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浮游介形类是海洋生态系统中极为丰富的一类小型甲壳动物，是海洋浮游动物的重要组成部分。吸海萤科是介形纲吸海萤目下的一大类群，其中，浮萤族已记述21属的生物。本文报道和描述了新近采自南海中部的一个浮萤族新属新种--复合多腺浮萤。该新物种与相关属和种可通过综合相关特征进行区分：位于右不对称腺体上方的侧角腺开口于近后缘；沿其壳腹缘具有一列排列密集的边缘腺；其前器官形状的综合特点与族内其他属物种均不同；第一触角的e刚毛不具有毛或刺；第二触角内肢乳状突表现为一具有腹面中央凹的椭圆隆起，第一外肢具有一根小背前缘刺，第一与第二外肢愈合，第三与第四外肢不具有刚毛或刺；大颚的第一内肢具一根长腹侧刚毛，第二内肢具一根腹侧刚毛；小颚第一内肢具两根基部刚毛；第五肢的第一外肢仅具一根腹侧刚毛；第六肢的第一与第二外肢不具有腹侧刚毛。其壳上主要腺体及开口位置与其他已记录属种的显著区别是该新属的主要特征。 相似文献
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Maureen H. Barclay 《新西兰海洋与淡水研究杂志》2013,47(1):67-80
Several species of ostracods, new to New Zealand, are described, including Darwinula sphagna n.sp. and Cypridopsis obstinata n.sp. Limnocythere duffi Hornibrook, 1955 is placed in the genus Gomphocythere Sars, 1924, and a colour variation of Newnhamia fenestrata King, 1855 is discussed. 相似文献
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Feeding Habits of the Mesopelagic Fish Gonostoma gracile in the Northwestern North Pacific 总被引：1，自引：0，他引：1
The diet of Gonostoma gracile, a numerically abundant mesopelagic fish in the Subtropical Region and the Transition Domain of the northwestern North Pacific,
was examined using 520 specimens collected during June–July 1988, June 1995 and November 1995. The prey included mainly copepods,
ostracods, amphipods and euphausiids. Copepods and ostracods were the most abundant, comprising approximately 70% of the total
diet. There was little evidence of an ontogenetic dietary shift; Pleuromamma copepods were the most abundant prey for all size classes of fish ranging from 19 to 116 mm in standard length. The size
range of prey increased with growth, but all fish sizes examined fed mainly on 1–4 mm long prey. Luminescent copepods and
ostracods were the most abundant prey, suggesting that G. gracile detects its prey visually.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
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Craig B. Kensler 《新西兰海洋与淡水研究杂志》2013,47(3):327-340
The carapace length and total length size at first maturity in females of Jasus verreauxi (H. Milne Edwards, 1851) has been investigated by a detailed study of (a) the detection of the smallest size class with external eggs, and (b) the incidence of egg‐carrying females per size‐class interval. For the study 834 females were measured and examined at Spirits Bay, New Zealand, during mid October and late December 1966. The specimens ranged in carapace length from 12.0 cm to 23.9 cm, and in total length from 29.0 cm to 56.9 cm. The results of the study show clearly that the females reach first maturity at a carapace length or a total length larger than the present minimum legal size, i.e. a carapace length of 10.2 cm (4.02 in.), or a total length of 25.4 cm (10.0 in.). No mature females were found less than 13.5 cm carapace length, or 32.0 cm total length. First maturity was attained by the majority (50% or more) of the J verreauxi females at a carapace length of 15.3 cm or larger, or at a total length of 38.0 cm or larger. No undersized (smaller than the minimum legal size) females were present in the collections—yet 10.3% of the specimens were found to be immature. Immature females ranged in carapace length from 12.0 cm to 16.9 cm, or in total length from 29.0 cm to 41.9 cm. Being larger than the minimum legal size, all of the immature specimens examined were “harvested"—without having reached first maturity. It appears therefore that the stocks of small, immature female J. verreauxi are not protected by the present New Zealand minimum size regulation. 相似文献
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通过对2018年4—5月在南海中部黄岩海山采集的蛇尾样品进行形态学分类研究,鉴定发现棘蛇尾科Ophiacanthidae汁蛇尾属Ophiurothamnus两个新记录种:(1)双环汁蛇尾Ophiurothamnus discycla (H. L. Clark, 1911);(2)短简汁蛇尾Ophiurothamnus clausa (Lyman, 1878)。本文分别对这两个新记录种的外部形态特征和内部骨骼进行了描述,并与相似种进行了分类学讨论。 相似文献
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利用生物压片技术,通过形态学和解剖学方法,对采自我国沿岸海洋的仙菜科红藻(Ceramiaceae,Rhodophyta)进行了分类学研究,发现了我国仙菜科新记录属——盖氏藻属(新拟名)Gayliella T.O.Cho,L.McIvor et S.M.Boo。该属目前在我国共有5个种,即短毛盖氏藻(新拟名)Gayliella pmbriatum (Setchell et N. L. Gardner). T. O. Cho et S. M. Boo、优美盖氏藻(新拟名) Gayliella βaccidum (Kützing) T. O. Cho et L. McIvor、泰式盖氏藻(新拟名) Gayliella taylorii (E. Y. Dawson) T. O.Cho et S. M. Boo、马沙盖氏藻(新拟名) Gayliella mazoyerae T. O. Cho, Fredericq et Hommersand和横轴盖氏藻(新拟名) Gayliella transversalis (Collins et Hervey) T. O. Cho et Fredericq,其中前3个种为由仙菜属Ceramium归并的物种,后2个为我国的新记录种。本文对此2个新记录种进行了详细的形态学描述,并讨论了它们与中国已报道的横列仙菜Ceramium gracillimum间的关系。该研究结果丰富了我国海洋仙菜科的物种多样性。 相似文献
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原油污染对栉孔扇贝抗氧化酶活性的影响 总被引：2，自引：0，他引：2
以原油水溶性成分(water soluble fraction of crude oil,WSF)为污染物,采用暴露实验法,研究了栉孔扇贝(Chlamys farreri)鳃和消化腺组织中超氧化物歧化酶(Superoxide Dismutase,SOD)和过氧化氢酶(Catalase,CAT)活性的变化.结果表明,WSF污染下,鳃和消化腺组织SOD和CAT酶活性随暴露时间增加一般表现为降低-升高-降低的趋势,酶活性达到最高的时间随浓度不同而变化.第1天时消化腺SOD在0.08 mg/L浓度下被诱导,而后随时间增加表现为抑制效应;浓度为0.21和0.88 mg/L时消化腺SOD酶活性被抑制,随暴露时间延长而活性增加.暴露时间为4d时,石油烃浓度在0.08和0.88 mg/L时鳃组织SOD酶活性均被抑制,而浓度为0.21 mg/L时被诱导.消化腺和鳃组织SOD可以作为扇贝被污染胁迫的指标. 相似文献
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ＰｒｏｐａｇａｔｉｏｎａｎｄｇｒｏｗｔｈｏｆＰｏｎｎｏｔｈｅｒｅｓｐｈｏｌａｄｉｓｌｉｖｉｎｇｉｎｍａｎｔｌｅｃａｖｉｔｙｏｆＨｉａｔｕｌａａｃｕｔａＹａｎｇＹａｏｃｏｎｇ,ＬｉＦｕｘｕｅ１,ＣａｉＬｉｚｈｅ（ＲｅｃｅｉｖｅｄＡｐｒｉｌ２４,１９９７... 相似文献
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逐步线性回归法实现中华虎头蟹(Orithyia sinica) 形态指标与体重的通径分析 总被引：2，自引：0，他引：2
为探讨中华虎头蟹(Orithyia sinica)形态指标与体重的关系, 为良种选育提供最佳的测量指 标, 实验以中华虎头蟹为材料, 测量甲宽、甲长、眼间距、侧齿间距、大螯不动指长、大螯宽、步足 长节长、体高、体重等26 个指标, 借助逐步线性回归、相关分析和通径分析等方法, 分析形态指标 与体重的关系。结果表明, 除第Ⅳ侧齿间距(A8)外, 实验所测形态指标与体重的相关系数均达到了显 著水平(P<0.05); 采用逐步线性回归的方法建立了多元回归方程Y=-273.841+10.4X1+2.867X2, 其中 Y 为体重(g), X1 为右大螯宽(mm), X2 为第Ⅱ侧齿间距(mm), 定量分析了形态指标对体重的影响结果。 相似文献
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描述了采自东海陆架沉积物中自由生活线虫Hopperia和Nemanema属的两个新种。新种大化感器霍帕线虫主要特征是螺旋形化感器5圈，较大；弓形交接刺近端宽大具有中肋，延伸至三分之一处；引带具有弯曲的引带突；6个乳突状的肛前辅器；锥柱状尾具有膨大的末端和尾端刚毛。新种小线虫的主要特征是身体大小是属内最小的；具有较大的椭圆形化感器；尾锥状；交接刺细，具有腹面翼膜，近端弯钩状；引带环形；1个肛前辅器乳突状，其上着生3条刚毛。更新完善了Hopperia属17个种的二岐检索表。 相似文献
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Craig B. Kensler 《新西兰海洋与淡水研究杂志》2013,47(2):143-155
Fecundity in Jasus verreauxi (H. Milne Edwards, 1851) has been studied by a detailed investigation of (a) the total weight of eggs carried by female specimens, (b) the average number of eggs per 1 g sample, and (c) the total number of eggs carried by females. In mid October 1966, 217 females “in berry” (that is, carrying external eggs) were examined and measured at Spirits Bay, New Zealand. The fecundity study is based on the results obtained from 21 selected specimens, with carapace lengths from 15.5 cm to 23.5 cm. A direct relation was found between the total weight of eggs carried and increase in carapace length. The total weight of eggs carried varied from about 51 g to 238 g for carapace lengths of 15.5 cm to 23.5 cm. No correlation was shown between the average number of eggs per 1 g sample and increase in carapace length. Considerable variation was noted in the number of eggs per 1 g sample, which ranged from a low count of 6,453 eggs to a high count of 8,341 eggs. The total number of eggs carried by female J. verreauxi was found to be related to an increase in carapace length. Furthermore, increase in fecundity per relative carapace length increase was noted to be greater in smaller specimens than in larger specimens. The total number of eggs carried ranged from about 385,000 for a carapace length of 15.5 cm to 1,940,000 for a carapace length of 23.5 cm. Fecundity, as measured by the total weight of eggs carried and the total number of eggs produced, was found to be much higher in J. verreauxi than in several Jasus species previously studied by other workers. 相似文献
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Epizoic diatoms on marine copepods are common in nature and may have a special ecological relationship with their hosts.However,this special ecological group is not well known,and it has only rarely been studied in the China seas.To address this knowledge gap,the species diversity and classification of epizoic diatoms on planktonic copepods were studied with samples collected from the East China Sea.In the present study,a marine araphid diatom genus Protoraphis and its type species,Pr.hustedtiana,were observed and identified by light and electron microscopy,thus representing the first record of this genus and its type species in China.This genus is characterized by a median sternum strongly bent to opposite sides and terminate in two transapical grooves at the valve ends.Protoraphis hustedtiana was found to be epizoic on the posterior body appendages and segments of the marine calanoid copepod Candacia bradyi.An internal view shows a complex,ear-shaped process that is close to the apical slit field.The ecological habitats and geographical distributions of Protoraphis were also discussed,and,together with complementary morphological studies,our results have increased the number of records for marine epizoic diatoms to three genera with three species in China,including Pseudohimantidium and Pseudofalcula. 相似文献
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Ruan Peihua 《海洋学报(英文版)》1990,9(1):119-134
-This paper deals with the recent ostracods and their distribution in littora! zones. The ostracods studied in this paper are all from the coastal zones of Gaode and Weizhou Island, Zhuang Autonomous Region of Guangxi. The present study shows that the richness and diversity of the ostracods from Gaode area are rather lower as compared with those from Weizhou Island, where individual numbers increase constantly from supralittoral to sublittoral zones. The ostracod associations of Weizhou Island are similar to those reported from the east coast of the Weizhou Island, and most of them are littoral and benthic forms of the order Podocopida and only a few of them are members of the order Myodocopoda (e. g. Ruti-derma, Cylindroleberis and Polycope). In this paper, the distributive character of the ostracods in the studied areas is analysed and discussed synthetically on the ground of their ecology, which will provide new information for the study of ecologic habitats, biogeographic provinciality and the Cenoz 相似文献
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Graham D. Fenwick 《新西兰海洋与淡水研究杂志》2013,47(3):471-478
Mesoproboloid.es excavata n. sp. is described and illustrated from material collected at Kaikoura, New Zealand. It differs most conspicuously from the other three known species of the genus in the posterodistally excavate coxa 4, the stout, blunt lobe distally on article 1 of antenna 1, the crenulate ventral margins of coxae 2–4, and the castellate posterior margin of article 2 of pereopod 5. The structure and distribution of minute organs, probably sensory receptors, densely distributed over much, of the integument was examined by scanning electron microscopy. The genus Mesoproboloides is now seen to be cold temperate‐subantarctic in occurrence. 相似文献
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Biomarker responses in Macoma nasuta (Bivalvia) exposed to sediments from northern San Francisco Bay
Ingeborg Werner Swee J. Teh Seema Datta XiaoQiao Lu Thomas M. Young 《Marine environmental research》2004,58(2-5):299
Our study investigates biomarker responses and survival of Macoma nasuta exposed to sediments collected from six locations in northern San Francisco Bay. Biomarkers analyzed were stress proteins (hsp70) in gill, mantle and digestive gland, lysosomal membrane damage and histopathologic lesions. Sediments and clam tissues were analyzed for a comprehensive suite of heavy metals and trace organic pollutants. Sediment grain size and organic carbon content were determined. Clams accumulated metals, polyaromatic hydrocarbons (PAHs) and organochlorine pesticides (aldrin and p,p′-DDT and its metabolites p,p′-DDD and p,p′-DDE). Pearson and Spearman correlation analysis revealed that mortality, hsp70 in gill and histopathologic lesion scores in gonads, and lysosomal membrane damage were significantly correlated with tissue concentrations of DDT and/or its metabolites. Tissue concentrations of metals, in particular nickel, chromium, and copper, were associated with macrophage aggregates in digestive gland and germ cell necrosis. Cadmium was linked to mortality and lysosomal membrane damage. 相似文献