Résumé:
Our work is around the study of the evaluate the quality of sea water of bay of Algeria and this biological indices sea urchins Paracentrotus lividus that live in wilaya of Algeria “Mediterranean sea“characterized substrate rocky rich in seaweed but disturbed by pollution rejections urban and industrial and strong activity of port
In this work we take the samples at the level of Alger beach and the author samples we take at the level of site of Sidi Fredj, the tow types of biotopes located in area at strong activity anthropogenic.
After the fertilization of sea urchins at the level of laboratory and we following the development larval of sea urchins and with special conditions indicated that the biotope of beach of Alger is the more disturbed because the development larval of sea urchins is low on the other the site of Sidi Fredj the development larval of sea urchins is the strong because the sea water and the sediment of this site give the favorable conditions to the sea urchins for his development larval.
