Erika A.A. Santos

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Fucan is a term used to denote a family of sulfated L-fucose-rich polysaccharides which are present in the extracellular matrix of brown seaweed and in the egg jelly coat of sea urchins. Plant fucans have several biological activities, including anticoagulant and antithrombotic, related to the structural and chemical composition of polysaccharides. We have(More)
Effects of the crustacean hyperglycemic hormone on total lipids in the hemolymph of Chasmagnathus granulata and on free fatty acids, phospholipids, and triglycerides in the hemolymph of Carcinus maenas, as well as on their release by Orconectes limosus hepatopancreas in vitro, were investigated. Eyestalk ablation led to a significant decrease of total(More)
Histopathological effects of ammonia on the gills of the estuarine crab Chasmagnathus granulata (Dana, 1851) were evaluated after acute exposure to ammonia concentrations around LC(50) value (17.85 Mm). Disruption of pilaster cells and a subsequent collapse of gill lamellae were the main effects observed. Epithelial necrosis and hyperplasia were also(More)
The present study analysed the response of adult female capybaras (Hydrochaeris hydrochaeris) to different dietary supplementation in relation to litter size per parturition and oestradiol secretion profile during pregnancy and the oestrous cycle. All four experimental groups received 'camerum' grass (Pennisetum purpureum) and water ad libitum and three of(More)
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(More)
Sousa P.C., Santos E.A.A., Souza A.L.P., Lima G.L., Barros F.F.P.C., Oliveira M.F. & Silva A.R. 2013. Sperm morphological and morphometric evaluation in captive collared peccaries (Pecari tajacu). Pesquisa Veterinária Brasileira 33(7):924-930. Laboratório de Conservação de Germoplasma Animal, Universidade Federal Rural do Semi-Árido, BR 110 Km 47,(More)
The effect of crustacean hyperglycemic hormone (CHH) was investigated on the hemolymph of Chasmagnathus granulata, a meso-supralittoral crab from southern Brazil. Serum glucose increased significantly (P less than 0.05) after incubation of total hemolymph in the presence of the eyestalk extract of a member of the same species. Also, glucose uptake from(More)
The effects of purified crustacean hyperglycemic hormones (CHH) from Carcinus maenas or Orconectes limosus, and of eyestalk extract of Chasmagnathus granulata on the blood and muscle glucose and glycogen concentration of Chasmagnathus granulata were investigated. Different groups of animals (at least 7 animals per group) were injected with CHH from either(More)
Intertidal decapods regulate their blood glucose with a significant but transitory (60 min) increase upon exposure to atmospheric air, and this has been considered to be an adaptative response related to the almost complete lack of the Pasteur effect in facultative anaerobes. In these animals we would not observe an increase in substrate availability to(More)
1. We have studied the effect of bilateral eyestalk ablation on the heart rate (HR) of a crab. Recordings of the heart rate of normal and eyestalkless Chasmagnathus granulata, a meso-supralittoral crab from southern Brazil, were obtained starting 1 h after electrode implantation for 44 and 144 h, respectively. 2. The time required for HR stabilization was(More)
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