Arctic sea urchin reproduction is highly sensitive to climate change, particularly warming waters. A new study shows ...

Researchers have identified a key enzyme in sea urchin egg fertilization. Working on two species of urchins, Strongylocentrotus purpuratus and Lytechinus variegatus, Gary Wessel and others at Brown ...

ELECTRON microscopy has provided evidence for a series of anatomically distinct stages in the process of fertilization. In the polychaete worm Hydroides hexagonus, Colwin and Col win 1,2 have ...

This is a preview. Log in through your library . Abstract Changes in the topography of the sea urchin egg after fertilization were studied by scanning and transmission electron microscopy.

For many years scientists have believed they understood how closely related species that occupy the same regions of the ocean were kept from interbreeding. It turns out they were only seeing part of ...

For sea urchins, sex is an out-of-body experience. And in external fertilization, species-specific gamete receptors serve as one way to prevent cross-fertilization. The discovery of an egg protein ...

The male red sea urchin, Strongylocentrotus franciscanus, spawning off the coast of Bamfield, British Columbia. Field experiments demonstrated that the rate of evolution in gamete recognition proteins ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Sperm have a unique sense of direction. The reproductive cells of ...

Sea urchin gametes predominate in molecular studies of fertilization, yet relatively little is known of the subcellular aspects of sperm entry in this group. Accordingly, it seemed desirable to make a ...

Consider the sea urchin. Specifically, the painted urchin: Lytechinus pictus, a prickly Ping-Pong ball from the eastern Pacific Ocean. The species is a smaller and shorter-spined cousin of the purple ...