Determinaciòn de la toxicidad aguda cl50 con plomo en juveniles de camarón litopenaeus vannamei y alevines de tilapia roja oreochromis sp

The sources of pollution of coastal areas and the sea should occupy today so prominent a position in environmental issues. The alteration and destruction of habitat, human health effects, the decline in fish stocks and other living resources, are aspects relating to fixed and diffuse sources of pollution from activities taking place in land and the effect water harvesting in watersheds. This study evaluated the toxicity of lead nitrate (NO3)2Pb into two species, red tilapia fingerlings (Oreochromis sp) and post larval shrimp (Litopenaeus vannamei), both of great importance and commercial interest. For this Bioassays with different concentrations of compound and counted the number of organisms or dead affected immobility. Data were entered and processed using the statistical computing Probit, which allowed for a comparison of the degree of sensitivity of different species of lead nitrate, which has caused environmental problems of great importance in our country, affecting even the human population. In this research the dosage of lead nitrate were subjected to red tilapia fingerlings (Oreochromis sp.), Found that the median lethal concentration (LC50) according to Probit analysis occurred in 0.68 mg/l (NO3)2Pb, at this dose giving the highest percentage of dead fish. The median lethal concentration (LC50) of lead nitrate fed to shrimp postlarvae (Litopenaeus vannamei), was determined by Probit statistical analysis that the killing dose was at 0.58 mg/l (NO3)2Pb determined by the greatest number of dead animals.

• 主要作者: Abarca Agila, Edgar Dario (author)
• 格式: bachelorThesis
• 语言: spa
• 出版: 2014
• 主题: HÁBITAT; CUENCAS HIDROGRÁFICAS; TOXICIDAD; ALEVINES
• 在线阅读: http://repositorio.utmachala.edu.ec/handle/48000/1988