NITROGENOUS EXCRETION IN THE TROPICAL SEA URCHIN DIADEMA ANTILLARUM PHILIPPI

Open Access

1 February 1967

journal article
research article
Published by University of Chicago Press in The Biological Bulletin

Vol. 132 (1) , 34-37
https://doi.org/10.2307/1539875

Abstract

Diadema antillarum is ammonotelic in its excretion of nitrogenous waste products. It excretes approximately 60% of its total nonprotein nitrogen as ammonia and approximately 30% as amino acids. No urea, uric acid or other purine bases were found to be excreted. A progressive increase in tissue ammonia content in the intestine towards the rectum suggests that the hind gut has an excretory function.