ABSTRACT
Insects show morphometric variations associated with the environment that may be the result of phenotypic response or genetic inheritance, or both. Thereby, studies that emphasise the variability in body size are very useful for understanding the dynamics and the stability of ecological systems. Cornops aquaticum (Bruner, 1906) (Acrididae) is a semi-aquatic grasshopper, distributed from the southeast of Mexico to the south of Buenos Aires Province, Argentina, and is intimately associated with the aquatic macrophytes Eichhornia spp. and Pontederia spp. In its wide habitat distribution, C. aquaticum shows variations in its life cycle and morphometric differences that were observed suggesting geographic and host plant influence. Considering these findings, this study aimed to find out the morphometric characteristics of this species at the Pantanal of Poconé - MT, using the protocol of the project "HICWA - Host-Insect Coevolution on Waterhyacinth", as well as to assess possible differences in each stage of development between the sexes and among seasonal periods (flood, high water, low water and dry). During 12 months a total of 600 individuals were collected in monthly collections of 50 grasshoppers, and of this total, 261 were adults and 339 nymphs. The following measurements were taken: total length (A); body length (B); wing length (I) and measurement of the hind femur (H). The results showed that both male and female have different measurements but not correlated with seasonal periods. The average obtained for each character and the seasonality showed the highest values during the flood period. In nymphs, the measurement of the posterior femur presented the lower variation between individuals and characters.
Subject(s)
Grasshoppers/anatomy & histology , Animals , Brazil , Female , Grasshoppers/classification , Male , SeasonsABSTRACT
BACKGROUND: In order to foster the use of the Internet by our medical students, we devised a virtual test to be taken by the whole class during the Hematology-Oncology course given in the third year. MATERIAL AND METHODS: Through a specially designed home page in the Internet students were asked questions regarding their personal characteristics, knowledge of basic Internet skills and were also given a short virtual course on line on the use of the Internet. RESULTS: We noted that only 53% of our students had used the Internet before. The use of the Internet was correlated with having more members of the household accessing the net (p < 0.001) but not with the student's sex, age or family income. CONCLUSION: Most of the students reacted favourably to this educational experience through which about half of them got acquainted with the use of the Internet for the first time.
Subject(s)
Education, Medical/methods , Hematology/education , Internet , Medical Oncology/education , Adult , Computer Literacy , Computer-Assisted Instruction , Female , Humans , Male , Surveys and QuestionnairesABSTRACT
OBJETIVO: Com o intuito de estimular o uso da Internet pelos nossos estudantes de medicina, criamos uma prova virtual a qual se submeteu toda a classe durante o curso de Oncologia e Hematologia ministrado no 3o ano do curso médico. MATERIAL E MÉTODO: Através de uma página na Internet especialmente criada para esta prova, avaliou-se através de perguntas específicas dados pessoais, padrões de uso e conhecimentos básicos sobre o acesso à rede. Ofereceu-se ainda, dentro desta mesma página, um pequeno curso virtual sobre como utilizar a Internet. RESULTADOS: Notamos que apenas 53 por cento dos nossos alunos tinham usado a Internet antes da prova. O uso da Internet se correlacionou com a presença de outros usuários entre os membros da família (p < 0,001) mas não com sexo, idade ou renda familiar dos alunos estudados. CONCLUSÃO: A reação dos alunos a esta experiência educacional foi positiva sendo que através dela cerca da metade deles utilizou a Internet pela primeira vez.