ECHINOCHROME, A RED SUBSTANCE IN SEA URCHINS

Red sea urchins ( Strongylocentrotus franciscanus ) can live over 100 years : confirmation with A - bomb 14 carbon

Red sea urchins (Strongylocentrotus Walters, 1992; Congdon et al., 1994; franciscanus) along the west coast of Ebert, 1998). There is also the need to North America, like most large sea understand the evolution of life histourchins in temperate waters worldries of species where long life tends to wide, are the focus of a commercially be an indicator of uncertainty in indiimportant fishery. In a...

Can sea urchins beat the heat? Sea urchins, thermal tolerance and climate change

The massive die-off of the long-spined sea urchin, Diadema antillarum, a significant reef grazer, in the mid 1980s was followed by phase shifts from coral dominated to macroalgae dominated reefs in the Caribbean. While Diadema populations have recovered in some reefs with concomitant increases in coral cover, the additional threat of increasing temperatures due to global climate change has not ...

Pentamerism and Modularity in Sea Urchins

Evolutionary crossroads in developmental biology: sea urchins.

Embryos of the echinoderms, especially those of sea urchins and sea stars, have been studied as model organisms for over 100 years. The simplicity of their early development, and the ease of experimentally perturbing this development, provides an excellent platform for mechanistic studies of cell specification and morphogenesis. As a result, echinoderms have contributed significantly to our und...

Species-specific Sperm Adhesion in Sea Urchins

Bindin, a protein component of the acrosomal vesicle of sea urchin sperm, has been isolated from Arbacia punctulata and Strongylocentrotus purpuratus . Using this isolated bindin, we have devised a quantitative assay for bindin-mediated egg agglutination and compared the agglutination of bindin and eggs from A . punctulata and S. purpuratus . Bindin-mediated agglutination is species-specific in...