Relevant bibliographies by topics / Crayfish

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'Crayfish'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 August 2024

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Journal articles on the topic "Crayfish"

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Gao, Jian, Cheng Yang, Zehui Zhang, Zhengwen Liu, and Erik Jeppesen. "Effects of co-occurrence of invading Procambarus clarkii and Pomacea canaliculata on Vallisneria denseserrulata-dominated clear-water ecosystems: a mesocosm approach." Knowledge & Management of Aquatic Ecosystems, no. 422 (2021): 29. http://dx.doi.org/10.1051/kmae/2021029.

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Single invaders often substantially alter ecosystems, but the potential impacts by multiple invaders remain understudied. The golden apple snail (Pomacea canaliculata) and the red swamp crayfish (Procambarus clarkii) are two widespread coinvaders. To test the effects of co-occurrence of the two species on a clear-water macrophyte state, we performed a 20-day experiment in 16 mesocosms (4 contained only two snails, 4 contained only two crayfishes, 4 contained two snails and two crayfishes, and 4 controls). Comparing with the control, the leaf length, number, and biomass of Vallisneria denseserrulata had decreased in the snail-only and crayfish-only treatments. In the crayfish-only treatment, total nitrogen, total phosphorus and total suspended solids had increased compared with the control, while they did not differ between the snail-only and the control treatment. Nutrients and turbidity concentrations did not differ between the snail + crayfish and the crayfish-only treatment, and plant biomass did not differ between the snail + crayfish and the snail-only treatment. These findings suggest that golden apple snails mainly affected the lake ecosystem by plant grazing, while red swamp crayfishes disturbed the sediment by increasing nutrients in the water and through resuspension. These snail and crayfish together had mainly additive effects on macrophyte and the physico-chemical variables studied.
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Ludlam, John P., Brandon T. Banks, and Daniel D. Magoulick. "Density-dependent effects of omnivorous stream crayfish on benthic trophic dynamics." Freshwater Crayfish 21, no. 1 (December 31, 2015): 165–70. http://dx.doi.org/10.5869/fc.2015.v21-1.165.

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Abstract Crayfish are abundant and important consumers in aquatic food webs and crayfish invasions have demonstrated strong effects of crayfish on multiple trophic levels. Density may be an important factor determining the role of omnivorous crayfish in benthic communities, especially if density alters the strength of trophic interactions. The effect of crayfish density on a simple benthic food web using ceramic tiles was examined in three treatments (crayfish exclusion cage, cage control (open to crayfish), and exposed ceramic tiles) in mesocosms stocked with 6, 12, or 18 crayfish·m-2. We hypothesized that at low densities crayfish consumption of herbivorous chironomids would increase algal abundance, but at high densities crayfish would reduce both periphyton and invertebrates. In the experiment, periphyton and chironomid abundance increased with declining crayfish biomass on day 30 but not day 15. The magnitude of crayfish effects on day 15 periphyton chlorophyll a abundance increased with crayfish biomass, but crayfish effects on day 30 periphyton chlorophyll a or chironomid biomass did not increase with crayfish biomass. In this experiment there was little evidence for a trophic cascade at low crayfish densities and strong omnivory by crayfish dominated trophic dynamics.
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Dobrzycka-Krahel, Aldona, and Maria Leonor Fidalgo. "Euryhalinity and Geographical Origin Aid Global Alien Crayfish Invasions." Water 15, no. 3 (February 1, 2023): 569. http://dx.doi.org/10.3390/w15030569.

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Salinity tolerance is a determinant of a narrow or wide distribution range of organisms. Crayfishes are important key species in many aquatic environments so require a better understanding of their ability to live in different saline regimes. We identified all alien crayfish and examined their habitats (freshwater and/or saline) and origins to test whether these factors predict their dispersal. We used contingency tables populated with raw frequency data with χ2—tests and assessed statistical significance at α of 0.05. We identified 21 alien crayfishes and we found that alien crayfish species were disproportionately freshwater (71%), with significantly lower proportions of euryhaline crayfishes inhabiting freshwater to saline environments (29%). Alien crayfishes also significantly disproportionally originate from America (67% of these taxa) when compared to all ‘other’ grouped regions (33%). In total, 36% of American crayfishes represent euryhaline species inhabiting freshwater to saline habitats against only 14% of crayfishes from all “other” grouped regions. This suggests that binomial euryhalinity/origin can help understand the potential of spread. We discussed obtained results with known experimental data on salinity tolerance, osmoregulation, growth, and reproduction of American alien crayfish. The paper will help in the management of crayfish spread.
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Wang, Jianguo, Gang Li, and Yongjun Bao. "Effects of Ammonia Nitrogen, Nitrite and pH on Embryo In Vitro Incubation of Red Crayfish." Journal of Biobased Materials and Bioenergy 17, no. 6 (December 1, 2023): 663–71. http://dx.doi.org/10.1166/jbmb.2023.2324.

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As an important economic aquatic animal, red crayfish’s reproduction and incubation can affect its breeding efficiency. With aquaculture developing, the study of factors affecting aquaculture species growth has gradually become an important research direction. To study the effects of ammonia nitrogen, nitrite and pH on red crayfish embryos, the In Vitro incubation experiment of red crayfish embryos was conducted. The residual module was used to design the embryo counting method of red crayfish. And different ammonia nitrogen, nitrite and PH gradients were set to analyze the hatching rate and emergence rate of red crayfish’s embryo development.When conducting research method performance testing, the training loss value of the research method decreased to 84 after 200 iterations. On the 6th day in an ammonia nitrogen environment, the number of water microbiota was only 4.74 M. The emergence rate of red crayfish decreases to a lower level when the ammonia nitrogen concentration is above 0.6 mg/L. The emergence rate of red crayfish decreased with the increase of nitrite concentration, and decreased to 0 when the nitrite concentration reached 1.25 mg/L. When the pH value of water body is 8.1, the emergence rate of red crayfish reaches the highest value of 68.92%. Ammonia nitrogen and nitrite concentration will inhibit the In Vitro hatching of crayfish embryos, and the appropriate PH value can improve the emergence rate of crayfish hatching In Vitro.
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Egly, Rachel M., and Eric R. Larson. "Distribution, habitat associations, and conservation status updates for the pilose crayfish Pacifastacus gambelii (Girard, 1852) and Snake River pilose crayfish Pacifastacus connectens (Faxon, 1914) of the western United States." PeerJ 6 (September 27, 2018): e5668. http://dx.doi.org/10.7717/peerj.5668.

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Our study evaluates the distribution, habitat associations, and current conservation status of the Snake River pilose crayfish Pacifastacus connectens (Faxon, 1914) and pilose crayfish Pacifastacus gambelii (Girard, 1852), two little-studied and data-deficient species endemic to the western United States. We first developed a species distribution model (SDM) for the pilose crayfishes based on their historical occurrence records using boosted regression trees and freshwater GIS data layers. We then sampled 163 sites in the summers of 2016 and 2017 within the distribution of these crayfishes, including 50 where these species were observed historically. We next compared our field results to modeled predictions of suitable habitat from the SDM. Our SDM predicted 73 sites (45%) we sampled as suitable for the pilose crayfishes, with a moderate AUC value of 0.824. The pilose crayfishes were generally predicted to occur in larger streams and rivers with less extreme upstream temperature and precipitation seasonality. We found the pilose crayfishes at only 20 (12%) of the 163 total sites we sampled, 14 (20%) of the 73 sites predicted as suitable for them by our SDM, and 12 (24%) of 50 historical sites that we sampled. We found the invasive virile crayfish Faxonius virilis (Hagen, 1870) at 22 sites total and 12 (24%) historical sites for the pilose crayfishes, and we found the “native invader” signal crayfish Pacifastacus leniusculus (Dana, 1852) at 29 sites total and 6 (12%) historical sites for the pilose crayfishes. We subsequently used a single classification tree to identify factors associated with our high rate of false positives for contemporary pilose crayfish distributions relative to our SDM. This classification tree identified the presence of invasive crayfishes, impairment of the benthic community, and sampling method as some of the factors differentiating false positives relative to true positives for the pilose crayfishes. Our study identified the historical distribution and habitat associations for P. connectens and P. gambelii using an SDM and contrasted this prediction to results of contemporary field sampling. We found that the pilose crayfishes have seemingly experienced substantial range declines, attributable to apparent displacement by invasive crayfishes and impairment or change to stream communities and habitat. We recommend increased conservation and management attention to P. connectens and P. gambelii in response to these findings.
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Diehl, Kaine M., Nicoleena M. Storer, Hogan D. Wells, Destinee A. Davis, Zachary J. Loughman, and Zackary A. Graham. "On the surface or down below: Field observations reveal a high degree of surface activity in a burrowing crayfish, the Little Brown Mudbug (Lacunicambarus thomai)." PLOS ONE 17, no. 10 (October 14, 2022): e0273540. http://dx.doi.org/10.1371/journal.pone.0273540.

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Opposed to most crayfish species that inhabit permanent bodies of water, a unique burrowing lifestyle has evolved several times throughout the crayfish phylogeny. Burrowing crayfish are considered to be semi-terrestrial, as they burrow to the groundwater—creating complex burrows that occasionally reach 3 m in depth. Because burrowing crayfishes spend most of their lives within their burrow, we lack a basic understanding of the behavior and natural history of these species. However, recent work suggests that burrowing crayfishes may exhibit a higher level of surface activity than previously thought. In the current study, we conducted a behavioral study of the Little Brown Mudbug, Lacunicambarus thomai using video surveillance to determine their degree of surface activity and behavioral patterns. Throughout 664 hrs of footage, we observed a surprisingly high amount of activity at the surface of their burrows—both during the day and night. The percentage of time that individual crayfish was observed at the surface ranged from 21% to 69% per individual, with an average of 42.48% of the time spent at the surface across all crayfish. Additionally, we created an ethogram based on six observed behaviors and found that each behavior had a strong circadian effect. For example, we only observed a single observation of foraging on vegetation during the day, whereas 270 observations of this behavior were documented at night. Overall, our results suggest that burrowing crayfishes may exhibit higher levels of surface activity than previously thought. To increase our understanding of burrowing crayfish behaviors ecology, we encourage the continued use of video-recorded observations in the field and the laboratory.
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Perry, W. L., D. M. Lodge, and G. A. Lamberti. "Impact of crayfish predation on exotic zebra mussels and native invertebrates in a lake-outlet stream." Canadian Journal of Fisheries and Aquatic Sciences 54, no. 1 (January 1, 1997): 120–25. http://dx.doi.org/10.1139/f96-255.

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To test the hypothesis that Orconectes spp. crayfishes could be a significant source of zebra mussel (Dreissena polymorpha) mortality in streams, we conducted a laboratory experiment and a field experiment. In the laboratory experiment, maximum zebra mussel size consumed increased with increasing crayfish size for Orconectes rusticus, Orconectes propinquus, and Orconectes virilis. Slopes differed among crayfish species but not between O. rusticus sexes. To quantify crayfish impacts on seminatural zebra mussel populations, we placed 16 enclosures (0.2 m2) lined with artificial cobble substrata in a midwestern lake-outlet stream (mean width 17 m). Zebra mussels were stocked in each cage (20000 individuals/m2) 14 days before male O. rusticus (20 individuals/m2) were stocked in each of eight enclosures. Densities of all sizes of zebra mussels were reduced in enclosures, with a total density reduction of 31% over the 28 days of the experiment, relative to the exclosures. Crayfish also reduced gastropod densities by 54%, but did not significantly affect other invertebrates. Laboratory and field results suggest that predation by Orconectes crayfishes may significantly reduce zebra mussel populations in streams.
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Russ, William T., and Stephen J. Fraley. "Status Update for Six Rare Crayfishes (Decapoda: Cambaridae) in Western North Carolina." Journal of North Carolina Academy of Science 130, no. 2 (June 1, 2014): 25–39. http://dx.doi.org/10.7572/2167-5880-130.2.25.

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Abstract From 2009–2012 detailed distribution data, information to update conservation status, and additional life history and habitat observations were obtained for six rare crayfishes in Western North Carolina. The Hiwassee Headwaters Crayfish, Cambarus (Puncticambarus) parrishi, continues to occupy a very limited range in Clay County, with most known occurrences from the Tusquitee Creek system. The Chauga Crayfish, C. (P.) chaugaensis, appears to be abundant throughout much of its range in the upper Savannah River Drainage, in Transylvania, Jackson, and Macon counties. The French Broad River Crayfish, C. (P.) reburrus, has declined in Madison and Buncombe counties, while populations in Transylvania County appear to have remained relatively stable. The Broad River Stream Crayfish, C. (Cambarus) lenati continues to occur primarily in the upper First Broad River drainage where it is common in some streams in Rutherford County. The Broad River Spiny Crayfish, C. (P.) spicatus is rare but continues to exist in two isolated populations: upper First Broad and North Pacolet river drainages. The Little Tennessee River Crayfish, C. (P.) georgiae continues to occupy Jackson and Macon counties where it is most abundant in the upper Little Tennessee River Drainage. No range expansions were observed for any of these crayfish species.
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Figiel, Chester R., and Sandra Bohn. "Laboratory experiments for the detection of environmental DNA of crayfish: Examining the potential." Freshwater Crayfish 21, no. 1 (December 31, 2015): 159–63. http://dx.doi.org/10.5869/fc.2015.v21-1.159.

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Abstract We examined methods for detecting environmental DNA of the invasive white river crayfish Procambarus zonangulus. In a laboratory experiment, we investigated detection capability in benthic sediment samples and in water samples in six flow-through tanks. Additionally we determined whether crayfish density (low = 0.67 or high = 2.69 crayfish·m-2) or crayfish time in tanks influenced DNA detectability (collection of samples on Days 2, 5, 8 and 15). Species-specific primers and probes were designed for P. zonangulus and their specificity was tested against other crayfish species. Limits of detection and quantification were specified for the target DNA sequence by means of quantitative PCR amplifications on dilution series of known amounts of P. zonangulus DNA. We detected crayfish DNA in 14 of the 24 benthic sediment samples and in two of the 24 water samples. DNA detection was found in benthic sediment samples in at least two tanks at every sampling period, while DNA detection was found in water samples only on Day 8. Crayfish DNA was detected in benthic sediment and water samples independently of crayfish density. Crayfish at both densities were observed to ‘explore’ all areas of the tank and move irrespective of diurnal time or conspecific presence. These behavior patterns were observed throughout the 15 day experiment and likely resulted in the positive detections, especially in benthic sediment samples. We believe that these methods could benefit monitoring of invasive crayfish species, although there is no doubt that further optimization and more research is needed to evaluate these techniques in the wild.
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Smith, Bradley J. "Density-Dependent Escapement of Rusty Crayfish from Modified Minnow Traps with Varying Throat Configurations." Journal of Fish and Wildlife Management 11, no. 1 (November 25, 2019): 22–32. http://dx.doi.org/10.3996/032019-jfwm-015.

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Abstract Modified minnow traps are the most widely used gear for collecting tertiary burrowing crayfishes. The throats of modified minnow traps are often widened more than 60% to accommodate the capture of larger crayfish. However, widening this crucial chokepoint into the trap may facilitate easier escape of captured individuals, especially as density in the trap increases. Increased escapement rates may reduce catch rates and corresponding estimates of relative abundance and lower detection probability. Incorporating a design feature, that is, throat restriction, that allows entry of all sizes of crayfish while reducing escapement would be an improvement over current designs. Here, I present the results of a paired field and laboratory experiment comparing the effectiveness of modified minnow traps with a throat restriction (restricted) and without such a feature (unrestricted) under varying crayfish densities. I chose rusty crayfish Faxonius rusticus as a study organism because it is widespread and abundant in the Laurentian Great Lakes region and commonly the focus of research and removal efforts. Rusty crayfish capture and escapement were strongly influenced by throat design and crayfish densities. The field component demonstrated that both traps performed similarly under low-to-moderate densities; however, at high densities catch in unrestricted traps plateaued at approximately 50 crayfish/trap, while restricted traps kept accumulating catch up to 155 crayfish/trap. Laboratory trials demonstrated that escapement for both trap types was negligible at low density and slightly higher at medium density: 0.8% for restricted and 11.5% for unrestricted. However, at high density, escapement from restricted traps was 8.8 vs. 45.3% for unrestricted traps. Our findings suggest that inclusion of a throat restriction may increase catch of rusty crayfish by reducing escapement and may be of particular use in removal projects or when sampling in high-density populations.
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Dissertations / Theses on the topic "Crayfish"

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Gladman, Zara F. "Crayfish in Scotland." Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/3977/.

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Unlike the rest of Britain, Scotland has no native crayfish species. There are, however, two introduced species: the white-clawed crayfish (Austropotamobius pallipes) has inhabited Loch Croispol in Sutherland and Whitemoss Reservoir in Renfrewshire for several decades. A. pallipes is endangered in its native range and Scottish stocks may constitute an important conservation resource in the future. The other crayfish species in Scotland, the North American signal crayfish (Pacifastacus leniusculus) was first recorded in the wild in 1995 and has spread rapidly to inhabit many river catchments and standing waters, where it is considered a serious threat to native biodiversity. The purpose of this thesis was to conduct research into the distribution, control and impact of non-native crayfish in Scotland, with a main focus on P. leniusculus. A comparative field study on the River Clyde in southern-central Scotland was used to test the efficacy of different sampling methods for detecting P. leniusculus in shallow, flowing waters. A combination of kick-sampling and three-run electrofishing was shown to be the most effective method and assisted in the development of a crayfish detection protocol. This protocol has been applied by fishery trusts across Scotland to determine the fine-scale distribution of P. leniusculus in rivers. Results of a radio-tracking study in the River Clyde catchment showed that P. leniusculus moves up to 195 m day -1 in lotic habitats, with flow and in-stream barriers identified as potential impediments to movement. In addition to studies of P. leniusculus, surveys were undertaken to assess the status of the two A. pallipes populations in Scotland. Results showed the occurrence of a low density and high density population at Loch Croispol and Whitemoss Reservoir respectively. These sites could serve as long-term “ex-situ” ark sites for A. pallipes but only if measures are taken to mitigate the current biosecurity threats of P. leniusculus and disease. Laboratory studies were used to assess the potential threat of P. leniusculus to Atlantic salmon (Salmo salar) redds and the globally endangered freshwater pearl mussel (Margaritifera margaritifera). The burial of Salmo salar eggs in redds appears to afford protection from predation by P. leniusculus but other life stages may be at greater risk. Crayfish attempted to predate upon M. margaritifera but were unsuccessful, probably due to the thick, protective shell of the adult mussels tested; predation of juvenile mussels is predicted to be more likely. Finally, the impact of a large-scale trapping programme on a population of P. leniusculus in a large lake was evaluated using mark and recapture methods at Loch Ken in southern Scotland. The programme significantly reduced the number of males in the population but its effect on females was complicated by seasonal variation in trappability and the bias of traps towards males. Depth was found to be a significant determinant of the catch of P. leniusculus. Animals were also found to make significant movements of 800 metres in two weeks. Crayfish occur in Loch Ken at densities which are high compared with other lakes and the loss of native biodiversity there is expected to be considerable. Continued research into invasive species such as P. leniusculus will provide valuable data to support management decisions and help tackle what is one of the top five drivers of human-induced global change.
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Beatty, Stephen John. "Translocations of freshwater crayfish : contributions from life histories, trophic relations and diseases of three species in Western Australia /." Access via Murdoch University Digital Theses project, 2005. https://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20050718.152608.

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Studer, Thomas. "Smelling out the competition: Response behavior of naive crayfish to novel crayfish odors." Bowling Green State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1401464496.

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Wong, Frank Yet Kheong. "Study of non-halophilic Vibrio in Australian freshwater crayfish farms : distribution, epidemiology and virulence /." [St. Lucia, Qld. : s.n.], 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16642.pdf.

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Allen, Sarah Kathryn. "Flow Cytometric Analysis of Crayfish Hemocytes." Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/etd/1309.

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Crayfish exhibit innate immune responses via hemocytes and their products. There are 3 hemocyte populations: hyaline cells, granular cells, and semigranular cells. Hemocytes from laboratory housed, untreated crayfish (normal crayfish) have been quantified on the basis of cell type, cell size, and cell granularity using Flow Cytometry. These data present the first overall picture of normal hemocytes from Red Swamp Crayfish with regard to cell type, cell size, and cell granularity and will serve as a baseline for all future studies in our lab. Experiments using crayfish injected with Pseudomonas aeruginosa, Staphylococcus aureus, or crayfish saline alone showed significant and consistent changes in cell type in cells from crayfish injected with bacteria with a decrease in hyaline cells and an increase in granular cells. This effect was greater in crayfish injected with Gram - bacteria. In addition, crayfish injected with Pseudomonas aeruginosa showed a significant difference in Granular cell size with a shift to larger cells and a significant decrease in granularity in the Granular cell population. Cells from crayfish treated with Staphylococcus aureus did not show these changes.
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Harlioğlu, Muzaffer Mustafa. "Comparative biology of the signal crayfish, Pacifastacus leniusculus (Dana), and the narrow-clawed crayfish, Astacus leptodactylus Eschscholtz." Thesis, University of Nottingham, 1996. http://eprints.nottingham.ac.uk/13339/.

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Some aspects of the biology of Pacifastacus leniusculus and Astacus leptodactylus have been compared. The literature survey shows that considerably more studies have been carried out on P. leniusculus than A. leptodactylus. Although no major differences have been found in the morphology of appendages and mouthparts of the species, structural differences have been found in the abundance of setae on the second maxilliped, in the number of teeth on the mandibles and the crista dentata, and form of the chelipeds. Studies on the environmental tolerance of the species show that both species are able to survive in saline water for long periods of time but they can only increase in number in low salinities. Both species can survive over a wide range of temperatures, but they cannot tolerate temperatures of 34 °C after stepwise acclimation. Although the results do not show a clear difference in the tolerance of P. leniusculus and A. leptodactylus to low oxygen, there are some indications that A. leptodactylus is more tolerant of decreased oxygen tensions than P. leniusculus. By using a non-invasive heart beat monitor on crayfish it has been observed that the frequency of heart beats is extremely variable and can be affected by many factors, such as temperature and salinity. Juveniles of the two species can have a significant impact on plant and macroinvertebrate communities. The results also show that both species can have a negative effect on the recruitment of fish populations in freshwaters by eating fish eggs. Competition experiments show that both juveniles and adults of P. leniusculus are significantly more aggressive than those of A. leptodactylus. The results also show that A. leptodactylus would be eliminated by P. leniusculus if they met in a wild. Adults of the species prey on their juveniles, except the brooding females with stage 2s. This predation occurs in the presence of adequate nutrition. Non-predatory behaviour of the brooding females may indicate the presence of pheromones in the species. Reproductive efficiency of the populations of the species in Britain is as good as any studied elsewhere. In comparison to A. leptodactylus, P. leniusculus has more eggs, but smaller in size. Pleopodal egg development of the species can be reduced from seven months to three months with temperature acclimation, but photoperiod is not a factor in reducing pleopodal egg development. In both species sexual dimorphism was observed between males and females. Males of both species and females of P. leniusculus exhibit allometric or isometric growth during their lives but female A. leptodactylus exhibits isometric growth throughout. Comparison of body parameters shows that P. leniusculus can be considered as a morphologically better species to adapt to environmental conditions than A. leptodactylus because it has large and heavy chelae, and heavy body weight. Both species grow fast, but because P. leniusculus hatches earlier it has an advantage over A. leptodactylus and has bigger juveniles by the end of the first summer. In both species males produce significantly more claw meat than females. Although A. leptodactylus produces significantly more tail meat, males of P. leniusculus produce significantly more claw and total meat. Significant differences occur in the tail meat yield of female A. leptodactylus and in the claw meat yield of female P. leniusculus, but males produce similar amount of meat in winter and summer. The Swedish trappy is very effective method of catching both species over a certain size. Day and night catches show that both species are very active during the day and night.
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Herleth-King, Shawna S. "Habitat use of two crayfishes, Orconectes meeki meeki and Orconectes williamsi, in a small Missouri Ozark stream a thesis presented to the faculty of the Graduate School, Tennessee Technological University /." Click to access online, 2009. http://proquest.umi.com/pqdweb?index=25&did=1908035801&SrchMode=1&sid=1&Fmt=6&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1264711002&clientId=28564.

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Bubb, Damian H. "Spatial ecology of white-clawed crayfish Austropotamobius pallipes and signal crayfish Pacifastacus leniusculus in upland rivers, northern England." Thesis, Durham University, 2004. http://etheses.dur.ac.uk/3118/.

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The American signal crayfish Pacifastacus lernusculus, an invasive species widely introduced throughout Europe, is a major threat to native European crayfish species and is causing increasing concern because of its wide impact on aquatic ecosystems. This thesis investigates the within catchment expansion of signal crayfish populations in two upland rivers and the spatial ecology and movement of the introduced signal crayfish and the indigenous white-clawed crayfish Austropotamobius pallipes. Populations of signal crayfish are established and expanding on the upland rivers Wharfe and Ure. On the Wharfe the signal crayfish population is well established and now occupies about 30 km of river and is currently expanding at a rate in excess of 2 km year(^-1). On the Ure the signal crayfish population is younger and currently occupies 1.6 km and is currently expanding at about 0.5 km year(^-1). The range expansion is biased towards downstream in both rivers, by a ratio of about 3:1 (downstream:upstream).The movements and dispersal of white-clawed and signal crayfish was studied utilising a combination of radiotelemetry and internal and external Passive Integrated Transponder (PIT) tags. Radiotagged adult signal crayfish were capable of substantial active movements (maximum movement 790m in 79 days). The level of movement of adults suggests they may have the potential to be responsible for the observed rates of population expansion. Although the movements of radiotagged adult signal crayfish within main river channel were equally distributed upstream and downstream, in-stream barriers both natural and artificial were found to limit the upstream movements of PIT tagged crayfish and this may contribute to the observed downstream bias of signal crayfish population expansion. The movements and dispersal of PIT tagged white-clawed crayfish within a small upland high gradient stream were strongly biased towards downstream. Maximum movement of radiotagged adult signal crayfish occurred during midsummer. Temperature appeared to be a major factor influencing the timing and extent of movements between tracking periods although there was a large variation between individuals. All significant downstream movements made by crayfish were active movements and not the result of passive movement during periods of high discharge. There were no sex or size differences in the dispersal and movement of radiotagged and PIT tagged signal crayfish whilst in PIT tagged white-clawed crayfish size, sex, injuries and duration of tracking influenced extent of movement. The expansion of the signal crayfish population in the River Wharfe appears to lead to the progressive loss of white-clawed crayfish populations where they come into direct contact. Limited differences in the microhabitat utilised by the two species were found where the species were syntopic, suggesting the potential exists for direct competition between the two species. In addition signal crayfish showed greater movement and dispersal than white-clawed crayfish. This may contribute to the ability of signal crayfish to colonise rivers rapidly and may also offer a competitive advantage over white-clawed crayfish thus contributing to the observed replacement. The results are discussed in the context of the conservation and management of crayfish and the ecology of invasive species.
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Berry, Fiona Catherine. "The behavioural function of pheromones in crayfish." Thesis, University of Hull, 2008. http://hydra.hull.ac.uk/resources/hull:5756.

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Pacifastacus leniusculus and Procambarus clarkii are highly invasive freshwater crayfish and are having detrimental impacts on native species and habitats throughout Europe. The application of pheromone baits have been proposed as a way of increasing trap efficiency for population control, however the chemical identity of crayfish pheromones is unknown. An incomplete understanding of chemical communication has delayed progress in the development of appropriate bioassays. This thesis therefore focused on researching the natural context of chemical signalling by crayfish, including signal delivery and receiver response. Urine release by male and female crayfish was found to coincide with aggressive behaviours rather than reproductive behaviours. Female urine release was essential for initiating mating, with males detecting female receptivity by spying on hormones and metabolites released with threat signals. Physiological indicators of reception included a brief cardiac and ventilatory arrest followed by an increase in rate. Both behavioural and physiological responses formed the basis of a novel assay design. During courtship male crayfish do not appear to advertise by urine signals. This raised the question of whether chemical signals were important for female assessment of the quality of size-matched males. When given a free choice, females could not distinguish dominant and subordinate males through chemical signals alone. This suggests that females either use other criteria (e.g. size) for mate choice or perform cryptic postcopulatory mate choice. Blocking natural urine release of crayfish, which had previously fought to establish dominance, and artificially introducing urinary signals proved an effective bioassay for investigating the mechanisms of dominance hierarchy formation. Urine from the dominant male was the key factor in establishing dominance relationships. In the absence of dominant urine, subordinate males were less likely to retreat from aggressive bouts and fights were more intense. The mechanisms of signal delivery during agonistic encounters were investigated by measuring ventilatory activity. Increased ventilation rate was associated with highly aggressive behaviours and urinary signalling. This indicated crayfish create gill currents to disperse signals and increase transfer efficiency from sender to receiver. This thesis sheds light into the mechanism of chemical communication in crayfish and provides the basis for future bioassay guided purification of crayfish pheromones.
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Luan, Xin. "Interspecies aggression and social dominance in crayfish." Bowling Green, Ohio : Bowling Green State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1256151469.

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Books on the topic "Crayfish"

1

Grimm, Phyllis W. Crayfish. Minneapolis, Minn: Lerner Publications, 2001.

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Jun, Nanao, ed. Crayfish. Milwaukee: Raintree Publishers, 1987.

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Jenny, Mountstephen, and Boow Alexandra, eds. The crayfish thief. Bothell, WA: Wright Group/McGraw-Hill, 2000.

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Westman, Kai. Kräftor: Biologi, odling, fiske. Edited by Ackefors Hans 1932- and Nylund Viljo 1949-. [Sweden]: Kiviksgården, 1992.

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International Symposium of Astacology (8th 1990 Baton Rouge, La.). Freshwater crayfish VIII: Papers from the Eighth International Symposium on Astacology, Baton Rouge, Louisiana, USA, 22-26 April 1990. Baton Rouge, La: Louisiana State University Agricultural Center, Louisiana Agricultural Experiment Station, 1995.

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1942-, Holdich D. M., ed. Biology of freshwater crayfish. Oxford [England]: Blackwell Science, 2002.

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M, Lavrentʹeva G., Mit͡s︡kevich O. I, and Gosudarstvennyĭ nauchno-issledovatelʹskiĭ institut ozernogo i rechnogo rybnogo khozi͡a︡ĭstva (Russia), eds. Sostoi͡a︡nie estestvennykh zapasov, vosproizvodstvo i tovarnoe vyrashchivanie rechnykh rakov. Leningrad: Gos. nauchno-issl. in-t ozernogo i rechnogo rybnogo khozi͡a︡ĭstva Rosrybkhoza, 1989.

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Särömaa, Matti J. Rapukirja. Helsinki: Tammi, 1997.

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W.A.) International Symposium of Astacology (13th 2000 Perth. Freshwater crayfish 13: Proceedings of the thirteenth symposium of the International Association of Astacology, Perth, Western Australia, 6-12 August 2000. Lafayette, LA: University of Louisiana at Lafayette, 2002.

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International Symposium of Astacology (7th 1987 Lausanne, Switzerland). Freshwater crayfish VII: Papers from the seventh International Symposium of Astacology, Lausanne, Switzerland 3-5 August 1987. Lausanne: Musée Zoologique Cantonal, 1988.

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Book chapters on the topic "Crayfish"

1

Moore, Paul. "Baringa’s (1996) Crayfish." In Encyclopedia of Evolutionary Psychological Science, 1–6. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-16999-6_2527-1.

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Moore, Paul A. "Baringa’s (1996) Crayfish." In Encyclopedia of Evolutionary Psychological Science, 514–19. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-19650-3_2527.

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Patullo, Blair W., and David L. Macmillan. "To What Extent Can Freshwater Crayfish Recognise Other Crayfish?" In Social Recognition in Invertebrates, 37–48. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-17599-7_3.

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Ye, Zijian, and Yi Mou. "Crayfish Quality Analysis Based on SVM and Infrared Spectra." In Proceeding of 2021 International Conference on Wireless Communications, Networking and Applications, 979–87. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2456-9_99.

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AbstractDifferent algorithms combined with Near-infrared spectroscopy were investigated for the detection and classification of crayfish quality. In this study, the crawfish quality was predicted by partial least square-support vector machine, principal component analysis-support vector machine, BP neural network and support vector machine after pre-processing the NIR spectral data of crawfish. The result shows that the accuracy of near-infrared spectroscopy technology combined with SVM to classify crayfish quality can reach 100%, and the prediction can guide the sampling of crayfish food safety in practice, thus improving food safety and quality.
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Breithaupt, Thomas. "Chemical Communication in Crayfish." In Chemical Communication in Crustaceans, 257–76. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-0-387-77101-4_13.

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Jernelöv, Arne. "Crayfish Plague in Europe." In The Long-Term Fate of Invasive Species, 91–103. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-55396-2_7.

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Zboray, Géza, Kinga Molnár, Zsolt Pálfia, Zsolt Kovács, and György Kriska. "The Spiny-Cheek Crayfish." In Atlas of Comparative Sectional Anatomy of 6 invertebrates and 5 vertebrates, 73–93. Vienna: Springer Vienna, 2010. http://dx.doi.org/10.1007/978-3-211-99763-5_6.

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Krasne, Franklin B., and Donald H. Edwards. "Crayfish Escape Behavior: Lessons Learned." In Crustacean Experimental Systems in Neurobiology, 3–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-642-56092-7_1.

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Westman, Kai. "Alien Crayfish in Europe: Negative and Positive Impacts and Interactions with Native Crayfish." In Invasive Aquatic Species of Europe. Distribution, Impacts and Management, 76–95. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-015-9956-6_9.

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Ramón, Fidel, Jesús Hernández-Falcón, and Theodore H. Bullock. "Brain Electrical Signals in Unrestrained Crayfish." In Modern Approaches to the Study of Crustacea, 7–13. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0761-1_2.

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Conference papers on the topic "Crayfish"

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Sakun, N. V., and O. A. Bodilovskaya. "THE MARBLE CRAYFISH PROCAMBARUS FALLAX AS INVASIVE SPECIES IN THE WATER BODIES OF THE REPUBLIC OF BELARUS." In SAKHAROV READINGS 2022: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY. International Sakharov Environmental Institute of Belarusian State University, 2022. http://dx.doi.org/10.46646/sakh-2022-2-158-161.

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The article describes crayfish species diversity in the territory of the Republic of Belarus, in particular invasive species - the marble crayfish (PROCAMBARUS FALLAX) and the method of its reproduction. Currently, this species is found in many European countries, but there is a serious probability of its spread in the territory of the Republic of Belarus. Many crayfish species listed in the Red Book of the Republic of Belarus may be endangered in case of an invasion of marble crayfish in the water bodies of Belarus.
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Xiao, Bingsong, Rui Wang, Youwei Deng, Yongjian Yang, and Dingding Lu. "Simplified Crayfish Optimization Algorithm." In 2024 IEEE 7th Advanced Information Technology, Electronic and Automation Control Conference (IAEAC). IEEE, 2024. http://dx.doi.org/10.1109/iaeac59436.2024.10503709.

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Ushivtsev, Vladimir, Maya Galaktionova, Sergey Kotenkov, and Tatyana Sinitsyna. "The state of crayfish (Astacidae) populations in a certain area of the Caspian Sea Eastern coast in 2022." In "The Caspian in the Digital Age" within the framework of the International Scientific Forum "Caspian 2021: Ways of Sustainable Development". Dela Press Publishing House, 2022. http://dx.doi.org/10.56199/dpcsebm.iqxy7256.

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The aim is to study crayfish (Astacidae) distribution, fertility and stocks in coastal waters on the Caspian Sea Eastern shelf in the area between cape Rakushechny and cape Tokmak. The research was carried out in summer 2022. The material was collected by shallow-water divers using the method of crayfish route census and selection at the transects with an area of 100-200 m2. Collected samples were speciated, measured, weighed and evaluated from fertility viewpoint. Population was estimated on the basis of crayfish clusters density en routes (ind./m2) with further reestimation within biotopes that were identified using the data of the Caspian Sea satellite monitoring and were specified with the help of a drone. The stocks were estimated on the basis of the collected animals’ length and weight characteristics. Two Astacidae species inhabit the area: Pontastacus eichwald Воtt – long-clawed crayfish, and Caspiastacus pachypus Rathke – thick-clawed crayfish. Comparative analysis of the current results and the data from the 1970s to 1990s has identified that the situation had changed. C. Рachypus habitat has expanded. Both Astacidae species working fertility has decreased. Crayfish stocks in the researched sector have commercial value. Using data from satellite survey and drone observation increase the research objectivity significantly.
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Vongchumyen, Charoen, Punnatat Jiarawongsakul, Panuvut Sombutdee, Kittchai Rueangpoon, and Kiatnarong Tongprasert. "Semi-Automatic Crayfish Farm System." In 2018 International Conference on Engineering, Applied Sciences, and Technology (ICEAST). IEEE, 2018. http://dx.doi.org/10.1109/iceast.2018.8434485.

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Đuretanović, Simona, Tijana Veličković, Aleksandra Milošković, Milena Radenković, Marijana Nikolić, Ivana Maguire, and Vladica Simić. "PRELIMINARY RESULTS REGARDING PHYLOGENY OF THE NOBLE CRAYFISH (DECAPODA, ASTACIDAE, „ASTACUS ASTACUS“) IN SERBIA." In 1st INTERNATIONAL Conference on Chemo and BioInformatics. Institute for Information Technologies, University of Kragujevac,, 2021. http://dx.doi.org/10.46793/iccbi21.222dj.

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The noble crayfish is one of the three autochthonous species that inhabit the freshwater ecosystems of Serbia, along with stone and Danube crayfish. The noble crayfish has a complex historical and genetic status shaped by geological events, habitat loss, pollution, translocations, and reintroductions of both autochthonous and allochthonous crayfish species. That led to the disruption of the species genetic structure, mixing, and loss of populations across Europe. According to recent data, its populations in the freshwater ecosystems of Serbia are significantly reduced, so it has the status of a "strictly protected species". The genetic structure of the species must be known for endangered species conservation. Unfortunately, there is lack of such data for the territory of Serbia, which due to its position on the Balkan Peninsula, was an important refuge during the glaciation period. In this paper, the genetic structure of seven crayfish populations in freshwater ecosystems of Serbia was examined. Analyzes were performed on the COI and 16S rRNA genes of mitochondrial DNA. The study results showed a significant diversity of COI and 16S rRNA haplotypes compared to already described haplotypes. Three haplotypes were detected, of which Hap26 is the most common and was detected in five studied populations. Haplotypes Hap47 and Hap49 were detected in one and two populations, respectively. The results obtained in this study, together with previously published morphometric data, represent a good starting point for further genetic and population research, which are the basis for the proposal of conservation measures.
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I.V., Tkacheva, Rumyantseva E.V., and Oganisyan M.M. "TECHNOLOGIE FOR GROWING AUSTRALIAN RED-CLAWED CRAYFISH (CHERAX QUADRICARINATUS)." In II INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE "DEVELOPMENT AND MODERN PROBLEMS OF AQUACULTURE" ("AQUACULTURE 2022" CONFERENCE). DSTU-Print, 2022. http://dx.doi.org/10.23947/aquaculture.2022.151-153.

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This article discusses the cultivation of Australian red-clawed crayfish, namely a costeffective and practical cultivation technology, its adaptability to this method of cultivation, as well as a brief description of the object.
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LaPierre, Kari R., and Judith Nagel-Myers. "OBSERVATIONS ON CRAYFISH PREDATION IN NORTHERN NEW YORK." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-318578.

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Pitinova, Maria, Yulia Kalyuzhnaya, and Alexander Logvinov. "Ultrastructural changes in the crayfish abdominal ganglia after axotomy." In Optical Technologies for Biology and Medicine, edited by Elina A. Genina and Valery V. Tuchin. SPIE, 2022. http://dx.doi.org/10.1117/12.2623573.

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Borovyk, I. I., and O. M. Marenkov. "FERTILITY INDICATORS OF RIVER CRAYFISH POPULATIONS OF PRYDNIPROVYA RESERVOIRS." In NEW CONCEPTS, THEORETICAL AND PRACTICAL PROBLEMS IN THE FIELD OF AGRICULTURAL SCIENCES AND FOOD. Izdevnieciba “Baltija Publishing”, 2024. http://dx.doi.org/10.30525/978-9934-26-420-7-16.

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Johnson, M. F., S. P. Rice, and I. Reid. "Disturbance of fluvial gravel substrates by signal crayfish (Pacifastacus leniusculus)." In BHS 3rd International Conference. British Hydrological Society, 2010. http://dx.doi.org/10.7558/bhs.2010.ic62.

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Reports on the topic "Crayfish"

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Fletcher, Kenneth. Febrile response and activity in the crayfish, Pacifasticus leniusculus trowbridgii. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.5693.

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Elizur, Abigail, Amir Sagi, Gideon Hulata, Clive Jones, and Wayne Knibb. Improving Crustacean Aquaculture Production Efficiencies through Development of Monosex Populations Using Endocrine and Molecular Manipulations. United States Department of Agriculture, June 2010. http://dx.doi.org/10.32747/2010.7613890.bard.

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Background Most of Australian prawn aquaculture production is based on P. monodon. However, the Australian industry is under intense competition from lower priced overseas imports. The availability of all-female monosex populations, by virtue of their large size and associated premium prize, will offer competitive advantage to the industry which desperately needs to counteract competitors within this market. As for the redclaw production in Israel, although it is at its infancy, the growers realized that the production of males is extremely advantageous and that such management strategy will change the economic assumptions and performances of this aquaculture to attract many more growers. Original objectives (as in original proposal) Investigating the sex inheritance mechanism in the tiger prawn. Identification of genes expressed uniquely in the androgenic gland (AG) of prawns and crayfish. The above genes and/or their products will be used to localize the AG in the prawn and manipulate the AG activity in both species. Production of monosex populations through AG manipulation. In the prawn, production of all-female populations and in the crayfish, all-male populations. Achievements In the crayfish, the AG cDNA library was further screened and a third AG specific transcript, designated Cq-AG3, had been identified. Simultaneously the two AG specific genes, which were previously identified, were further characterized. Tissue specificity of one of those genes, termed Cq-AG2, was demonstrated by northern blot hybridization and RNA in-situ hybridization. Bioinformatics prediction, which suggested a 42 amino acid long signal anchor at the N-terminus of the deduced Cq-AG2, was confirmed by immunolocalization of a recombinant protein. Cq-IAG's functionality was demonstrated by dsRNA in-vivo injections to intersex crayfish. Cq-IAGsilencing induced dramatic sex-related alterations, including male feature feminization, reduced sperm production, extensive testicular apoptosis, induction of the vitellogeningene expression and accumulation of yolk proteins in the ovaries. In the prawn, the AG was identified and a cDNA library was created. The putative P. monodonAG hormone encoding gene (Pm-IAG) was identified, isolated and characterized for time of expression and histological localization. Implantation of the AG into prawn post larvae (PL) and juveniles resulted in phenotypic transformation which included the appearance of appendix masculina and enlarged petasma. The transformation however did not result in sex change or the creation of neo males thus the population genetics stage to be executed with Prof. Hulata did not materialized. Repeated AG implantation is currently being trialed. Major conclusions and Implications, both scientific and agricultural Cq-IAG's involvement in male sexual differentiation had been demonstrated and it is strongly suggested that this gene encodes an AG hormone in this crayfish. A thorough screening of the AG cDNA library shows Cq-IAG is the prominent transcript within the library. However, the identification of two additional transcripts hints that Cq-IAG is not the only gene mediating the AG effects. The successful gene silencing of Cq-IAG, if performed at earlier developmental stages, might accomplish full and functional sex reversal which will enable the production of all-male crayfish populations. Pm-IAG is likely to play a similar role in prawns. It is possible that repeated administration of the AG into prawn will lead to the desired full sex reversal, so that WZ neo males, crossed with WZ females can result in WW females, which will form the basis for monosex all-female population.
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Sanders, Larry. The Androgenic Glands of the Pacific Crayfish, Pacifastacus Leniusculus Trowbridgii Stimpson, 1859. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.2387.

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Salmon, John. Polychlorinated biphenyls: uptake by Daphnia and residues in crayfish from the Willamette River. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.966.

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Story of an Invasion: A Case Study of the Rusty Crayfish in the Great Lakes. American Museum of Natural History, 2010. http://dx.doi.org/10.5531/cbc.ncep.0028.

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This case study examines the story of an invasive species in the Great Lakes. Through a case analysis based format, the case study aims to provide undergraduate level students with a solid understanding of the importance of the Great Lakes and the threats posed to the ecosystem by invasive species. Students will work to comprehend and interpret data indicating the process of invasion by non-native species and biological traits that promote invasiveness, how non-native species can impact native species, communities, and ecosystems, and potential management and control solutions. The case study lesson includes final questions designed to broaden the discussion on aquatic invasive species. Further resources are provided to allow students to continue exploring the story. By completing the case study, students will have an appreciation for the challenges involved in combating established invasive species and the importance of education and awareness for preventing future ‘invasion stories.’
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Trace-element enrichment in streambed sediment and crayfish, Carson and Truckee rivers, Nevada and California, September 1992. US Geological Survey, 1998. http://dx.doi.org/10.3133/wri974258.

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