ISSN: 7027-2221

Author : R.Hassan, Hadi

Ecological factors affecting on eggs development and life span of meracidia of Fasciola gigantica

Moayad M. Al-jibouri; Hadi R.Hassan; Sabeeh H. Al-Mayah

karbala journal of pharmaceutical sciences, Volume 1, Issue 1, Pages 74-80

This study was carried out during the period from February to August 2008 at the laboratories of Biology dep. ,College of Education , University of Karbala. The study involved the effect of temperature, sodium chloride, and pH on the period and the percentage of eggs development. The study involved also the effect of previous factors on the life span of meracidia . The percentage of developed eggs and the period of eggs development decreased significantly when the temperature increased. The optimal pH value for eggs developing was pH 7 while the developing declines significantly when pH less and more than pH 7. The study showed also that eggs developing declines significantly when sodium chloride increased.
Concerning of the life span of meracidia, the study revealed a significant decrease in the life span with temperature and sodium chloride increasing . The study showed also that the best pH value for the lifespan of meracidia was 7 , while it declines significantly when pH less and more than 7.