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Based on the two cruises investigation in Acipenser sinensis Natural Reserve and its adjacent waters (31°19.58'N-31°38'N, 121°32.08'N-122°11.65'E) in May and August 2004, the seasonal variations of species composition and quantitative distribution of fish eggs and larvae in the study area were studied, with the relevant environmental affecting factors analyzed. The results showed that in study area, the species composition and quantitative distribution of fish eggs and larvae varied remarkably in different seasons.

根据2004年5月和8月共2个航次对中华鲟保护区及其邻近水域16个定点观测站进行的鱼卵和仔鱼调查资料,对该水域鱼卵仔鱼的种类组成和数量分布的季节变化特征以及有关的环境影响因子作了分析和探讨。

Based on the two cruises investigation in Acipenser sinensis Natural Reserve and its adjacent waters (31°1958′N〖KG-*2〗-〖KG-*7〗31°38′N, 121°3208′N〖KG-*2〗-〖KG-*7〗122°11.65′E) in May and August 2004, the seasonal variations of species composition and quantitative distribution of fish eggs and larvae in the study area were studied, with the relevant environmental affecting factors analyzed.

根据2004年5月和8月共2个航次对中华鲟保护区及其邻近水域16个定点观测站进行的鱼卵和仔鱼调查资料,对该水域鱼卵仔鱼的种类组成和数量分布的季节变化特征以及有关的环境影响因子作了分析和探讨。

Numbers from last year were: 3,261 and 3,182 Black-necked Cranes, 804 and 1,158 Common Cranes Grus grus , 1,759 and 2,978 Bar-headed Geese Anser indicus , and 3,442 and 5,444 Ruddy Shelducks Tadorna ferruginea on 18 and 19 January 2002 respectively.

该次调查(同样是1月18-19)两天的数量分别为:黑颈鹤(3261,3,182),灰鹤(804,1158),斑头雁(1759,2978),赤麻鸭(3442,5444)。

Species in Ciconiiformes, 6 species in Gruiformse, 17 species in Anseriformes, 16 species in Charadriiformes, 1 species in Gaviiformes, 1 species in Podicipedifromse, 1 species in Phalacrocoraciformes, 6 species in Lariformes. The largest number of them came from Anseriformes and Lariformes .

本次调查共记录到56种水鸟,分别属于8目13科,其中鹳形目8种鹤形目6种,雁形目17种,形目16种,潜鸟目1种,鸊鷉目1种,鹈形目1种,鸥形目6种,数量最多的是鸥形目和雁形目的水鸟。

It surveys the status quo of domestic and foreign research projects,document numbers of candidate front;ers in LISA database,the topics of JASIST publications,the review topics of ARIST and topics of annual meetings of ASIST.

分别对国内外情报学研究项目的立项情况、LISA文献数据库中收录的候选领域的文献数量、美国情报科学技术学会会刊载文的主题、美国《情报科学技术年评》的评论主题和美国情报科学技术学会年会的主题进行调查统计。

Based on data collected at four stations in Daning River in the spring of 2004 and 2005, phytoplankton community structure, vertical distribution, abundance, biomass, C contents, diversity index, richness index and evenness index were studied. The causes of eutrophication and water blooms in Daning River were analysed and control measures were then put forward. The dominant species were Asterionella Formosa, Cryptomonas ovata, Cyclotella caspia, Stephanodiscus neoastraea in the spring of 2004 and those were Pandorina morum, Eudorina elegans, Cyclotella caspia, Cryptomonas ovata in the spring of 2005. Average cell densities, biomass, C contents in the spring of 2004 and 2005 were 171.1×10^5 cells/L, 12.2 mg/L, 1732.2g C/L and 113.1×10^5 cells/L, 10.1 mg/L, 1395.9g C/L, respectively.

报道了大宁河2004年春季和2005年春季浮游藻类的种类组成、垂直分布、数量、生物量以及C含量的调查结果,并应用多样性指数、丰富度指数和均匀性指数对其水质进行了综合评价;对大宁河蓄水后出现的富营养化现象和春季发生&水华&的原因进行了探讨,同时提出了控制水体富营养化的建议。2004年春季,藻类优势种为美丽星杆藻、卵形隐藻、里海小环藻和新星形冠盘藻;2005年春季的优势种为实球藻、空球藻、里海小环藻和卵形隐藻。2004年和2005年的细胞密度、生物量和C含量分别平均为171.1×10^5 cells/L,12.2 mg/L,1732.2g C/L和113.1×10^5 cells/L,10.1 mg/L,

Seasonal fluctuation of the population was identical in the different several areas.Annual variation of Mus caroli was relatively stable in four couties.

在数量分布较多的不同调查区内种群季节波动较为一致;年间变动相对稳定。

Marine zoology ; quantiative distribution ; research and analyse ; Chaetognatha ; environmental factor ; Taiwan Strait

海洋动物学;数量分布;调查和分析;毛颚动物;台湾海峡;环境因素

The incidence of Sitodiplosis mosellana has following four factors, which are a new insect in Beijing area, concealable behavior, rapid growth of population and poor understanding of the insect.

通过对小麦吸浆虫发生为害调查、防治试验和灾害控制,明确了该虫在北京市成灾的主要原因有4点,即吸浆虫是外来入侵的新害虫,生活、为害隐蔽,种群数量增长迅速和防治不及时。

Furthermore,biological assessment of water pollution and eutrophic condiction was conducted by using the method of " indicator organism","biotic index"andR.

报道了东平湖轮虫群落结构特征及数量的季节变动,并依据调查结果,采用&指示生物法&、&生物指数法&和R。

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