970 resultados para Insect sounds.


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"The subjoined Syllabary is 'mutatis mutandis' identical with the 'Tabelle für die laute des chinesischen im mandarin-dialecte' submitted by me to the Far-Eastern section of the XIII International congress of Orientalists held at Hamburg in September, 1902." ("Published in the Transactions of the Congress and reprinted in Prof. H. Cordier's report, 'Les etudes chinoises,' 1899-1902, 'Tʼoung pao,' 1903, p. 38-45, and 'Beiträge zur kenntniss des Orients.' vol. 1, München, 1903.")

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Publication 3896.

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Title Varies: Lakes Other Than the Great Lakes, Bays, and Sounds; General Rules and Regulations Prescribed by the Board of Supervising Inspectors as Amended at Board Meeting

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Mode of access: Internet.

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Some issues have supplement: Cooperative economic insect report. Special report.

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Mode of access: Internet.

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Polydnaviruses (PDVs) are endogenous particles that are used by some endoparasitic hymenoptera to disrupt host immunity and development. Recent analyses of encapsidated PDV genes have increased the number of known PDV gene families, which are often closely related to insect genes. Several PDV proteins inactivate host haemocytes by damaging their actin cytoskeleton. These proteins share no significant sequence homology and occur in polyphyletic PDV genera, possibly indicating that convergent evolution has produced functionally similar immune-suppressive molecules causing a haemocyte phenotype characterised by damaged cytoskeleton and inactivation. These phenomena provide further insights into the immune-suppressive activity of PDVs and raise interesting questions about PDV evolution, a topic that has puzzled researchers ever since the discovery of PDVs.

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Biological control is the purposeful introduction of parasites, predators, and pathogens to reduce or suppress pest populations. Wolbachia are inherited bacteria of arthropods that have recently attracted attention for their potential as new biocontrol agents. Wolbachia manipulate host reproduction by using several strategies, one of which is cytoplasmic incompatibility (CI) [Stouthamer, R., Breeuwer, J. A. J. & Hurst, G. D. D. (1999) Annu. Rev. Microbiol. 53,71-102]. We established Wolbachia-infected lines of the medfly Ceratitis capitata using the infected cherry fruit fly Rhagoletis cerasi as donor. Wolbachia induced complete CI in the novel host. Laboratory cage populations were completely suppressed by single releases of infected males, suggesting that Wolbachia-induced CI could be used as a novel environmentally friendly tool for the control of medfly populations. The results also encourage the introduction of Wolbachia into pest and vector species of economic and hygenic relevance to suppress or modify natural populations.

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Trichogramma species are mass-produced for biological control using host eggs. Artificial diets have been developed to reduce production costs, however, most include insect haemolymph as a major component, which still results in a significant expense. Medium conditioned with insect cell lines has produced some success as a haemolymph replacement in artificial diets for several parasitoid wasp species. Trichogramma australicum Girault (Hymenoptera: Trichogrammatidae) was the first species to develop successfully to the adult stage on diets containing concentrated HeliothiS zea (Boddie) (Lepidoptera: Noctuidae) cells. Tricho-gramma pretiosum Riley (Hymenoptera: Trichogrammatidae) was subsequently grown to the adult stage on a similar cell line diet. This success encouraged a systematic investigation into the use of insect cell lines in Trichogramma artificial diets. We compared the effect of diets containing insect cells with diets containing conditioned cell line media. Diets containing insect cells produced significantly more pupae than diets containing conditioned medium and, although not significant, produced a higher number of adults. Second, we compared the effect of diets containing cell lines established from ovary-associated tissue of H. zea and embryo tissue of Aedes albopictus (Skuse) (Diptera: Culicidae) on T pretiosum development. Trichogramma pretiosum development was not significantly different on diets containing cells from the two origins and tissue types. Third, the effect of cell storage on T pretiosum development was observed. HeliothiS zea cells in medium were stored at 4 degrees C and room temperature (22 degrees C for one, two, four and seven days before addition to artificial diets. Cell viability was calculated for these storage treatments. HeliothiS zea cells could be stored at 4 degrees C for up to seven days with no detrimental effect on T pretiosum development. Tricho-gramma pretiosum development did not depend on cell viability. The use of insect cell lines as a haemolymph replacement has the potential to significantly reduce production costs and simplify Trichogramma artificial diets with the eventual aim of replacing host production in mass rearing facilities. (c) 2005 Elsevier Inc. All rights reserved.