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1.
Female lifespan and reproduction, in terms of numberof larvae produced, of the soil-dwelling predatorymite Lasioseius fimetorum Karg (Acari:Podocinidae) fed on mould mites (Tyrophagusputrescentiae [Schrank] [Acarina: Acaridae]) wereinvestigated by laboratory experiments at 20 °C,as were the mite's consumption rates of various prey.After a preoviposition period of 10.7 days, L.fimetorum produced progeny at a daily rate of 0.7.The oviposition period lasted 23.6 days and a total of19.4 progeny were produced per female. Females livedfor 38.6 days. Eggs of the Collembola Isotomurusspp. (Collembola: Isotomidae) were consumed in thelargest amount by L. fimetorum followed by mouldmite nymphs, larvae and pupae of thrips (Frankliniella occidentalis [Pergande] [Thysanoptera:Thripidae]), eggs of the Collembola Micrisotomaspp. (Collembola: Isotomidae), Isotomurus spp.nymphs and sciarid larvae (Bradysia pauperaTuomikoski and B. tritici (Coquillet) [Diptera:Sciaridae]). Immature drain flies (Psychoda spp.[Diptera: Psychodidae]) were not consumed by L.fimetorum. The suitability of L. fimetorum forbiological control of glasshouse pests withsoil-dwelling stages is discussed in comparison withanother predatory mite Hypoaspis miles Berlese(Acarina: Hypoaspididae).  相似文献   
2.
不同时期北部湾日本带鱼营养生态位差异   总被引:1,自引:0,他引:1  
基于2008—2009年和2018年对北部湾日本带鱼的采样,通过测定碳氮稳定同位素,计算其营养级、营养生态位等指标,对比分析10年前后日本带鱼营养生态位的差异,探究其生态适应能力的变动。结果表明: 2个时期北部湾日本带鱼碳稳定同位素(δ13C)值差异明显,2018年δ13C值范围变窄,平均值变小,推测日本带鱼食物来源由偏中上层向偏中下层水域转变;氮稳定同位素(δ15N)值的范围和平均值基本保持不变,营养级范围和平均值(3.38和3.43)变化不明显,说明近10年来北部湾日本带鱼在生态系统中的营养层次比较稳定。日本带鱼δ13C值与肛长相关性不显著,δ15N则为极显著正相关性。在营养生态位方面,2018年的生态位指标均出现不同程度的下降,下降幅度的范围为1.1%~32.1%;生态位总面积和核心生态位面积分别由20.20和4.68缩小至14.20和3.18,说明北部湾日本带鱼的营养生态位发生了显著变化,对资源利用能力和环境适应能力下降。推测,10年来北部湾日本带鱼的营养级变化不明显,但由于食物来源发生变化,营养来源多样性下降,营养生态位变小。  相似文献   
3.
记述毛绥螨属Lasioseius Berlese,1916一新种,拟混毛绥螨Laioseius paraconfusus sp.nov.。标本采处青海省湟中县总寨乡草堆上的表层土壤。  相似文献   
4.
裂胸螨科4新种和中国2新纪录属:蜱螨亚纲:革螨股   总被引:3,自引:1,他引:2  
记述裂胸螨科4新种:陈氏毛绥螨Lasioseius chenpengi sp.nov.,杵状肛厉螨Proctolaelaps pis-tilli sp.nov.,疏毛北绥螨Arctoseius oligotrichus sp.nov.和巨肛伊(虫穴)螨中Iphidozercon magnanalis sp.nov.。其中北绥螨属Arctoseius Thor,1930和伊(虫穴)螨属Iphidozercon Berlese,1903为中国首次纪录。  相似文献   
5.
采用实时定量PCR技术,以18SrRNA为内标基因,检测日本囊对虾Cathepsin B基因在mRNA水平不同卵巢发育时期的表达。结果显示,Cathepsin B在卵黄合成前期表达最高,内源性卵黄合成期和外源性卵黄合成期表达水平基本一致,而在成熟期表达水平急剧下降。其中卵黄合成前期与其它3期相比具有显著性差异(P0.05),内源性卵黄合成期和外源性卵黄合成期Cathepsin B不具有显著性差异(P0.05),而成熟期与前边三期相比具有显著性差异(P0.05)。推测Cathepsin B可能在日本囊对虾卵巢发育中发挥了作用。  相似文献   
6.
记述毛绥螨属2新种:小板毛绥螨Lasioseius plateculus sp.nov.和黄河毛绥螨Lasioseius huangheensis sp.nov..同时对王氏毛绥螨Lasioseius wangi Ma,1988进行再描述,并对廖氏毛绥螨 Lasioseius liaohaorongae Ma,1996进行更正.  相似文献   
7.
本文记述毛绥螨属一新种,三叉毛绥螨Lasioseiustrifurcipilussp.nov.和一新纪录种,肛毛绥螨LasioseiusanalisEvans,1958,它们分别采自贵州的黑线姬鼠和云南的大绒鼠体上,后种的雄螨尚属首次发现。对我国已知的10种毛绥螨编制了检索表。  相似文献   
8.
To find suitable candidates for biological control of the bulb mite, Rhizoglyphus robini Claparède (Acari: Astigmata) on lilies, exploration was undertaken in areas where the bulb mite is an established pest (The Netherlands, Taiwan and Japan). Among the predators, found in association with R. robini in the field and under storage conditions, mesostigmatic mites predominate. The most abundant species were Hypoaspis aculeifer (Canestrini), Lasioseius bispinosus Evans and Parasitus fimetorum (Berlese). These predators appeared to feed and reproduce on a diet of exclusively R. robini and they were able to control the bulb mite in small-scale population experiments initiated with a 1:20 predator-prey ratio. Under laboratory conditions corresponding to lily bulb propagation (lily scales mixed with vermiculite and stored at 23°C and >90% RH) the laelapid mite, H. aculeifer, was the most effective predator; the ascid predator, L. bispinosus, was much less effective, but being relatively small and being successful in attacking the juvenile stages of the bulb mite it may be better able to search for bulb mites hidden inside the lily bulb. The parasitid predator, P. fimetorum, failed to control the bulb mite when vermiculite was used as a medium, but turned out to suppress this prey when peat was used instead. Various strains of H. aculeifer or closely related species were compared with respect to their impact and performance on bulb mites as prey: two Dutch strains, one obtained from Breezand and the other from 'tZand, a Taiwanese strain, a German strain that in contrast to the previously mentioned strains was not collected from lily bulbs, but from agricultural areas near Bremen and, in addition, a Canadian strain of a related species (Hypoaspis miles Berlese), known to control sciarid fly larvae. These comparative experiments showed that H. miles died out without noticeable impact on the bulb mite population whereas all strains of H. aculeifer were able to suppress the bulb mites to very low numbers. However, the numerical responses of the H. aculeifer strains differed in that those collected in association with the pest (Breezand > Taiwan > 'tZand) were superior to the strain from Bremen. These results do not provide support to the Hokkanen and Pimentel hypothesis, which states that predators forming an evolutionary new association with the pest are often more effective in biological control.  相似文献   
9.
10.
记述裂胸螨科Aceosejidae毛绥螨属Lasioseius Berlese,1916一新种,多毛毛绥螨Lasioseius multisetus sp.nov..标本采自宁夏回族自治区银川市南郊天牛洞道,保存于军事医学科学院微生物流行病研究所医学昆虫标本馆.文内测量单位均为μm.  相似文献   
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