10 research outputs found
Premature Sperm Activation and Defective Spermatogenesis Caused by Loss of spe-46 Function in Caenorhabditis elegans
10.1371/journal.pone.0057266PLoS ONE83e5726
Does risk of sperm competition predict men’s interest in their partner’s copulatory orgasm?
Maintenance of androdioecy in the freshwater shrimp, Eulimnadia texana: do hermaphrodites need males for complete fertilization?
Aspectos da predação entre larvas de Chrysoperla externa (Hagen, 1861) e Ceraeochrysa cubana (Hagen, 1861) (Neuroptera: Chrysopidae) em laboratório Predation among Chrysoperla externa (Hagen, 1861) and Ceraeochrysa cubana (Hagen, 1861) (Neuroptera: Chrysopidae) larvae under laboratory conditions
Objetivou-se no presente trabalho estudar aspectos da predação entre larvas de Chrysoperla externa e Ceraeochrysa cubana, sob condições de laboratório, verificando a sobrevivência desses predadores nos diferentes ínstares, quando mantidos nas proporções de 1:1, 2:2 e 3:3. De modo geral, C. externa apresentou maior sobrevivência, independente do ínstar e da proporção de adensamento entre indivíduos. Ao contrário, C. cubana foi fortemente afetada pela interação com C. externa, tendo sua capacidade de sobrevivência reduzida com o aumento da proporção de adensamento e com o desenvolvimento larval. No final da fase larval, verificou-se uma taxa de sobrevivência próxima a 96, 90 e 95%, e 56, 23 e 9% para C. externa e C. cubana nas proporções de 1:1, 2:2 e 3:3 indivíduos, respectivamente.<br>This work aimed to study aspects of predation among Chrysoperla externa and Ceraeochrysa cubana larvae under laboratory conditions. The survival of those predators in different larval stages was studied, maintaining the larvae grouped in proportions of 1:1, 2:2 and 3:3 individuals. C. externa presented higher survival rates, independently of larval ínstar and density proportion among individuals. On the other hand, C. cubana was strongly affected by interaction with C. externa, and had its survival capacity reduced with the increase of grouping proportion and larval development. At the end of larval phase, a survival rate around 96, 90, and 95 and 56, 23 and 9% for C. externa and C. cubana in proportions of 1:1, 2:2 and 3:3 individuals, respectively, was verified