Embryonic and larval development in barfin flounder Verasper moseri (Jordan and Gilbert)     

杜荣斌  王勇强  姜海滨  刘立明  王茂剑  李天保  张树宝 《中国海洋湖沼学报》2010,(1)

Broodstock of Verasper moseri (Jordan and Gilbert) aged 3-4 years old were selected,and reinforced cultivation was conducted to promote maturation under controlled water temperature and photoperiod conditions.Fertilized eggs were obtained by artificial fertilization,and the development of embryos,larvae and juveniles was observed continuously.The results showed that the fertilized eggs of V.moseri were spherical,with transparent yolk and homogeneous bioplasm,and had no oil globule inside.The average diamete...  相似文献   

Early development of Costaria costata (C. Agardh) Saunders and cultivation trials     

付刚  刘吉东  王高歌  姚建亭  王秀良  段德麟 《中国海洋湖沼学报》2010,(4)

Costaria costata(C.Agardh) Saunders is one of common kelps distributed in many coastal areas worldwide;however,in China,no reports have been made on cultivation of the genus.To investigate potential cultivation of the species in the northern part of China,trials on isolation and preservation of the gametophytes were conducted using C.costata from Korea;growth and development of the gametophytes were observed.We showed that at 10±1°C,60 μmol m-2s-1 and 12:12 h(L:D),freshly released zoospores settled down wit...  相似文献   

巽他海峡BAR9442岩心30 kaBP以来的沉积记录与古季风活动     

赵悦  丁旋 《地球科学》2011,36(4):610-620

为重建巽他海峡区古季风活动历史,通过对BAR9442岩心氧同位素、AMS14C测年、陆源碎屑标准偏差区间粒径分布,以及上升流种Globigerina bulloides等变化特点分析,并结合前人对该岩心粘土矿物的研究,获得如下认识:末次冰期30~17 kaBP,海平面下降,陆源粉砂物质输入增加; 南半球夏季日照率高,然而受冰期热带辐聚带位置影响,西北季风受阻,东南信风持续吹过研究海域形成类似东南季风的效应,气候冷干; 受印度东北季风影响,伊利石含量最高,上升流活动不发育, 古生产力降低.17~8 kaBP,海平面迅速上升,出现较强的表层穿越流活动,粘土物质成为沉积物的主要组分; 此时东南与西北季风都有增强,说明当时研究区气候有着更强的季节性.全新世8 kaBP以来,全球海平面上升使穿越流活动加强,沉积物粘土组分含量最大,西北季风带来温暖湿润的气候条件.   相似文献   

Geomagnetic Polarity Events in China since 2.48 Ma     

GE Tongming  LIU Jian  FAN Limin Guangzhou Marine Geological Survey  Huanshidong Ro  Guangzhou 《《地质学报》英文版》1999,73(3):348-355

This paper presents the results of palaeomagnetic studies of Cenozoic volcanic rocks and Quaternary strata in China, which have confirmed the occurence of some short-period polarity events, After a correlation with the worldwide palaeomagnetic data, a geomagnetic polarity time scale for the time since 2.48 M has been compiled.  相似文献   

莱阳盆地莱阳群恐龙足迹化石的新发现   总被引：10，自引：1，他引：9  

李日辉  张光威 《地质论评》2000,46(6):605-610

在山东莱阳盆地早白垩世莱阳群龙旺庄组发现15个足迹化石。化石产在灰绿色细砾粗砂岩(转石)的下层面,呈层底凸形(Convex hyporelief)保存。研究表明,足迹为二足行走、趾行式、三趾型,趾端具尖、长爪。足长约13 cm,长大于宽,近中趾对称。趾间角较大:平均值Ⅱ27°Ⅲ27.2°Ⅳ,Ⅱ、Ⅳ趾夹角平均54.2°。趾垫不清晰,无尾迹印痕。经研究,笔者认为这是一新的足迹类型,命名为Paragrallator ichnogen. nov.,并将其归入Coelurosauria Huene 1914次亚目,Anchisauripodidae(Lull 1904)足迹科。即该足迹系由小型兽脚类恐龙——虚骨龙类所形成。恐龙足迹形成于滨湖相—河流相环境中。  相似文献   

南海ODP1143站底栖有孔虫Cibicidoides与Uvigerina稳定氧碳同位素值的均衡试验   总被引：5，自引：3，他引：2  

田军  汪品先  成鑫荣 《地球科学》2004,29(1):1-6

从南海南部ODP184航次1143站上部合成深度190.77m共1992个样品中, 由老到新挑选了64个样品, 测试了同一样品中底栖有孔虫Uvigerina peregerina与Cibicidoides wuellerstorfi的δ18O和δ13C值, 结果表明1143站U.peregerina与C.wuellerstorfi的δ18O差值的平均值约为(0.614±0.07)×10-3, 而δ13C差值的平均值约为(0.692±0.04)×10-3.1143站U.peregerina与C.wuellerstorfi的δ18O差值与大西洋和东太平洋的标准差值0.64×10-3比较接近, 而δ13C的差值却比大西洋和东太平洋的标准差值0.9×10-3轻0.2 08×10-3, 可能是由于南沙珊瑚礁区较低的生产力缩小了沉积物与海水之间的δ13C的差异而引起的.该均衡试验为南海甚至西太平洋的古海洋学研究提供了上述2种底栖有孔虫氧碳同位素值转换的标准.   相似文献   

Altimetric Lagrangian advection to reconstruct Pacific Ocean fine-scale surface tracer fields     

Marine Rogé  Rosemary A. Morrow  Guillaume Dencausse 《Ocean Dynamics》2015,65(9-10):1249-1268

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Cloning and mRNA expression of macrophage migration inhibitory factor (MIF) gene of large yellow croaker (P seudosciaena crocea)     

MAO Yong    XU Bing  SU Yongquan  ZHANG Zhiwen  DING Shaoxiong  WANG Ding  WANG Jun Fisheries College of Guangdong Ocean University  Zhanjiang  China State Key Laboratory of Marine Environmental Science  Xiamen University  Xiamen  China 《海洋学报(英文版)》2010,29(3)

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Screening of eye-position related genes with DD-RT-PCR and RDA in the hybrids between Japanese flounder Paralichthys olivaceus and stone flounder Kareius bicoloratus     

陈妍婕  张全启  齐洁  孙业盈  钟其旺  王旭波  王志刚  李朔  李春梅 《中国海洋湖沼学报》2009,27(1)

Flatfish or flounder moves one eye to change body proportion into vertebral asymmetry during metamorphosis, during which some become sinistral while others dextral. However, the mechanism behinds the eye-position has not been well understood. In this research, hybrids between Japanese flounder(♀) and stone flounder (♂) show mixed eye-location in both dextral type and sinistral type, and thus become good samples for studying the eye-migration. mRNAs from pro-metamorphosis sinistral and dextral hybrids larvae...  相似文献   

Spatial and temporal variations of Synechococcus and picoeukaryotes in the Taiwan Strait,China     

黄邦钦  林学举  洪华生 《中国海洋湖沼学报》2009,27(1)

The size-fractionated phytoplankton biomass, and the spatial and temporal variations in abundance of Synechococcus (SYN) and picoeukaryotes (PEUK) were measured in the Taiwan Strait during three cruises (August 1997, February-March 1998, and August 1998). The results show that picophytoplankton and nanophytoplankton dominate the phytoplankton biomass, in average of 38% and 40%, respectively. SYN and PEUK varied over time in abundance and carbon biomass, greater in summer than in winter, in range of (7.70–20...  相似文献