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Articles by Harunur Rashid
Total Records ( 2 ) for Harunur Rashid
  Matiur Rahman , Harunur Rashid , Tanbir Ahmed , Mohiuddin Abdul Kader , Mahi Uddin Riaz , Mahbubul Hasan Rony and Alamgir Hossain
  Background and Objective: The gastrointestinal tracts of buffalo harbor a variety of helminthes, which cause clinical and sub clinical parasitism of buffalo. Epidemiological pattern of the helminths diseases would provide a basis for evolving strategic and tactical control of different diseases. By taking into consideration these points, authors were very interested to study about the epidemiological investigation of gastro-intestinal helminths infestation of swamp buffalo in Sylhet district. Materials and Methods: The study was conducted from the period of November, 2015 to October, 2016. For the purposes, total 947 buffalo’s faeces were collected and examined coprologically in the laboratory, Department of Medicine, Sylhet Agricultural University, Sylhet. All the collected data were entered to MS excel sheet and analyzed by using SPSS version 13. Results: A total of seven species of gastro-intestinal parasites were identified. The prevalence of Fasciola sp., Paramphistomum sp., Neoscaris sp., Strongyloides sp., Bunostomum sp., Moniezia sp. and Eimeria sp. were 32.02, 19.78, 8.38, 9.24, 10.53, 5.59 and 14.40%, respectively. The overall prevalence of GI parasite was 49.10%. From the epidemiological survey it was revealed that the prevalence of GI parasitic infestation was high in year round. The age, sex and season were highly enhancing the prevalent rate. Abundant rainfall, availability of intermediate host and other climatic condition enhanced the trematodal infestation in rainy season. The temperature and humidity become optimum for larval development of parasites and favorable for the migration and development of infective stages of snails. The female was affected much than that of male buffalo. The young were less susceptible than that of adult buffaloes. Conclusion: It’s an important study for the identification and factors analysis for the occurrence of GI parasites in Sylhet. Only routine deworming practices and hygienic management can minimize the parasitic load of buffaloes in this area.
  Arafat Siddiquee , Harunur Rashid , Md. Ariful Islam , Khan Kamal Uddin Ahmed and Md. Shahjahan
  The reproductive biology of an endangered fish species great snakehead (Channa marulius) was studied by gonadosomatic index (GSI) and histological analysis of ovaries and testis. Fishes were collected from the haor areas of greater Sylhet basin for a period of July 2011 to June 2012. For female the highest GSI (0.42) was in July and the lowest (0.018) was in January and March. Similarly, for male the highest GSI (0.056) was in July and the lowest (0.018) was in January. In the histological study, the premature (PM) and mature (M) stages of oocytes were observed in the ovaries of fish collected in June to July. The ovaries contained developing oocytes oogonia (OG) and perinuclear oocytes (PNO) in the August and subsequent month samples which were mostly spent. In testis high proportions of mature germ cells spermatids (SPT) and spermatozoa (SPZ) were observed in the July samples of C. marulius. In parallel to GSI, both the ovary and testis develop and mature synchronously. The present findings indicated that Channa marulius from Sylhet basin attains peak reproductive maturity in the month of June and July which revealed the breeding season of this species.
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