Sinet, Ethiopian Journal of Science最新文献_第9页

Seasonal home range of Swayne's Hartebeest ( Alcelaphus buselaphus swaynei ) in Senkele Swayne's Hartebeest Sanctuary Senkele Swayne 's Hartebeest Sanctuary中Swayne 's Hartebeest的季节性栖息地(Alcelaphus buselaphus swaynei)

Sinet, Ethiopian Journal of Science Pub Date : 2005-10-18 DOI: 10.4314/SINET.V27I2.18237

Berhanu Gebre, S. Yirga

引用次数: 9

Seasonality and diel activity pattern of Glossina morsitans submorsitans ) (Diptera: Glossinidae) in Ghibe River Valley, Southwest Ethiopia 衣索比亚西南部吉贝河流域黑衣蝗(双翅目:黑衣蝗科)的季节特征和昼夜活动模式

Sinet, Ethiopian Journal of Science Pub Date : 2005-10-18 DOI: 10.4314/SINET.V27I2.18241

Merid Negash, M. Girma, E. Seyoum

{"title":"Seasonality and diel activity pattern of Glossina morsitans submorsitans ) (Diptera: Glossinidae) in Ghibe River Valley, Southwest Ethiopia","authors":"Merid Negash, M. Girma, E. Seyoum","doi":"10.4314/SINET.V27I2.18241","DOIUrl":"https://doi.org/10.4314/SINET.V27I2.18241","url":null,"abstract":"Aspects of the ecology of Glossina morsitans submorsitans inhabiting Ghibe River Valley was studied from October 2000 up to September 2001 with baited monoconical traps. The baits were acetone plus cow urine. Seasonality of the flies were investigated using baited monoconical traps by taking sample every month for five consecutive days for twelve months and diel activity pattern was investigated by taking sample every hour for three consecutive days. The density of G. m. submorsitans was found to be high during wet months and decrease during dry months. It was widely distributed during the rainy season in the savanna woodland; while its distribution was patchy during the dry season. G. m. submorsitans showed a bi-modal daily activity pattern with morning peak followed by mid day depression and then afternoon peak. Its activity rhythm showed a dual relation with temperature, positively correlated in the morning when the temperature is less than 30°C and negatively correlated when temperature is greater than 30°C. Its relation with relative humidity was also both positively and negatively correlated at different time of the day. Key words/phrases : Diel activity, Ghibe River Valley, G. m. submorsitans, seasonality, Southwest Ethiopia SINET: Ethiopian Journal of Science Vol. 27 (2) 2004: 135–142","PeriodicalId":245987,"journal":{"name":"Sinet, Ethiopian Journal of Science","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114776250","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: 1

A comparative study of models for correlated binary data with applications to health services research 相关二元数据模型在卫生服务研究中的应用比较研究

Sinet, Ethiopian Journal of Science Pub Date : 2005-10-18 DOI: 10.4314/SINET.V27I2.18239

G. Dilba, M. Aerts

引用次数: 3

Growth of subharmonic functions of order greater than half 大于1 / 2阶次调和函数的增长

Sinet, Ethiopian Journal of Science Pub Date : 2005-10-18 DOI: 10.4314/SINET.V27I2.18238

S. Mohammed

引用次数: 0

A study on light trap catches of some rice pests in relation to meteorological factors 几种水稻害虫灯诱捕获量与气象因子的关系研究

Sinet, Ethiopian Journal of Science Pub Date : 2005-10-18 DOI: 10.4314/SINET.V27I2.18244

M. Sharma, V. Pandey, Rs Singh, R. Singh

{"title":"A study on light trap catches of some rice pests in relation to meteorological factors","authors":"M. Sharma, V. Pandey, Rs Singh, R. Singh","doi":"10.4314/SINET.V27I2.18244","DOIUrl":"https://doi.org/10.4314/SINET.V27I2.18244","url":null,"abstract":"The effect of meteorological factors on the population build up of green leafhopper Nephotettix virescens Dist (Cicadellidae, Hemiptera), plant hoppers Cofana spectra Dist (Delphacidae, Hemiptera) and C. yasumatsui Young ( Kolla mimica , Hemiptera) and rice gundhi bug Leptocoriza acuta Thunberg (Alydidae, Hemiptera) in rice growing season (July to November) was studied through light trap collection during ten years (1988–1997). Maximum populations of Nephotettix virescens Dist (Cicadellidae, Hemiptera) and C. yasumatsui Young (Kolla mimica, Hemiptera) were recorded in the third week of October during all the years. Cofana spectra Dist had maintained peak activity in respect of population in the last week of September and third week of October. Leptocoriza acuta Thunberg (Alydidae, Hemiptera) had maximum population in second and third weeks of October during the aforesaid period. No meteorological factors have significant effect on the population build up of Nephotettix virescens Dist, Cofana spectra Dist and C. yasumatsui Young in the month of October. In the case of Leptocoriza acuta Thunberg, no other factor but rainfall had positive correlation of order 0.857 with population build up in the fourth week of September. Key words/phrases : Meteorological factors, path analysis, regression analysis, rice insect pests SINET: Ethiopian Journal of Science : Vol. 27 (2) 2004: 165–170","PeriodicalId":245987,"journal":{"name":"Sinet, Ethiopian Journal of Science","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114200362","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: 17

Population dynamics and distribution of the coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae) on Coffea arabica L. in Southwestern Ethiopia 埃塞俄比亚西南部阿拉比卡咖啡果螟虫(鞘翅目:蠹蛾科)种群动态及分布

Sinet, Ethiopian Journal of Science Pub Date : 2005-10-18 DOI: 10.4314/SINET.V27I2.18240

E. Mendesil, B. Jembere, E. Seyoum

引用次数: 20

Isoenzyme analysis of five endemic and one widespread Kniphofia species (Asphodelaceae) of Ethiopia 埃塞俄比亚5个特有种和1个广布种的同工酶分析

Sinet, Ethiopian Journal of Science Pub Date : 2005-10-18 DOI: 10.4314/SINET.V27I2.18242

Tilahun Teklehaymanot, E. Bekele, S. Demissew, I. Nordal

{"title":"Isoenzyme analysis of five endemic and one widespread Kniphofia species (Asphodelaceae) of Ethiopia","authors":"Tilahun Teklehaymanot, E. Bekele, S. Demissew, I. Nordal","doi":"10.4314/SINET.V27I2.18242","DOIUrl":"https://doi.org/10.4314/SINET.V27I2.18242","url":null,"abstract":"There are seven species of genus Kniphofia in Ethiopian flora. K. foliosa, K. hildebrandtii, K. insignis, K. isoetifolia , and K. schimperi are endemic. Kniphofia pumila and K. thomsonii are widespread from West Africa to Eastern and Central Africa. In this study the genetic diversity and the relationships between five endemic and one widespread Kniphofia species in Ethiopia was conducted based on isoenzymes systems. The electrophoretic analyses of four enzymes systems in the species from ten experimental sites in ten locations revealed seven putative loci, of which PGM-1, PGM-2, AAT-2 and GPI-2 were polymorphic. The species have displayed higher genetic diversity parameters than other endemic plants. The over all mean inbreeding coefficient (F) was positive indicating slight deficiency in the number of heterozygotes. The total genetic diversity varies from 0.5 in K. schimperi to 1.11 in K. isoetifolia indicating very low diversification between the populations with in a species. At the generic level HT ranges from 0.034 to 0.470 with a mean of 0.247. The genetic variation among the species (G ST ) is 6.6%. Over all mean of genetic distance (0.011) and genetic similarity (0.938) indicated high similarity among the populations. Despite morphological variation particularly in floral morphology and inflorescence architecture, the over all mean of unbiased genetic identity of the species (0.989) is much higher than described for congeneric species (I = 0.64). The results, therefore, indicate that the Ethiopian Kniphofia species share a fairly recent common ancestor, but have differentiated in floral and inflorescence character through rapid evolution. This hypothesis needs, however, further testing. Key words/phrases : Endemism, genetic diversity, isoenzyme, kniphofia, inbreeding coefficient SINET: Ethiopian Journal of Science Vol. 27 (2) 2004:143–152","PeriodicalId":245987,"journal":{"name":"Sinet, Ethiopian Journal of Science","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116084238","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: 0

Growth performance and survival of local and white leghorn chicken under intensive management system 集约化管理下地方和白来角鸡的生长性能和成活率

Sinet, Ethiopian Journal of Science Pub Date : 2005-10-18 DOI: 10.4314/SINET.V27I2.18243

S. Demeke

引用次数: 16

Analysis of genetic diversity in linseed using AFLP markers 利用AFLP标记分析亚麻籽遗传多样性

Sinet, Ethiopian Journal of Science Pub Date : 2005-10-14 DOI: 10.4314/SINET.V28I1.18230

A. Wakjira, C. Viljoen, M. Labuschagne

引用次数: 7

Metabolism of [ 14 C]GA 19 and [ 14 C]GA 53 by ecotypes of Betula pendula : the role of photoperiod [14c] ga19和[14c] ga53在钟桦生态型中的代谢:光周期的作用

Sinet, Ethiopian Journal of Science Pub Date : 2005-10-14 DOI: 10.4314/SINET.V28I1.18229

Berhanu Abraha Tsegay, J. Olsen, O. Junttila

{"title":"Metabolism of [ 14 C]GA 19 and [ 14 C]GA 53 by ecotypes of Betula pendula : the role of photoperiod","authors":"Berhanu Abraha Tsegay, J. Olsen, O. Junttila","doi":"10.4314/SINET.V28I1.18229","DOIUrl":"https://doi.org/10.4314/SINET.V28I1.18229","url":null,"abstract":"In many temperate woody species, short days (SDs) induced growth cessation has been shown to be prevented by the application of gibberellins (GAs). Evidence has also been forwarded for the influence of photoperiod on the metabolism of applied GAs. Continuing with this line of research, we studied the metabolism of 14C-labelled GA 19 and GA 53 . [ 14 C]GA 19 and [ 14 C] A 53 were applied to the apices of the northern ecotype (67o N) and to the leaves of the southern ecotype (64o N) of Betula pendula Roth. under different photoperiods and at different times in order to compare metabolism during day and night periods. Assay of metabolites was made 10 h after application. Less than half of each applied GA was taken in by the plants and most of the activity was recovered from the application points. There was no clear effect of photoperiod on uptake of the GAs. After the HPLC analysis, most of the absorbed radiolabelled GAs were eluted as unmetabolised forms. However, significant levels of gibberellins A 20 , A 29 , A 1 , and A 8 were recovered as metabolites of [ 14 C]GA 19 both in apical stems and leaves. In 1SD and 4SD-treated plants, there was less metabolism of [ 14 C]GA 19 compared to LD-treated plants. The difference was due to reduced metabolism of 14 C]GA 19 by SD-treated plants during the night period. On the other hand, metabolism of [ 14 C]GA53 was very limited in all day-length treatments and during both, day and night periods. The most abundant metabolite was [ 14 C]GA 19 (10% of the activity in the samples). Key words/phrases : Conjugation, ecotype, gibberellins, metabolism, radioactivity SINET: Ethiopian Journal of Science Vol. 28 (1) 2005: 33–40","PeriodicalId":245987,"journal":{"name":"Sinet, Ethiopian Journal of Science","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131984270","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: 0