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描述原狭蚌虫属一新种—桑梓原狭蚌虫Eoleptestheria sangziensis sp.nov.,列表比较新种与近似种东平原狭蚌虫E.dongpingensis Hu,1986的主要区别特征。有24幅形态图,包括10幅电镜照片。模式标本保存于青岛海洋大学水产学院。 相似文献
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本文对东平原狭蚌虫外壳的组织结构进行了研究。外壳由内外角质层、内外上皮层和皮下结缔组织共同组成。外角质层厚,较规则。上皮细胞有柱状细胞和具有胞突的锥形细胞两种形态。同侧及相对两侧的上皮胞突相连接,构成了许多具有血细胞的血腔隙。 相似文献
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测定了原狭蚌虫的一般营养成分及氨基酸组份、含量(干基中含蛋白质50.72％;脂肪2.14％;钙9740mg/100g;磷660mg/100g;氨基酸总含量31.29％;必需氨基酸15.06％非必需氨基酸16.23％)。列表比较了原狭蚌虫与鱼粉、虾糠粉、豆饼、花生饼、蛤仔粉的营养成分含量。它清楚的表明了原狭蚌虫能够成为一种新的动物蛋白源而用于鱼虾类的饲料中。 相似文献
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介甲目甲壳动物的研究——Ⅰ、山东的三种蚌壳虫 总被引：1，自引：0，他引：1
胡维兴 《山东海洋学院学报》1986,16(4):24-35
本文对分布在山东淡水鱼苗培育池中三种介甲耳甲壳动物进行了形态分类的描述。其中的东平原狭蚌虫Eoleplestheria dongpingensis sp．nov．及涛雒真渔乡蚌虫Eulimnadia taoluoensis sp．nov．系新种；另外一种是莱阳原蚌虫Eocyzicus laiyangensis Hu，1985。列表此较了两新种分别与其相近种Eoleptestheria chinensis Daday，1923；Eulimnadia braueriana Ishikawa，1895以及E．ovata Nayar 1965的主要形态区别特征。 相似文献
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胡维兴 《中国海洋大学学报(自然科学版)》1988,(4)
本文对分布在我国淡水池塘及水稻田中的16种介甲目甲壳动物(隶属于5科8属)进行了记述及部分种类的形态分类描述。有5种是作者近年来的新发现,其中的中华蚌壳虫Cyzicus sinensis sp nov系新种。列表比较了新种与其近似种尼泊尔蚌壳虫Cyzicus nepalensis Ueno,1967的主要形态区别特征。本文中附有亚目、科、属的检索表及形态特征图109幅。本文记述种的名录如下: 1、东北锐眼蚌虫Lynceus manchuricus Daday,1927 2、中国拟圆蚌虫Paracyclestheriasinensis Shen et Dai,1987 3、木场真渔乡蚌虫Eulimnada kobai Ueno,1940 4、涛雒真渔乡蚌虫E.raotuoensisl Hu,1986 5、东方原蚌虫Eocyzicus orientalis Daday,1915 6、蒙古原蚌虫E.mongolianus Ueno,1927 7、莱阳原蚌虫E.laiyangensis Hu,1985 8、中华蚌壳虫(新种)Cyzicus sinensis Hu,1988 sp.nov.9、窦氏隐妇蚌虫Caenestheria davidi(Simon,1886)10、川候隐妇蚌虫C.kawamurai(Ueno,1940) 11、瘦狭蚌虫Leptestheria tenuisSars,1901 12、川内狭蚌虫L.kawachiensis Ueno,1925 13、南京狭蚌虫L.nanjingensis Zhanget Chen,1976 14、新疆狭蚌虫L.xinjiangensis Hu,1987 15、中国原狭蚌虫Eoleptestheriachinensis Daday,1923 16、东平原狭蚌虫E.dongpingensis Hu, 相似文献
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胡维兴 《中国海洋大学学报(自然科学版)》1993,(4)
本文对栖息在我国淡水鱼苗培育池及水稻田中的6种原蚌虫(隶属于甲壳门,鳃足纲,介甲目,蚌壳虫科)进行了分类记述。其中的兖州原蚌虫Eocyzicus yanzhouensis sp.nov.及拟莱阳原蚌虫E.paralaiyangensis sp.nov.系2新种。分别列表比较了新种与其近似种佩里原蚌虫E.perrieri Daday,1914,多刺原蚌虫E.spinfer Durga Prasad et al,1981及莱阳原蚌虫E.laiyangensis Hu,1985的主要形态区别特征。文中附有6种原蚌虫的检索表及形态特征图54幅。本文记述种的名录如次: 1.东方原蚌虫Eocyzicus orientalis Daday,1914; 2.蒙古原蚌虫E.mongolianus Ueno,1927; 3.戴维原蚌虫E.davidi(Simon,1886)Brtek et al,1984; 4.莱阳原蚌虫E.laiyangensis Hu,1985; 5.兖州原蚌虫,(新种)E.yanzhouensis sp.nov.; 6.拟莱阳原蚌虫,(新种)E.paralaiyangensis sp.nov. 相似文献
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胡维兴 《中国海洋大学学报(自然科学版)》1986,(4)
本文对分布在山东淡水鱼苗培育池中三种介甲目甲壳动物进行了形态分类的描述。其中的东平原狭蚌虫Eoleplestheria dongpingensis SP.nov.及涛雒真渔乡蚌虫Eulimnadia taoluoensis sp.nov.系新种;另外一种是莱阳原蚌虫Eocyzicus laiyangensis Hu,1985。列表比较了两新种分别与其相近种Eoleptes—theria chinensis Daday,1923;Eulimnadia braueriana Ishikawa,1895以及E. ovata Nayar 1965的主要形态区别特征。 相似文献
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胡维兴 《中国海洋大学学报(自然科学版)》1991,(3)
本文以检索表的形式记述了甲壳动物门介甲目蚌壳虫科隐妇蚌虫属的17个现生种。对其中的1个新种石泉隐妇蚌虫Caenestheria shiquanica sp.nov.进行了形态特征描述。列表比较了近似种川候隐妇蚌虫C.Kawamurai(Ueno,1940)Hu,1988与新种的主要形态区别特征。文中附有亚洲产的12种隐妇蚌虫的形态图58幅。 相似文献
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胡维兴 《中国海洋大学学报(自然科学版)》1988,(3)
本文描述了栖息在安徽省合肥市四里河附近淡水鱼苗培育池中的介甲目蚌壳虫科蚌壳虫属的一个新种—中华蚌壳虫Cyzicus sinensis Hu,1987 sp.nov.该新种是蚌壳虫属在中国的首次发现。列表比较了本新种与近似种尼泊尔蚌壳虫Cyzicus nepalensis Ueno,1967的主要形态区别特征:新种壳周缘具短毛;第1触角有感觉乳突15个(雄)及19个(雌);第2触角内、外胶有15—16节;雄性有19个体节具背棘刺,雌性则有17个体节;雄虫执握肢第4内叶内缘中部凹陷较浅,无突起;雌虫携卵肢鳃叶呈小椭圆形;雄虫尾节背缘生小齿29个,雌虫则有32个;雄虫尾爪具羽状刚毛17条,小齿38个,而雌虫则分别有9条及94个,尾爪背面中部有1个长棘。附新种与近似种的形态图20幅。模式标本保存在青岛海洋大学水产学院水产动物标本室。 相似文献
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1985-1986年作者在中国水产科学院黄海水产研究所投放于胶州湾灵山岛的人工鱼礁上获得许多苔藓虫标本,从中发现了唇口目(Cheilostomata)三个新种,本文为其描述。其中刺轴缘孔苔虫(新种) Smittina spinigera sp.nov.也发现于山东半岛北岸和浙江沿岸水域。新种的模式标本保存于中国科学院海洋研究所。 相似文献
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Soil-sized particulates have been collected on board ship by a mesh technique from the lower troposphere of the North, Equatorial and South Atlantic Ocean, northern and southern Indian Ocean, South and East China Sea and various coastal localities.Spectrographic analysis reveals that, on average, the particulates have concentrations of Mn, Ni, Co, Ga, Cr, V, Ba, and Sr which are of the same order of magnitude as those in average crustal material. In contrast, the average concentrations of Pb, Sn, and Zn are one order of magnitude higher than those in average crustal material.Within this “world-wide” average there are significant geographical variations in the distributions of Pb, Sn, and Zn which may be related to anthropogenic sources.On the basis of trace-element distributions lower tropospheric soil-sized marine particulates have been divided into four genetic components; local, zonal, inter-zonal, and global. The proportions of these components vary geographically, and each component may have both a natural and an anthropogenic fraction. 相似文献
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Tautog, Tautoga onitis, is an abundant species of fish in estuaries of the northeastern United States. Planktonic tautog larvae are abundant in summer in these estuaries, but there is little information on rates of growth of tautog larvae feeding on natural assemblages of food in the plankton. We examined abundance and growth of larval tautog and environmental factors during weekly sampling at three sites along a nearshore‐to‐offshore transect in Buzzards Bay, Massachusetts, USA during summer 1994. This is the first study of a robust sample size (336 larvae) to estimate growth rates of field‐caught planktonic tautog larvae feeding on natural diets, using the otolith daily‐growth‐increment method. The study was over the entire summer period when tautog larvae were in the plankton. The sampling sites contrasted in several environmental variables including temperature, dissolved oxygen (DO), and chlorophyll a concentration. There was a temporal progression in the abundance of tautog larvae over the summer, in relation to location and temperature. Tautog larvae were first present nearshore, with a pronounced peak in abundance occurring at the nearshore sites during the last 2 weeks in June. Larvae were absent at this time further offshore. From late June through August, larval abundance progressively decreased nearshore, but increased offshore although never approaching the abundance levels observed at the nearshore sites. The distribution and abundance of tautog larvae appeared to be related to a nearshore‐to‐offshore seasonal warming trend and a nearshore decrease in DO. Otoliths from 336 larvae ranging from 2.3 to 7.7 mm standard length had otolith increment counts ranging from 0 to 19 increments. Growth of larval tautog was estimated at 0.23 mm·day?1, and length of larvae prior to first increment formation was estimated at 2.8 mm indicating that first increment formation occurs 3–4 days after hatching at 2.2 mm. Despite spatial and temporal differences in environmental factors, there were no significant differences in growth rates at any of three given sites over time, or between sites. Because larval presence only occurred at a narrow range of temperature (17–23.5 °C) and DO (6.5–9.3 mg·l?1), in situ differences in growth did not appear to be because of differences in larval distribution and abundance patterns relative to these parameters. 相似文献
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Lars-Göran Danielsson 《Marine Chemistry》1980,8(3):199-215
Results of trace-metal analyses of water samples obtained during a cruise with the Soviet R.V. “Akademik Kurchatov” in the Indian Ocean are presented. The determinations were performed on board with atomic absorption spectrophotometry after a two-stage dithiocarbamate—Freon extraction procedure. Trace-metal concentrations found are in the same range as those found recently for similar open-ocean areas by other workers. The values for lead and zinc are probably high due to contamination. Vertical profiles indicate biogenic processes as controlling factors for the increase of cadmium, copper and nickel concentrations with depth. Iron shows an irregular depth distribution as a result of large random variations in concentration. 相似文献
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Klaus Kremling 《Marine Chemistry》1983,13(2):87-108
In June 1981, dissolved Zn, Cd, Cu, Ni, Co, Fe, and Mn were determined from two detailed profiles in anoxic Baltic waters (with extra data for Fe and Mn from August 1979). Dramatic changes across the O2H2S interface occur in the abundances of Cu, Co, Fe, and Mn (by factors of ?100). The concentrations of Zn, Cd, and Ni at the redox front decrease by factors between 3 to 5.Equilibrium calculations are presented for varying concentrations of hydrogen sulfide and compared with the field data. The study strongly supports the assumption that the solubility of Zn, Cd, Cu, and Ni is greatly enhanced and controlled by the formation of bisulfide and(or) polysulfide complexes. Differences between predicted and measured concentrations of these elements are mainly evident at lower ΣH2S concentrations.Cobalt proved to be very mobile in anoxic regions, and the results indicate that the concentrations are limited by CoS precipitation. The iron (Fe2+) and manganese (Mn2+) distribution in sulfide-containing waters is controlled by total flux from sediment-water interfaces rather than by equilibrium concentrations of their solid phases (FeS and MnCO3). The concentrations of these metals are therefore expected to increase with prolonged stagnation periods in the basin. 相似文献
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P.N. Froelich L.W. Kaul J.T. Byrd M.O. Andreae K.K. Roe 《Estuarine, Coastal and Shelf Science》1985,20(3):239-264
Concentrations of dissolved nutrients (NO3, PO4, Si), germanium species, arsenic species, tin, barium, dimethylsulfide and related parameters were measured along the salinity gradient in Charlotte Harbor. Phosphate enrichment from the phosphate industry on the Peace River promotes a productive diatom bloom near the river mouth where NO3 and Si are completely consumed. Inorganic germanium is completely depleted in this bloom by uptake into biogenic opal. The ratio taken up by diatoms is about 0·7 × 10?6, the same as that provided by the river flux, confirming that siliceous organisms incorporate germanium as an accidental trace replacement for silica. Monomethylgermanium and dimethylgermanium concentrations are undetectable in the Peace River, and increase linearly with increasing salinity to the seawater end of the bay, suggesting that these organogermanium species behave conservatively in estuaries, and are neither produced nor consumed during estuarine biogenic opal formation or dissolution. Inorganic arsenic displays slight removal in the bloom. Monomethylarsenic is produced both in the bloom and in mid-estuary, while dimethylarsenic is conservative in the bloom but produced in mid-estuary. The total production of methylarsenicals within the bay approximately balances the removal of inorganic arsenic, suggesting that most biological arsenic uptake in the estuary is biomethylated and released to the water column. Dimethylsulfide increases with increasing salinity in the estuary and shows evidence of removal, probably both by degassing and by microbial consumption. An input of DMS is observed in the central estuary. The behavior of total dissolvable tin shows no biological activity in the bloom or in mid-estuary, but does display a low-salinity input signal that parallels dissolved organic material, perhaps suggesting an association between tin and DOM. Barium displays dramatic input behavior at mid-salinities, probably due to slow release from clays deposited in the harbor after catastrophic phosphate slime spills into the Peace River. 相似文献