Environmental cues during overland dispersal by three freshwater invaders: Eriocheir sinensis, Pacifastacus leniusculus, and Procambarus clarkii (Crustacea, Decapoda)

Hydrobiologia ◽  
2014 ◽  
Vol 742 (1) ◽  
pp. 81-93 ◽  
Author(s):  
M. Marques ◽  
F. Banha ◽  
M. Águas ◽  
P. Anastácio
Keyword(s):  
Procambarus Clarkii ◽  
Eriocheir Sinensis ◽  
Pacifastacus Leniusculus ◽  
Environmental Cues

scholarly journals Similarities between decapod and insect neuropeptidomes

2016 ◽  
Author(s):  
Jan A Veenstra
Keyword(s):  
Procambarus Clarkii ◽  
Carcinus Maenas ◽  
Macrobrachium Rosenbergii ◽  
Homarus Americanus ◽  
Eriocheir Sinensis ◽  
Insect Species ◽  
Cdna Libraries ◽  
Scylla Paramamosain ◽  
Dna Assembly ◽  
Physiological Processes

Background. Neuropeptides are important regulators of physiological processes and behavior. Although they tend to be generally well conserved, recent results using trancriptome sequencing on decapod crustaceans give the impression of significant differences between species, raising the question whether such differences are real or artefacts. Methods. The BLAST+ program was used to find short reads coding neuropeptides and neurohormons in publicly available short read archives. Such reads were then used to find similar reads in the same archives and the DNA assembly program Trinity was employed to construct contigs encoding the neuropeptide precursors as completely as possible. Results. The seven decapod species analyzed in this fashion, the crabs Eriocheir sinensis, Carcinus maenas and Scylla paramamosain, the shrimp Litopenaeus vannamei, the lobster Homarus americanus, the fresh water prawn Macrobrachium rosenbergii and the crayfish Procambarus clarkii had remarkably similar neuropeptidomes. Although some neuropeptide precursors could not be assembled, in many cases individual reads pertaining to the missing precursors show unambiguously that these neuropeptides are present in these species. In other cases the tissues that express those neuropeptides were not used in the construction of the cDNA libraries. One novel neuropeptide was identified, elongated PDH (pigment dispersing hormone), a variation on PDH that has a two amino acid insertion in its core sequence. Hyrg is another peptide that is ubiquitously present in decapods and is likely a novel neuropeptide precursor. Discussion. Many insect species have lost one or more neuropeptide genes, but apart from elongated PDH and hyrg all other decapod neuropeptides are present in at least some insect species and allatotropin is the only insect neuropeptide missing from decapods. This strong similarity between insect and decapod neuropeptidomes makes it possible to predict the receptors for decapod neuropeptides that have been deorphanized in insects. This includes the androgenic insulin like peptide that seems to be homologous to drosophila insulin-like peptide 8.

Prevalence of the crayfish plague, Aphanomyces astaci Schikora, in alien crayfish species in Japan

2020 ◽  
Vol 25 (1) ◽  
pp. 31-37
Author(s):  
Kensuke Kamimura ◽  
Tadashi Kawai
Keyword(s):  
Water Temperature ◽  
Procambarus Clarkii ◽  
Severe Disease ◽  
Pacifastacus Leniusculus ◽  
Infection Prevalence ◽  
Infection Status ◽  
Aphanomyces Astaci ◽  
Invasive Crayfish ◽  
The Relationship ◽  
Crayfish Species

Abstract Crayfish plague is a severe disease of crayfish that is caused by the oomycete Aphanomyces astaci. Two crayfish hosts of this parasite, Procambarus clarkii and Pacifastacus leniusculus, were imported from North America into Japan and were found to be infected with this parasite. Since the endemic Japanese crayfish, Cambaroides japonicus, has a low resistance to the crayfish plague, infection with this parasite will likely lead to crayfish death. Specimens of both invasive crayfish species were collected across Japan and their infection status was examined using a PCR technique. Aphanomyces astaci was detected in all localities and the average infection prevalence was 67%. Additionally, when the signs of melanization were compared with the results from PCR analyses, it suggested that the DNA detection procedure is more reliable than observation of tissue melanization. Moreover, the relationship between prevalence and water temperature in the field was analyzed, indicated that water temperature influenced the prevalence of A. astaci infection.

scholarly journals Similarities between decapod and insect neuropeptidomes

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2043 ◽  
Author(s):  
Jan A. Veenstra
Keyword(s):  
Procambarus Clarkii ◽  
Carcinus Maenas ◽  
Macrobrachium Rosenbergii ◽  
Homarus Americanus ◽  
Eriocheir Sinensis ◽  
Insect Species ◽  
Cdna Libraries ◽  
Scylla Paramamosain ◽  
Dna Assembly ◽  
Physiological Processes

Background.Neuropeptides are important regulators of physiological processes and behavior. Although they tend to be generally well conserved, recent results using trancriptome sequencing on decapod crustaceans give the impression of significant differences between species, raising the question whether such differences are real or artefacts.Methods.The BLAST+ program was used to find short reads coding neuropeptides and neurohormons in publicly available short read archives. Such reads were then used to find similar reads in the same archives, and the DNA assembly program Trinity was employed to construct contigs encoding the neuropeptide precursors as completely as possible.Results.The seven decapod species analyzed in this fashion, the crabsEriocheir sinensis, Carcinus maenasandScylla paramamosain, the shrimpLitopenaeus vannamei, the lobsterHomarus americanus, the fresh water prawnMacrobrachium rosenbergiiand the crayfishProcambarus clarkiihad remarkably similar neuropeptidomes. Although some neuropeptide precursors could not be assembled, in many cases individual reads pertaining to the missing precursors show unambiguously that these neuropeptides are present in these species. In other cases, the tissues that express those neuropeptides were not used in the construction of the cDNA libraries. One novel neuropeptide was identified: elongated PDH (pigment dispersing hormone), a variation on PDH that has a two-amino-acid insertion in its core sequence. Hyrg is another peptide that is ubiquitously present in decapods and is likely a novel neuropeptide precursor.Discussion.Many insect species have lost one or more neuropeptide genes, but apart from elongated PDH and hyrg all other decapod neuropeptides are present in at least some insect species, and allatotropin is the only insect neuropeptide missing from decapods. This strong similarity between insect and decapod neuropeptidomes makes it possible to predict the receptors for decapod neuropeptides that have been deorphanized in insects. This includes the androgenic insulin-like peptide that seems to be homologous to drosophila insulin-like peptide 8.

scholarly journals Assessment of Essential Elements Accumulation in Red Swamp Crayfish Revealing the High Efficient Enrichment of Se in Freshwater Animal

2021 ◽  
Author(s):  
Guohui Peng ◽  
Junxiao Sun ◽  
Lijing Xiong ◽  
Bo Peng ◽  
Yunfei Tan ◽  
...  
Keyword(s):  
Trace Elements ◽  
Procambarus Clarkii ◽  
Eriocheir Sinensis ◽  
Abdominal Muscle ◽  
Essential Elements ◽  
Hunan Province ◽  
Benthic Habitat ◽  
Red Swamp Crayfish ◽  
High Efficient ◽  
Hypophthalmichthys Nobilis

Abstract BackgroundRed swamp crayfish (Procambarus clarkii) is one of the important aquatic foods for human. Trace elements are indispensable for human to maintain health. They could be enriched by crayfish lived in benthic habitat. However, the trace essential element in crayfish was less reported. In this study, we investigated the trace elements of Fe, Mn, Cu, Zn and Se accumulation in red swamp crayfish.MethodsFifteen crayfishes in average, three samples of sediments and water were respectively collected in each location of the fifteen villages located on Hubei and Hunan province of China. Besides, fifteen individuals for red swamp crayfish (Procambarus clarkii), variegated carp (Hypophthalmichthys nobilis) and hairy crabs (Eriocheir sinensis) were respectively collected in the village of Zhutong of Hubei province in China. Inductively coupled plasma mass spectrometry (ICP-MS) was used to perform the examination of trace elements. SPSS software and Duncan test were employed to conduct statistical analysis, respectively.ResultsThe concentrations of the five elements were highest in haptopancreas, but two of them (Fe and Mn) were lowest in abdominal muscle. The concentration of Cu, Zn and Se in abdominal muscle was higher than those in exoskeleton. The concentrations of Cu and Se in abdominal muscle of crayfish from Ensi region was highest comparing to the other three regions. There was a highly significant positive correlation for the concentrations of Cu and Se between crayfish and environment. In addition, we found crayfish could specifically enrich Se element. The similar situations were also found in the two investigated freshwater animals variegated carp (Hypophthalmichthys nobilis) and hairy crabs (Eriocheir sinensis).ConclusionThe five essential elements were enriched in the abdominal muscle of crayfish, but no excess threshold of food safety standard. The supplement of selenium for human could be realized by consuming crayfish and other freshwater animals.

scholarly journals Similarities between decapod and insect neuropeptidomes

2016 ◽  
Author(s):  
Jan A Veenstra
Keyword(s):  
Procambarus Clarkii ◽  
Carcinus Maenas ◽  
Macrobrachium Rosenbergii ◽  
Homarus Americanus ◽  
Eriocheir Sinensis ◽  
Insect Species ◽  
Cdna Libraries ◽  
Scylla Paramamosain ◽  
Dna Assembly ◽  
Physiological Processes

Background. Neuropeptides are important regulators of physiological processes and behavior. Although they tend to be generally well conserved, recent results using trancriptome sequencing on decapod crustaceans give the impression of significant differences between species, raising the question whether such differences are real or artefacts. Methods. The BLAST+ program was used to find short reads coding neuropeptides and neurohormons in publicly available short read archives. Such reads were then used to find similar reads in the same archives and the DNA assembly program Trinity was employed to construct contigs encoding the neuropeptide precursors as completely as possible. Results. The seven decapod species analyzed in this fashion, the crabs Eriocheir sinensis, Carcinus maenas and Scylla paramamosain, the shrimp Litopenaeus vannamei, the lobster Homarus americanus, the fresh water prawn Macrobrachium rosenbergii and the crayfish Procambarus clarkii had remarkably similar neuropeptidomes. Although some neuropeptide precursors could not be assembled, in many cases individual reads pertaining to the missing precursors show unambiguously that these neuropeptides are present in these species. In other cases the tissues that express those neuropeptides were not used in the construction of the cDNA libraries. One novel neuropeptide was identified, elongated PDH (pigment dispersing hormone), a variation on PDH that has a two amino acid insertion in its core sequence. Hyrg is another peptide that is ubiquitously present in decapods and is likely a novel neuropeptide precursor. Discussion. Many insect species have lost one or more neuropeptide genes, but apart from elongated PDH and hyrg all other decapod neuropeptides are present in at least some insect species and allatotropin is the only insect neuropeptide missing from decapods. This strong similarity between insect and decapod neuropeptidomes makes it possible to predict the receptors for decapod neuropeptides that have been deorphanized in insects. This includes the androgenic insulin like peptide that seems to be homologous to drosophila insulin-like peptide 8.

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