. monodon were examined and among them 242 were males and 391 were females. The overall yearly sex ratio was observed to be 1:1.6 (males: females). Based on the results, the spawning season of P. monodon was mainly in January-February and was extended up to June. The first maturity was observed at 163.5 mm length. The estimated number of ova in the mature ovary ranged from 120155 to 961240 in P. monodon
Model-Based Estimation of Expected Time to Cholera Extinction in Lusaka, Zambia
No full textThe developing world has been facing a significant health issue due to cholera as an endemic communicable disease. Lusaka was Zambia’s worst affected province, with 5414 reported cases of cholera during the outbreak from late October 2017 to May 12, 2018. To explore the epidemiological characteristics associated with the outbreak, we fitted weekly reported cholera cases with a compartmental disease model that incorporates two transmission routes, namely environment-to-human and human-to-human. Estimates of the basic reproduction number show that both transmission modes contributed almost equally during the first wave. In contrast, the environment-to-human transmission appears to be mostly dominating factor for the second wave. Our study finds that a massive abundance of environmental vibrio’s with a huge reduction in water sanitation efficacy triggered the secondary wave. To estimate the expected time to extinction (ETE) of cholera, we formulate the stochastic version of our model and find that cholera can last up to 6.5–7 years in Lusaka if any further outbreak occurs at a later time. Results indicate that a considerable amount of attention is to be paid to sanitation and vaccination programs in order to reduce the severity of the disease and to eradicate cholera from the community in Lusaka
Study the present trawl fishery of Penaeus monodon (Fabricius, 1798) in coastal waters off Digha coast, West Bengal, India
Get PDFDuring the present study the average annual catch of Penaeus monodon during 2011 - 2013 was 281.29±9.67 ton, which contributed 0.41 % to the total trawl net catches at Digha coast. The average catch rate was 43.41 kg/h. The percentage of P. monodon to total shrimp catch was 1.91% in trawl landings at Digha coast. Monthly mean landings were 28.13±0.97 t from the trawl nets. Peak landings were observed from June to November with a maximum of 56.46±1.97 t in September and lean landings were observed from December to March with a minimum of 6.12±0.21 t
Length weight relationship and condition factor of Penaeus monodon (Fabricius, 1798) from Digha coast, West Bengal, India
Get PDFThe Indian Tiger prawn Penaeus monodon Fabricius 1798 is the largest species among the
penaeid prawns and is commonly known as “Jumbo Tiger Prawn” in the Indo-Pacific region
(Rao, 2013) [23]. In West Bengal it is known as Bagda chingdi. It is widely distributed in the
Indian waters but forms a substantial component of the prawn landings from the sea and the
estuaries of the east coast. P. monodon has been recorded in all the maritime states of India
(Mohamed, 1970) [18]
The nucleation of self-poled electroactive β-phase in Eu3+ doped PVDF nanocomposite film for optoelectronic devices
No full textPre-heating in the framework of massive gravity
No full textAbstractIn this paper we propose a mechanism of natural pre-heating of our universe by introducing an inflaton field dependent mass term for the gravitational wave for a specific class of massive gravity theory. For any single field inflationary model, the inflaton must go through the oscillatory phase after the end of inflation. As has recently been pointed out, if the gravitational fluctuation has inflaton dependent mass term, there will be a resonant amplification of the amplitude of the gravitational wave during the oscillatory phase of inflaton. Because of this large enhancement of the amplitude of the gravitational wave due to parametric resonance, we show that universe can naturally go through the pre-reheated phase with minimally coupled matter field. Therefore, during the reheating phase, there is no need to introduce any arbitrary coupling between the matter field and the inflaton
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