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Registros recuperados: 8
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A Scanning Electron Microscopic Study on the Appendage Morphology of Astacus leptodactylus (Eschscholtz, 1823) and Pacifastacus leniusculus (Daña, 1852) (Crustácea:Decapoda: Astacoidea) International Journal of Morphology
Mustafa Harlioglu,Muzaffer.
This study compares the morphology of rostrum, pereipods 1,2,4 and mouthparts of juvenile Astacus leptodactylus with those oí Pacifastacus leniusculus. Differences in morphology were observed, in particular with regard to the mouthparts e.g. including setal armature and number of teeth on the mandible. In general, the shape of the rostra in the two species is similar in that both taper to a point with a pair of sharp spines distally. Laterally the rostrum of A. leptodactylus is bordered by a regular row of setae, which is not so well defined in P leniusculus. The observations also showed that in addition to an increase in size, changes in morphology in the feeding apparatus between the developmental stages of the two species were present. It was concluded...
Tipo: Journal article Palavras-chave: Appendages; Astacus; Crayfish; Mouthparts; Pacifastacus; Scanning electrón microscope.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000400040
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Culturally significant fisheries: keystones for management of freshwater social-ecological systems Ecology and Society
Noble, Mae; Fenner School of Environment and Society, The Australian National University; mae.noble@anu.edu.au; Duncan, Phil; Gamilaroi Traditional Owner, NSW Aboriginal Land Council; phil.duncan@alc.org.au; Perry, Darren; Murray Lower Darling Rivers Indigenous Nations; ngintait@gmail.com; Prosper, Kerry; Paq'tnekek Mi'kmaq First Nations; kerryp@paqtnkek.ca; Rose, Denis; Gunditj Mirring Traditional Owners Aboriginal Corporation; Denis@gunditjmirring.com; Schnierer, Stephan; School of Environment, Science and Engineering, Southern Cross University; stephan.schnierer@scu.edu.au; Tipa, Gail; Tipa and Associates Ltd.; gttipa@vodafone.co.nz; Williams, Erica; National Institute of Water and Atmospheric Research; Erica.Williams@niwa.co.nz; Woods, Rene; National Cultural Flows Program; Murray Lower Darling River Indigenous Nations; woodsre83@gmail.com; Pittock, Jamie; Fenner School of Environment and Society, The Australian National University; jamie.pittock@anu.edu.au.
Indigenous peoples of North America, Australia, and New Zealand have a long tradition of harvesting freshwater animals. Over generations of reliance and subsistence harvesting, Indigenous peoples have acquired a profound understanding of these freshwater animals and ecosystems that have become embedded within their cultural identity. We have identified trans-Pacific parallels in the cultural significance of several freshwater animal groups, such as eels, other finfish, bivalves, and crayfish, to Indigenous peoples and their understanding and respect for the freshwater ecosystems on which their community survival depends. In recognizing such cultural connections, we found that non-Indigenous peoples can appreciate the deep significance of freshwater animals...
Tipo: Peer-Reviewed Synthesis Palavras-chave: Adaptive freshwater management; Aquatic resources; Bivalve; Comanagement; Crayfish; Cultural keystone species; Eel; Indigenous ecological knowledge; Indigenous water rights; Lamprey; Salmon; Social-ecological resilience.
Ano: 2016
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Effects of serotonin and fluoxetine on blood glucose regulation in two decapod species BJMBR
Santos,E.A.; Keller,R.; Rodriguez,E.; Lopez,L..
One of the best known crustacean hormones is the crustacean hyperglycemic hormone (CHH). However, the mechanisms involved in hormone release in these animals are poorly understood, and thus constitute the central objective of the present study. Different groups of crustaceans belonging to diverse taxa (Chasmagnathus granulata, a grapsid crab and Orconectes limosus, an astacid) were injected with serotonin, fluoxetine, or a mixture of both, and glycemic values (C. granulata and O. limosus) and CHH levels (O. limosus) were determined after 2 h in either submerged animals or animals exposed to atmospheric air. Both serotonin and fluoxetine caused significant hyperglycemia (P<0.05) after injection into the blood sinus of the two species, an effect enhanced...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crustacean; Reproduction; Endocrinology; CHH; Crab; Crayfish.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000100009
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Gill Morphology in the Red Swamp Freshwater Crayfish Procambarus clarkii (Crustacea: Decapoda: Cambarids) (Girard 1852) from the River Nile and its Branches in Egypt International Journal of Morphology
Abumandour,Mohamed M.
The aim of the present study was focused on and describes the gross morphological and scanning electron microscopical features of the gill of the red swamp freshwater crayfish. Our results noted that: all gills have the same general structure and appearance. The gill consists of axis with numerous finger-like filaments, having three morphological types; round, pointed and somewhat hooked shaped. There is a variation in the direction of filaments according to their position, in middle part were nearly perpendicular to gill axis while in the apex were nearly parallel to axis. There were characteristic system of gill spines on central axis, basal plate, setobranch and on the bilobed epipodal plate. There are four shape of spinated-like parts of setobranch...
Tipo: Journal article Palavras-chave: Crayfish; Filaments; Spines; Setobranch setae.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100025
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O crescimento de Parastacus defossus (Crustacea: Decapoda: Parastacidae) Rev. Bras. Zool.
Noro,Clarissa K.; Buckup,Ludwig.
The present study investigates the growth of Parastacus defossus Faxon, 1898, a fossorial species known only from Brazil (state of Rio Grande do Sul) and Uruguay. The estimated growth curve was calculated for animals from the wild and for juveniles cultivated in the laboratory. The specimens were collected monthly between January, 2003 to August, 2005, in Lami region, municipality of Porto Alegre, state of Rio Grande do Sul, Brazil. The VON BERTALANFFY (1938) growth model was used to estimate the growth curve . To calculate the modal values from the frequency distributions the software PeakFit 4.12© SeaSolve Inc., was employed. The growth curve for field animals is described by the equation: Lt = 30,98 [1 - e-0,0026 (t+44,86)] and for the juveniles...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crayfish; Growth curve; Von Bertalanffy.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000100009
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Seasonal variation of the effect of high-carbohydrate and high-protein diets on the intermediate metabolism of Parastacus brasiliensis (Crustacea, Decapoda, Parastacidae) maintained in the laboratory Iheringia, Sér. Zool.
Dutra,Bibiana K.; Silva,Karina M. da; Zank,Caroline; Conter,Maria R.; Oliveira,Guendalina T..
The goal of this study was to evaluate the effect of a high-carbohydrate diet (HC) and a high-protein diet (HP) on the metabolism of the crayfish Parastacus brasiliensis (Von Martens, 1869), collected in different seasons and maintained in the laboratory for 15 days. Crayfish were collected monthly from January 2002 to January 2004 at São Francisco de Paula, Southern Brazil, in Guarapirá stream. In the laboratory, the animals were kept submerged in aquariums under controlled conditions. They were fed ad libitum, for 15 days with either a HC or HP diet. At the end of this period, haemolymph samples were collected, as were hepatopancreas, gills, and abdominal muscle that were removed for determination of glycogen, free glucose, lipids, and triglycerides. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crayfish; Experimental culture; Diet; Metabolism; Seasonality.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000400003
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Seasonal variations in the intermediate metabolism of the crayfish Parastacus brasiliensis (Crustacea, Decapoda, Parastacidae) in the natural environment and experimental culture Iheringia, Sér. Zool.
Dutra,Bibiana K.; Zank,Caroline; Silva,Karina M. da; Conter,Maria R.; Oliveira,Guendalina T..
The goal of this study was to evaluate the effects of seasonal variations on energy metabolism in different tissues of the freshwater crayfish Parastacus brasiliensis (von Martens, 1869). Crayfish were collected monthly from January 2001 to January 2003 in São Francisco de Paula, Rio Grande do Sul, Brazil, in a stream and in a culture tank. Haemolymph samples were collected from each crayfish in the field with a syringe, by puncturing the membrane at the base of the chelipeds. Hepatopancreas, gills, and abdominal muscle were removed for determination of free glucose, glycogen, total lipids, and triglycerides. The haemolymph samples were used for determination of glucose, total proteins, total lipids, and triglycerides. Statistical analysis revealed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crayfish; Lipids; Triglycerides; Glucose; Proteins.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000300010
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The burrows of Parastacus defossus (Decapoda: Parastacidae), a fossorial freshwater crayfish from southern Brazil Rev. Bras. Zool.
Noro,Clarissa K.; Buckup,Ludwig.
Parastacus defossus Faxon, 1898 is a fossorial crayfish species, which constructs its burrows in swampy areas in southeast Uruguay and in the state of Rio Grande do Sul, Brazil. The present field study was carried out in Lami, Porto Alegre, Rio Grande do Sul, Brazil, from May 2003 through August 2005. Environmental measurements (temperature, pH, dissolved oxygen, and water-table depth) of the water in the galleries were made monthly. Burrow morphology was analyzed by means of resin and gypsum casts. The spatial distribution and changes in the number and shape of the surface openings over time were observed in a 100 m² area. To estimate the spatial distribution of the openings, the observed distribution was compared with the expected distribution predicted...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Burrow morphology; Crayfish; Galleries.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000300004
Registros recuperados: 8
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