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1.
Lazel.  J 《动物分类学报》2000,25(3):304-311
描述了Mastigoproctus的一个新种,Mast8igporoctus transoceanicius sp.nov.。新种是Mastigoproctus在亚洲的首次记录,与其美国佛罗里达州的M.giganteus近似,但新种个体较小,胫节和跗节较为退化,以至触肢收缩时,3个指尖相互靠近和接触。新种的重婚2腹板亦较为简单。文中还讨论了Uropygida目跨越白令海峡分布在生物地理学的意义。  相似文献   

2.
中国东北晚侏罗世蝎蛉化石研究   总被引:4,自引:2,他引:2  
本文描述蝎蛉化石1新属4新种。新属Megabittacus2新各,即Megabitacus colosseus sp,nov。,Megabittacus beipiaoensis sp,nov,新种Sibirobittacus atalus sp,nov,属于现生的蚊蝎蛉科,新种Orthophlebia liaoningensissp,nov,属于绝灭的直脉蝎蛉科。化石采于辽宁省北票我侏罗世义县级  相似文献   

3.
河南省伏牛山蝎蛉记述:长翅目:蝎蛉科   总被引:4,自引:4,他引:0  
本文报道了1996年7月河南省伏牛山昆虫考察中采到的蝎蛉科6种昆虫,其中蝎蛉属Pamor pa4种,即大蝎蛉Panor pa magna Chou,六刺蝎蛉P.sexspina Cheng,华山蝎蛉P.emarginata Cheng和伏牛山蝎蛉P.funiushana Hua et Chou,sp.n。新蝎蛉属Neo panor pa2种,即河南新蝎蛉Neopanor pa longiproce  相似文献   

4.
唐兆和 《四川动物》2002,21(1):44-44
短尾贼鸥在我国见于台湾省沿海地区。国外分布于北极、南非、印度、澳大利亚等地沿海。2001年4月15日,笔者在福建省长乐市国际机场草地上获得一只雌性短尾贼鸥(Stercorarius parasitius),系大陆首次发现,标本保存于福建师大生物工程学院动物标本室,其衡量度(单位:g,mm):体重320,全长434,嘴峰(含蜡膜)30,翼长330,尾长210,跗跖42。形态:头顶至枕部、眼先和颏黑褐色;后颈羽毛延长形成窄部,黑褐色缀有淡黄色;耳羽、颈部白色渲染淡黄;喉、胸及腹白色,前胸两侧和胁灰…  相似文献   

5.
蝎蛉属Panorpa东北一新种(长翅目:蝎蛉科)   总被引:3,自引:1,他引:2  
本文描述产自中国东北辽宁和黑龙江的蝎蛉1新种-刘氏蝎蛉Panorpa liui,sp.nov.。模式标本保存在西北农业大学昆虫博物馆。  相似文献   

6.
描述了Mastigoproctus的一个新种 ,Mastigoproctustransoceaniciussp nov 。新种是Mastigoproctus在亚洲的首次记录 ,与其美国佛罗里达州的M giganteus近似 ,但新种个体较小 ,胫节和跗节较为退化 ,以至触肢收缩时 ,3个指尖相互靠近和接触。新种的生殖腹板亦较为简单。文中还讨论了Uropygida目跨越白令海峡分布在生物地理学上的意义  相似文献   

7.
黑龙江绥滨地区中侏罗世晚期绥滨组沟鞭藻类的发现   总被引:7,自引:1,他引:6  
本文对首次发现在黑龙江东部西三江地区绥滨51孔绥滨组中部的海相沟鞭藻类进行了初步研究,描述化石13属17种,其中含3新种Pareodiniasuibinensissp.nov.,Diconodiniumelipticumsp.nov.,Leptodiniumsonghuajiangensesp.nov.;认为以Pareodiniaceratophora,Nannoceratopsispelucida,Chytroeisphaeridiascabrata等优势种为代表的沟鞭藻组合的地质时代应为Calovian期,很可能为Calovian中晚期。  相似文献   

8.
棘腹蛙血液内利川锥虫生活史的研究   总被引:1,自引:1,他引:0  
利川锥虫(TrypanosomalichuanensisLi)寄生在棘腹蛙血液内。虫体波动膜明显。鞭毛较粗,一般不伸出体外形成游离的鞭毛。感染试验表明其中间宿主是绿蛙蛭(BatracobdellapaludosaCarena)。虫体在绿蛙蛭嗉囊的上皮细胞内进行裂配生殖或假包囊,产生许多无鞭体、前鞭体和锥虫体等不同发育时期。前鞭体的超微结构特点是:虫体表膜较厚,表膜下微管管壁较厚,线粒体较多,卵圆或长椭圆形,隆嵴不明显。未见高尔基体,内质网很少,不易观察到。胞质中有3—5颗或更多、多角形至圆形,较大的色素体。  相似文献   

9.
描述黑龙江省东部西盆地典型的城子河组下部海相层(包括南部带海相层,即原“石河北组”)的沟鞭藻类化石15属19种,含1新种和1新组合种。它们可分出两个沟鞭藻组合:Odontochitina operculata-Muderon-gia teltracantha组合(下部)和Vespeopsis zhaodongensis组合(上部);讨论沟鞭藻组合的特征及其地质时代,并与国际上有关地层进行对比,认为  相似文献   

10.
本文记述采自我国吉林省长白山区的鞭蛛属一新种,即腹斑鞭突蛛Trichoncus maculatus sp.nov.本文测量单位为mm,模式标本均保存在白求恩医科大学生物教研室。  相似文献   

11.
植硅体的现代过程研究是利用植硅体这一指标精准恢复区域古植被、古气候的前提和关键环节,探讨表土植硅体组合的空间分布特征及其对环境因子的响应尤为重要。本研究在东北地区沿着年降水量为600 mm等降水线采集54块表土样品,研究单一温度控制下表土植硅体的空间分布规律,以期寻找对温度比较敏感的植硅体类型。结果表明: 54块表土样品中植硅体类型相同,共鉴定出15类,分别是棒型、尖型、块状、扇型、扁平状、帽型、鞍型、哑铃型、齿型、三棱柱型、硅化气孔、导管型、硅质突起、弓型、椎骨状,且主要以棒型、尖型为主,短细胞、块状、扁平状次之,其他类型植硅体的平均百分含量不足1.0%。小兴安岭、松辽平原和辽西低山丘陵3个区域的表土植硅体组合特征存在差异,判别分析结果能够将3个区域样点有效区分开,总的判别正确率为94.4%,其中棒型、尖型、三棱柱型的平均含量在小兴安岭最大,在辽西低山丘陵最小;而鞍型、哑铃型、硅质突起与之相反;块状、扁平状、扇型则主要是在松辽平原最大,且棒型、尖型、三棱柱型、鞍型、哑铃型、硅质突起、块状、扁平状和扇型的百分含量在3个区域之间存在显著差异。棒型、尖型、三棱柱型的百分含量与年均温之间存在显著负相关,块状、扁平状、扇型、哑铃型、硅质突起的百分含量与年均温呈显著正相关,而鞍型、帽型、齿型的百分含量与年均温没有显著相关性。  相似文献   

12.
This study had the purpose to compare with development of fitness, motor ability and health among various living environments of the sea-side, the urban, and the mountain districts, where were situated at Nadachi town on the suburbs of Niigata Prefecture. Five hundred thirty-five children (aged 4-15 yrs) were measured at the kindergarten, the fundamental school, and the junior high school. Measuring items of the physique were the height, the weight, the chest circumference, the sitting height, and the foot area. Physical fitness tests were the muscular grip-strength, the lung vital capacity, the closed-eye single-leg balance, the dipping time of the upper extremity, the vertical jump, the standing trunk flexibility, the endurance run, and pull-up. And, motor ability tests were the finger tapping, 5m shuttle run, 50m dash, and the ball throwing. As items of health inspection, the blood pressure (systolic and diasystolic) and the visual ability were adopted. As results of this study, following data were obtained; 1) At the sea-side environment, development of the muscle power, the respiratory function, and the physique were showed much faster rate of growth at the childhood than that of the other ones, significantly (P less than 0.01). 2) At the mountain environment, the arch-bend of the foot print only were appeared larger areas than that of the other ones, significantly (P less than 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

13.
 在长白山针阔叶混交林下,红松、蒙古栎、春榆、白桦、山杨、色木及紫椴叶分解至300天时,其重量损失百分数分别为24.2,37.6,30.8,44.47,50.6及55.6。在分解过程中,每种叶子的重量损失同该叶子的木质素、水溶性物质、全碳及全氮的变化成线性相关(R=0.99**)。在叶子分解前期,木质素、N素的绝对量有所增加,而水溶性物质则急剧减少。除紫椴叶外,其它几种叶子在分解过程中氮的含量有一定增加。但是,当红松、蒙古栎、春榆、白桦、山杨及色木叶中N素浓度分别为0.96%,1.41%,2.38%,1.67%,1.32%及1.32%时,则开始了N素的矿化释放。  相似文献   

14.
An integrated medical genetic an population genetic study has been performed in two raions (administrative districts) of the Tver oblast (region) of Russia: the Udomlya raion located in the zone affected by the Kalininskaya Nuclear Power Plant and the Ostashkov raion, which served as a control district. No significant differences has been found with respect to the genetic parameters studied. The values of these parameters in the populations of the town of Udomlya, the town of Ostashkov, the Udomlya raion, and the Ostashkov raion, respectively, are the following: random inbreeding, 0.00006, 0.00011, 0.000167, and 0.000366; endogamy index, 0.05, 0.43, 0.30, and 0.42; local inbreeding, 0.0003, 0.00045, 0.0009, and 0.0011; the degree of isolation by distance, 0.0003, 0.00045, 0.0009, and 0.0005; sigma, 2098, 1338, 1473, and 1189; the load of autosomal dominant (AD) diseases, 0.71, 0.92, 0.92, and 1.37; the load of autosomal recessive (AR) diseases, 0.68, 0.69, 0.67, and 0.82; and the load of X-linked diseases, 0.18, 0.64, 0.83, and 0.27.  相似文献   

15.
该指标系统规定了空气生境指数(Air entironment index,简称AEI)、生境空气质量分级、采样点及取值时间,采样与分析方法及数据统计的有效性规定。空气生境指数(AEI)的测定与评价的十个项目:空气洁净度(CI)、空气新鲜度(T)、植物精气浓度、人均绿地面积、绿地植物覆盖率、硬质覆盖率、水体覆盖率、界外植物覆盖率、移植植物树龄或原生植物树龄、植物种类和植物景观。本手册适用于住区生境空气质量评价。住区生境空气质量分为五级:5A级空气质量住区;4A级空气质量住区;3A级空气质量住区;2A级空气质量住区;1A级空气质量住区。  相似文献   

16.
洞庭湖流域中上游地区景观格局变化的水文响应   总被引:3,自引:0,他引:3  
刘明  王克林 《生态学报》2008,28(12):5970-5979
将洞庭湖流域中上游地区1980、1995和2000年的Landsat MSS和TM卫星照片解译所得的景观数据,与经过最大似然估计法“消噪”的湘、资、沅、澧四水入湖水文站的年内最高洪峰水位、最大瞬时流量、年入湖径流量和年入湖泥沙量数据进行Paneldata模型处理,并对处理后的景观和水文数据进行灰色分析和主成分分析。结果表明:研究区最高洪峰水位的变化受景观格局变化影响最大,入湖泥沙量的变化受景观格局变化影响最小。对最高洪峰水位变化影响最大的是山地水田、水库坑塘和灌木林地疏林地景观面积的变化,影响指数值分别达-48.5、-48.1和45.2;对最大瞬时流量变化影响最大的是水库坑塘、水田(山地水田除外)和灌木林地疏林地景观面积的变化,影响指数值分别达-41.9、41.2和41.2。有林地景观因林分差和林种结构单一,对各水文特征指标变化的影响较小,影响指数值分别仅为-10.1、-13.5和-14.5。  相似文献   

17.
Plant, soil, and sediment samples were taken from the Fuqiao area within the Huayuan River basin in South China. Concentrations of manganese, zinc, cadmium, and lead in the samples were measured, and the characteristics of the plant samples to absorb, transfer, and accumulate the target metals were analyzed. It was indicated that the concentrations of target metals in 13 plant samples greatly exceeded the background values of target metals in plants over the world, and that the plant species might evolve to the accumulating ecotypes for the target metals under the long-term stress from the contaminated environment. Among 13 plant species, Alternanthera philoxeroides exhibited the highest accumulation capacities for the target metals, amounting to 6511, 13,784, 155, and 104 mg/kg in its shoots for manganese, zinc, cadmium, and lead, respectively. Its bioaccumulation coefficients for manganese, zinc, cadmium, and lead were 5.08, 49.23, 36.78, and 34.81, respectively, and its transfer factors for manganese, zinc, cadmium, and lead were 7.53, 3.19, 7.38, and 1.29, respectively. The results showed that Alternanthera philoxeroides satisfied the criteria for the hyperaccumulator for zinc and cadmium, and that it might be a potential native plant species for phytoremediation of the contaminated soil, sediment, and river water by the target metals within the basin.  相似文献   

18.
竹类果实胚体的比较解剖与系统分类   总被引:5,自引:1,他引:4  
  相似文献   

19.
By using array comparative genomic hybridization (array CGH), to analyze the aneuploidy of the single blastomeres from non-pronuclear embryos on cleavage-stage in IVF cycle. Four non-pronuclear embryos were got from an IVF cycle, and the each single cell was biopsied from the four cleavage-stage embryos on the third day after the insemination which was investigated by using array CGH. After the biopsy, all the embryos continued to cleave, and lately entered the morula stage on the fifth day, just one embryo 3 was developed to early blastocyst stage on the sixth day. The four blastomere 24 chromosomes showed one X monomer and three normal XY diploids; the autosome chromosomes of blastomeres were abnormally gained or lost at different chromosome from four embryos, such as Embryo 1 : 49,X (?1, ?5, ?11, ?19, ?20, ?21, ?Y, +3, +6, +7, +8, +10, +13, +14, +16, +17, +18); Embryo 2 : 44,XY (?12, ?15); Embryo 3: 47,XY (?3, ?8, ?9, ?21, +7, +17, +18, +19, +20); Embryo 4 : 54,XY (+4, +7, +10, +12, +13, +16, +17, +22). With the use of the array CGH, the aneuploidy analysis could review the abnormal chromosomes of single blastomere from the non-pronuclear embryos, which can harbor the risk of abnormal sex chromosome and autosome chromosomes.  相似文献   

20.
概述了新型冠状病毒肺炎疫情期间辽宁省食用菌产业生产和管理现状,分析了疫情对辽宁省食用菌产业产前、产中、产后的影响,指出了原辅料准备、菌种(棒)生产、养菌管理、产品销售以及人员用工、交通物流等存在的诸多问题,明确了疫情对食用菌产业结构、销售市场结构、投资市场结构主要的影响因素,提出了应对交通不畅、劳动力匮乏、资金短缺、技术缺乏的具体措施,并对辽宁省食用菌产业健康持续高质量发展提出建议。  相似文献   

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