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Population dynamics of marine ciliate Euplotes vannus (Protozoa, Ciliophora) in different artificial seawaters 被引量:3
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作者 许恒龙 朱明壮 +3 位作者 姜勇 高珊 MIN Gi-Sik AL-RASHEID Khaled A.S. 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2011年第1期109-117,共9页
To study population dynamics of marine ciliates in different artificial seawaters (ASW), the population growth dynamics of a common marine ciliate Euplotes vannus were investigated using beef extract media and rice ... To study population dynamics of marine ciliates in different artificial seawaters (ASW), the population growth dynamics of a common marine ciliate Euplotes vannus were investigated using beef extract media and rice media for five types of ASW and natural seawater (NSW). The results show that: (1) the population growth rate was in the order of NSW〉Flack ASW〉Nakamula ASW〉Schmadz ASW〉Oshima ASW〉Subow ASW and was considerably higher in rice media than in beef extract media (apart from Subow ASW); (2) the maximum density of E. vannus in stationary phase in each treatment was ranked as Hack ASW〉Nakamula ASW〉Schmadz ASW〉NSW〉Oshima ASW〉Subow ASW, and was again higher in rice media than in beef extract media (except for Subow ASW); (3) the exponential and stationary phases were longer in rice media than in beef extract media; (4) strains of E. vannus that had been domesticated for 〉1 year in ASW grew significantly slower, with lower maximum density and longer stationary phase than those isolated and maintained in NSW. It was demonstrated that: (1) E. vannus may grow well in Flack, Nakamula and Schmads ASW compared with NSW (mainly in terms of growth rate); and (2) Oshima ASW is the preferred choice for stock cultures of E. vannus, but the ASWs Flack, Nakamula and Schmadz are preferred for mass culture. These findings suggest that these three ASWs are effective for the cultivation of marine protozoa for experimental studies on ecology, toxicology and molecular biology. 展开更多
关键词 artificial seawater culture ECOLOGY marine ciliate population dynamics
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Notes on Two Marine Ciliates from the Yellow Sea,China:Placus salinus and Strombidium apolatum(Protozoa,Ciliophora) 被引量:3
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作者 XUDapeng SONGWeibo HUXiaozhong 《Journal of Ocean University of China》 SCIE CAS 2005年第2期137-144,共8页
The living morphology and infraciliature of two rare marine ciliates, Placussalinus Dietz, 1964 and Strombidium apolatum Wilbert and Song, 2005, collected from the coastalwaters near Qingdao, China, were investigated ... The living morphology and infraciliature of two rare marine ciliates, Placussalinus Dietz, 1964 and Strombidium apolatum Wilbert and Song, 2005, collected from the coastalwaters near Qingdao, China, were investigated by in vivo observation and protargol impregnationtechnique. The improved diagnosis for Placus salinus is as follows: medium-sized marine Placus, invivo (50-60) μm X (30-40) μm; cell elliptical to barrel-shaped; 28-31 somatic kineties; singlemacronucleus usually ellipsoid and one micronucleus located in the indention of the macronucleus;one contractile vacuole posteriorly positioned. Strombidium apolatum is characterized by: marinestrombidium (40-60) μm X (30-45) μm in vivo, cordiform in shape with somewhat pointed posteriorend and conspicuous apical protrusion; extrusomes prominent, about 15 μm in length and evenlyarranged along the circle kinety; about 16 collar and 5-6 buccal membranelles; one elongatemacronucleus and one micronucleus; circle and ventral kineties consisting of about 53 and 45dikinetids respectively. 展开更多
关键词 marine ciliates Placus salinus Strombidium apolatum
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Divisional morphogenesis in the marine ciliate Anteholosticha manca (Kahl,1932) Berger,2003 (Ciliophora:Urostylida) 被引量:1
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作者 LI Liqiong HU Xiaozhong +4 位作者 WARREN Alan AL- RASHEID Khaled A S AL- FARRAJ Saleh A SHAO Chen SONG Weibo 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2008年第2期157-163,共7页
The cortical development and macronuclear evolution of the marine hypotrichous ciliate Anteholosticha manca, collected from the coastal waters near Qingdao, China, were investigated using the protargol impregnation me... The cortical development and macronuclear evolution of the marine hypotrichous ciliate Anteholosticha manca, collected from the coastal waters near Qingdao, China, were investigated using the protargol impregnation method. The morphogenesis of A. manca is generally typical for the genus, and can be characterized as the following features : ( 1 ) in the proter, a new oral primordium is formed on the bottom (beneath the pellicle) of the buccal cavity, disorganization of the parental undulating membranes do not contribute to the formation of this primordium ; (2) FVT-cirral anlagen in both dividers develop independently, and very likely only a few midventral cirri join in the formation of these primordia; ( 3 ) both marginal row and dorsal kinety anlagen develop intrakinetally within the parental structure; (4) at the middle stage, macronuclear segments fuse together to form a single mass as observed in most of its related forms. 展开更多
关键词 HYPOTRICHS marine ciliate MORPHOGENESIS Anteholosticha manca
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Taxonomic Studies on a New Marine Ciliate, Apocoleps magnus gen. nov., spec. nov. (Ciliophora, Colepidae), Isolated from Qingdao, China 被引量:1
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作者 CHEN Xiangrui Alan Warren SONG Weibo 《Journal of Ocean University of China》 SCIE CAS 2009年第4期317-321,共5页
The morphology and infraciliature of a new marine colepid ciliate, A'pocoleps magnus gen. nov., spec. nov., are de- scribed based on living observations and silver impregnations. The new genus Apocoleps is characteri... The morphology and infraciliature of a new marine colepid ciliate, A'pocoleps magnus gen. nov., spec. nov., are de- scribed based on living observations and silver impregnations. The new genus Apocoleps is characterized by having 8 (vs. 6 in most other related genera) armour tiers, spines at both ends of the cell, 3 adoral organelles and plates with 4 reniform uni-windows. Apo- coleps magnus spec. nov. is defined by the following features: body elongated and slightly curved, about 100-120p.mx 3545 lam in vivo; anterior tertiary tier plate with four uni-windows, most secondary and main tier plates with four uni-windows, posterior tertiary tier plate with two uni-windows; left plate margin slightly serrated; on average 23 transverse and 22 longitudinal ciliary rows; one terminal contractile vacuole; marine habitat. 展开更多
关键词 marine ciliates new genus new species taxonomy
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Acute Toxicities of Potassium Permanganate, Formalin, and Lugol's Iodine Solution to a Marine Ciliate, Pleuronema coronatum (Ciliophora, Scuticociliatida) 被引量:1
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作者 QIU Yantao SONG Weibo 《Journal of Ocean University of Qingdao》 2002年第2期211-214,共4页
Acute toxicities of potassium permanganate, formalin, and Lugol’s iodine solution to a commonly occurred marine ciliate Pleuronema coronatum (Ciliophora, Scuticociliatida) were measured. Linear regression analysis of... Acute toxicities of potassium permanganate, formalin, and Lugol’s iodine solution to a commonly occurred marine ciliate Pleuronema coronatum (Ciliophora, Scuticociliatida) were measured. Linear regression analysis of the results highlighted the close relationships between doses of the medicines and mortalities of the organisms, thus providing a capability to predict toxicity effects from the dose. Toxic effects of the medicines on the ciliates were described in the present paper, and the median lethal concentrations (LC 50 values) were given. Results of measurements indicated that 2 h-LC 50 and 12 h-LC 50 values of formalin on P. coronatum were 59.00×10 -6 and 43.57×10 -6, while those of Lugol’s solutions were 90.13 and 67.84×10 -6 respectively. The tolerance of P. coronatum to formalin is apparently lower than that to Lugol’s iodine solution and potassium permanganate is a suitable medicine to kill ciliates in short time. 展开更多
关键词 TOXICITY potassium permangante FORMALIN Lugol's iodine solution LC_(50) value Pleuronema coronatum marine ciliate
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ON THE MARINE CILIATE, Pseudocohnilembus hargisi(PROTOZOA, CILIOPHORA, SCUTICOCILIATIDA) WITH COMPARISON OF ITS RELATED SPECIES
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作者 龚骏 马宏伟 宋微波 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2002年第3期261-265,共5页
The living morphology, nuclear apparatus, infraciliature and silverline system of the poorly known ciliate Pseudocohnilembus hargisi Evans & Thompson, 1964, collected from a shrimp culture pond in Qingdao, China, ... The living morphology, nuclear apparatus, infraciliature and silverline system of the poorly known ciliate Pseudocohnilembus hargisi Evans & Thompson, 1964, collected from a shrimp culture pond in Qingdao, China, were examined by observation of the live specimen; and by the pyridinated carbonate method and Chatton Lwoff technique. The main characteristics: 13-14 (usually 13) longitudinal or slightly spirally arranged somatic kineties; single contractile vacuole with usually 2 (1-2) pores at posterior ends of the fourth and fifth somatic kineties to the right of the buccal cavity. Several related congeners were compared and morphometrically tabulated. 展开更多
关键词 Pseudocohnilembus hargisi morphology and taxonomy marine ciliates
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Ecological functions of ciliated protozoa in marine ecosystem: effects of ammonium on the population growth of Euplotes vannus 被引量:1
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作者 许恒龙 Song Weibo +3 位作者 Zhu Mingzhuang Wang Mei Ma Honggang Xu Xiaozhong 《High Technology Letters》 EI CAS 2005年第4期432-436,共5页
The effects of ammonium on the population growth of the marine ciliate, Euplotes vannus, were examined using ecotoxicological method, h is showed that ammonium exerts inhibitory effects on the growth of the ciliate po... The effects of ammonium on the population growth of the marine ciliate, Euplotes vannus, were examined using ecotoxicological method, h is showed that ammonium exerts inhibitory effects on the growth of the ciliate populations in a concentration-dependent way. Statistical analvsis reveals that the population growth dynamics exposed to ammoniunt-N concentration over 100mg/L are significantly different from that in the control at P 〈 0.05 level. Linear regression determined that the 24h, 36h, 48h, 60h, 72h and 84h IC50 values of ammonium-N are 19.68, 201.51, 167.49, 47.86, 50.43 and 43.11 concentration over 100mg/L, respectively ( P 〈 0.05; pH 8.2; salinity 28 ppt; temperature, 25℃ ). The results indicate that the tolerance to ammonium in E. vannus is considerably higher than that of the larvae or juveniles of some metozoa, such as cuhured prawns and oysters. Therefore, it is believed that the high tolerance to ammonium is necessary for eiliated protozoa to play positive roles in maintaining and improving water quality in marine ecosystems, especially in the intensive aquacuhure waters with high-level ammonium. In addition, the correlation between /C50 values and exposure time was discussed. 展开更多
关键词 marine ciliates growth response AMMONIA MARICULTURE ECOTOXICOLOGY
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Complementary Notes on a ‘Well-known’ Marine Heterotrichous Ciliate, Folliculinopsis producta (Wright, 1859) Frauré-Fremiet, 1936 (Protozoa, Ciliophora)
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作者 JIDaode LINXiaofeng SONGWeibo 《Journal of Ocean University of China》 SCIE CAS 2004年第1期65-69,共5页
The living morphology and infraciliature of a heterotrichous ciliate, Folliculinopsis producta (Wright, 1859) Frauré Fremiet, 1936, which was collected from the north coast of China, were investigated by in vivo ... The living morphology and infraciliature of a heterotrichous ciliate, Folliculinopsis producta (Wright, 1859) Frauré Fremiet, 1936, which was collected from the north coast of China, were investigated by in vivo observation and protargol impregnation techniques. As a new contribution, a redescription is presented: large Folliculinopsis of green to dark green in color, 800-1500 μm in size; two peristomial lobes of approximately equal size, 300-400 μm in length; adoral zone of membranelles containing about 1000 membranelles, lying along lobe margins and exhibiting two circles within buccal cavity; 50-70 somatic kineties in mid body; macronucleus miniliform, consisting of about 20 beads; lorica smooth, vase shaped, (300-500) μm×(90-130) μm in size, with 5-12 spiral ridges on neck tube; marine habitat. 展开更多
关键词 marine ciliate CILIOPHORA Heterotrichida Folliculina Folliculinopsis producta
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On four closely related hypotrichous ciliates(Protozoa,Ciliophora,Spirotrichea):molecular characters,interspecific relationships and phylogeny defined with multigene sequence information
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作者 GAO Feng YI Zhenzhen +2 位作者 CHEN Zigui AL-RASHEID Khaled A S SONG Weibo 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2010年第5期90-96,共7页
In order to clarify the phylogeny and relationships of the most confused hypotrichous ciliates,Holosticha-complex,four closely related holostichids(five populations),Holosticha bradburyae,H.diademata,Anteholosticha ... In order to clarify the phylogeny and relationships of the most confused hypotrichous ciliates,Holosticha-complex,four closely related holostichids(five populations),Holosticha bradburyae,H.diademata,Anteholosticha sp.,and A.manca,were compared and analyzed using ITS2 secondary structures,ITS1-5.8S-ITS2 region and SSrRNA gene sequences.The ITS1-5.8S-ITS2 region sequences of these four species were first sequenced,and they shared sequence identities ranging from 68.0% to 90.1%,while two populations of Anteholosticha sp.differed in three nucleotides(sequence identity 99.8%).There were several minor differences among ITS2 secondary structures of these species,while two populations of Anteholosticha sp.had the identical secondary structure.Phylogenetic trees inferred from the ITS1-5.8S-ITS2 region sequences of stichotrichs using multiple algorithms(Neighbor-Joining,Maximum Parsimony and Bayesian) revealed similar topologies.The results show that:(1) Holosticha bradburyae and H.diademata firmly clustered together with strong bootstrap supports,forming a sister clade with Anteholosticha sp.,(2) Anteholosticha appeared to be a paraphyletic assemblage,in which the morphotype A.manca was more closely related to Diaxonella trimarginata than to its congener Anteholosticha sp.Phylogenetic analyses based on the SSrRNA gene and the combined sequences of SSrRNA gene and ITS1-5.8S-ITS2 region revealed the similar relationships between Holosticha and Anteholosticha,nevertheless their positions within the subclass Stichotrichia differed from each other inferred from different genes. 展开更多
关键词 PHYLOGENY gene sequencing marine ciliates SSRRNA ITS1-5.8S-ITS2
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Phylogenetic relationships within the genus Aspidisca(Protozoa,Ciliophora,Euplotida) revealed by ITS1-5.8S-ITS2 region sequences 被引量:2
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作者 黄洁 伊珍珍 +3 位作者 苗苗 AL-RASHEID KhaledA.S 宋微波 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2011年第2期277-283,共7页
Abstract The internal transcribed spacer regions (ITS1 and ITS2) and 5.8S rRNA genes were sequenced in six populations of four Aspidisca species, namely A. leptaspis, A. orthopogon, A. rnagna and A. aculeata. Phylog... Abstract The internal transcribed spacer regions (ITS1 and ITS2) and 5.8S rRNA genes were sequenced in six populations of four Aspidisca species, namely A. leptaspis, A. orthopogon, A. rnagna and A. aculeata. Phylogenetic trees were constructed by means of Bayesian inference (BI), Maximum Parsimony (MP), Neighbor-Joining (NJ), and Maximum Likelihood (ML) to assess the inter- and intra-species relationships within the genus Aspidisca. All trees show similar topologies with stable supports and indicate that: (1) four well known groups, i.e., Oligotrichia, Stichotrichia, Choreotrichia and Hypotrichia, are distinctly outlined within the class Spirotrichea, and all are monophyletic other than Hypotrichia; (2) members of Aspidisca can be distinguished well, based on the ITSI-5.SS-ITS2 region sequences, and A. leptaspis and A. magna shared a closer relationship than other species; (3) Aspidisca and Euplotes branch early in the subclass Hypotrichia. To compare the phylogenetic relationships based on different genes, SSU rRNA trees were also constructed with nearly the same species inclusion, which revealed different topologies of inter-species, inter-genera and inter-subclasses. 展开更多
关键词 marine ciliates Aspidisca PHYLOGENY internal transcribed spacer 5.8S rRNA
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Morphogenetic Processes in Division of Uronemella filificum (Ciliophora, Scuticociliatida) 被引量:2
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作者 MA Hongwei SONG Weibo MA Honggang 《Journal of Ocean University of Qingdao》 2002年第2期140-144,共5页
The morphogenetic processes of Uronemella filificum (Kahl, 1931) Song and Wilbert ①, were studied using protargol method. The stomatogenesis of U. filificum can be summarized as follows: membranelles 1-2, paroral mem... The morphogenetic processes of Uronemella filificum (Kahl, 1931) Song and Wilbert ①, were studied using protargol method. The stomatogenesis of U. filificum can be summarized as follows: membranelles 1-2, paroral membrane and scutica of the opisthe originate from the parental paroral membrane, while membranelle 3 in the opisthe develops from the parental scutica. The paroral membrane of the proter developes from the parental paroral membrane. The stomatogenetic sequences are similar to the previous descriptions for other related taxa. The phylogenetic position of Uronematidae is discussed in the light of morphogenetic data obtained. 展开更多
关键词 marine ciliate Scuticociliatida stomatogenesis Uronemella filificum
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Morphogenetic studies on Uronychia uncinata(Protozoa,Ciliophora)during its asexual division 被引量:1
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作者 Song Weibo 《Acta Oceanologica Sinica》 SCIE CAS CSCD 1996年第1期93-99,共8页
Morphogenesis of cell division is investigated in Uronychia uncinata based on protargol impregnated apecimens. The conical morphogenetic events are similar to that known in other euplotids but exhibiting several chara... Morphogenesis of cell division is investigated in Uronychia uncinata based on protargol impregnated apecimens. The conical morphogenetic events are similar to that known in other euplotids but exhibiting several characteristies: the oral primordium in proter being de novo developed in a subcortical pouch anterior to the parental AZM2; FC comes from anlage Ⅰ-Ⅲ; all frontoventral and transverse cirri in both proter and opisthe deriving from 5 cirral streaks; development of proter oral primordia causing partial replacement of old AZM1; caudal cirri coming from two DK anlagen. 展开更多
关键词 marine ciliate Uronychia uncinata MORPHOGENESIS conical development
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