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1.
记述了采自台湾海峡南部和厦门港软水母亚纲(Leptomedusae Haeckel,1866)柄杯螅水母科(Hebellidae Fraser,1912)一新种——有丝十盘水母(Staurodiscus cirrussp.nov.)和玛拉水母科(Malagazziidae Bouillon,1984)一新种——中华八拟杯水母(Octophialuciumsinensis sp.nov.),对其特征进行描述,模式标本保存在厦门大学海洋与环境学院.  相似文献   

2.
在浙江兰溪采得淡水水母标本,标本伞径15~20 mm,主触手4条显著长于其他触手;生殖腺囊状,淡绿色;平衡囊135~144个,管状;刺丝囊长椭圆形,刺丝囊疣不规则排列,鉴定为宜昌桃花水母Craspedacustakawaii,为浙江省分布的新记录.  相似文献   

3.
记录了中国海域的十字水母、立方水母、冠水母、旗口水母和根口水母35种,隶属于是16科23属,其中东海及南海的种类多于黄渤海.  相似文献   

4.
根据2007年5月在台湾海峡(20.849°~27.056°N,114.920°~121.241°E)水域采集的标本分析结果,发现了软水母亚纲二新种,即粗手十盘水母,新种(Staurodiscus crassonema sp.nov.)和宽球十盘水母,新种(Staurodiscus latibulbussp.nov.).现将新种形态特征描述如下,为今后编写水螅水母动物志及海洋调查提供参考.  相似文献   

5.
根据5艘(定置张网、帆张网各2艘、拖网1艘)资源监测船从2003-2006年在浙江海域对水母调查监测资料进行分析研究。将收集到本海域常见的水母种类标本(样品)进行鉴定,初步鉴定出水母隶属5个目、9个科,共12种,对每一种类作了描述。并阐述了大型水母对浙江省渔业生产的影响。  相似文献   

6.
厦门港常见管水母,钵水母的刺胞   总被引:1,自引:0,他引:1  
鉴定、描述了厦门港2种管水母和4种钵水母的刺胞。其中,灯水母的基刺等丝刺胞,霞水母的中刺等丝刺胞是钵水母刺胞的新记录。文中还比较了各类管水母的刺胞,并建议对钵水母的刺胞采用与其它腔肠动物一样的分类原则和术语。  相似文献   

7.
利用显微镜观察桃花水母结构,针对桃花水母的触手、平衡囊、平衡石、生殖腺和食性,拍摄大量图片和视频;制作浸泡标本;针对校园两个不同池塘(水母发生池)和(星海池)作为实验组和对照组,从周围环境、水体(颜色、可见度、光照、水温、PH值、溶解氧、浮游生物)等方面进行调查、实验和对照比较分析,探索桃花水母最适合的生存环境条件。研究中,我们拍摄了大量桃花水母的图片和视频,弥补了目前相关资料的不足,对人们认识、了解、研究这种珍稀物种提供一定参考价值。发现了华英学校水母池桃花水母的生物特征、喜欢富营养化环境,发现我校桃花水母体内含有一特殊浮游生物—车轮虫,国内未曾报道。针对桃花水母分类和保护提出自己看法。  相似文献   

8.
报道福建沿海兰卡水母亚纲-新属新种金德祥水母Jindexiangus statocystus,花水母亚纲-新属新种拟介螅水母Parahydractinia sanshaensis和12个新种:网状高手水母Bougainvillia reticulata、东山介螅水母Hydractinia dongshaensis、多手介螅水母H.polytentaculata、泡状介螅水母H.vacuolata、基球深眼水母Bythocellata bulbiform is、挺隔膜水母Leuckartiarazhangraotingae、大胃拟棍螅水母Hydrocoryne macrogastra、鼓浪枝萨水母C ladosarsia gulangensis、福建真囊水母Euphysorafujianensis、泡状笔螅水母Pennaria blistera、无手外肋水母Ectopleura atentaculala和顶室斜球水母Hybocodon apiciloculata等;此外,有4种水母是我国首次记录:八柱稜水母Lizzia octostyla(Haeckee,1879)、囊海洋水母O ceania armataKolliker,1810、帕尔摩勒水母M oerisia pallasi(Derzhavin,1912)和长手萨氏水母Sarsia japonica(Nagao,1962)等;对新属、新种、新记录种类的形态特征均进行详细描述,为今后的海洋调查及编写水螅水母动物志提供参考.  相似文献   

9.
我国淡水水母一新种   总被引:1,自引:0,他引:1  
1993年4月2日在湖北省秭归县归州镇采用淡水水母标本19个,形态结构与Craspedacusta sinensis相似,但刺丝囊疣低圆锥状,排列不规则;生殖腺囊状,大,褶皱,绿色。这些特征与C.sinensis有着明显区别。  相似文献   

10.
台湾海峡单肢水母属二新种(丝螅水母目,高手水母科)   总被引:2,自引:0,他引:2  
记述了采自台湾海峡的花水母亚纲(Anthomedusae Haeckel,1879),丝螅水母目(Filifera Kühn,1913),高手水母科(Bougainvillidae Lütken,1850),单肢水母属(Nubiella Bouillon,1980)二新种,即粗管单肢水母,新种(N.crassocanalis sp.nov.)和母芽单肢水母,新种(N.medusifera sp,nov.).其鉴别特征如下:1)粗管单肢水母,新种,伞钟形,无顶突,外伞上有分散的刺细胞;垂管短,无胃柄和口管;4个大的生殖腺,间辐位;口简单环状,从口缘上部伸出8条不分枝的口触手;4条辐管粗,边缘不规则;4个缘触手基部近梨形,每个基球背轴有1个内胚层棕红色致密块,并向辐管有1短的突起,4条具有环状刺胞的单生触手;外伞主辐位伞缘有4个囊状刺胞囊,有短管和触手基球连接;2)母芽单肢水母,新种,伞钟形,无顶突;无胃柄,垂管发达;生殖腺环绕在垂管上,在垂管上方有许多水母芽;口管宽大,口环状,在口缘上方有10条不分枝的口触手;4条较细辐管;4条主辐位缘触手,触手基球长锥形,4个外伞刺胞囊,直接和触手基球相连.  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.  相似文献   

14.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

15.
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.  相似文献   

16.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

17.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

18.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

19.
In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.  相似文献   

20.
1 Rise of studies on climate change's effects on biodiversity
Until the 1980s, climate change and biodiversity were studied as two independent disciplines for more than a century. In 1992, the Ecological Society of America's annual report named climate change, biodiversity, and the sustainable ecological system as the three major global environmental issues of the twenty-first century [1].  相似文献   

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