Notes on the biology of the echinoid Diadema antillarum. 833). 4(2&3): 421-433. In 1983 to 1984, Diadema antillarum underwent mass mortality, thought to be due to a water-borne pathogen that has not yet been identified, with more than 97% of the population dying. & Lessios, H. A.

Histological analysis showed that D. aff. (1964).

University of Michigan. In a field experiment, small (27.5 mm test diameter) and large (37.5 mm) urchins were placed in cages at low (12 individuals/m 2 ) and high (24 individuals/m 2 ) densities. Museum of Zoology. antillarum during the years 2004-2005, in urchin barrens and grazing fronts at two sites along the coast of the Canary Islands. Randall, J.E, Schroeder, R.E and Starck II, W.A.

... Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae. Caribbean Journal of Science.

16. Diadema setosum (Leske, 1778) porcupine sea urchin Native range ... Life cycle: Embryos develop into planktotrophic larvae (echinoplateus) and live for several months before they sink to the bottom using their tube feet to adhere on the ground where they metamorphose into young urchins (Ref. Diadema antillarum, Long- Spined sea urchin. antillarum has an The mucous coating of the spines, normally used to kill organisms that live in the spines, carries a mild poison that also aids in deterring smaller predators. Diadema antillarum (Philippi, 1845) long-spined sea urchin Upload your photos | All pictures | Google image | Diadema antillarum Picture by Poppe, Guido and Philippe. Author: Dahryn A. Augustine Posted online: 2016 Annual reproductive periodicity of the sea urchin Diadema antillarum Philipp i in the Canary Islands Bulletin of Marine Science 67, 989–996 (2000). This study demonstrates that the sea urchin Diadema antillarum has the ability to adjust body size quickly (by positive or negative growth) to a resource— or density—dependent level. Abstract We monitored the reproductive cycle of Diadema aff.