--This study examined habituation of the predator inspection behavior in the guppy (Poecilia reticulata) and its relationship with boldness (open field locomotion). Two different strategies were discovered: (1) initial inspection of a predatorlike fish, correlated with boldness; (2) subsequent surveillance, governed by a random underlying process and unrelated with boldness. The surveillance in...

Abstract The purpose of this study was to determine the type and level prevalence intensity ectoparasites that infect mud crabs ( Scylla serrata ) in Asahan district. method data collection carried out by field observation methods sea silos, Pematang Baru, Sei Kepayang areas. crab samples observed were live crabs, number taken for sample 10% each population. Furthermore, carapace, parasite atta...

El objetivo de este estudio fue analizar el crecimiento inicial a mediano plazo un asentamiento P. reticulata bajo diferentes dosis fósforo. experimento se llevó cabo en área del Bosque Atlántico, Sooretama, norte estado Espírito Santo, Brasil. Se probaron cinco P por árbol (0 g, 27 47 67 g y 87 g) diseño bloques al azar con tres repeticiones 18 plantas parcela. A los 3 meses, 9 meses 15 midió ...

Following behaviour among Neotropical stream fishes have been scarcely reported. This type of feeding association was observed in a small stream in the upper rio Paraná system between the catfish, Aspidoras fuscoguttatus, acting as a nuclear species, and Knodus moenkhausii, Poecilia reticulata, and Astyanax altiparanae as follower species. Aspidoras fuscoguttatus individuals dug in the bottom d...

Oil-resin fractions from Copaifera reticulata Ducke (Leguminosae-Caesalpinoideae) were evaluated for larvicidal activity on third larval instars of Aedes aegypti, in searching for alternative control methods for this mosquito. The bioactive fractions were chemically monitored by thinlayer chromatography, H and C nuclear magnetic resonance and mass spectrometry. Bioassays were performed using fi...

Antioxidant potential of leaves of three different species of Annona was studied by using different in vitro models eg., 1,1-diphenyl-2-picryl hydrazyl (DPPH), 2,2-azinobis-(3-ethylbenzothizoline-6-sulphonate) (ABTS), nitric oxide, superoxide, hydroxy radical and lipid peroxidation. The ethanolic extract of A. muricata at 500 microg/ml showed maximum scavenging activity (90.05%) of ABTS radical...