| the hyperglycemic neuropeptide of the terrestrial isopod, porcellio dilatatus. ii. immunocytochemical demonstration in neurosecretory structures of the nervous system. | by use of an rabbit antiserum raised against the crustacean hyperglycemic hormone (chh) of the shore crab, carcinus maenas, chh-producing perikarya were detected in the brain of the isopod, porcellio dilatatus, by the double-antibody immunofluorescence technique. the course of the secretory axons to the neurohemal organ, the sinus gland, could be traced. the sinus gland also exhibited strong fluorescence. the reaction was very specific, no other structures gave appreciable immunofluorescence. th ... | 1984 | 6383952 |
| do stable isotopes reflect the food web development in regenerating ecosystems? | we evaluated the use of delta15n- and delta13c-values to monitor the development of food web complexity and biodiversity in a regenerating ecosystem. therefore a model food chain was established feeding cultivated woodlice (porcellio dilatatus) on a cellulolytic fungus (chaetomium globosum) grown on cellulose paper. two diets of different quality (c:n ratios of 54 vs. 200) with different delta15n- (1.3% vs. 3.1%) but identical delta13c-values caused low and high dietary stress in animals of trea ... | 2000 | 11501706 |
| masculinization of female isopods (crustacea) correlated with non-mendelian inheritance of cytoplasmic viruses. | when in genetic females external male characters differentiate, the phenomenon is called "male pseudohermaphroditism." this male differentiation occurs in terrestrial isopods (crustacea, suborder oniscoidea) and sometimes involves only some epithelial areas (gynandromorphous mosaics). it is not induced by male hormones or by abnormal ovary function. this intersexuality is transmitted maternally (by the intersex females) or paternally (by the brothers of intersex females) to between 30% and 60% o ... | 1991 | 11607243 |
| accurate determination of cd, cr, cu and ni in woodlice and their skins--is moulting a means of detoxification? | cd, cr, cu and ni were determined in two different species of woodlice: porcellio scaber and porcellio dilatatus. both p. scaber and p. dilatatus were cultivated under standardized conditions in a climatic chamber. moreover, skins of the cultivated animals were collected and analysed separately to examine whether moulting is a way of detoxification from these elements. after drying and grinding both animal and skin samples, they were pooled to obtain enough sample material for each species. the ... | 2005 | 15626381 |
| does subcellular distribution in plants dictate the trophic bioavailability of cadmium to porcellio dilatatus (crustacea, isopoda)? | the present study examined how subcellular partitioning of cd in plants with different strategies to store and detoxify cd may affect trophic transfer of cd to the isopod porcellio dilatatus. the plant species used were lactuca sativa, a horticultural metal accumulator species; thlaspi caerulescens, a herbaceous hyperaccumulator species; and the nonaccumulator, t. arvense. taking into account that differences in subcellular distribution of cd in plants might have an important role in the bioavai ... | 2008 | 18624580 |
| the mutualistic side of wolbachia-isopod interactions: wolbachia mediated protection against pathogenic intracellular bacteria. | wolbachia is a vertically transmitted endosymbiont whose radiative success is mainly related to various host reproductive manipulations that led to consider this symbiont as a conflictual reproductive parasite. however, lately, some wolbachia have been shown to act as beneficial symbionts by protecting hosts against a broad range of parasites. still, this protection has been mostly demonstrated in artificial wolbachia-host associations between partners that did not co-evolved together. here, we ... | 2015 | 26733946 |
| cannibalism and predation as paths for horizontal passage of wolbachia between terrestrial isopods. | the alpha-proteobacteria wolbachia are the most widespread endosymbionts in arthropods and nematodes. mainly maternally inherited, these so-called sex parasites have selected several strategies that increase their vertical dispersion in host populations. however, the lack of congruence between the wolbachia and their host phylogenies suggests frequent horizontal transfers. one way that could be used for horizontal wolbachia transfers between individuals is predation. the aim of this study was to ... | 2013 | 23593179 |
| effects of essential oils from eucalyptus globulus leaves on soil organisms involved in leaf degradation. | the replacement of native portuguese forests by eucalyptus globulus is often associated with deleterious effects on terrestrial and aquatic communities. several studies have suggested that such a phenomenon is linked with the leaf essential oils released into the environment during the eucalyptus leaf degradation process. however, to date, the way these compounds affect leaf degradation in terrestrial systems i.e. by direct toxic effects to soil invertebrates or indirectly by affecting food of s ... | 2013 | 23577212 |
| strength of the pathogenicity caused by feminizing wolbachia after transfer in a new host: strain or dose effect? | the alphaproteobacteria wolbachia pipientis are among the most common and widespread symbionts in the animal world. their vertical transmission mode is predicted to favour genotypes with low virulence. on the contrary, horizontal transfers of wolbachia from one host to another have been shown to possibly increase the symbiont virulence. this situation has been previously described when two feminizing wolbachia strains, wvulc and wvulm, from the ovaries of the woodlouse armadillidium vulgare were ... | 2014 | 24345405 |
| horizontal transfers of feminizing versus non-feminizing wolbachia strains: from harmless passengers to pathogens. | the endosymbiont wolbachia pipientis infects various hosts in which it navigates vertically from mothers to offspring. however, horizontal transfers of wolbachia can occur between hosts. the virulence of the horizontally acquired wolbachia can change in the new host as it has been illustrated by the case of the feminizing strain wvulc from the woodlouse armadillidium vulgare that turns to a pathogen when introduced into porcellio dilatatus dilatatus. in the present study, we aim to show whether ... | 2013 | 23802876 |
| isolation, characterization and pcr multiplexing of microsatellite loci for two sub-species of terrestrial isopod porcellio dilatatus (crustacea, oniscidea). | several microsatellite markers have already been developed for different terrestrial isopod species such as armadillidium vulgare, a. nasatum and porcellionides pruinosus. in all these species, the endosymbiont wolbachia has a feminizing effect that generates a female bias in sex ratio and reduces the number of reproductive males. thus this can potentially decrease the genetic diversity of host populations. however, in some other isopod species, wolbachia induces cytoplasmic incompatibility (ci) ... | 2016 | 26943350 |
| respiratory physiology of the oniscidea: aerobic capacity and the significance of pleopodal lungs. | the radiation of the terrestrial isopods (sub-order oniscidea) has been accompanied by evolution of pleopodal lungs in the sections tylida and crinocheta. to understand the significance of such lungs for aerobic respiration, comparative studies were conducted using 6 species. ligia occidentalis, lacking lungs, behaved as a metabolic conformer in reduced po(2), and showed decreased v(.-)o(2) in low humidity and following dehydration. in species possessing lungs, metabolism was insensitive to dehy ... | 2006 | 16875858 |
| [intersexuality and monogeny in terrestrial isopod crustacea: induction of thelygeny in armadillidium vulgare; factors controlling external male pseudohermaphroditism in porcellio dilatatus]. | | 2016 | 5455245 |
| immunochemical and immunocytochemical studies of the crustacean vitellogenesis-inhibiting hormone (vih). | immunochemical investigations, using dot immunobinding assay (dia) and enzyme-linked immunosorbent assay (elisa), and immunocytochemical studies reveal the following new information about crustacean vitellogenesis-inhibiting hormone (vih): (1) the structure of vih is sufficiently different from that of the other sinus gland neuropeptides to allow a selective recognition of vih by polyclonal antibodies. (2) from immunochemical criteria, vih does not seem strictly species specific. the antisera ra ... | 1987 | 3666410 |
| cadmium assimilation in the terrestrial isopod, porcellio dilatatus--is trophic transfer important? | terrestrial isopods have become important tools for the ecotoxicological assessment of metal-contaminated soils. their value as an invertebrate model is partly because of their extraordinary capacity to bioaccumulate toxic metals from the environment. replication of this accumulation process in the laboratory has in the past relied on the amendment of organic food substrates through the addition of inorganic metal salts. however, the bioavailability of the metals when presented through doping re ... | 2006 | 17055036 |