共查询到20条相似文献，搜索用时 234 毫秒
1.
在整理鉴定蔓足类(Cirripedia)小藤壶科(Chthamalidae)标本中,发现四板小藤壶属(Tetrachthamalus)的一新种,描述如下: 中国四板小藤壶(新种)Tetrachthamalus sinensis sp.nov.(图版Ⅰ) 正模式标本 C81073-1,峰吻径4.7mm,侧径4.4mm,高1.6mm,采自广东省海南岛新盈,附着于潮间带栖息的蛉笠藤壶Tetraflita squamosa squamosa壳上。1957.7.25,采集者:王永良。 副模式标本 C81073-2,峰吻径6.2mm,侧径5.5mm,高2.0mm;C81073-3,峰吻径6.0mm,侧径4.8mm,高2.1mm;C81073-4,峰吻径5.3mm,侧径5.0mm,高1.8mm;C81073-5,峰吻径5.8mm,侧径4.9mm,高1.5mm。采集地、时间和采集者同正模式标本。 相似文献
2.
在整理鉴定采自我国近海有柄蔓足类(茗荷亚目Suborder Lepadomorpha)标本中,共发现47种,其中有5新种,本文为新种的描述。模式标本保存在中国科学院海洋研究所。 1.中华直铠茗荷(新种)Litoscalpellum sinense sp.nov.(图1:1—12) 正模标本 V569B-60,头部长11.0mm,宽5.7mm;柄部长7.0mm,宽3.6mm,附着于水螅体上。1978年6月10日采自东海26°15′N,125°00′E,水深为550米,底质为软泥。采集者:唐质灿。头部呈长方形、顶端尖,壳板白色14片,被透明薄膜覆盖,有细短毛,板间有窄的间 相似文献
3.
东海鱼类的复殖吸虫 Ⅴ.寄生于石首鱼类体内的两种新吸虫 总被引：1，自引：0，他引：1
作者整理1982年在东海海域采集的标本时,发现两种寄生于石首鱼类体内的吸虫,经鉴定为新种,它们分隶于棘体科 Acanthocolpidae Luhe,1909和半尾科 Hemiuridae (Looss,1899)Luhe,1901。本文为新种的描述。虫体各部分测量单位为mm,卵子为μm。模式标本保存在中国科学院海洋研究所。 相似文献
4.
在1979年7月—1981年11月间,在长江口采集到24尾体长为32—214mm的东方鲀属鱼类标本,经形态特征和解剖比较研究后,认为是一新种,定名为晕环东方纯Takifugu coronoidus Ni et Li nov. sp.。正副模式标本存放于中国水产科学研究院东海水产研究所和中科院海洋研究所。 相似文献
5.
在整理我国首次南极洲及南大洋考察的多毛类环节动物标本中,我们发现了欧努菲虫科 Onuphidae 两个新种。模式标本采自南大洋站号23。正模标本保存在国家海洋局第一海洋研究所,副模标本保存于国家海洋局第二海洋研究所。新种记述如下。(一)南极金菲虫 Kinbergonuphis antarctica,新种(图版Ⅰ)正模标本号 SOA-SO004,副模标本号 SOA-SO005,水深450m,底质砂质泥。所有标本的体后部均断落。前55个体节长为32mm,宽1.8mm(不包括头部)。头部无眼。触角似球状,头触手5个,其外侧头触手向体后伸可达第2刚节;内侧触手较长,可达第10刚节。中触手比外侧触手稍长,向后伸可达第3刚节,所有头触手基节都 相似文献
6.
1979，1980年春季，作者在采自宁波的两种鳗类体上找到两种孔肠科(Opecoelidae Ozaki, 1925)吸虫，经鉴定为两新种，描述于后。
文内测量单位一律为mm，卵子为μm。模式标本保存在中国科学院海洋研究所。 相似文献
7.
作者采自东海的鱼类吸虫标本，经整理鉴定有8种，分隶于后唇科OpistholebetidaeFukui，1929、鳞肉科Lepocreadiidae (Odhner, 1905) Nicoll, 1935和隐殖科Cryptogonimidae (Ward, 1917) Ciurea, 1933，其中5种系新种，3种为我国新记录，分别记述于后。
虫体器官量度均为mm，卵子为μm，虫体各部位与器官测量值见表1。模式标本保存在中国科学院海洋研究所。 相似文献
8.
胶州湾鱼类复殖吸虫的研究 总被引：1，自引：0，他引：1
胶州湾水域的鱼类复殖吸虫，早在30年代秦素美(1933)曾报道过7种；作者自1958年起陆续在该水域进行吸虫标本采集，先后剖检鱼类49种，共529尾，找到吸虫21种，其中4种为新种。本文为新种记述，并附胶州湾吸虫及宿主鱼类名录。
文内测量单位一律为mm，卵子为μm。模式标本存放在中国科学院海洋研究所。 相似文献
9.
大西洋鲑在封闭循环水养殖模式下的生长和性腺发育研究 总被引：1，自引：0，他引：1
本研究探讨了在封闭循环水养殖模式下大西洋鲑(Salmosalar)的生长发育模式,对封闭循环水系统养殖的大西洋鲑重要生长数量性状进行生物学测量,并跟踪性腺发育状况。本研究自2012年1月通过封闭循环水系统进行大西洋鲑养殖,经过周年养殖,体质量平均达到1194.42g,体长平均达到417.00 mm,体高平均达到100.58 mm,体宽平均达到53.52 mm,少数个体在养殖10个月后性腺发育较快,性腺质量达到9.76 g,性腺指数达到1.31%。本研究的研究结果为建立大西洋鲑标准化循环水养殖系统积累资料。 相似文献
10.
1990年作者《海南岛海鱼寄生复殖吸虫》一书正式出版,同年秋季(10-11月)及1992年春季(3-4月),作者又先后两次赴海南岛进行海鱼吸虫采集,取得标本经整理鉴定共有26种系原书中未曾记载者,其中有4种为新种。现将新种描述于后,并附新记录名录。文中测量单位均为mm,卵子为μm。模式标本保存在中国科学院海洋研究所。 相似文献
11.
The 2004 enlargement of the European Union (EU), as well as the further enlargements planned from 2007 onwards (Romania, Bulgaria, Croatia and Turkey), entail changes of a geo-political nature that not only imply an increase in size (a rise in the number of States, new boundaries), but, more especially, also involve a shift in the EU's maritime status, with its projection towards the Atlantic now being checked by a swing towards continental Europe and its inland seas. In view of the new political map being drawn up, two questions beg to be asked: to what extent is Europe's maritime condition being strengthened; and, does the new maritime Europe constitute an opportunity, or does it aggravate the already-existing problems and threats? 相似文献
12.
Rachel Tiller 《Ocean & Coastal Management》2011,54(5):374-380
The Svalbard Fisheries Protection Zone is an international institution on the brink of being challenged in a critical phase of being institutionalized as a Norwegian property regime. The potential disturbance comes from the zooplankton redfeed, a new and valuable resource harvestable within the zone. Though the pressures on Norway’s inspection routines in the zone are challenged at times, this article suggests that the zone as a management regime is a surprisingly robust institution still. Nevertheless, in such a critical phase it is important not to allow possible exogenous shocks to appear, and creating a separate redfeed regime for the plankton will allow the Norwegian government to bypass this possible disturbance and allow for continued solidification of the zone into an EEZ for Norway. 相似文献
13.
14.
结合工程实例,介绍了座床式圆筒码头基床整平所采用的"下直钢轨与刮道结合进行园环形基床整平"方案及其实施步骤,实验结果表明,该技术方案具有整平面积小、效率高、成本低等优点,为圆筒机床水下施工提供了重要科学依据。 相似文献
15.
We analyzed seafloor morphology and geophysical anomalies of the Southeast Indian Ridge(SEIR) to reveal the remarkable changes in magma supply along this intermediate fast-spreading ridge. We found systematic differences of the Australian-Antarctic Discordance(AAD) from adjacent ridge segments with the residual mantle Bouguer gravity anomaly(RMBA) being more positive, seafloor being deeper, morphology being more chaotic, M factors being smaller at the AAD. These systematic anomalies, as well as the observed Na_(8.0) being greater and Fe_(8.0) being smaller at AAD, suggest relatively starved magma supply and relatively thin crust within the AAD.Comparing to the adjacent ridges segments, the calculated average map-view M factors are relatively small for the AAD, where several Oceanic Core Complexes(OCCs) develop. Close to 30 OCCs were found to be distributed asymmetrically along the SEIR with 60% of OCCs at the northern flank. The OCCs are concentrated mainly in Segments B3 and B4 within the AAD at ～124°–126°E, as well as at the eastern end of Zone C at ～115°E. The relatively small map-view M factors within the AAD indicate stronger tectonism than the adjacent SEIR segments.The interaction between the westward migrating Pacific mantle and the relatively cold mantle beneath the AAD may have caused a reduction in magma supply, leading to the development of abundant OCCs. 相似文献
16.
上海市湿地损失补偿机制博弈分析 总被引：1，自引：0，他引：1
我国河口湿地保护与开发之间的矛盾非常突出,针对长江口地区人地矛盾,采用博弈论的方法探讨长江口湿地补偿问题,并以上海市南汇边滩为例,基于多层博弈模型,从湿地补偿资金的来源、运作方式、投向及产生的生态补偿效益进行一个全过程研究。在第一层博弈分析中提出上海市通过圈围滩涂湿地解决人地矛盾,只有通过降低造地成本才能不违反国家相关政策,风险最小。第二层博弈的结果是基层湿地管理单位力图节约造地成本,并获得来自上海市政府的激励性补偿。第三层博弈带来上海市和基层单位在利益上的双赢,但是却损害了湿地的环境功能。为了弥补环境损失,第四层博弈把南汇边滩造地收益中降低的成本用于补偿其它具有湿地功能的湿地,表面上是补偿湿地面积,实质是补偿生态系统的平稳过渡。通过连续分层博弈过程给予了一个处理河口湿地补偿问题的可选方案。 相似文献
17.
18.
The transformation of depositional lime mud to microporous micrite has been the subject of several important papers recently in response to the recognition that micropores are important to the production of carbonate hydrocarbon reservoirs. The origin of micrite has generally been described as a micro dissolution and reprecipitation process (often referred to as Ostwald ripening), with nanometer-sized depositional particles being dissolved and larger crystals (micrite) averaging 2 μm in diameter being precipitated. These conclusions were tested by detailed scanning electron microscope (SEM) observations of micrite and minimicrite crystals found in the mid-Pliocene to upper Miocene section of the Clino core taken on the western edge of the Bahama Bank. Minimicrite in this data set is shown to be composed of both aragonite and calcite with calcite being the dominate mineral. In addition, micrite crystals are composed of cemented nanometer-sized calcite crystals and are not individually precipitated calcite crystals. As a result, the faces of the micrite are anhedral and knobby in appearance rather than being smooth, euhedral crystal faces. Extensive size measurements could find no size selectivity in the dissolution of the calcite minimicrite, indicating that the Ostwald ripening process is not active. Aragonite and calcite crystals are dissolved and some calcite crystals act as nuclei for the precipitation of the dissolved carbonate. The origin of the micropores is also debated. Some authors call upon a dissolution event to increase porosity of a partially cemented micrite, based largely on the anhedral nature of the micrite. Others conclude that porosity is originally inherited from the deposition lime mud and that porosity is lost by overgrowth cementation, which results in euhedral micrite crystals. The observations presented here show that anhedral crystals are due to the inclusion of nanometer calcite crystals rather than to dissolution of euhedral crystals. Lastly, these micrite crystals are formed by calcite and aragonite sediment precipitated from an aragonitic sea, disproving the assertion of some authors that porous micrite only forms from sediments deposited in calcitic seas. 相似文献
19.
Like many other coastal states, management of Canada’s offshore areas is complicated by the division of authority among differing government departments and agencies. However, as a Confederation, this administrative complexity in Canada is further exacerbated by the jurisdictional division of powers between the Federal Parliament and the Provincial Legislatures. The most common tool for overcoming this division and facilitating cooperation are formalized non-binding agreements known as Memoranda of Understanding (MOUs). While there are a large number of MOUs in existence in Canada, few are being implemented. In part, this is because the non-binding nature of the agreement means that either party may discard their obligations at will. This has led to many useful MOUs being discarded and years of work and resources expended negotiating these agreements being wasted. This paper discusses the findings from three such agreements, each focusing on efforts to manage Canada’s offshore resources. It highlights the importance of six factors capable of increasing the likelihood that any given MOU aimed at collaboration between different authorities will be successful. These factors include: a foundation of cooperation, clear statement of priorities, feasible and adaptable work plans, integration at various management levels, a legislative foundation, and adequate financial resources. 相似文献
20.
黄河口新口门海域流场分析 总被引：3，自引：1，他引：3
1996年9月在黄河口新口门附近海域设置3个断面9个站位,对海流、水温、盐度和含沙量进行了连续2个潮周期多层次同步观测。结果表明：新口门属不正规的半日潮型。流速口门前大于两侧,左侧最小,深水区大于浅水区,流速垂向分布呈不均匀现象,表层大于底层频率最高。含沙量垂向分布为上小下大,泥沙输移方向口门处与径流方向一致,其它部位与潮汐相对应。泥沙扩散范围达500km^2。 相似文献