Jahangirnagar University Journal of Biological Sciences最新文献

{"title":"Human-wildlife conflict along the edge of the Sundarbans mangrove forest in Satkhira, Bangladesh","authors":"Jannatul Ferdiousi, M. M. H Khan","doi":"10.3329/jujbs.v10i1-2.60849","DOIUrl":"https://doi.org/10.3329/jujbs.v10i1-2.60849","url":null,"abstract":"This paper describes the scenario of human-wildlife conflict along the edge of the Sundarbans mangrove forest in Satkhira, Bangladesh. In and around the Sundarbans mangrove forest human-wildlife conflict occurs in the category of crop and material damage, depredation of domestic animal, human laceration and human death. The animals that were mostly involved in human-wildlife conflict are tiger, crocodile, snake and monitor lizard. Due to humanwildlife conflict, a total of 172 people and 10 tigers died during the period 1990-2018. Among the total claimed human death, 97.6% (n=168) of victims were killed by tiger, 1.7% (n=3) by crocodile and 0.6% (n=1) by snake. On the other hand, among the killed tigers, the higher proportion (80%, n=8) was male and the lower proportion (20%, n=2) was female. Most of the victims (90%) were assaulted by tigers during hours of sunlight, mainly from 10:00 am to 12:00 pm (40%) and 7:00 am to 9:00 am (25%). The generation approaching middle age (age 45-59) were most commonly assaulted (33%), but the attack was also high in 30-44 age class (26%). The attacks on different professional classes comprise honey gatherers (60%), woodcutters (22%) and fishermen (18%). Tiger attacks mostly took place in Gabura (59%, n=98), Koikhali (21%, n=35), Ramjannagar (10%, n=18), Munshiganj (7%, n=11) and others places (3%, n=6). Rested on the evidence of killed (97.6%, n=168) and wounded (78%, n=247) humans by tigers, 60% of the killed people were partially consumed while 30 % were not consumed when the bodies of victims were recovered. Departed bodies were found to have been dragged a distance of 300-800 m inside the deep forest from the initial spot of attack. Human wildlife conflict hampers the animal conservation initiatives in the natural ecosystems and poses the most serious challenges to the persistence and survival of wildlife. Therefore, there is an urgent necessity to develop a conducive environment for all concerned stakeholders to rectify the situation, and to revive their capacities in the most productive and successful way. \u0000Jahangirnagar University J. Biol. Sci. 10(1 & 2): 59-70, 2021 (June & December)","PeriodicalId":259237,"journal":{"name":"Jahangirnagar University Journal of Biological Sciences","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122667026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Population, habitat use pattern and feeding behaviour of Irrawaddy squirrel (Callosciurus pygerythrus Geoffroy, 1831) in Jahangirnagar University campus","authors":"Jenia Samsad, M. M. Khan","doi":"10.3329/jujbs.v10i1-2.60844","DOIUrl":"https://doi.org/10.3329/jujbs.v10i1-2.60844","url":null,"abstract":"The study was conducted to know the population, habitat use pattern and feeding behaviour of Irrawaddy Squirrel (Callosciurus pygerythrus) in Jahangirnagar University Campus from October 2016 to September 2017. The population density had slightly varied in different months; it was the highest in May (997.58/km2) and the lowest in January (612.98/km2). The mean population density was 841.34/km2 (SD= 135.98). The visibility was the highest at 0900h (15.71%) and the lowest at 1100h (7.07%). The monthly variation was the highest in May (9.88%) and the lowest in January (6.07%), which was probably due to the change of temperature. In total 15 plant species were preferably occupied by the squirrels in Jahangirnagar University Campus. The most preferable tree species was Koroi (Albizia procera) and the frequency was the highest for it as 16.71% of the total sightings of squirrel were in and around Koroi tree. The middle canopy was mostly used (48%) by Irrawaddy Squirrel, followed by lower canopy (29%), upper canopy (10%) and ground (13%). In case of diurnal variation in feeding the highest rate of feeding was recorded in afternoon (at 1700h, 18.46%) and morning (at 0800h, 17.06%). Maximum time spent in feeding was in May 2017(17.40%) and minimum in January 2017 (2.52%). The major items of their diet included fruits and seeds for which they spent 39.4% and 25.4% time, respectively. According to the study, squirrels of Jahangirnagar University Campus were not distributed uniformly, but concentrated in some areas due to vegetation type, food availability and human presence. The study also revealed that the squirrels of Jahangirnagar University campus showed variation in their food choice, feeding behavior and habitat preference.\u0000Jahangirnagar University J. Biol. Sci. 10(1 & 2): 19-29, 2021 (June & December)","PeriodicalId":259237,"journal":{"name":"Jahangirnagar University Journal of Biological Sciences","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124966957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Occurrence of Enterobacteriaceae in medicinal plants sold in local markets of Savar, Dhaka","authors":"SM Rokon Ud Doula, Nazia Afrin, R. Shilpi","doi":"10.3329/jujbs.v10i1-2.60842","DOIUrl":"https://doi.org/10.3329/jujbs.v10i1-2.60842","url":null,"abstract":"Medicinal plants can be contaminated with a large diversity of potentially pathogenic bacteria. Ten medicinal plant samples Plantago psyllium, Terminalia bellirica, Terminalia chebula, Phyllanthus emblica, Ocimum basilicum, Glycyrrhiza glabra, Withania somnifera, Andrographis panicula, Bombax ceiba were collected from Amin Bazar and Savar of Savar area to study the presence and abundance of Enterobacteriaceae family bacteria in the herbal plant samples. A total of fifty five (55) bacterial isolates have been isolated from different medicinal plant samples using spread plate method on nutrient Agar media. Culture of bacterial isolate on a number of selective and differential media and biochemical tests (Catalase activity, hemolytic property, fermentation test, Starch hydrolysis, VP test, MR test, MIU test, Indole and casein test etc.) revealed the presence of different Enterobacteriaceae family bacteria in the plant samples. Out of 55 isolates 6 isolates were Salmonella sp. (11%), 2 isolates were Klebsiella sp. (3.63%) and 2 isolates were Enterobacter sp. (3.63%). Antibiotic sensitivity test of bacterial isolates showed that all the identified Enterobacteriaceae family bacteria were sensitive to Kanamycin but resistant to Amoxycilin, Aztreonam and Penicillin-G. Therefore, this study highlighted the necessity for constant quality assessment of herbal medicines to facilitate and ensure safe production and supply of medicinal products suitable for human consumption. \u0000Jahangirnagar University J. Biol. Sci. 10(1 & 2): 1-8, 2021 (June & December)","PeriodicalId":259237,"journal":{"name":"Jahangirnagar University Journal of Biological Sciences","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116083515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphological and molecular characterization of Aspergillus elegans from small indigenous dry fish ‘Jat Puti’ Puntius sophore (Hamilton 1822) in Bangladesh","authors":"Ismath Jahan Chanda, Ismot Ara, Roksana Sultana, N. Alam","doi":"10.3329/jujbs.v10i1-2.60846","DOIUrl":"https://doi.org/10.3329/jujbs.v10i1-2.60846","url":null,"abstract":"Small indigenous species (SIS) of fishes are available source of animal protein, vitamin and minerals, not commonly available in other foods in Bangladesh. These fishes are eaten both in fresh and dried condition. Puntious sophore was collected from different regions of Baikka Beel at Sreemangal Upazila, Moulvibazar district, Bangladesh to investigate mycoflora association with dried condition. Fungus was isolated from dried fish using tissue planting methods for classical and molecular characterization. Aspergillus elegans was identified through classical taxonomy and molecular approach based on ITS region of ribosomal DNA (rDNA) of fungi. For analyzing ITS4 and ITS5 were used. Mycelium of the identified fungus septated, hyaline, abundant and branched. Long, straight or flexous conidiophore were present. The molecular phylogeny in morphologically identified dry fish fungi of P. sophore such as A. elegans was studied based on their internal transcribed spacer (ITS). The sequences of ITS 600 bp region of A. elegans had 5.8S of rDNA sequences were identical. The highest mycelial growth was recorded in potato dextrose agar (PDA) medium for the growth and development of A. elegans. Temperature 30°C was optimum, this fungus grew well in pH 7. So, tested fungi grew well in neutral condition. \u0000Jahangirnagar University J. Biol. Sci. 10(1 & 2): 39-47, 2021 (June & December)","PeriodicalId":259237,"journal":{"name":"Jahangirnagar University Journal of Biological Sciences","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129055164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cultural conditions for mycelial growth and molecular identification of Mucor circinelloides based on ITS sequence","authors":"Nasrin Mahmuda, Sadia Afroj, Durga Dus Bhowmik, N. Alam","doi":"10.3329/jujbs.v10i1-2.60845","DOIUrl":"https://doi.org/10.3329/jujbs.v10i1-2.60845","url":null,"abstract":"Mucor circinelloides were isolated from post harvest infected papaya, which was collected from Savar region. M. circinelloides was identified by morphology and biology of fungus based on colony features, fungal mycelium, sporangia and sporagiospores as well as molecular approach. Mycelial colonies are floccose, pale greyish-brown. Sporangiophores were transparent, long, erect and shorter branches, 4.5-7 x 3.5-5 μm in size. Sporangia are hyaline, spherical, ranged from 20-80 μm in diameter. Columellae were hyaline, spherical to ellipsoidal up to 50 μm in diameter. The highest mycelial growth was recorded in potato dextrose agar (PDA) medium for the growth and development of M. circinelloides. Temperature 30°C was optimum. This fungus grew well in pH 7. So, tested fungi grew well in neutral condition. Complete dark condition was favourable for the vegetative growth of the fungus. The molecular phylogeny in morphologically identified post-harvest pathogenic fungi of papaya such as M. circinelloides were studied based on their ITS. The sequences of ITS region of M. circinelloides revealed that the total length was 620 bp and sequence analysis suggested that 5.8S of rDNA sequences were identical. \u0000Jahangirnagar University J. Biol. Sci. 10(1 & 2): 31-38, 2021 (June & December)","PeriodicalId":259237,"journal":{"name":"Jahangirnagar University Journal of Biological Sciences","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130213416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tree species diversity of the Kaptai National Park in Rangamati district, Bangladesh","authors":"M. Rahman, M. Rahman, Md. Kamrul Huda","doi":"10.3329/jujbs.v8i2.49837","DOIUrl":"https://doi.org/10.3329/jujbs.v8i2.49837","url":null,"abstract":"The purpose of this study was to estimate the tree biodiversity in the Kaptai National Park. The total area of the Kaptai National Park is about 4,564 ha (11,273.08 acres) under the jurisdiction of Rangamati South Forest Division, Rangamati Hill Tracts district. The study was conducted through extensive survey only on the tree species composition in the Kaptai National Park. During the investigation, a total of 65 tree species belonging to 29 families were recorded from the park. Among the plant families, Mimosaceae possessed the highest number of species (7) followed by Meliaceae (6), Ancardiaceae (5), Moraceae (4), Verbenaceae (4), Combretaceae (4), Myrtaceae (4), Dipterocarpaceae (3), Fabaceae (3), Rubiaceae (2), Bombacaceae (2), Caesalpiniaceae (2), Dilleniaceae (2) and Bignoniaceae (2) respectively. There were 15 families which contained single species. Tree species belonging to the family Mimosaceae was dominated in respect to number of species and their population as well. The findings of the present investigation will contribute in the regeneration of tree species in this degraded forest ecosystem and in the protection, conservation and sustainable management of the Kaptai National Park. \u0000Jahangirnagar University J. Biol. Sci. 8(2): 71-79, 2019 (December)","PeriodicalId":259237,"journal":{"name":"Jahangirnagar University Journal of Biological Sciences","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126904654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reduction of Arsenate in a new isolate of Bacillus megaterium","authors":"Md. Zahidul Islam, Mst Nusrat Jahan Arbi, Ripa Moni, U. S. Zohora, Farzana Zafor Nishat, Roksana Khanam, Mohammad Shahedur Rahman","doi":"10.3329/jujbs.v8i2.49839","DOIUrl":"https://doi.org/10.3329/jujbs.v8i2.49839","url":null,"abstract":"In Bangladesh, the ground water of almost all the 64 districts are contaminated with arsenic and in some regions the arsenic concentration is above the World Health Organization’s guideline value. Bioremediation is in demand for its removal from water especially in rural areas. In this study, four soil samples were collected from arsenic contaminated areas of Chandpur, Bangladesh. In total 58 bacterial strains resistant to arsenate were isolated. Among them I-34 has the highest arsenate reducing capability. This bacteria showed resistance to high concentration of arsenite (100 mM) and arsenate (300 mM). Its arsenate reducing enzyme is extracellular and showed highest activity at 60 °C. More interestingly, it showed auto-induction metabolism to produce arsenate reducing enzyme. Molecular characterization by 16S rDNA gene sequence analysis revealed that the bacterium is 100% identical to Bacillus megaterium. I-34 appears to be novel arsenic metabolizing bacteria within this genus. The bacterial isolate can be exploited for the study of possible bioremediation of arsenic containing water and have a potential impact to reduce the arsenate into arsenite form. \u0000Jahangirnagar University J. Biol. Sci. 8(2): 47-59, 2019 (December)","PeriodicalId":259237,"journal":{"name":"Jahangirnagar University Journal of Biological Sciences","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123232842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bioactivity evaluation of commercial root samples of Hemidesmus indicus (L.) R.Br.","authors":"F. Ferdouse, S. Mubassara, F. Ahmed","doi":"10.3329/jujbs.v8i2.49836","DOIUrl":"https://doi.org/10.3329/jujbs.v8i2.49836","url":null,"abstract":"Four commercial root samples (CS1, CS2, CS3 and CS4) of Hemidesmus indicus alongside an authentic sample (HI) were evaluated following antibacterial potential, cytototoxicity and DPPH free radical scavenging activity assay. The inhibition zones produced by commercial samples ranged between 9.5 to 13.5 mm against the tested bacteria in antibacterial sensitivity test. HI produced highest inhibition zone recorded as 20.63 mm against Staphylococcus aureus followed by 17.4 mm against Bacillus subtilis at 150 μg/ml concentration. HI also showed highest cytotoxicity with LC50 value of 1.726 mg/ml, 4.754 mg/ml and 13.247 mg/ml after 6 hours, 12 hours and 24 hours respectively in brine shrimp lethality assay. Sample CS1 and CS2 showed less cytotoxicity compared to CS3 and CS4. Depending on the concentration of extracts, the DPPH free radical scavenging activities of commercial samples were in close proximity with HI. The total phenolic content in HI was 54.52 mg/ml while in four commercial sample, it ranged between 52.28 to 75.37 mg/ml gallic acid equivalent (GAE) per 100 mg extract. \u0000Jahangirnagar University J. Biol. Sci. 8(2): 61-69, 2019 (December)","PeriodicalId":259237,"journal":{"name":"Jahangirnagar University Journal of Biological Sciences","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123045053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of citric acid and gamma radiation on the shelf life of Labeo bata (Hamilton, 1822)","authors":"-. Kamrunnahar, Md. Enamul Haque, Arzina Hossain, Mahfuza Islam, M. Munshi, K. Asaduzzaman, R. Huque","doi":"10.3329/jujbs.v8i2.49838","DOIUrl":"https://doi.org/10.3329/jujbs.v8i2.49838","url":null,"abstract":"The effects of citric acid (2%) and gamma radiation (1.0 and 1.5 kGy) on the quality and shelf life extension of Bata, Labeo bata (Hamilton, 1822) stored at refrigerated temperature (4°C) for 28 days were examined. Quality assessment were made by sensory (organoleptic scores), chemical (TV) and microbiological (TBC and TCC) evaluations. Organoleptic evaluation showed that irradiated samples were more acceptable than control and citric acid treated samples which also remained acceptable upto 28 days. TV of fish muscles increased with the increase of storage periods in all the samples. The rate of increase was lower in citric acid treated samples and the lowest was observed in samples with 1.5 kGy irradiation. Irradiated samples showed the best results in microbiological assessment. Gamma radiation in combination with low temperature (4°C) could increase the shelf life, and this technique may be applied for other fish species preservation. \u0000Jahangirnagar University J. Biol. Sci. 8(2): 25-33, 2019 (December)","PeriodicalId":259237,"journal":{"name":"Jahangirnagar University Journal of Biological Sciences","volume":"168 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121751549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Checklist of the pteridophytes of Narsingdi District, Bangladesh","authors":"Robayda Khanam, Saleha Khan, M. A. Rahim","doi":"10.3329/jujbs.v8i2.49834","DOIUrl":"https://doi.org/10.3329/jujbs.v8i2.49834","url":null,"abstract":"The occurrence of a total of 31 species of pteridophytes under 20 genera and 13 families in Narsingdi district were confirmed. Pteridaceae with 11 species was found as the largest family, which was followed by Salviniaceae and Polypodiaceae consisted of four species each and Thelypteridaceae with three species. Each of the rest nine families was represented by only one species. Pteris with six species was found as the largest genus, which was followed by Salvinia with three species, and Adiantum, Ceratopteris, Pyrrosia and Cyclosorus with two species each. Each of the rest 14 genera was represented by only one species. Among these species, 21 were found as terrestrial, two as both terrestrial and semiaquatic, four as aquatic and other four as epiphytic. The occurrence of Tectaria chattagrammica Ching, listed as DD (Data Deficient) in Red Data Book of Bangladesh, was common with natural regeneration in this district. \u0000Jahangirnagar University J. Biol. Sci. 8(2): 13-24, 2019 (December)","PeriodicalId":259237,"journal":{"name":"Jahangirnagar University Journal of Biological Sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130297128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}