Ecdysone receptor and retinoid X receptor are key regulators in molting. Here, full length ecdysone receptor (PcEcR) and retinoid X receptor (PcRXR) cDNAs from Procambarus clarkii were cloned. Full length cDNA of PcEcR has 2500 bp, encoding 576 amino acid proteins, and full length cDNA of PcRXR has 2593 bp, in which a 15 bp and a 204 bp insert/deletion splice variant regions in DNA binding doma...

BACKGROUND The red swamp crawfish, Procambarus clarkii, has become one of the most economically important cultured species in China. Currently, little is known about the gonadal development of this species. Isolation and characterization of genes are an initial step towards understanding gonadal development of P. clarkii. RESULTS Using the 454 pyrosequencing technology, we obtained a total of...

In the course of research conducted on Procambarus clarkii (Girard, 1852) in Colombia, Ramphocorixa rotundocephala Hungerford, 1927 was collected Güitoque Lake, outside town Gachantivá, Boyacá. The species identified from adult males found there. This aquatic insect occurs mostly Central and North America, but there are also two records Venezuela South America. is...

8 Invasive alien predators can impose strong selection on native prey populations and induce rapid 9 evolutionary change in the invaded communities. However, studies on evolutionary responses to 10 invasive predators are often complicated by the lack of replicate populations differing in 11 coexistence time with the predator, which would allow determining how prey traits change during 12 the in...

The red swamp crayfish, Procambarus clarkii, is a native species in north-eastern Mexico and south-central USA. P. clarkii was introduced to China 1929 has been used as an aquaculture since 1983. It currently exists most of the provinces China, but threatens local fish, crustaceans, aquatic plants freshwater ecosystems. We examined genetic variation partial mitochondrial ND2 gene 831 individual...

The major component of the animal egg yolk is lipoglycoprotein vitellin, derived from its precursor vitellogenin (VTG), which produced species-specifically in decapod crustaceans hepatopancreas and/or ovary reproductive females. Previous studies on Procambarus clarkii vitellogenesis report existence two single VTGs. Here, a multiple tissue transcriptome including ovaries and P. clarkii, we char...

Reproductive strategy is a central feature of the ecology of invasive species as it determines the potential for population increase and range expansion. The red swamp crayfish, Procambarus clarkii, has invaded many countries and caused serious problems in freshwater ecosystems. However, little is known about the effects of environmental conditions on crayfish paternity and offspring traits in ...

The spreading of new crayfish species poses a serious risk for freshwater ecosystems; because they are omnivores they influence more than one level in the trophic chain and they represent a significant part of the benthic biomass. Both the environmental change through global warming and the expansion of the pet trade increase the possibilities of their spreading. We investigated the potential o...