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8 results for “Marbled crayfish”
Temperature affects predation of schistosome-competent snails by a novel invader, the marbled crayfish Procambarus virginalis
<p><span>The human burden of environmentally transmitted infectious diseases can depend strongly on ecological factors, including the presence or absence of natural enemies. The marbled crayfish (<em>Procambarus</em> <em>virginalis</em>) is a novel invasive species that can tolerate a wide range of ecological conditions and colonize diverse habitats. Marbled crayfish first appeared in Madagascar in 2005 and quickly spread across the country, overlapping with the distribution of freshwater snails that serve as the intermediate host of schistosomiasis–a parasitic disease of poverty with human prevalence ranging up to 94% in Madagascar. It has been hypothesized that the marbled crayfish may serve as a predator of schistosome-competent snails in areas where native predators cannot and yet no systematic study to date has been conducted to estimate its predation rate on snails. Here, we experimentally assessed marbled crayfish consumption of uninfected and infected schistosome-competent snails (<em>Biomphalaria</em> <em>glabrata</em> and <em>Bulinus</em> <em>truncatus</em>) across a range of temperatures, reflective of the habitat range of the marbled crayfish in Madagascar. We found that the relationship between crayfish consumption and temperature is unimodal with a peak at ~27.5°C. Per-capita consumption increased with body size and was not affected either by snail species or their infectious status. We detected a possible satiation effect, i.e., a small but significant reduction in per-capita consumption rate over the 72-hour duration of the predation experiment. Our results suggest that ecological parameters, such as temperature and crayfish weight, influence rates of consumption and, in turn, the potential impact of the marbled crayfish invasion on snail host populations. </span></p>
Temperature affects predation of schistosome-competent snails by a novel invader, the marbled crayfish Procambarus virginalis
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Fig. 3 in Effect Of Zinc And Cadmium Ions On Histostructure Of Antennal Glands Of Marbled Crayfish Procambarus Fallax (Hagen, 1870) F. Virginalis (Decapoda)
Fig. 3. Antennal gland of marbled crayfish under influence of zink (40х).
Fig. 2 in Effect Of Zinc And Cadmium Ions On Histostructure Of Antennal Glands Of Marbled Crayfish Procambarus Fallax (Hagen, 1870) F. Virginalis (Decapoda)
Fig. 2. Histology of antennal gland of marbled crayfish control (40x).
Figure 1 in Estimating the young evolutionary age of marbled crayfish from museum samples
Figure 1. Geographical origin and sex distribution of Procambarus fallax samples in the USNM collection. Figures in circles indicate number of lots collected in the respective county. Both sexes were found in 194 lots in 39 counties. Pure female samples with>3 specimens were found in 7 lots in 7 counties and pure male samples>3 specimens were found in 2 lots in 1 county. The circles marked by H and V indicate counties not represented in the USNM collection. They were collected by Hendrix et al. (2000) and Van der Heiden and Dorn (2017), respectively. These samples included both sexes.
FIGURE 1 in Annotated bibliography of the parthenogenetic marbled crayfish Procambarus virginalis, a new research model, potent invader and popular pet
FIGURE 1. Yearly number of publications on marbled crayfish in the period 1998-2018 (without conference abstracts). The year 2018 includes published publications (shaded) and publications in press (unshaded) until March 31.
Marbled crayfish genes, Stein et al (2022)
<p>Sequence archive for newly identified genes in marbled crayfish discussed in the research publication <a href="https://www.frontiersin.org/articles/10.3389/fphys.2022.947598/abstract">Frontiers | Combining old and new tricks: the study of genes, neurons, and behavior in crayfish | Physiology (frontiersin.org)</a>. </p> <p>File "MC genes_newer.fasta" is a FASTA file containing the mRNA sequence for genes putatively involved in eye development and gap junction formation. File "Supplementary" contains the same gene sequences with additional information about genome sequencing and assembly methods. </p>
Supplementary material 1 from: Dobrović A, Geček S, Klanjšček T, Haberle I, Dragičević P, Pavić D, Petelinec A, Boštjančić LL, Bonassin L, Theissinger K, Hudina S (2022) Recurring infection by crayfish plague pathogen only marginally affects survival and growth of marbled crayfish. NeoBiota 77: 155-177. https://doi.org/10.3897/neobiota.77.87474
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OpenNeuro
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