Our Nature最新文献

{"title":"Taxonomical Studies of Three Species of an Epiphytic Alga Coleochaete Bréb. with Ecological Notes in West Bengal, India","authors":"Nilu Halder","doi":"10.3126/ON.V13I1.14204","DOIUrl":"https://doi.org/10.3126/ON.V13I1.14204","url":null,"abstract":"During taxonomical study of Coleochaete  Breb., an epiphytic alga , three species viz . Coleochaete nitellarum  Jost, Coleochaete pulvinata  A. Br. ex Kutz., Coleochaete soluta  (Breb.) Pringsh. belonging to the order Chaetophorales under the class Chlorophyceae were recorded in the winter season from three sites of Hooghly district in West Bengal, India. The thallus of C . nitellarum grew diffusely on the submerged angiospermic plants and consists of irregularly branched prostrate filaments. In C . soluta , the erect filaments were freely branched while, upper cells of erect filaments were cylindrical and thallus was hemispherical in C . pulvinata .  The most important finding of the limnological work was the higher concentration of DO in the lentic aquatic ecosystems where they occurred that might be due to higher rate of photosynthetic activities and lower temperature of water. This study also exhibited somewhat, lower nutrient status in respect of NO 3 -N: PO 4 3- : K ratios. The review of literatures revealed that C . pulvinata was the second time report and other two taxa were reported third timely from this state. Our Nature (2015), 13(1): 19-25","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"45 1","pages":"19-25"},"PeriodicalIF":0.0,"publicationDate":"2015-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79715143","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":"Conservation Priorities of NTFP Species in Dry Deciduous Forests of Adilabad District, Telangana, India","authors":"Omkar Kanneboyena, S. Suthari, A. Ragan, V. Raju","doi":"10.3126/ON.V13I1.14202","DOIUrl":"https://doi.org/10.3126/ON.V13I1.14202","url":null,"abstract":"Non-Timber Forest Products (NTFPs) have been used by ethnic and non-ethnic people for their food, shelter, medicine and commerce in Adilabad district of Northern Telangana. Over exploitation of the products has reduced the economic plant taxa and led to the loss of plant species which are essential for ecosystem diversity. The availability and distribution of the 16 NTFP species studied are not uniform in the district as per the phytosociological study. They are prioritized into three categories on the basis of score attained in the devised scale. Among these, Firmiana simplex, Givotia mulaccana, and Aegle marmelos shall receive the highest conservation priority, followed by Madhuca longifolia var. latifolia, Dendrocalamus strictus at moderate level while Terminalia bellerica, Syzygium cumini and Tamarindus indica are of low category which do not require much conservation attempt. Our Nature (2015), 13(1): 1-7","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"29 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2015-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76550055","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":"Water Quality Parameters for the Culture of Rainbow Trout, Oncorhynchus mykiss (Walbaum) in the Raceways of Kathmandu, Nepal","authors":"R. P. Bhagat, S. Barat","doi":"10.3126/ON.V13I1.14209","DOIUrl":"https://doi.org/10.3126/ON.V13I1.14209","url":null,"abstract":"Eighteen water quality parameters (5 physical, 9 chemical, 2 climatic and 2 geographical) were investigated for the water quality assessment so as to know whether water in the raceways from spring-fed torrential stream at a high altitude was feasible and suitable for the culture of rainbow trout, Oncorhynchus mykiss (Walbaum) or not. Results indicated colourless, odourless, and crystal-clear water throughout the year with air temperature ranging from 11.4-26.9 (20.3±1.1 o C), water temperature 8.4-21.5 (16±1.1 o C), water velocity 1.5-3.5 (2.5±0.11m sec -1 ), water discharge 37-92 (56±2.87L sec -1 ), turbidity 3-19 (11± 1.04NTU), pH 6.5-8.2 (7.44±0.11), electrical conductivity 35-204 (112.13±11.2µS cm -1 ), dissolved oxygen 5.9-10.5 (8.2±0.3mg L -1 ), free carbon dioxide 1.4-5.1 (3.6±0.2mg L -1 ), total alkalinity 17-97 (55.1±5.32mg L -1 ), total hardness 11-90 (47±5.06mg L -1 ), phosphate-P 0.01-0.50 (0.14±0.02mg L -1 ), ammonium-N 0.09-0.91 (0.28 ±0.04mg L -1 ), nitrate-N 0.01-0.83 (0.17±0.04mg L -1 ), relative humidity 62.4-88.7 (75.01±1.59%), rainfall 0.0-503.4 (132.44±32.83mm), altitude 1550msl, and water resource stream-fed torrential stream. Correlation analyses of the parameters showed strongest correlation at the significance level of 0.01. All parameters were positively correlated except pH, electrical conductivity, dissolved oxygen, total alkalinity, and total hardness which were negatively correlated with rest. Parameters of the first year were slightly higher than second due to fluctuation in temperature, velocity and discharge, relative humidity, and rainfall influenced by climatic factors, geography, seasons, and environment of the origin and occurrence of the water resource, thus affecting rest of the parameters. Water velocity and water discharge could be maintained as per requirement of the culture. These parameters were within permissible limits being feasible and suitable for rainbow trout culture. Our Nature (2015), 13(1): 50-57","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"1 1","pages":"50-57"},"PeriodicalIF":0.0,"publicationDate":"2015-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79832882","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":"Osteology of Hyrcanian crested loach, Paracobitis hircanica (Pisces, Nemacheilidae)","authors":"H. Azimi, H. Mousavi-Sabet, S. Eagderi","doi":"10.3126/ON.V13I1.14203","DOIUrl":"https://doi.org/10.3126/ON.V13I1.14203","url":null,"abstract":"This study was carried out to describe of osteological structure of the newly described crested loach, Paracobitis hircanica Mousavi-Sabet et al ., 2015. For this purpose, ten specimens were collected from the Zaringol River, in the southeastern Caspian Sea basin. After clearing and staining, osteologicl characteristics were examined. The obtained results showed that the P. hircanica is osteologicaly characterized by plate-like protrusion in epibranchial-4, no sesamoid ossifications, five hypurals, free and long epural, no connection between retroarcticulare and dental, loss of preethmoideum-I and basibranciale-4, alveolar bony capsule and presence of the manubrium. Our Nature (2015), 13(1): 8-18","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"79 1","pages":"8-18"},"PeriodicalIF":0.0,"publicationDate":"2015-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90683432","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":"Systematics of Nepalese Termitomyces","authors":"H. Aryal, U. Budathoki","doi":"10.3126/ON.V13I1.14207","DOIUrl":"https://doi.org/10.3126/ON.V13I1.14207","url":null,"abstract":"The genus Termitomyces is obligate symbiont fungus with the termite, which grows on termatoria. This paper highlights new records of Termitomyces aurantiacus (R. Heim) R. Heim , T. badius Otieno , T. le-testui (Pat.) R. Heim , T. microcarpus f. santalensis Heim and T. schimperi (Pat.) R. Heim reported for the first time from Nepal. The collection area lies 26°44'08\"-29°06'32\"N latitude and 80°18'02\"-88°08'27\"E longitude within an altitudinal range of 60-3000 msl. The collection during 2010-2012 from reserve forest and the specimens have been deposited in the Natural History Museum (NHM), Tribhuvan University, Kathmandu, Nepal. Our Nature (2015), 13(1): 31-44","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"1 1","pages":"31-44"},"PeriodicalIF":0.0,"publicationDate":"2015-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89323599","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 Prolonged Starvation on Cholesterol Content of Gonads in Clarias batrachus","authors":"N. K. Prasad","doi":"10.3126/ON.V13I1.14205","DOIUrl":"https://doi.org/10.3126/ON.V13I1.14205","url":null,"abstract":"Starvation is experienced in most species of fish during certain periods of every year largely due to environmental conditions and it affects different organs in different ways. The present paper deals with the impact of starvation on cholesterol content of gonadal tissues of a fresh water catfish, Clarias batrachus . The level of cholesterol in the gonads has been found higher in female than in male under both the normal and starved conditions. Both the male and female gonads showed non-significant depletion up to 20 days of starvation but thereafter, it was sharp. After 40 days of starvation, the cholesterol depleted about 84% in male and 79% in female of their normal values. Our Nature (2015), 13(1): 26-30","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"10 1","pages":"26-30"},"PeriodicalIF":0.0,"publicationDate":"2015-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74404626","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":"Inventory of Rare, Endangered and Threatened (RET) Plant Species in Maruthamalai Hills, Western Ghats of Tamilnadu, South India","authors":"B. Subbaiyan, P. Samydurai, M. Prabu, R. Ramakrishnan, V. Thangapandian","doi":"10.3126/ON.V12I1.12255","DOIUrl":"https://doi.org/10.3126/ON.V12I1.12255","url":null,"abstract":"The present study deal with identification of rare, endanger and threatened plants in Maruthamalai Hills, part of Southern Western Ghats of Coimbatore District, Tamilnadu. In this investigation 30 rare, endangered and threatened (RET) plant species belongs to 15 families were identified and documented. Names of plants and RET category was gathered from IUCN annual reports and standard research articles. Enumerated plants were categorized in rare, endangered, endemic and threatened, species such as Caralluma bicolor , Terminalia arjuna , Ceropegia juncea , Rubia cordifolia , Celastrus paniculatus , Gloriosa suberpa, Gymnema sylvestres and so on. Finally it has been suggested that the RET medicinal plants are need to be proper conservation and management plans before it lost forever.  DOI: http://dx.doi.org/10.3126/on.v12i1.12255 Our Nature (2014), 12(1): 37-43.","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"44 8 1","pages":"37-43"},"PeriodicalIF":0.0,"publicationDate":"2015-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72994442","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":"Fish Marketing System in Southern Bangladesh: Recommendations for Efficient Marketing","authors":"M. Ali, Md. Mosaddequr Rahman, M. Hossain, M. Rahman, Md. Alomgir Hossen, S. Naser, R. Islam, B. R. Subba, Z. Masood, M. A. Hoque","doi":"10.3126/ON.V12I1.12254","DOIUrl":"https://doi.org/10.3126/ON.V12I1.12254","url":null,"abstract":"This study aimed to explore the marketing channel, marketing cost and marketing margin and problems associated with fish marketing in order to provide recommendations for efficient fish marketing system in Barisal city, southern Bangladesh. Data were collected from seven fish markets of Barisal, southern Bangladesh including Port road fish market, Taltoli bazar fish market, Chaumatha fish market, Notullabad bus stand fish market, Kasipur bazar fish market and Bazar road fish market. Both primary and secondary data were used during 1 year study period from May, 2011 to April, 2012. Primary data were collected through field surveys and pre-structured questionnaire was used for interviewing of 10 organizers, 20 aratdars (commission agent), 50 fish traders and 100 consumers. Secondary source of information consists of published materials such as journals, textbooks, newspapers and also from interviewing different government and non-government officials and members of various fisheries related cooperative societies. The results of this study revealed 11 fish marketing channels in Barisal city’s fish marketing system. The average marketing cost ranged from 4.15% to 8.33% (6.76±0.98) % of the final retail price. The highest and lowest average fish price were recorded as USD 7.07/kg and USD 1.03/kg for giant fresh water prawn and silver carp, correspondingly. Intermediaries’ marketing margin on different species’ marketing fluctuated from 29.6% to 50.28% (39.38±5.22) % for silver carp and brown shrimp marketing, respectively. Establishment of modern fish landing center and retail markets near the fish landing port, introduction of government fish shops and  insulated and refrigerated fish vans and fish carriers, training of all personnel related to fish marketing about fish handling, quality of fish, hygiene practices, improvement of existing fish market structure, provision for government and private funding assistance for fishers/fish farmer, formulation and enactment of independent act/ordinance for fish landing and marketing are highly recommended.  DOI: http://dx.doi.org/10.3126/on.v12i1.12254 Our Nature (2014), 12(1): 28-36","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"123 1","pages":"28-36"},"PeriodicalIF":0.0,"publicationDate":"2015-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79171917","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":"Comparative evaluation of Carp testis as an alternative to 17 α-Methyltestosterone on Tilapia sex reversal","authors":"N. Khanal, M. Shrestha, S. Rai, R. Bhujel","doi":"10.3126/ON.V12I1.12251","DOIUrl":"https://doi.org/10.3126/ON.V12I1.12251","url":null,"abstract":"17 α-Methyltestosterone (MT) is a commonly used synthetic androgen for the all male tilapia fry production. The probable residual effect of MT on human health and environment has been a concern. Two trials for two seasons were conducted to evaluate the effectiveness of carp testis (CT), as a source of natural androgen, on sex reversal of Nile tilapia ( Oreochromis niloticus ) and compare it with MT at Department of Aquaculture, Agriculture and Forestry University, Nepal,using completely randomised block deign (RCBD). Altogether 8 treatments with 4 for methyltestosterone (40 mg MT kg -1 of diet) and 4 for 75% rohu ( Labeo rohita ) testis. Both source of androgen were fed for 15, 18, 21 or 24 days. Treatments were replicated thrice. The result of methyltestosterone feeding for 24 days showed significantly (p 0.05) with 24 days and also with 15 days CT treatment but the result of 24 days CT feeding was significantly higher (91.4 ±1.2)  than 15 days (82.5 ±2.7) of carp testis feeding. DOI: http://dx.doi.org/10.3126/on.v12i1.12251 Our Nature (2014), 12(1): 1-7","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"CE-26 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2015-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84566942","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":"Provitamin A Maize Development: A Strategy for Fighting against Malnutrition in Nepal","authors":"J. Shrestha, T. Karki","doi":"10.3126/ON.V12I1.12256","DOIUrl":"https://doi.org/10.3126/ON.V12I1.12256","url":null,"abstract":"This review paper briefly highlights the importance, challenges and opportunities for adoption of provitamin A rich maize, and potential breeding strategies suitable in the context of Nepal. The biofortified maize with provitamin A could be the convenient, cheaper, and easily accessible source of vitamin A. It can provide a cheap and sustainable form of vitamin A for its deficiency prone communities. Unavailability of suitable maize varieties rich in provitamin A and insufficient nutrition education to the consumers are the major challenges for adoption of provitamin A maize. The introduction, development and commercialization of provitamin A rich maize varieties  in collaboration with national and international scientists, CG centers, multinational companies, I/NGOs, government agencies, and private sectors can help to fight against vitamin A induced malnutrition in Nepal.  DOI: http://dx.doi.org/10.3126/on.v12i1.12256 Our Nature (2014), 12(1): 44-48","PeriodicalId":19905,"journal":{"name":"Our Nature","volume":"92 1","pages":"44-48"},"PeriodicalIF":0.0,"publicationDate":"2015-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78101182","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}