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The study of population and reproductive traits provides information about the ecological structure of natural populations. This study aimed to characterize dynamics and reproductive traits of Hyalella palmeirensis from a natural pond from southern Brazil. The amphipods were sampled monthly (August 2012 to July 2013) by a person with the aid of a hand net for 20 minutes. Ovigerous females and pre-copulatory pairs were individualized in the field. A total of 12,325 individuals were sampled, being 1,421 males, 6,983 females (including 215 ovigerous females) and 3,921 juveniles. Paired and unpaired males were significantly greater in size than females. There was a positive correlation between body size (CL) of paired males and females. Males and females showed bimodal distribution. Total sex ratio favored females, and these were more frequent in almost all months. Ovigerous females and precopulatory pairs were found throughout the year, but with high frequency in winter and autumn, respectively, characterizing a seasonal reproduction. Juveniles were sampled throughout the year, with greater intensity in the spring. The mean fecundity was 19.6 ± 4.34 eggs. No reduction in the number of eggs was observed during embryonic development. The results observed in H. palmeirensis demonstrate that this species has a population and reproductive dynamics very similar to other species of Hyalella already analyzed in southern Brazil. Moreover, it can be seen that although the H. palmeirensis occurs in an environment with anthropic influence (soy cultivation,) the population is managing to remain in the area, with reproduction and recruitment in most months of year.

La investigación, tiene como objetivo principal establecer de qué forma el robo agravado se relaciona con la muerte subsecuente cometido por adolescente infractor en el 1° Juzgado de Familia del Distrito Judicial del Callao, 2019. Este estudio se ha llevado a cabo mediante un enfoque cuantitativo, tipo básico, empleando el método descriptivo, de diseño no experimental, utilizando la técnica de la encuesta, logrando aplicarse dicha técnica a 63 personas que viven en el Distrito del Callao. Los resultados de las encuestas indican que el 58,7% consideran que los niveles de robo agravado se han incrementado y el 55,7% tiene conocimiento que la mayor cantidad de muertes son cometidas por adolescentes infractores en dicho distrito, lo cual revela la correlación que existe entre ambos niveles.