Intro - BIO 181 Dr. Sweat Introduction Sea urchins...

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BIO 181 Dr. Sweat Introduction Sea urchins (Echinometra vanbrunti) are small, invertebrate marine animals belonging to the phylum Echinodermata and are common among seashores on both the Pacific and Atlantic coasts, as well as in the Gulf of Mexico. Noted for their shape and symmetry, sea urchins have a fertilization process similar to humans, making them prime candidates for the observation and study of embryological evolution. When observing these organisms, it’s important to determine specific conditions that can effect sexual reproduction and gamete production. In one study, embryos and larvae of the Antarctic sea urchin, Sterechinus neumayeri, were examined to determine salinity tolerance. Direct observations of individual embryos at the low salinity treatments revealed that most did not develop (Cowart et al, 2009). Although many factors that control reproduction are well understood, several components are still uncertain. When the T. gratilla species were examined, it was concluded that seawater temperature and light are probably not
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Intro - BIO 181 Dr. Sweat Introduction Sea urchins...

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