Urchin

Both reading passage and lecture are about reasons that made the sea otter to be declined. According to the reading passage, the author claims that environmental pollution and predation are the reasons of this declining. However, the professor doubts that by stating that the reason is the predation only. First, the passage states that according to the pollution sources that found along the Alaskan coast and the level of chemicals that increased, the sea otter population has declined. In…

common and important food source for them would be sea urchins. Sea urchins can be found all across ocean floors, all around the world. More specifically,…

Cronicas de Mistmantle Urchin de las Estrellas Fugaces Everything started in a day were all the stars were falling from the sky, a little baby squirrel was born and abandon in a place called Mistmantle, that night Father Fir was making sure that Mistmantle the place where all the animals were was safe , that same night he saw something in the ground , he got scared and surprised at the same time. Father Fir was an old porcupine and very religious animal. When he went to see the mysterious…

compounds and sea urchins as toxic. For example, two scientist Bôttger and McClintock studied the effects of the widely known sea urchin: Lytechinus Variegatus. In their experiment they exposed Lytechinus Variegatus to both inorganic and organic phosphates, which are also accepted endocrine disruptors. These scientists found that the exposure of this sea urchin to these phosphates inhibited gonadal growth, the spawning activities, and additionally the biochemical composition of the sea urchins…

the development of sea urchin embryos. The teratogen used in this experiment was ethanol at various concentrations. As alcohol concentrations increase, the permeability of cellular membranes changes and the protein to protein interactions are altered (Lab 4). In the experiment 2% and .5% ethanol was used. We performed this experiment in order to see if there would be changes in the sea urchin embryo if we introduced a teratogen into its environment.…

The kelp forest is operated in a top-down trophic interaction. The sea urchins feast on the kelp if not kept in check by predation they can overgraze the forests and cause loss of habitation for fish and their young. With sea otters being able to forage on the sea urchins they reduce the chances of overgrazing. This is important because of all the habitation the kelp forests supply; they produce a habitat in the whole water…

According to the article “Search for the Missing Sea Otters: An Ecological Detective Story” by Mary E. Allen and Mark L. Kuhlmann, the sea otter population has been decreasing at a rapid pace since the 1990’s in Aleutian, Alaska. This is demonstrated by article “What Could be the Cause of Decreasing Otter Numbers” which states that in 1997, the decline of the sea otter population had increased to about 90%. They hypothesize that the decrease in the sea otter population has been caused by their…

sea urchin in increased carbon dioxide conditions was examined. Over the time period in which the experiment was conducted, sea urchins underwent minor carbonate dissolution. The growth of the sea urchin was reduced. However the stability of the organisms was unchanged. Another effect of increased carbon dioxide included spines of the sea urchin dissolving more severely. This in turn make the sea urchin more vulnerable to predation which could spell disaster within the food chain as sea urchin…

Enhydra Lutris or otherwise known as the Sea otter is an iconic species that embodies the rich diversity of ocean life. As one of the major groups of the weasel family, sea otters are also one of the smallest marine mammals. Unlike other mammals, such as whales and dolphins, Sea otters do not have blubber, instead they have one of the thickest and densest coat of fur. This fur coat holds up to almost one million hairs per square inch (Ravalli, 2010). With this amount of hair, the Sea Otter is…

and coral use budding which is when a new organism grows off the body of the parent organism naturally until the new organism falls off and begins to fend for itself. The earliest form of artificial cloning began in 1885 with sea urchins. The cloning of the sea urchins was both a clone and a refutation of a current theory of cell biology. Scientists posited that the first combination of sperm and egg to produce an organism had a complete amount of genetic information. When the cell…