Size at maturity of Atlantoraja platana (Gunther, 1880) (Chondrichthyes : Rajidae : Arhynchobatinae) in the south-west Atlantic Ocean

The sexual development of Atlantoraja platana from the south-west Atlantic Ocean was analysed. According to the reproductive variables considered for both sexes, males were found to mature at 620 mm and females at 715 mm total length. (c) 2008 The Authors Journal compilation (c) 2008 The Fisheries Society of the British Isles.

Atracción de la edad en los censos de los Estados Unidos: 1880-1950

Incluye Bibliografía

Cellular responses in the Malpighian tubules of Scaptotrigona postica (Latreille, 1807) exposed to low doses of fipronil and boric acid

Studies of sub-lethal effects of pesticide residues on stingless bees are scarce and morphological analysis of organs would add information to toxicological analysis in order to clarify the continuous exposure of Scaptotrigona postica to insecticides. The aim of this study was to evaluate the morphology and histochemistry of the Malpighian tubules (excretory organ) of S. postica exposed to fipronil or boric acid to detect cellular responses that indicate toxicity or adaptative mechanisms to stress induced by exposure of worker bees to low doses of these chemical compounds. Newly emerged bees were submitted to toxicological bioassays and morphological analyses by optical microscopy and Transmission Electron Microscopy, as well as histochemical methods, were performed to detect proteins and glycoconjugates. Additionally, immunohistochemical detection of DNA fragmentation and HSP70 (70-kDa Heat shock protein) were performed to detect cell death and stress response, respectively. Statistical analysis, for the bioassays conducted with ingestion of contaminated diet with boric acid at 0.75% (w/w) or with fipronil at 0.1μg/kg of food, showed that the survival of bees that ingested the contaminated diets were significantly different to the survival rate presented by the control group (P<0.0001). Although some characteristics indicative of initiation of cell death were observed, the cells remained metabolically active in the processes of excretion and inactivation of chemical compounds. The data from this study reinforce the importance of research on sublethal effects of low doses of pesticides on bees in an attempt to assess a possible realistic dose and evaluate the risk assessment of stingless bee S. postica foraging in the vicinity of cultivated fields and/or in green urban areas. © 2013 Elsevier Ltd.

Niveles de orfandad y medición de la mortalidad adulta en poblaciones del pasado: el caso de los Países Bajos (La Haya, 1850-1880)

Incluye Bibliografía

Avaliação dos efeitos do inseticida imidacloprido para abelhas sem ferrão Scaptotrigona postica Latreille, 1807 (Hymenoptera, Apidae, Meliponini): Hellen Maria Soares. -

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Simulation on the effect of mortality differentials by parity on proportions orphaned using data from The Hague 1870-1880

Includes bibliography

Estimativas de mortalidade adulta no grupo evangelico luterano em Curitiba: 1880-1919

Incluye Bibliografía

Levels of orphanhood and measurement of adult mortality in populations of the past: the case of the Netherlands (The Hague 1850-1880)

Includes bibliography

Análise morfológica e histoquímica do corpo gorduroso e dos túbulos de Malpighi de operárias adultas de Scaptotrigona postica (Latreille, 1807) (Hymenoptera, Apidae) tratadas com fipronil e ácido bórico

Pós-graduação em Ciências Biológicas (Biologia Celular e Molecular) - IBRC

Crise monárquica e as experiências de República no município de Franca (1880-1906)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Conflitos e tensões: conquistas de escravizados e libertos no sul da Bahia, 1880-1900

Pós-graduação em História - FCHS

Carlos Octavio Bunge e José Ingenieros: entre o científico e o político : pensamento racial e identidade nacional na Argentina (1880 – 1920)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Clíticos pronominais no português de São Paulo: 1880 a 1920: uma análise sócio-histórico-linguística

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Nas páginas da imprensa: a instrução/educação nos jornais em Mato Grosso (1880-1910)

Pós-graduação em Educação Escolar - FCLAR