Results 101 to 110 of about 417 (152)

Impacts of larval environment on the adult dispersal syndrome

open access: yes
Legrand D   +4 more
europepmc   +1 more source
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Recruitment pattern of Diadema antillarum in La Parguera, Puerto Rico

Coral Reefs, 2010
Recruitment success is one of the factors that may be influencing the slow population recovery of Dia- dema antillarum at many locations in the Caribbean. D. antillarum recruitment was measured with recruitment plates at monthly intervals from September 2005 to Sep- tember 2006 at three reefs along an inshore-offshore gra- dient in La Parguera, Puerto ...
S. M. Williams   +2 more
exaly   +2 more sources

Phenolases in the Echinoid, Diadema antillarum Philippi

Nature, 1951
Diadema antillarum possesses an abundant black pigment which shows the chemical and histochemical properties of melanin, and is concentrated in epidermal chromatophores1. In view of much evidence from other forms of a relationship between the occurrence of melanin and phenolases, evidence of such enzymes in Diadema was sought.
N, MILLOTT, F W, JACOBSON
openaire   +2 more sources

Protracted recovery of long-spined urchin (Diadema antillarum) in the Bahamas [PDF]

open access: possibleCoral Reefs, 2022
In 1983–1984, an unknown waterborne pathogen caused the mass mortality of long-spined sea urchin (Diadema antillarum) across the Caribbean and western tropical Atlantic. After approximately 15 years, urchin populations began to recover at some locations, yet few have reached pre-mortality densities.
Timothy J. Pusack   +6 more
openaire   +1 more source

Alarm Response of Diadema antillarum

Science, 1970
Diadema antillarum possesses a sensitive escape response to juices of crushed conspecific sea urchins. Stimulation usually results in urchins moving rapidly downcurrent. Strong species specificity of the response suggests that it is an adaptation to reduce predation. Diadema antillarum also responds with
N, Snyder, H, Snyder
openaire   +2 more sources

Recruitment-limitation in open populations of Diadema antillarum: an evaluation

Oecologia, 1990
Empirical evidence from studies of the sea urchin Diadema antillarum suggests that this organism widely disperses its offspring, that both recruitment and mortality rates are independent of local densities, and that local food availability does not regulate local population sizes.
Ronald H, Karlson, Don R, Levitan
openaire   +2 more sources

Pigmentation in the Radial Nerve of Diadema antillarum

Nature, 1968
RECENT examination by phase-contrast microscopy of teased, fresh or macerated radial nerve, or of frozen sections in Diadema antillarum, has shown the presence of reddish cells that are neither amoebocytes nor chromatophores, but which resemble neurones in their general form (Figs. 1 and 2).
N. MILLOTT, H. OKUMURA
openaire   +1 more source

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