No abstract

Ovigerous females of the estuarine crab Chasmagnathus granulata were exposed to 0.05, 0.1, 0.5, and 3 mg/L of copper during the egg incubation period. Regarding egg loss, a higher effect was observed at higher copper concentrations: 80% of the females lost their eggs at 0.5 mg/L, whereas no hatching was seen in those exposed to 3 mg/L. A significant decrease was found in the number of hatched larvae in females exposed to 0.5 mg/L, as was a significant decrease in the duration of the incubation period. In addition, several morphological abnormalities were seen and observed. Hydropsy and atrophy of the dorsal spine, pleon, and maxillipeds occurred at the higher copper concentrations, as found in previous studies with other pollutants. Hyperpigmentation of the cephalothorax and pleon was the only abnormality observed at every concentration assayed. Hypopigmented eyes were also evident. This pathology showed that among all defects observed at 0.5 mg/L, hypopigmented eyes had the highest incidence and might be a specific response to copper.

El uso de plantas medicinales ha sido de gran importancia desde la antigüedad en todas las culturas. En Ecuador, la población aún usa de forma habitual plantas de forma terapéutica, como es el caso de los habitantes de Muisne, cantón localizado en la provincia de Esmeraldas. En esta investigación se realizó el estudio farmacognóstico preliminar de dos especies nativas de Esmeraldas (Ocimum micranthum y Eupatorium odoratum), a través de su análisis macromorfológico, micromorfológico, pruebas fisicoquimicas cualitativas y cuantitativas. Además, se llevó a cabo el estudio etnobotánico de estas especies. Se evidenció cualitativamente que Ocimum micranthum presenta aceites, saponinas, lactonas, cumarinas, triterpenos, esteroides, azúcares reductores, resinas, aminoácidos libres o aminas y mucílagos. En el caso de Eupatorium odoratum presentó aceites, grasas, resinas, azúcares reductores, aminoácidos libres, mucílagos triterpenos y esteroides. En consecuencia, estas dos especies presentan un potencial destacable para posteriores estudios farmacológicos.

Ovigerous females of the estuarine crab Chasmagnathus granulata were exposed to 0.05, 0.1, 0.5, and 3 mg/L of copper during the egg incubation period. Regarding egg loss, a higher effect was observed at higher copper concentrations: 80% of the females lost their eggs at 0.5 mg/L, whereas no hatching was seen in those exposed to 3 mg/L. A significant decrease was found in the number of hatched larvae in females exposed to 0.5 mg/L, as was a significant decrease in the duration of the incubation period. In addition, several morphological abnormalities were seen and observed. Hydropsy and atrophy of the dorsal spine, pleon, and maxillipeds occurred at the higher copper concentrations, as found in previous studies with other pollutants. Hyperpigmentation of the cephalothorax and pleon was the only abnormality observed at every concentration assayed. Hypopigmented eyes were also evident. This pathology showed that among all defects observed at 0.5 mg/L, hypopigmented eyes had the highest incidence and might be a specific response to copper.