Sinet, Ethiopian Journal of Science最新文献_第3页

A study on testicular characteristics of ram lambs of Arsi breed fed on two maize varieties (QPM and BH540) 饲喂两个玉米品种(QPM和BH540)对Arsi种公羊羔睾丸特性的影响

Sinet, Ethiopian Journal of Science Pub Date : 2011-08-12 DOI: 10.4314/SINET.V32I1.67877

M. Endale, M. Hailemariam, A. Tegegne

引用次数: 3

Human-wildlife conflict in and around the Simien Mountains National Park, Ethiopia 埃塞俄比亚塞米恩山脉国家公园内外的人类与野生动物冲突

Sinet, Ethiopian Journal of Science Pub Date : 2011-08-12 DOI: 10.4314/SINET.V32I1.67785

Mesele Yihune, A. Bekele, Zelealem Tefera

引用次数: 23

Minimal pairs of polytopes and their number of vertices 多边形的最小对及其顶点数

Sinet, Ethiopian Journal of Science Pub Date : 2011-08-12 DOI: 10.4314/SINET.V32I1.68732

Semu Mitiku

引用次数: 1

Landslide hazard zonation around Gilgel Gibe-II Hydroelectric project, Southwestern Ethiopia 埃塞俄比亚西南部Gilgel Gibe-II水电项目周围的滑坡危险区

Sinet, Ethiopian Journal of Science Pub Date : 2011-08-12 DOI: 10.4314/SINET.V32I1.68733

Engdawork Mulatu, T. Raghuvanshi, B. Abebe

{"title":"Landslide hazard zonation around Gilgel Gibe-II Hydroelectric project, Southwestern Ethiopia","authors":"Engdawork Mulatu, T. Raghuvanshi, B. Abebe","doi":"10.4314/SINET.V32I1.68733","DOIUrl":"https://doi.org/10.4314/SINET.V32I1.68733","url":null,"abstract":"The present study was carried out along the newly constructed road from Fofa town to Gilgel Gibe-II powerhouse in South western Ethiopia. In this study, an attempt has been made to provide information on the landslide hazard zones present along the new road. In order to delineate the hazardous zones the landslide hazard evaluation factor rating scheme (LHEF) proposed by Anbalagan (1992) has been utilized. The LHEF rating scheme is based on an empirical approach which combines past experience gained from the study of causative factors and their impact on landslides with conditions anticipated in the area of study. For LHEF rating scheme data on major inherent causative factors of slope instability such as geology, slope morphometry, relative relief, land use and land cover and ground water conditions has been collected. Based on the evaluation values, the slopes in the study area have been classified for landslide potential as; High Hazard, Moderate Hazard and Low Hazard. The results of the present study indicate that 54% of the slopes in the study area fall in High Hazard, 34% in the Moderate Hazard and 12% in the Low Hazard zones. Thus, the Landslide Hazard Zonation shows that chances of slope failures are high in the study area.","PeriodicalId":245987,"journal":{"name":"Sinet, Ethiopian Journal of Science","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132353139","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}

引用次数: 7

Reaction of some rumen micro flora to different supplementary feeds in rumen fistulated animals 瘤胃瘘管动物瘤胃微菌群对不同补充饲料的反应

Sinet, Ethiopian Journal of Science Pub Date : 2011-08-12 DOI: 10.4314/SINET.V32I1.68735

Tadessa Daba, F. Assefa, S. Bediye

{"title":"Reaction of some rumen micro flora to different supplementary feeds in rumen fistulated animals","authors":"Tadessa Daba, F. Assefa, S. Bediye","doi":"10.4314/SINET.V32I1.68735","DOIUrl":"https://doi.org/10.4314/SINET.V32I1.68735","url":null,"abstract":"Ruminant animals lack enzymes to break down fibrous feeds but they harbor microorganisms capable of degrading their feeds. Rumen microbes are affected by feed substrates. The purpose of this study was to evaluate rumen microbial changes as the function of varying supplementary feeds. Two protein supplements (cottonseed cake and tree lucerne) and two energy supplements (wheat bran and molasses) were offered to rumen fistulated oxen of two groups varying in age. The supplements vary mainly in protein and fibre contents. Switch over design was used in the experiment and the oxen were switched to another supplement after one week to avoid the carryover effect. Microbial populations, correlations with feed nutrient composition and enzyme assays in each case were studied and JMP 5.1 computer software was used for the analysis. Both the bacterial and fungal populations were the highest in oxen supplemented with cottonseed cake (10.7x1011cfu/ml bacteria & 10.8x105cfu/ml fungi) in both young and older oxen (7.4x1010cfu/ml bacteria and 7x105cfu/ml fungi), respectively. The total microbial populations were higher in younger groups supplemented with similar supplement than the older groups of oxen and the least microbial count was observed in those supplemented with tree lucerne ( Chamaecytisus palmensis ). The enzyme activities were also compared and showed significant variations and linear relation with the nutrient compositions of the feeds. A supplement rich in both fibre and protein supported dynamic rumen microbial population and is very important for the production of quality animal products.","PeriodicalId":245987,"journal":{"name":"Sinet, Ethiopian Journal of Science","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132838512","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}

引用次数: 2

Reproductive biology and condition factor of the catfish Bagrus docmak (Forsskål) (Pisces: Bagridae) in Lake Chamo, Ethiopia 埃塞俄比亚查莫湖Bagrus docmak (forsskamatl)(双鱼座:Bagridae)的生殖生物学和条件因素

Sinet, Ethiopian Journal of Science Pub Date : 2011-08-12 DOI: 10.4314/SINET.V32I1.67765

Hailu Anja, E. Dadebo, S. Mengistou

引用次数: 4

Effect of drought/irrigation on proximate composition and carbohydrate content of two enset [Ensete ventricosum (Welw.) Cheesman] clones 干旱/灌溉对两种叶麻(Ensete osum, Welw.)近似组成和碳水化合物含量的影响Cheesman]克隆

Sinet, Ethiopian Journal of Science Pub Date : 2011-05-27 DOI: 10.4314/SINET.V31I2.66527

S. Zewdie, M. Olsson, M. Fetene

{"title":"Effect of drought/irrigation on proximate composition and carbohydrate content of two enset [Ensete ventricosum (Welw.) Cheesman] clones","authors":"S. Zewdie, M. Olsson, M. Fetene","doi":"10.4314/SINET.V31I2.66527","DOIUrl":"https://doi.org/10.4314/SINET.V31I2.66527","url":null,"abstract":"Enset [ Ensete ventricosum (Welw.) Cheesman] is an important root crop serving as a carbohydrate rich food source in Ethiopia. Perennial crops, like enset, are often exposed to recurrent dry periods which could greatly affect their growth, physiology and yield. The effect of induced drought/irrigation on the proximate composition and carbohydrate content of harvestable plant parts (pseudostem and corm) of two field grown enset clones ( Ameratye and Yesherakinkye ) was investigated. Proximate analysis showed that extended drought significantly (P £0.05) reduced crude protein, ash content, potassium and phosphorus contents of enset pseudostem and corm of the two clones. On the other hand, crude fibber content and calcium levels were significantly higher in droughted groups than irrigated ones. There were no significant treatment effects on crude fat content and /or magnesium levels. Moreover, drought resulted in a significant increase in the level of soluble sugars and a decline in starch content of plant parts in both clones. Droughted plants accumulated 2–4 fold more soluble sugars than irrigated groups while the latter group gained 14–23% more starch. There was no significant difference between the two clones for the parameters considered. Low nutrient content of droughted plants could be the result of reduced nutrient uptake and assimilation caused by low soil water content and limited energy source (carbon skeleton). The observed increase in soluble sugars could be an indication of osmotic adjustment mechanisms in droughted enset plants. On the other hand, the decline in starch content could be due to reduced carbon assimilation and/or starch degradation.","PeriodicalId":245987,"journal":{"name":"Sinet, Ethiopian Journal of Science","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115815790","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}

引用次数: 15

Characteristics and classification of the soils of the plateau of SIMEN Mountains National Park (smnp), Ethiopia 埃塞俄比亚西门山国家公园(smnp)高原土壤特征与分类

Sinet, Ethiopian Journal of Science Pub Date : 2011-05-27 DOI: 10.4314/SINET.V31I2.66544

Mohammed A. Assen, B. Tegene

{"title":"Characteristics and classification of the soils of the plateau of SIMEN Mountains National Park (smnp), Ethiopia","authors":"Mohammed A. Assen, B. Tegene","doi":"10.4314/SINET.V31I2.66544","DOIUrl":"https://doi.org/10.4314/SINET.V31I2.66544","url":null,"abstract":"The Simen Mountains National Park (smnp) is found in the Simen Mountains (North Gonder). Detailed soil survey (scale 1:25 000) was conducted to classify, characterise and determine status of the soils of the plateau of smnp. Umbric Andosols, Luvic Andosols and Mollic-Lithic Leptosols were found to be the major soil types. Land use and topographic attributes affected many of the characteristics of the soils. Thickness of total and topsoil depth decreased with increase in slope gradient and altitude. Whereas the whole of the study area was once covered by dark topsoil, this characteristic was lost in many of the cultivated soils. Under natural conditions, the soils had high levels of andic properties (which fixed P availability) and high contents of surface organic carbon (commonly over 6%), and total nitrogen (>0.4%), available water holding capacity (over 30%) and cec (>30 Cmolc kg -1 soil). Contents of organic carbon, total nitrogen, available phosphorus, water holding capacity, levels of pH and topsoil depth were most sensitive to degradation and lowered in quality under cultivation, suggesting the need having awareness in their management under cultivated soils. Crop and animal production expanded to higher altitudes and steeper slopes (>80%) where the rare wild animals existed, which would cause their displacement and extinction. Therefore, coexistence of farming population and wild animals could not become sustainable in the smnp. This calls for a development of sound land use plan in order to preserve (and conserve) natural resources in general and the soil resources in particular.","PeriodicalId":245987,"journal":{"name":"Sinet, Ethiopian Journal of Science","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114086104","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}

引用次数: 4

Species composition, abundance, distribution and habitat association of rodents of Wondo Genet, Ethiopia 埃塞俄比亚Wondo Genet啮齿动物种类组成、丰度、分布及生境关系

Sinet, Ethiopian Journal of Science Pub Date : 2011-05-27 DOI: 10.4314/SINET.V31I2.66637

D. Kassa, A. Bekele

{"title":"Species composition, abundance, distribution and habitat association of rodents of Wondo Genet, Ethiopia","authors":"D. Kassa, A. Bekele","doi":"10.4314/SINET.V31I2.66637","DOIUrl":"https://doi.org/10.4314/SINET.V31I2.66637","url":null,"abstract":"A study on small mammal community of Wondo Genet was carried out from August, 2005 to March, 2006 encompassing both wet and dry seasons. This was undertaken using both live-trapping and snap-trapping techniques in farmlands, plantations, grasslands, forest and bushes. There were 371 captures of rodents and shrews from live-trapping and 73 captures from snaps. Seven species of rodents ( Stenocephalemys albipes, Lophuromys flavopunctatus, Arvicanthis abyssinicus, Desmomys harringtoni, Mastomys natalensis, Mus mahomet and Rattus rattus ) and two species of shrews ( Crocidura flavescens and C. fumosa ) were recorded. S. albipes and L. flavopunctatus were the most abundant species, whereas M. mahomet, R. rattus, C. flavescens and C. fumosa were rare. Males comprised 55% and females 45% of the total capture. Among the rodents captured, 76.8% were adults, 3.6% sub-adults and 19.6% young. Estimates of population size on the live trapping grids using minimum number alive (MNA) technique varied from 59 in January to 103 in November. Peak density was recorded for S. albipes (226/ha) and lowest for R. rattus (16/ha). Maximum biomass was recorded during November (5,256 g) and minimum during January (2,314 g). Most of the rodents in the present study tended to prefer bushes and scrubs.","PeriodicalId":245987,"journal":{"name":"Sinet, Ethiopian Journal of Science","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121119255","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}

引用次数: 18

MOLECULAR EVIDENCE OF COTESIA FLAVIPES (CAMERON) (HYMENOPTERA: BRACONIDAE) ESTABLISHMENT IN ETHIOPIA 衣索比亚黄茧蜂(膜翅目:小蜂科)分布的分子证据

Sinet, Ethiopian Journal of Science Pub Date : 2011-05-27 DOI: 10.4314/SINET.V31I2.66666

E. Getu

{"title":"MOLECULAR EVIDENCE OF COTESIA FLAVIPES (CAMERON) (HYMENOPTERA: BRACONIDAE) ESTABLISHMENT IN ETHIOPIA","authors":"E. Getu","doi":"10.4314/SINET.V31I2.66666","DOIUrl":"https://doi.org/10.4314/SINET.V31I2.66666","url":null,"abstract":"Cotesia flavipes (Cameron) is an Asian origin endo-larval parasitoid of cereal stemborers in the genera of Chilo, Sesamia and others. It was introduced into Kenya mainly for the control of Chilo partellus (Swinhoe) (Lepidoptera: Crambidae) from India, and North and South Pakistan. After introduction, the parasitoid was released in C. partellus prone areas of Eastern and Southern African countries. The establishment rate varies from country to country and region to region within the country. In Ethiopia, the parasitoid was not released, but for the first time recorded in 1999 as identified morphologically. Morphological traits in many instances lead to wrong taxonomic conclusion. Hence, molecular investigation was carried out to confirm whether the parasitoid recorded in Ethiopia is C. flavipes or not by running Polymerase Chain Reaction (PCR) of DNA fragments of C. flavipes collected from Ethiopia and other African and Asian countries. The PCR analysis using 16S gene (primer) indicated that C. flavipes collected from Ethiopia had similar bands with C. flavipes from other countries confirming the correctness of the morphological traits used to identify the parasitoid. Hence, the parasitoid recorded in 1999 in Ethiopia was Cotesia flavipes which was established without release. To partition the differences that could exist among the different populations of C. flavipes and possibly trace the origin of Ethiopian population, advanced molecular techniques such as restricted fragment polymorphism (RFLP) and sequencing will be recommended although the exercises are expensive.","PeriodicalId":245987,"journal":{"name":"Sinet, Ethiopian Journal of Science","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130033732","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}

引用次数: 2