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76 results for “Procambarus”
Long-Term Slough Crayfish (Procambarus fallax) Densities in the Florida Everglades from Throw Trap Sampling, Florida, USA, February 1996-December 2016
Densities of slough crayfish (Procambarus fallax) were collected throughout the Florida Everglades using 1-m2 throw-trapping samples from 1996–2016. Data were collected in four distinct regions within the Everglades (Shark River Slough, Taylor Slough, Water Conservation Area 3A and 3B) and during five seasonal periods each year. Each region consists of a series of sites, and each site consists of 3–5 sampling plots. The plot scale defines the unique sampling unit in the study, and 5–7 replicate throws were conducted at each plot. Corresponding hydrologic data were collected in conjunction with crayfish observations. These data describe antecedent average water depths, along with the duration of previous wet and dry conditions. Antecedent conditions were calculated by using both in situ measurements, as well as model output from the Everglades Depth Estimation Network (EDEN). Additional hydrologic data are provided in the LD_0 dataset, which describes daily depths measurements at sampling plots, as well as the length of antecedent complete drying events (LD_0). The length of antecedent dry conditions is assessed in R script FCE1267_01_LD_Depths, while the crayfish modeling code is described in FCE1267_02_Modeling_Code.
Effect of psychoactive substances on cardiac and locomotory activity-Procambarus virginalis-DATA
<p>This Effect of psychoactive substances on cardiac and locomotory activity<em>-Procambarus virginalis</em></p> <p>The associated dataset investigates the impact of environmentally relevant levels of psychoactive compounds on the early developmental stages of marbled crayfish (Procambarus virginalis). The compounds analyzed include sertraline, methamphetamine, and a mixture of citalopram, oxazepam, sertraline, tramadol, venlafaxine, and methamphetamine, each at a concentration of 1 μg L-1. The dataset assesses cardiac and locomotory activity on day four and day eight of exposure, respectively.</p> <p>it is a condition of the CENAKVA RI financing provider to record accesses to open data. Data can be requested at the following email: <strong>dubova@frov.jcu.cz</strong></p> <p>or visit the CENAKVA RI website:<br>https://www.frov.jcu.cz/en/faculty/faculty-parts/south-bohemian-research-centre-for-aquaculture-and-biodiversity-of-hydrocenoses-cenakva/large-research-infrastructure-cenakva</p>
Figure 5 in It's a Trap! An evaluation of different passive trap types to effectively catch and control the invasive red swamp crayfish (Procambarus clarkii) in streams of the Santa Monica Mountains
Figure 5. Mean crayfish counts by size (cm) class across twelve trap types with standard error bars.
Figure 2 in It's a Trap! An evaluation of different passive trap types to effectively catch and control the invasive red swamp crayfish (Procambarus clarkii) in streams of the Santa Monica Mountains
Figure 2. Six standard, base trap types used in this study; a = Steel silver Gee Minnow trap, b = Vinyl coated black Promar Minnow trap, c = Mountain Restoration Trust custom design pyramid trap, d = Collapsible red square mesh Promar 501 trap, e = Colapsible cylindrical black mesh Promar 503 trap, and f = Mountain Restoration Trust custom PVC tube/refuge traps. Specific modifications to these traps to create the 12 types tested are provided in Table 1.
Figure 1 in It's a Trap! An evaluation of different passive trap types to effectively catch and control the invasive red swamp crayfish (Procambarus clarkii) in streams of the Santa Monica Mountains
Figure 1. Placement of traps compared in study in Las Virgenes Creek within Malibu Creek State Park. Inset shows specific study location within a regional context. Section locations were selected based on their representativeness of habitat types occurring over the entire reach (i.e. amount of riffle, runs and pools being comparable) and presence of suitable habitat for trap placement and visual observance of crayfish, tadpoles and native chub.
Figure 7 in It's a Trap! An evaluation of different passive trap types to effectively catch and control the invasive red swamp crayfish (Procambarus clarkii) in streams of the Santa Monica Mountains
Figure 7. Mean catches by stream habitat type. Differences in mean catches between stream Pools vs. Runs was evaluated using Wilcoxon rank-sum tests. * P-value <0.05.
Figure 3 in It's a Trap! An evaluation of different passive trap types to effectively catch and control the invasive red swamp crayfish (Procambarus clarkii) in streams of the Santa Monica Mountains
Figure 3. Mean catch per trap type with standard errors. Letters indicate significantly different mean counts within groups.
Figure 6 in It's a Trap! An evaluation of different passive trap types to effectively catch and control the invasive red swamp crayfish (Procambarus clarkii) in streams of the Santa Monica Mountains
Figure 6. Mean chub counts by size class across twelve trap types with standard error bars. Size classes include small as ≤ 60mm, medium as 61–89 mm, and large as 89–150mm as described by O'Brien et al. (2011).
Figure 1 in The first records of Marmorkrebs [Procambarus fallax (Hagen, 1870) f. virginalis] (Crustacea, Decapoda, Cambaridae) in Ukraine
Figure 1. Procambarus fallax (Hagen, 1870) f. virginalis and its localities in Ukraine: 1 – old flooded quarry in Dnepropetrovsk City (48°30'19.15 N; 35°06'08.56" E); 2 – cascade of ornamental ponds (46°26'53.85 N; 30°45'12.54" E) in Odessa City.
Fig. 4. Epistylis semiciculus n in Morphological and molecular identification of epibiontic sessilid Epistylis semiciculus n. sp. (ciliophora, Peritrichia) from Procambarus clarkia (Crustacea, Decapoda) in China
Fig. 4. Epistylis semiciculus n. sp. drawing from vivo and stained specimens. A. Morphotype I of Epistylis semiciculus n. sp. in vivo. B, C. Morphotype II of Epistylis semiciculus n. sp. in vivo. D. Oral infraciliature Oral. E. Transverse striations. G, germinal kinety; H, haplokinety; P, polykinety; P1–3, infundibular polykineties 1–3. Scale bars: A = 20 μm; B = 400 μm; C = 20 μm.
Fig. 3 in Morphological and molecular identification of epibiontic sessilid Epistylis semiciculus n. sp. (ciliophora, Peritrichia) from Procambarus clarkia (Crustacea, Decapoda) in China
Fig. 3. Microphotographs of stained Epistylis semiciculus n. sp. with protargol stain (A–F) and silver nitrate (G–I). A. Pattern of infraciliature. B. Macronucleus with transverse orientation. C. Macronucleus with longitudinal orientation. D, E, F. Terminate of infundibular polykineties 1–3. G, H. Silver nitrate impregnated transverse striations, arrow shows the pores. I. Macronucleus after silver nitrate impregnated. ATB, aboral trochal band; G, germinal kinety; H, haplokinety; P, polykinety; P1–3, infundibular polykineties 1–3. Scale bars: A, B, C, H, I = 20 μm; D, E, F = 10 μm; G = 5 μm.
Fig. 2 in Morphological and molecular identification of epibiontic sessilid Epistylis semiciculus n. sp. (ciliophora, Peritrichia) from Procambarus clarkia (Crustacea, Decapoda) in China
Fig. 2. Telotrochs of morphotype II of Epistylis semiciculus n. sp. in vivo. A. Apical view of telotroch. B. Oral of telotroch (arrow). C. Oral infraciliature (arrow). D. Transverse striations on oral pellicle (arrow). E. Macronucleus and infraciliature. F. Macronucleus (arrow). ATB, aboral trochal band; CV, Contractile vacuole; Ma, macronucleus; P, polykinety. Scale bars = 10 μm.
Fig. 6 in Morphological and molecular identification of epibiontic sessilid Epistylis semiciculus n. sp. (ciliophora, Peritrichia) from Procambarus clarkia (Crustacea, Decapoda) in China
Fig. 6. Consensus tree constructed from both trees generated by phylogenetic analyses of nuclear ITS1-5.8S-ITS2 sequence. The sequences investigated in the present study are in bold. Numbers on branches indicate the posterior probability (BI) and bootstrap (ML) values, respectively. 1, morphotype I; 2 and 3, morphotype II; 4, Telotrochs of morphotype II.
Fig. 5 in Morphological and molecular identification of epibiontic sessilid Epistylis semiciculus n. sp. (ciliophora, Peritrichia) from Procambarus clarkia (Crustacea, Decapoda) in China
Fig. 5. Consensus tree constructed from both trees generated by phylogenetic analyses of nuclear SSU rDNA sequences. The sequences investigated in the present study are formatted in bold. Numbers at nodes of branches indicate the posterior probability (BI) and bootstrap (ML) values, respectively. 1 and 2, morphotype I; 3, morphotype II; 4, Telotrochs of morphotype II.
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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Data from: Limiting burrowing activity and overland dispersal of the invasive alien red swamp crayfish Procambarus clarkii by sophisticated design of watercourses
<p>Two datasets belonging to the paper "Limiting burrowing activity and overland dispersal of the invasive alien red swamp crayfish <i>Procambarus clarkii</i> by sophisticated design of watercourses" published in Ecological Engineering (https://doi.org/10.1016/j.ecoleng.2022.106787), are provided here. </p><p> </p><p>The first dataset "Burrow data from Limiting burrowing activity and overland dispersal P. clarkii.csv" contains data from an inventory of crayfish burrows in three watercourses in the municipality of Horssen (Province of Gelderland), the Netherlands. These data were collected during a lowering of the water level in these watercourses, which takes place annually in the winter period to prevent nuisance from excessively high phreatic groundwater in agricultural areas. The sites were located up to 5 km apart. On each bank, red swamp crayfish burrows with tunnel openings in banks below the shoreline were counted from the opposite bank of the watercourse using binoculars. This field survey was performed in March 2019 when the water level was lowered for the maintenance of the watercourses. The chance of overlooking burrows was very low as the vegetation cover was low in this period. Three sites with 'natural-like' banks (banks rehabilitated to a natural profile during rehabilitation projects, in the dataset referred to as 'natural' banks) were chosen in the area with a lowered water level and presence of red swamp crayfish. At site 1, 2 and 3, a total of 125, 46 and 18 bank transects respectively, each one 10 metres long, were surveyed. Banks were categorized as follows: (a) non-natural (steep, <i>viz</i>. > 40°, and barely vegetated; n = 77), (b) semi-natural (steep with some vegetation; n = 50), and (c) natural (gentle sloping, <i>viz</i>. < 25°, with a diverse, well-developed submerged and emergent vegetation; n = 62). See the paper for schematic cross-sections of three bank types.</p><p>The second dataset "Inclination experiment data from Limiting burrowing activity and overland dispersal P. clarkii.csv" contains data of an inclination experiment to relate frequencies of overland movement of the red swamp crayfish to several inclinations and substrate types. For this purpose, a wooden plate of 120 x 180 cm with a 10 cm thick layer of soil was used as a base on which three lanes of 40 cm wide and 180 cm long were constructed with one substrate type each: a) bare sandy soil, b), species-poor grassland with low (2-5 cm) vegetation and c) tall (40-50 cm) herbaceous-rich grassland. Inclinations applied for this experiment were 0°, 10°, 20° and 30°. Individuals were randomly selected for each treatment and placed in the middle of a lane and oriented perpendicular to the lane. After each trial, the crayfish was placed back in the water container and replaced by another crayfish. There was a minimum period of at least one hour between each trial for each crayfish. Each crayfish was used once for each substrate type and inclination test, and the treatment order was randomised for each animal. A crayfish was placed in the middle of the lane and could freely move around for a period of three minutes. Hereafter, by the change of its position on the lane after 3 minutes it was recorded whether an individual moved up (or left in case of 0°), down (or right in case of 0°), or did not move. In total, 273 trials were conducted. Trial numbers differ between treatments due to mortality of three animals during storage.</p><p> </p><p>Abstract</p><p> </p><p>Invasive alien crayfish species pose major ecological and hydrological risks globally. The red swamp crayfish (<i>Procambarus clarkii</i>) is one of the most widespread crayfish species worldwide. Its impacts arise from burrowing activities and lead to mobilization of soil nutrients, water safety risks by instability of dikes and erosion of banks. Increased sediment load demands additional dredging of drainage ditches and canals to ensure their water discharge capacity. Sustainable methods for limiting burrowing in banks and dispersal behaviour of crayfish were not yet available. Therefore, a field study was performed to determine whether the number of burrows and overland movement of crayfish were related to a particular bank type. Burrows were counted in three watercourses during a water-level decline. The number of burrows was significantly lower in natural banks than in non-natural and semi-natural banks. The construction of natural-like banks along watercourses may significantly reduce sediment load, erosion and the collapse of banks by burrowing activities of crayfish. An inclination experiment mimicking various types of terrestrial dispersal barriers elucidated that steepness, soil type and vegetation structure of small embankments near watercourses were significant factors for manipulating overland movement of crayfish. Crayfish were taken out of the water for this purpose and placed on small experimental embankments varying in slope and types of vegetation. The lowest frequencies of upward movement were recorded at inclinations of 20° and 30° on bare sandy soil and short and species-poor grassland substrates. This implies that crayfish crawling out of the water will return to the watercourse when encountering such a dispersal barrier. Therefore, a sophisticated design of embankments along watercourses can be a tool to reduce colonization risk of nearby located, hydrologically isolated water bodies with high nature values. </p>
Procambarus clarkii distribution data
<pre>World distribution data from Procambarus clarkii for species distribution modeling Data cleaning version through duplicate coordinates and spatial filtering</pre>
Figure 4 in It's a Trap! An evaluation of different passive trap types to effectively catch and control the invasive red swamp crayfish (Procambarus clarkii) in streams of the Santa Monica Mountains
Figure 4. Mean crayfish catch per trap by sex. Bars indicate standard error.
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).
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