Parasitic barnacles (Cirripedia: Rhizocephala) from New Zealand off‐shore waters     

J⊘rgen Lützen  Henrik Glenner  Anne‐Nina Lörz 《新西兰海洋与淡水研究杂志》2013,47(2):613-621

Nine genera and species of rhizocephalans were recorded from the off‐shore waters around New Zealand. Mitochondrial and nuclear gene sequences were used to examine base differences between the European and New Zealand species of Parthenopea. Serial sections to study the internal structures of the reproductive organs were made for the genera Thylacoplethus and Thompsonia. Two species, Parthenopea australis n. sp. and Thylacoplethus novaezealandiae n. sp. are new to science and described in detail. Parthenopea australis n. sp. is the first rhizocephalan species recorded from the vicinity of active cold seeps. Three rhizocephalans could not be identified as they were parasitised by hyperparasitic cryptoniscine isopods. The decapodhost species comprised the taxa Paguridae, Lithodidae, Galatheidae, Chirostylidae, and Callianassidae.  相似文献   

Abergasilus amplexus Hewitt, 1978 (Ergasilidae: Copepoda) from New Zealand,with a description of the male     

J. B. Jones 《新西兰海洋与淡水研究杂志》2013,47(3):275-278

The male of Abergasilus amplexus Hewitt, 1978 is described for the first time. Previous records of A. amplexus are discussed and a new locality, Te Whanga Lagoon, Chatham Islands, is reported.  相似文献   

A new species of Plaxiphora (Mollusca: Polyplacophora) from southern New Zealand     

R. C. Murdoch 《新西兰海洋与淡水研究杂志》2013,47(2):175-178

Plaxiphora boydeni n.sp. from wave‐exposed rocky shores of southern New Zealand is described and illustrated. This is the first published record of the genus from the New Zealand mainland. P. boydeni is readily distinguished from the 2 other New Zealand species of the genus, which occur in the subantarctic region, by the absence of bristle‐tufts on the girdle.  相似文献   

象山港养殖大黄鱼寄生新贝尼登虫成虫形态学和28S rDNA,ITS1分子鉴定     

苗亮  李明云  蒋进  丁文超  陈炯  史雨红 《海洋学报》2012,34(2):122-128

贝尼登类单殖吸虫是象山港海水养殖鱼类中一类危害严重的寄生虫。应用PCR扩增及DNA序列分析的分子生物学手段,并结合对成虫的形态学分析,对象山港养殖大黄鱼体表寄生的贝尼登类单殖吸虫(记作XSp)进行了种类鉴定,结果表明XSp从形态特征上属于新贝尼登虫属,与梅氏新贝尼登虫高度相似。扩增得到XSp的28S rDNA和ITS1序列长度分别为393和427 bp,与梅氏新贝尼登虫和鱾新贝尼登虫的5个28S rDNA 序列、2个ITS1序列的比对分析显示相似性除1个为97.4%外其余均大于99%,提示XSp与这几个鱾新贝尼登虫和梅氏新贝尼登虫为种内关系,而XSp与贝尼登虫的3个28S rDNA 和1个ITS1序列相似性分别为84.3%~89.5%和60.2%。系统进化树显示该吸虫与梅氏新贝尼登虫和鱾新贝尼登虫形成一个紧密的簇,而与贝尼登虫亲缘关系较远。根据普通生物学和序列特征分析,将XSp定种为梅氏新贝尼登虫,并且支持Whittington和Horton (1996)提出的梅氏新贝尼登虫和鱾新贝尼登虫为同种异名的分类观点。  相似文献   

Enoplus taipingensis, a new species of marine nematode from the rocky intertidal seaweeds in the Taiping Bay, Qingdao     

ZHANG Zhinan  ZHOU Hong 《海洋学报(英文版)》2012,31(2):102-108

One new species of free-living marine nematodes Enoplus taipingensis sp.nov.from the rocky intertidal seaweeds in the Taiping Bay,Qingdao is described and illustrated with scanning electron microscopy observation and 18S rRNA gene sequence analysis.Enoplus taipingensis is characterized by special arrangement of lateral setae on the tail,three cervical setae,distal structure on the supplement,and much longer body length with bigger De Man ratio "a".Type specimens are deposited in the College of Marine Life Science,Ocean University of China.  相似文献   

渤海湾潮下带底栖线虫群落的垂直分布     

张青田  王新华  胡桂坤 《海洋科学进展》2012,30(3):416-422

2007年春季在渤海湾天津潮下带采集小型底栖生物样品,分析沉积物中自由生活线虫的垂直分布情况。多元统计分析结果表明,底栖线虫的垂直分布和沉积物深度有关。在较深的5～10cm层,线虫群落与其上层次的差异较大:0～2cm层和5～10cm层差异极显著(P=0.001),2～5cm层和5～10cm层间差异显著(P=0.016)。不同站点间底层的线虫群落差异明显。而沉积物0～2cm层和2～5cm间的线虫群落差异不明显(P=0.541)。列出了SIMPER分析中16种明显影响表层-底层群落的线虫,13种明显影响中层-底层间群落比较的线虫。在研究和比较线虫群落时,应该考虑取样深度的影响。  相似文献   

MOLECULAR TAXONOMY OF SYMBIOTIC DINOFLAGELLATES IN SCLERACTINIAN CORALS     

《海洋与湖沼》2012,43(4)

通过nlsrDNA（nuclearlarge．subunitribosomalDNA）及nssrDNAfnuclearsmall．subunitri．bosomalDNA）的PCR—RFLP研究广东徐闻地区8科15属25种62个造礁石珊瑚样本的共生藻。结果表明,共生藻nlsrDNA的RsaI酶切基因型只存在一种,属于C系群共生藻;而nssrDNA的MobI和TaqI两种酶切都存在两种基因型。实验进一步通过PCR直接测序法得到62个造礁石珊瑚样品的共生藻ITS序列,与GenBank上的4种虫黄藻ITS序列构建Neighbor．Joining系统发育树,结果表明该区的造礁石珊瑚共生两种不同种类（亚系群）的共生藻,分别为c1亚系群与C15亚系群共生藻,两个亚系群间的遗传距离为0．019。广东徐闻地区造礁石珊瑚共生藻多样性偏低,暗示该地区珊瑚礁生态系统应对环境变化的能力可能较弱。  相似文献   

A new species of Eunice (Polychaeta: Eunicidae) from Hainan Island, South China Sea     

吴旭文  孙瑞平  刘瑞玉 《中国海洋湖沼学报》2013,31(1):134-139

Ataxonomic survey of benthic marine animals from coastal regions of Hainan Island, South China Sea, revealed specimens of a new species of Eunice (Polychaeta: Eunicida: Eunicidae), Eunice uschakovi n. sp., collected from the intertidal zone. The species belongs to the group of Eunice that has yellow tridentate subacicular hooks and branchiae scattered over an extensive region of the body. It resembles E. miurai and E. havaica in having both bidentate and tridentate falcigers, but can be readily distinguished by branchial features. Comparisons between E. uschakovi and the two related species are presented.  相似文献   

干旱区沙地长期培肥对土壤线虫群落特征的影响   总被引：2，自引：1，他引：1  

王雪峰  苏永中  杨晓  刘文杰  杨荣 《中国沙漠》2011,31(6):1416-1422

为了研究干旱区沙地长期培肥对农田土壤线虫群落结构的影响,通过定位实验设计5种培肥方式,采集分析土壤样品中的线虫群落组成特征。实验中共捕获线虫18 337条,归属22科30属。群落分析结果表明,施用有机肥促进线虫总数中植物寄生线虫（PP）比例的增加,瓦斯乐斯卡指数（WI）在M3处理中最低为0.98±0.22,有机肥增加了土壤线虫群落的物种多样性和营养类群多样性;长期施用化肥能够抑制植物寄生线虫（PP）,提高食细菌线虫（BF）和食真菌线虫（FF）在线虫总数中的比例,瓦斯乐斯卡指数（WI）在NPK3处理中最高为2.51±1.12,化学肥料降低了线虫群落的物种多样性和营养类群多样性,辛普森指数（Dom）和营养类群指数（TD）分别在NPK3处理中达到最低值0.13±0.01和2.34±0.07。线虫区系分析结果表明,合理的有机-无机肥配施有利于农田土壤生态系统的稳定健康发展。本研究从土壤生物学角度揭示了不同施肥措施对农田地下土壤生态过程的影响,对于保护干旱区土壤环境和农业的可持续发展具有重要意义。  相似文献   

AFLP技术在笛鲷的仔鱼鉴定及其分类学上的研究   总被引：24，自引：3，他引：21  

张俊彬  黄良民  陈真然 《海洋学报》2005,27(2):165-171

以南沙群岛采获的勒氏笛鲷(Lutjanus russelli)、黄笛鲷(Lutjanus lutjanus)、红笛鲷(Lut janus sanguineus)、紫红笛鲷(Lutjanus argentimaculatus)、金焰笛鲷(Lutjanus fulviflamma)、线纹笛鲷(Lutjanus lineolatus)、画眉笛鲷(Lutjanus vitta)、马拉巴笛鲷(Lutjanus malabarius)、驼背笛鲷(Lutjanus gibbus)、约氏笛鲷(Lutjanus johni)、金带笛鲷(Lutjanus vaigiensis)11种笛鲷属的后期仔鱼为材料, 进行了基因组DNA的AFLP(扩增片段长度多态性)研究,通过笛鲷仔鱼和成鱼的AFLP电泳图谱的比较分析,将这11种笛鲷属的仔鱼成功分开.研究表明,最适合的AFLP引物组合是E+AGC/M+CAA,由这11种笛鲷共扩增出132 AFLP位点,每种笛鲷的AFLP条带数为43~69,在这11种笛鲷中,共享的AFLP条带数仅为7,同一种笛鲷仔鱼和成鱼AFLP遗传相似度在90%以上.根据这11种笛鲷的Nei遗传距离对Neighboring系统进行进化分析,并且与传统的笛鲷形态分类进行了比较.分子生物学可以阐释笛鲷属鱼类的系统进化和遗传亲缘关系,对传统形态分类学加以完善和补充.  相似文献