Urchin

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  • Sea Urchin Gametes Lab Report

    Introduction Sea urchin gametes are an excellent model for observing vertebrate development. Sea urchins are a low cost species that can be maintained in a laboratory environment, have external fertilization and have distinct stages for viewing development in offspring. They are external breeders, so when the gametes are mature, they are released into seawater. The seawater carries the gametes where they will fertilize and develop. How does the sperm find the eggs? The jelly coating on the mature eggs produce a chemical signal that attracts sperm (Gilbert, 2000). This method of sperm finding egg must have a protection mechanism for the right sperm to find the right egg. The sea urchins have a particular bindin receptors that look specifically…

    Words: 1147 - Pages: 5
  • Methoxychlor Pesticide

    on the effects of exposure of environmental toxicants believed to interfere with hormone-sensitive processes related to reproductive development and sexual differentiation, but few studies have examined the effects of early exposure to these environmental toxicants on other aspects of vertebrate development. Because of their rapid development and their aquatic nature, sea urchins may be particularly sensitive and useful for studying the effects of environmental toxicants on early development.…

    Words: 1494 - Pages: 6
  • Essay On Spring Island Lessons Learned

    that will affect the predators of those fish and the chain keeps on going also in life if you treat someone well or poorly that might affect how they treat you in the future. Nature was beautiful in BC, it was amazing to see the old growth forest and that that was one of the few ones in the world meaning most forests are man-made. The natives of kyuquot use all things and don’t waste anything like when they make or find food, shelter, and transportation. Everything is connected was mentioned a…

    Words: 1001 - Pages: 5
  • Sea Otters Lab Report

    Population 1. Introduction: From Mexico, to Alaska, and even within Japan, there’s a high chance of being able to visit areas where sea otters can be sighted. Sea otters, also known scientifically as, Enhydra lutris, inhabit shallow coastal areas and they prefer places with a lot of kelp. They use the kelp surrounding them to wrap themselves in while they’re resting. They are very sociable creatures and eat animals that have shells, like clams and abalone. (www.marinemammalcenter.org/) Another…

    Words: 1347 - Pages: 6
  • Case Study: Cronicas De Mistmantle

    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 thing in the…

    Words: 881 - Pages: 4
  • Keystone Species Essay

    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 column from the top to the bottom where the kelp is rooted. There is a…

    Words: 657 - Pages: 3
  • Biological Impacts Of Ocean Acidification

    on Atlantic Cod Gauds Morhua larvae were observed. Three concentrations of water including a control 370 micro-atm, a medium of 1,800 micro-atm, and a high concentration of 4,200 micro-atm were used within the experiment. In the high concentration, seven to forty-six cod larvae were observed with increased otolith growth. However, no major impacts were present on the larvae such as fluctuating asymmetry (difference between left and right side). In another source, the growth and development of…

    Words: 955 - Pages: 4
  • The Missing Sea Otters

    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…

    Words: 325 - Pages: 2
  • Persuasive Essay On The Nature Of Human Cloning

    “twin” but it is actually another you, would this amuse you or horrify you? Cloning is a big controversial issue around the globe, and this isn 't anything new to us. We have seen cloning in movies, cartoons, and in video games. The idea of cloning has been bounced around a lot since 1885. When we think about cloning, we see the future, the only thing we fail to realize is the damage it will cause. There was stages before cloning was officially a concept, it started with the idea of “twinning”.…

    Words: 1030 - Pages: 5
  • Keystone Species

    Present an instance of one keystone species and describe its environment. Speculate on changes to the environment which could occur if that particular species disappeared. Give specific reasons for each variety. The keystone species, is a phenomenon in which a certain species keep the proportion of an ecosystem in check. Sea otters, are a great example of a keystone species. Because, they keep sea urchins from consuming and destroying large kelp fields. If the otters were to…

    Words: 281 - Pages: 2
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