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Neuroanatomy and morphological diversity of brain cells from adult crayfish cherax quadricarinatus

Journal of Oceanology and Limnology 2018年第6期36卷 2368-2378页

作者：段虎金松君李富花张晓军相建海 Key Laboratory of Experimental Marine Biology Institute of OceanologyChinese Academy of Sciences Laboratory for Marine Biology and Biotechnology Qingdao National Laboratory for Marine Science and Technology

As in vertebrates, brains play key roles in rhythmic regulation, neuronal maintenance, diff erentiation and function, and control of the release of hormones in arthropods. But the structure and functional domains of the brain are still not very clear in crustaceans. In the present study, we reveal the structural details of the brain in the redclaw crayfish using hematoxylin-eosin staining and microscopic examination, firstly. The brain of crayfish is consist of three main parts, namely, protocerebrum, deutocerebrum, and tritocerebrum, including some tracts and commissures, briefly. Secondly, at least 9 kinds of brain cells were identified on the basis of topology and cell shapes, as well as antibody labeling. We also provide morphological details of most cell types, which were previously un-described. In general, four types of glia and three types of neurosecretory cells were described except cluster 9/11 and cluster 10 cells. Glia were categorized into another three main kinds:(1) surface glia;(2) cortex glia; and(3) neuropile glia in addition to astrocytes identified by GFAP labelling. And neurosecretory cells were categorized into I, Ⅱ and III types based on morphological observation. Finally, cluster 9/11 and 10 cells derived from the brain of crayfish, could be used for primary culture about 7–9 d under the optimized conditions. There results provide a resource for improving the knowledge of the still incompletely defined neuroendocrinology of this species. Using the crayfish as an animal model, we are easy to carry out further research in manipulating their endocrine system, exploring cellular and synaptic mechanisms so much as larval production on a small scale, such as in a cell or tissue.

关键词： cherax quadricarinatus brain’s structure brain cells primary culture

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Treatments for Temnocephalids Ectosymbiont Craspedella sp. on cherax quadricarinatus and cherax albertisii “Papua Freshwater Lobster”

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World Journal of Engineering and Technology 2015年第4期3卷 48-54页

作者： Desy Sugiani Angela Mariana Lusiastuti Taukhid Uni Purwaningsih Research Institute for Freshwater Aquaculture Ministry of Marine Affairs and Fisheries Bogor Indonesia

There were two species of crayfish “red-claw” (cherax quadricarinatus) and “blue-huna” (cherax albertisii) for their aquaculture potential. Crayfish were susceptible to fungal (crawfish plague), parasitic (protozoa and nematodes), and bacterial pathogen. A number of ectosymbiont Craspedella sp. have been observed on red-claw and blue-huna. The flatworms were commonly found almost in the whole body, on the upper exoskeleton behind the head, in the gill cavity and on the claws and underside of crayfish. Although their number sometimes was very high, they didn’t cause any problems especially for the new molting crayfish. Micro organisms living on the crayfish surface body and worms didn’t cause any pathological changes. Adults Craspedella sp. can be eliminated by a short bath in salt water or formaldehyde 37% solutions for several hours. This treatment didn’t kill worm eggs, so it needs to be repeated every one week. Moreover, hyposalinity or OST (Osmotic Shock Therapy) is one of the most effective therapies for ectoparasites on Craspedella sp. with dose of bath treatment 15 grams per litre of salt (15 ppt) for more than 3 hours, and dipped in salt water at 30 ppt (or 3.0 ppm, seawater salinity) for 15 - 20 minutes.

关键词： Craspedella sp. cherax quadricarinatus cherax albertisii Treatment

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Unrecognized diversity in New Guinean crayfish species (Decapoda, Parastacidae): The evidence from molecular data

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Integrative Zoology 2016年第6期11卷 457-468页

作者： Martin BLÁHA Jiří PATOKA Pavel KOZÁK Antonín KOUBA Faculty of Fisheries and Protection of Waters South Bohemian Research Center of Aquaculture and Biodiversity of HydrocenosesUniversity of South Bohemia inČeskéBudějoviceVodňanyCzech Republic Department of Zoology and Fisheries Faculty of AgrobiologyFood and Natural ResourcesCzech University of Life Sciences PraguePrahaCzech Republic

The phylogenetic relationships among imported ornamental crayfish belonging to the genus cherax were inferred from a combined dataset of 3 mitochondrial genes(COI,16S and 12S)and by comparison with available GenBank sequences of 14 cherax species.Furthermore,the concordance of previously described species obtained from a wholesaler(cherax boesemani,C.holthuisi and C.peknyi)with available GenBank sequences was verified based on COI with special respect to comparison with sequences assigned as cherax species.Recently described species C.gherardiae,C.pulcher and C.subterigneus belong to the northern group of Cherax species.Comparison and analysis with other GenBank COI sequences show previously unreported diversity of New Guinean species,suggesting 5 putative new species.Surprisingly,species assigned to the subgenus Astaconephrops do not form a monophyletic clade;this subgenus should be reappraised relative to the purported typical morphological characteristic of the uncalcified patch on male chelae.Increasing importation of crayfish underscores the importance of accurate species identification.Use of basic molecular methods is a necessary requisite for documenting occurrence,abundance and population trends of target species.Consequently,it helps to support eventual conservation decision-making by stakeholders.

关键词： cherax cytochrome c oxidase DNA barcoding mitochondrial DNA ornamental crayfish

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