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Latest Sea urchin Stories

2011-10-25 07:00:00

The Biology and Health Sciences Magazine Eurekamag.com publishes reviews on a wide range of topics within the basic and applied biological and health sciences. The latest inclusions in this collection of reviews is one on Abalone and one on Aneurysma (Aneurysm). Mannheim, Baden-Württemberg, Germany (PRWEB) October 25, 2011 The Science Magazine EurekaMag.com covers a wide range of topics including biology, agriculture, horticulture, forestry, geography, environment and health. Drawing...

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2011-07-14 10:15:16

Exotic marine species, including giant seaweeds, are spreading fast, with harmful effects on native species, and are increasingly affecting the biodiversity of the Mediterranean seabed. Some native species, such as sea urchins (Paracentrotus lividus), can fight off this invasion, but only during its early stages, or when seaweed densities are very low. Spanish researchers have carried out a study to look at the ability of sea urchins (Paracentrotus lividus) "“ generalist herbivores that...

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2011-07-01 10:10:00

Many animals have eyes that are incredibly complex "“ others manage without. Researchers at the University of Gothenburg have shown that sea urchins see with their entire body despite having no eyes at all. The study has been published in the scientific journal Proceedings of the National Academy of Sciences (PNAS). Most animals react to light and have developed a very sophisticated way of seeing complex images so that they can function in their surroundings. Good examples include...

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2011-05-03 08:06:20

Janies applies sequencing, supercomputing to correct erroneous classification A team of scientists has combined embryological observations, genetic sequencing, and supercomputing to determine that a group of small disk-shaped animals that were once thought to represent a new class of animals are actually starfish that have lost the large star-shaped, adult body from their life cycle. In a paper for the journal Systematic Biology, Daniel Janies, Ph.D., a computational biologist in the...

2011-02-02 15:21:29

Estuaries are highly appropriate systems for evaluating contamination. They are areas of accumulation of sediments and, effectively, numerous contaminants are found associated with these sedimentary particles. For a comprehensive evaluation, it is important to undertake studies on the effects of the contaminants in the environment; the toxicity trials enabling the quantification of such effects. These trials involve exposing organisms to sediments suspected of being contaminated, in order to...

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2011-01-17 07:56:27

Wildlife Conservation Society confirms sea urchins destroy reef building algae in overfished sites on Kenya's coast An 18-year study of Kenya's coral reefs by the Wildlife Conservation Society and the University of California at Santa Cruz has found that overfished reef systems have more sea urchins"”organisms that in turn eat coral algae that build tropical reef systems. By contrast, reef systems closed to fishing have fewer sea urchins"”the result of predatory fish keeping...

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2010-12-23 08:10:00

To survive in a tumultuous environment, sea urchins literally eat through stone, using their teeth to carve out nooks where the spiny creatures hide from predators and protect themselves from the crashing surf on the rocky shores and tide pools where they live. The rock-boring behavior is astonishing, scientists agree, but what is truly remarkable is that, despite constant grinding and scraping on stone, urchin teeth never, ever get dull. The secret of their ever-sharp qualities has puzzled...

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2010-03-16 08:09:24

Nature abounds with examples of evolutionary arms races. Certain marine snails, for example, evolved thick shells and spines to avoid be eaten, but crabs and fish foiled the snails by developing shell-crushing claws and jaws. Common as such interactions may be, it's often difficult to trace their origins back in evolutionary time. Now, a study by University of Michigan paleontologist Tomasz Baumiller and colleagues finds that sea urchins have been preying on marine animals known as crinoids...

2009-12-23 08:14:10

Some of the most common minerals in biology, including those in bones and shells, have a mysterious structure: Their crystals are positioned in the same orientation, making them behave as one giant crystal, even though they do not look like a faceted crystal. It's as if grains of salt were spilled on a rug, yet instead of landing randomly, all wound up with exactly the same angle and rotation. In a new study in the Journal of the American Chemical Society, Pupa Gilbert, a professor of physics...

2009-06-10 11:08:32

German scientists have cataloged the sea urchin axial complex, an internal structure with undetermined function. The researchers at the Charite University of Medicine in Berlin said the research shows within that group of marine invertebrates there exists a structural evolutionary interdependence of various internal organs. The finding, the scientists said, demonstrates the approach of combining all structural data available on a given organ in combination with a broad taxonomic coverage can...


Latest Sea urchin Reference Libraries

Diadema setosum
2013-11-21 12:27:30

Diadema setosum is a species of long-spined sea urchin in the family Diadematidae. It’s a typical sea urchin, which exceptionally long and hollow spines that are mildly venomous. D. setosum is different from other Diadema with five distinctive white colored dots that can be found on its body. The species is located throughout the Indo-Pacific region, from Australia and Africa to Japan and the Red Sea. Although it is capable of painful stings when stepped upon, the urchin is only somewhat...

Eccentric Sand Dollar, Dendraster excentricus
2013-11-21 12:20:48

The Eccentric Sand Dollar (Dendraster excentricus) known also as the Sea-Cake, Biscuit-Urchin, Western Sand Dollar, or the Pacific Sand Dollar, is a member of the order Clypeasteroida, better known as sand dollars, a species of flattened, burrowing sea urchins located along the Pacific Ocean from Alaska to Baja California. This species is an irregular echinoid that is flattened and burrows into the sand, unlike the regular echinoids, or sea urchins. It can be found living within the...

Red Sea Fire Urchin, Asthenosoma marisrubri
2013-11-21 12:03:03

The Red Sea Fire Urchin or Toxic Leather Sea Urchin (Asthenosoma marisrubri) is a relatively common sea urchin with a widespread distribution within the Indo-Pacific, and was, until 1998, considered a color variant of Asthenosoma Varium. Sea urchins are close relatives are crinoids, brittle stars, sea cucumbers, and starfish, all being echinoderms. This species grows to 25 centimeters in diameter, with articulated plates making the test quite flexible. It prefers water temperatures between...

Echinus tylodes
2013-11-15 10:51:41

Echinus tylodes is a species of sea urchin belonging to the Echinidae family. It’s white with rather sparse pink colored spines and is native to the eastern coast of North America including the Gulf of Mexico. This species has a sub-globular test that is about two-thirds as high as it is wide and grows to a diameter of 4 inches. The joints that are between the ambulacral plates and the pores through which the tube feet project are both sunken below the general surface of the test. The...

Ophiocoma scolopendrina
2013-11-15 10:40:07

Ophiocoma scolopendrina is a species of brittle star in the family Ophiocomidae. Ophiocoma scolopendrina, similar to other brittle star, have long and thin arms stemming from a small dish-shaped body and are around the size of an outstretched human hand. They belong to the phylum of echinoderms, which incorporates sea urchins, sea stars, and sea cucumbers. Dorsal disc and dorsal arm plates vary from black, multicolored black to a pale brown. The arms are abnormally banded. They can...

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