东山岛周围海域各类水母的分布   总被引：5，自引：0，他引：5  

黄加祺  许振祖 《台湾海峡》1996,15(4):363-365

本文分析了１９９０年春至１９９１年冬采自东山岛周围海域的浮游动物样本。共鉴定６０种水线，水螅水母类在种数和数量上的均占优势。拟细浅室水母，球型侧腕水母和半口壮丽水母为优势种。  相似文献   

细尾属吸虫一新种     

刘升发 《热带海洋》1997,16(1):75-79

从大头狗母鱼的消化道内检获细尾属１新种：厦门细尾吸虫，新种，新种与狗母鱼细尾吸虫，１９７０和带鱼细吸虫，１９７８相似，但它们可以从虫体大小和虫卵大小以及其他形态特征相区别。  相似文献   

双拖网网口扩张的估算方法     

侯恩淮  潘辉明  王有党 《中国海洋大学学报(自然科学版)》1989,(Z2)

本文用计算确定双拖网曳纲的空间形状与张力,估算在一定拖速下两船间距、水深与网具水平扩张的关系。根据模型试验测出的水平与垂直扩张值,换算出双拖网网口高度并与实测结果比较。可针对各级渔轮和生产条件,广泛计算并列出图表,以便在生产中用于双拖网调整。  相似文献   

西沙群岛的棘皮动物 Ⅰ.海参纲     

廖玉麟 《海洋科学集刊》1975,(10):199-230

中国科学院海洋研究所曾多次到我国西沙群岛进行海洋生物的采集工作；作者参加过一次考察，并对该岛的棘皮动物进行过专门的采集与观察。 富饶的西沙群岛，盛产海参，有的地方，可谓俯拾皆是。全世界约40种海参可供食用，而西沙群岛即产有20种。世界上一些名贵的种类，例如梅花参、黑乳海参、蛇目白尼参和辐肛参等，该岛均有出产。 本文报道了经济意义较大的海参纲动物的研究结果，共检查了标本425个，鉴定为41种，分隶于3目，5科，16属，内有一新种，有14种在我国系首次记录。  相似文献   

Species Diversity and Abundance Distribution of Pelagic Siphonophores in Nan Wan Bay of Taiwan, China, in Late Autumn and Early Winter     

张金标黄将修  连光山唐森铭 《海洋通报(英文版)》2005,7(2):30-40

Zooplankton surveys were carried out on November 2-3 and December 8-10, 2001 at 12 stations in the Nan Wan Bay of Taiwan, China. Altogether 92 quantitative zooplankton samples were collected from subsurface water and bottom water layers with two conical plankton nets （180 cm in length, 45 cm in opening diameter, 333μm and 200 larn in mesh size）. A total of 31 species of Siphonophores were identified, among them 7 species are new records in the waters around Taiwan Island, of which Rocacea cymbiformis is a new record in China. Dominated by Chelophyes appendiculata, Bassia bassensis, Diphyes bojani, Diphyes dispar, Abylopsis eschscholtzi and Chelophyes contorta, these species accounted for over 76 % and 63 % of the total abundance in November and December. The species number and Siphonophores abundance in December （25 species, 1.99 inds/m3） were more than those in November （19 species, 0.438 inds/m3）, and they were more in the surface water layer than in the bottom layer at most sampling stations. In early winter, the offshore high salinity water mass was a main factor influencing the distribution. The sampling efficiency for two plankton nets is discussed and the seasonal variation of species number and abundance in the Nan Wan Bay is compared with that in the neighboring waters.  相似文献   

罗源湾水母类的生态研究     

黄加祺  许振祖 《热带海洋》1993,12(1):89-93

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西沙群岛的棘皮动物 Ⅴ.海百合纲和总结     

廖玉麟 《海洋科学集刊》1983,(20):263-278

本文是西沙群岛棘皮动物研究报告的最后部分,包括海百合纲和总结。研究材料和以前一样是中国科学院海洋研究所采集的标本。西沙群岛珊瑚礁海百合种类不多,数量也很贫乏。共采56个标本,通过研究鉴定,仅包括3种海羊齿(Comatulids)，其中有一种在我国是首次记录。  相似文献   

提问蔚蓝     

《海洋世界》2013,(7):71

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软甲纲(节肢动物门:甲壳动物亚门)系统发育线粒体基因组研究     

申欣  田美  阎斌伦  朱嘉濠 《海洋学报(英文版)》2015,34(2):84-92

Along with the sequencing technology development and continual enthusiasm of researchers on the mitochondrial genomes, the number of metazoan mitochondrial genomes reported has a tremendous growth in the past decades. Phylomitogenomics—reconstruction of phylogenetic relationships based on mitochondrial genomic data—is now possible across large animal groups. Crustaceans in the class Malacostraca display a high diversity of body forms and include large number of ecologically and commercially important species. In this study, comprehensive and systematic analyses of the phylogenetic relationships within Malacostraca were conducted based on 86 mitochondrial genomes available from Gen Bank. Among 86 malacostracan mitochondrial genomes, 54 species have identical major gene arrangement(excluding t RNAs) to pancrustacean ground pattern,including six species from Stomatopoda, three species from Amphipoda, two krill, seven species from Dendrobranchiata(Decapoda), and 36 species from Pleocyemata(Decapoda). However, the other 32 mitochondrial genomes reported exhibit major gene rearrangements. Phylogenies based on Bayesian analyses of nucleotide sequences of the protein-coding genes produced a robust tree with 100% posterior probability at almost all nodes. The results indicate that Amphipoda and Isopoda cluster together(Edriophthalma)(BPP=100).Phylomitogenomic analyses strong support that Euphausiacea is nested within Decapoda, and closely related to Dendrobranchiata, which is also consistent with the evidence from developmental biology. Yet the taxonomic sampling of mitochondrial genome from Malacostraca is very biased to the order Decapoda, with no complete mitochondrial genomes reported from 11 of the 16 orders. Future researches on sequencing the mitochondrial genomes from a wide variety of malacostracans are necessary to further elucidate the phylogeny of this important group of animals. With the increase in mitochondrial genomes available, phylomitogenomics will emerge as an important component in the Tree of Life researches.  相似文献   

香山群的解体及地层时代的重新厘定   总被引：3，自引：0，他引：3  

谢从瑞  校培喜  由伟丰  曹宣铎  胡云绪  周志强  高晓峰 《地层学杂志》2010,34(4)

宁夏一带的香山群,由于各种原因,其时代和地层的划分自建立以来一直处于争论不休的状态。产生这种问题的原因最终聚集在两个问题上的分歧:香山群的地层构造和化石产出部位的沉积构造环境分析上。根据野外的实际观察及前人资料的综合分析,香山群的构造并非成简单的单斜排列,各个单元的沉积也各具特征。其中第一和第三亚群(包括徐家圈组第四段)为秦—祁—贺裂陷槽裂陷初期的产物,分布于盆地的东缘,时代为中寒武—晚寒武世;第二亚群(不含徐家圈组第四段)和第四亚群为裂陷槽裂陷中晚期的产物,主要分布于盆地的西北缘,时代为奥陶纪。结合区域地层的综合分析,提出了早古生代贺兰裂陷盆地的沉积充填模式及地层格架。  相似文献