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Gonad development in females of fiddler crab Uca rapax (Crustacea, Brachyura, Ocypodidae) using macro and microscopic techniques Iheringia, Sér. Zool.
Castiglioni,Daniela da Silva; Negreiros-Fransozo,Maria Lucia; Greco,Laura S. López; Silveira,Aron F.; Silveira,Sérgio O..
The morphology of the ovaries in Uca rapax (Smith, 1870) was described based on macroscopic and microscopic analysis. Females were collected in Itamambuca mangrove, Ubatuba, state of São Paulo, Brazil. In the laboratory, 18 females had their ovaries removed and prepared for histology. Each gonad developmental stage was previously determined based on external and macroscopic morphology and afterwards each stage was microscopically described. The ovaries of U. rapax showed a pronounced macroscopic differentiation in size and coloration with the maturation of the gonad, with six ovarian developmental stages: immature, rudimentary, developing, developed, advanced and spent. During the vitellogenesis, the amount of oocytes in secondary stage increases in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Macroscopic analysis; Histological analysis; Oogonias; Primary and secundary oocytes; Uca rapax.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000400022
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Microarchitectural Adaptations in the Stomach of African Tree Pangolin (Manis tricuspis) International Journal of Morphology
Ofusori,D. A; Caxton-Martins,E. A; Keji,S. T; Oluwayinka,P. O; Abayomi,T. A; Ajayi,S. A.
The microarchitecture of the pangolin's stomach favouring the high chitinous diet has been less waived into, despite extensive morphological investigations. Histological analysis of the microanatomy will provide powerful tools for interpretation to yield reliable insights. We investigated this by fixing the tissues in 10% formol saline for histological analysis. Serial sections at 5 µm thickness were subjected to general staining methods for lightmicroscopic study (Haematoxylin and eosin, Van Gieson's and Verhoeff's). The results revealed basic structural arrangements in their coats, with a modification of the epithelial lining of cardia and fundus into stratified squamous keratinized epithelium. These modifications were also reflected in the distribution...
Tipo: Journal article Palavras-chave: Stomach; Microarchitecture; Histological analysis; Diet; Coats.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000300031
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Morphology of the urogenital papilla and its component ducts in Astyanax altiparanae Garutti & Britski, 2000 (Characiformes: Characidae) Neotropical Ichthyology
Siqueira-Silva,Diógenes Henrique de; Silva,Amanda Pereira dos Santos; Ninhaus-Silveira,Alexandre; Veríssimo-Silveira,Rosicleire.
The histological description of the urogenital papilla is an important tool to comprehension of the reproductive mechanisms in fish, as well as a pre-requisite to germ cell transplantation in adult fish, besides to be a good biological indicator to environmental changes. Was performed the histological description of the urogenital papilla and its component ducts in the tetra Astyanax altiparanae. The genital and urinay ducts pass separately throughout most part of its extension, joining in a single duct before opening. In males this opening is asymmetric and seems to have double origin, being completely surrounded by striated muscle fibers, while in females it is symmetric and the muscle fibers does not surround it totally. Spermatic duct and oviduct...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish reproduction; Histological analysis; Oviduct; Sperm duct; Urinary duct.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000200309
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Rabbit antivenom efficacy against myotoxic and neurotoxic activities of Bothrops jararacussu venom and bothropstoxin-I J. Venom. Anim. Toxins
Oshima-Franco,Y.; Leite,G. B.; Valério,A. A.; Hyslop,S.; Andriao-Escarso,S.; Giglio,J. R.; Prado-Franceschi,J.; Cruz-Höfling,M. A.; Rodrigues-Simioni,L..
Bothrops jararacussu venom and its major toxin bothropstoxin-I (BthTX-I) possess myotoxic and neurotoxic properties. The efficacy of a rabbit antivenom raised against B. jararacussu venom in the neutralization of physiological, biochemical, and morphological changes induced by the venom and its major toxin BthTX-I was studied in mouse isolated phrenic nerve-diaphragm (PND) and extensor digitorum longus (EDL) preparations. The times required for 50% neuromuscular blockade in PND and EDL preparations for venom were 70+11.5 (S.E.M., n=5) min and 58+8 (n=16) (50 mu g/mL), and for BthTX-I 31+6 (n=3) min and 30+3 (n=5) min (20 mu g/mL), respectively. After 120 min incubation, creatine kinase (CK) concentrations in solution containing the EDL preparations were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bothrops venom; Myotoxin; Neutralization; Neuromuscular junction; Histological analysis; Bothrops jararacussu.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302002000200004
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The effect of sub-lethal doses of Azadirachta indica (Meliaceae) oil on the midgut of Spodoptera frugiperda (Lepidoptera, Noctuidae) Rev. Bras. entomol.
Roel,Antonia Railda; Dourado,Doroty M.; Matias,Rosemary; Porto,Karla R. A.; Bednaski,Aline V.; Costa,Reginaldo B. da.
The fall armyworm, Spodoptera frugiperda, is one of the major field pests for maize production. It is mainly controlled by means of synthetic, and more recently by resistant cultivar of maize expressing Bt toxins. The neem tree, Azadirachta indica, is a plant that can potentially control insects with the advantage of being food and environmental safe. The aim of this study was to assess the effect of neem oil on the development and survival of S. frugiperda caterpillars by assessing histological alterations caused on their midgut. Newly hatched caterpillars were submitted to three neem oil concentrations: 0.006; 0.05; 0.4%, which were added to their artificial diet. Ten 3rd instar caterpillars, taken from each treatment, were submitted to histological...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fall armyworm; Histological analysis; Insecticidal plants; Neem.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262010000300024
Registros recuperados: 5
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