Biological aspects of Amblyomma brasiliense (Acari: Ixodidae) under laboratory conditions

Although Amblyomma brasiliense Aragão 1908 has been reported as one of the most aggressive ticks to humans in Brazil, information about the biology of this tick species is virtually inexistent. This work reports data on the life cycle of A. brasiliense fed on rabbits and pigs and maintained in an incubator at 20°C, 90% RH and 12 h of light for off-host development. Tick yield of adult females fed on pigs and rabbits was 81.2% and 58.3%, respectively. Females fed on pigs had mean engorgement weight of 862.3 mg and egg mass of 208 mg, while females fed on rabbits had mean engorgement weight of 606.1 mg and egg mass of 160 mg; these values did not differ statistically between host species. Feeding period of female ticks fed on pigs (10 days) was significantly shorter than that on rabbits (17 days). Mean preoviposition period was slightly longer (35.9 days) for ticks fed on pigs than on rabbits (30 days). The minimum incubation period of eggs of ticks from both host species was similar and over 100 days. Egg production efficiency was low for females fed on both hosts (less than 30% and 20% for ticks from pigs and rabbits, respectively). More than 55% of larvae and 79% of nymphs fed on rabbits, set free inside the feeding chambers, engorged successfully. These ticks attained an engorgement weight of 1.3 and 18.2 mg, respectively, and fed for approximately 5 days. The minimum pre-molt period was 30 days for engorged larvae and over 44 days for nymphs. Molting success was low, less than 50% in the case of larvae and less than 20% for nymphs. Further studies are required to better determine the off-host requirements of this tick species. © 2008 Springer Science+Business Media B.V.

Efeito dos níveis de triptofano digestível em dietas para codornas japonesas em postura

The adequate level (0.12, 0.16, 0.20, 0.24, and 0.28%) of the dietary digestible tryptophan was evaluated in 400 laying Japanese quail from 21 to 30 weeks old. The animals were housed in laying cages, with initial weight of 158.50 g and egg production average of 84.50%. A completely randomized blocks design, with eight blocks, five diets, eight replicates of ten birds per replicate and three experimental periods of 21 days each was used. Feed intake (g/bird/day), digestible tryptophan intake (mg/bird/day), egg production (%/bird/day), egg weight (g), egg mass (kg/bird/day) and feed conversion (kg feed intake per kg eggs and dozen eggs) were the characteristics evaluated. Only the characteristics digestible tryptophan intake and egg production rate show significant effects of digestible tryptophan levels in the diets. Performance response of the Japanese quails in posture, regarding the adjustment obtained through models of linear regression and broken-line regression model, and the biological interpretation, allow to conclude that to obtain the best productive performance, the Japanese quails diets should contain the level of 0.21% digestible tryptophan, that results in a daily intake of 45.0 mg/ bird of digestible tryptophan, corresponding to the digestible tryptophan: digestible lysine ratio of 21%. © 2008 Sociedade Brasileira de Zootecnia.

Biologia de Tenuipalpus heveae Baker (acari, Tenuipalpidae) em três clones de Fevea brasileinsis Muell. Arg. (Euphorbiaceace)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação de diferentes programas de restrição alimentar para matrizes pesadas

Pós-graduação em Zootecnia - FCAV

Podisus nigrispinus (Dallas, 1851) (Hemiptera: Pentatomidae): efeito do alimento e da temperatura de armazenamento de ovos no desenvolvimento do inseto

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Aspectos biológicos de Cycloneda sanguinea (L.) (Coleoptera: Coccinellidae) e de Aphis gossypii Glover (Hemiptera: Aphididae), criados nas cultivares DeltaOPAL e NuOPAL (Bollgard I)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Características biológicas de Orius insidiosus alimentado com Aphis gossypii em algodão transgênico e convencional

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Requisitos nutricionais e reprodução massal de Bipolaris euphorbiae

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação de microminerais orgânicos no desempenho reprodutivo de matrizes pesadas e respostas da progênie

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Suplementação de ração de codornas com selênio, zinco e manganês de fonte orgânica

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Comportamento de casais Rhynchotus rufescens em cativeiro: relação com imobilidade tônica e eficiência reprodutiva

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Mn, Zn e Se associados a moléculas orgânicas na alimentação de galinhas poedeiras no segundo ciclo de produção

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Caracterização quantitativa e qualitativa dos resíduos em sistemas de produção de ovos: compostagem e biodigestão anaeróbia

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Histologia e ultra-estrutura dos ovários nas castas de alguns meliponíneos: um estudo comparado

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

Co-digestão anaeróbia de dejetos de bovinos e dois tipos de glicerina bruta

Pós-graduação em Agronomia (Energia na Agricultura) - FCA