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金道超 《动物学研究》1992,13(2):109-115
作者在整理采自贵阳、长沙、武汉的马氏雄尾螨Arrenurus(Micruracarus)madarasziDaday标本中,发现了两个近似新种:拟马氏雄尾螨Arrenurus(Micruracarus)madarasziatus sp.nov.和华中雄尾螨Arrenurus(Micruracarus)huazhongensis sp.nov.本文记述了此三近以种,并作了特征鉴别。  相似文献
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蚌螨属1新种记述(蜱螨亚纲:蚌螨科)   总被引:1,自引:1,他引:0  
报道蚌螨属Unionicola一新种。  相似文献
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贵州软滑水螨属二新种记述:(蜱螨亚纲:软滑水螨科)   总被引:1,自引:0,他引:1  
本文描述软滑水螨科Pionidae二新种。新种多盘软滑水螨Pipma polyacetabula sp.nov.以其两性具极多殖吸盘(雄螨68—72个,雌螨45—50个)为其显著特征。新种宽殖软滑水螨P.platyura sp.nov.两性殖吸盘数目较多(雄螨35—42个,雌螨约48个),两性殖吸盘板宽近与Ⅳ足基节板等宽。两新种间以雄性殖吸盘数差异显著;两新种亦以殖吸盘数与本属已知种有显著差异而易于鉴别。  相似文献
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中国蚌螨属水螨一新种记述(蜱螨亚纲,蚌螨科)   总被引:1,自引:0,他引:1  
记述了从我国江西省淡水蚌中采到的蚌螨科Unioncolidae水螨1新种,簇刺蚌螨U.(Anodontinatax)penicillatus sp.nov.,模式标本保存于南昌大学生物科学工程系.簇刺蚌螨,新种Unionicola(Anodontinatax)penicillatus sp.nov.(图1~11)正模♂,副模1♀,江西鄱阳湖,1998-11-11,文春根采自背角无齿蚌A.woodiana woodiana(Lea).鉴别特征新种近似于中间蚌螨U.(Anodontinatax)intermedia(Koenike,1882),但通过以下特征区别后者:雄螨具有背小板,雄螨Ⅳ-L-4-5的密刺毛数量为8~10和22~24(后者为18~20和17~19),射精复合体的形状和须肢的分叉腹小爪.词源:拉丁词"penicillatus"意思为"一簇毛的",指新种因雄螨Ⅳ-L-4-5有一簇刺毛而命名.  相似文献
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江西蚌螨属七种记述(蜱螨亚纲:蚌螨科)   总被引:1,自引:1,他引:0  
报道作者近几年采自江西的蚌螨属7种水螨,包括一新种:螯爪蚌螨,中国三新记录种:弯弓蚌螨,刺蚌螨,今村蚌螨,1978,三已知种;Y纹蚌螨,台湾蚌螨,厚蚌螨,并对已知种作了必要描述。  相似文献
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Temporal and spatial patterns of water mites in Lake Maarsseveen I   总被引:1,自引:0,他引:1  
The paper analyses the distribution and seasonal changes in numbers of the water mite fauna of Lake Maarsseveen I. Water mites were collected from 1977 until 1986 by dipnet, underwater light trap, hydraulic lift sampler and by frame net. Fifty-two species belonging to the Hydrachnellae and one to the Halacaridae were sampled. The faunal picture obtained is characteristic of mesotrophic to eutrophic lakes.Arrenurus nobilis. Piona paucipora andP. imminuta can be characterised as lake species. The dominant species in the littoral sand flat areHygrobates nigromaculatus andH. trigonicus, at a depth of 0.5–1 m, andMideopsis orbicularis at depths of 2–7 m.Limnesia maculata is also very common on depths between 2 and 7 m. In early summer, however, they prefer shallow water up to 1 m depth. Some species likeHygrobates nigromaculatus andH. trigonicus were not captured by the underwater light trap. The hydraulic lift sampler gave underestimations of the densisty of certain speciese.g. Hygrobates spp. andLimnesia maculata. Unionicola spp. even can avoid this sampler. Sampling by frame net gave the most realistic data. The highest number of water mites was observed in the littoral sand flat, generally up to 1000 ind. m−2. The genusHygrobates was represented with an average of 800 adult ind. m−2 throughout the year, and appeared to be the main invertebrate predator in this habitat.  相似文献
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Summary Piona exigua Viets is a predaceous freshwater mite that can potentially affect the population densities of its cladoceran prey. As part of a study of the effect of Piona exigua on its prey populations we measured the effects of water temperature and prey density on the lifespan, age at first reproduction and per capita egg production of adult female mites. Mites were raised in the laboratory at five prey (Ceriodaphnia, Daphnia) densities (5, 15, 30, 60, 120/l) at 15° C and at four temperatures (10, 15, 18, 22° C) at c. 60 prey/l. In response to increased food level, mites increased the number of eggs laid to reach a maximum at 60 prey/l, the rate at which they were laid increased and the pre-reproductive period was shorter. Low temperatures prolonged the pre-reproductive period. At temperatures above 10° C, food level and temperature had more influence on the timing of reproductive events (growth rate, oviposition rate, age at first reproduction) than on the size of females at first reproduction. When temperatures exceed 10° C and food levels exceed 5 prey/l the major scope for reproductive plasticity in Piona lies in the timing and duration of egg production.  相似文献
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Insect emergence was studied with floating box traps in the littoral of Lake Mindelsee from July 1st until September 30th, 1984. The material was collected every 48 h. Out of the total catch of 6897 specimens per m2, 75.1 % belonged to the Chironomidae, 4,9% to the Chaoboridae, 15,4% to the Ephemeroptera and 3,2% to the Trichoptera. Endochironomus sp., Lauterborniella agrayloides, Polypedilum pullum (Chironomidae) and Oocetis testacea (Trichoptera) are reported for the first time from Lake Mindelsee. The seasonal course of the total emergence showed two distinct peaks: one at the end of July, the other at the beginning of September. Diurnal emergence was studied on two occasions, in July and in August. Most of the insects emerged during dusk and dawn. Species composition and degree of water mite infection of the collected nematocerans were studied. Host range and specific attachment sites of the different water mite taxa could only be established on the genus or family-level, with the exception of the most common water mite species Hydrodroma despiciens. In addition to its main host Chaoborus flavicans, this mite species infested 16 chironomid species with Corynoneura sp., Cryptocladopelma viridula, Pseudochironomus prasinatus and Tanytarsus lactescens as new records. The larvae of Hydrodroma despiciens were attached almost exclusively to the thorax of the imagines. Chaoborus flavicans, and within the Chironomidae Procladius sp. of the subfamily Tanypodinae, showed the highest average mite load. Species of the subfamily Chironominae were also heavily infested (e.g. Microtendipes sp., infestation rate 76 % with a maximum mite load of 18). Within the representatives of the subfamily Orthocladiinae however, only low infestation rates occurred with maximum one larva per host. Finally, problems like the synchronization of the life-cycles of hosts and parasites and strategies of coexistence between the different water mite taxa parasitizing one host are discussed.  相似文献
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