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At eight in the morning, my classmates and I boarded the bus which would take us to Homer and to an exciting adventure down by the beach, Bishop’s Beach to be exact. An adventure to the beach was a wonderful idea , we were all excited about it. After an hour drive from Nikolaevsk School we , the students along with Mr. Klaich, Mrs. Pancratz and Mr. Sellers were greeted by two scientists. Once we were in our gear, (boots, hats, and warm coats) the scientists began their explanation on beach etiquette and the rules. Once everything had been explained, we all set out on our half a mile trek down the beach to the tide-pool area.
At the tide pools, the scientists reiterated "beach etiquette" then we divided into groups, and made everyone within the groups paired up with a partner. Each pair was then given a study sheet with different critters, and then the groups were free to explore the tide pools. Among the many critters observed including sea cucumber, jellyfish, clam worms, etc. the most interest/fascinating for me was the nudibranch and the shield limpet.
My sister, the scientists and I spotted this little critter called a nudibranch in a tide pool.The nudibranch was fairly small, one to two inches long. Its coloring was much like that of a tigers, orange tentacles with black stripes.
Afterwards, we headed back to the rendezvous point for lunch. After lunch, we proceeded to the Island and Oceans Center to learn more about the minus four tides, which are extremely rare for this time of year. Curious about the nudibranch and the shield limpet that I saw in the tide-pools at the beach, I wanted to learn more about these critters so I began researching and discovered the following:
Nudibranchs scientific name i...
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...m/Animals/L/Lottia_pelta/. (BayScience Foundation)
Cowles , D ((2008): ). Aeolidia papillosa (Linnaeus, 1761) . Retrieved August 26, 2009, from Aeolidia papillosa Web site: http://www.wallawalla.edu/academics/departments/biology/rosario/inverts/Mollusca/Gastropoda/Opisthobranchia/Nudibranchia/Aeolidacea/Aeolidia_papillosa.html, (Cowles, 2008)
Lunsford , Ryan (2002). Lottia pelta. Retrieved September 3, 2009, from Lottia pelta, shield limpet Web site: http://www.wallawalla.edu/academics/departments/biology/rosario/inverts/Mollusca/Gastropoda/Prosobranchia/Order_Patellogastropoda/Family_Lottiidae/Lottia_pelta.html
(Lunsford, 2002)
Phipps, M (2006). Intertidal Marine Invertebrates of the South Puget Sound. Retrieved August 26, 2009, from Aeolidia papillosa The Sea Mouse Web site: http://www.nwmarinelife.com/htmlswimmers/a_papillosa.html, (Phipps,Telnack, 2006)
Fox, R. 2001. Invertebrate Anatomy OnLine: Artemia Franciscana. Lander University. http://webs.lander.edu/rsfox/invertebrates/artemia.html, retrieved February 13, 2011.
T. californicus is found from Alaska to Baja in small, shallow tidepools and tidal flats in the upper spray zone where they cannot avoid the full effect of visible and ultraviolet (UV) radiation. Individuals assemble in areas of lower radiation at midday, yet have no preference to the intensity of light at dawn and dusk (Hartline and Macmillan 1995). These tiny arthropods inhabit all types of marine sediments from sand to fine mud and ooze. Along with plankton, T. californicus eats microscopic algae, protists, bacteria, diatoms, algae and microbes (McGroarty 1958). When the concentrations of the species in their habitats are high, T. californicus will turn to cannibalism for a food source. The nautilus eye present in the species is rich with fatty acids and provides a good food source for the animal.
Limpets are a sessile species (Sessile animals are usually permanently attached to a solid substrate of some kind) which are abundant on rocky shores, as they are rich in algae (their primary food source) and spend most of their time clinging to hard substrates or bare rocks. They are capable of withstanding water velocities in excess of 20 ms−1 (Mark W. Denny and Carol A. Blanchette, 2000) which imposes large hydrodynamic forces on the limpet. Limpets can accomplish this b...
The Narwhal, Monodon monoceros, is a social, specialized deep-water marine mammal characterized by a unique tooth growth protruding from the upper jaw. Narwhals lives along the coasts and rivers throughout the Arctic,characterized by icy ocean temperatures. Narwhals are usually found in groups of 15 to 20, but herds of several thousand have been seen in the Arctic waters since 1871. Regularly found eastwards from the Canadian Arctic to central Russia they have also been distributed throughout the Eurasian Arctic and in an especially high abundance around the oceans west of Cape Farewell on the east coast of Greenland in the summers and during the winter primarily in the Baffian Bay, and in the Canadian archipelago in the springtime (Reeves, Tracey). The Narwhal has two teeth, located in the upper jaw, however only the left tooth usually develops leaving the underdeveloped right tooth in males and typically both teeth in females vestigial (Das). The protruding tusk grows to about 3 meters forward in a counterclockwise spiral pattern (Drury). The distal end of the tusk appears polished, with the remainder commonly covered by a growth of algae. There is an outer layer of cement, an inner layer of dentine, and a pulp cavity that is rich in blood (Reeves, Tracey). The Narwhal’s head and body ranges from 3-6 meters, with the pectoral fin being around 30-40 cm, and the tail flukes expanding over one meter (Reeves, Tracey). The males are typically larger in size than the females averaging about 3,500 pounds in males and 1,000 in females (Drury). Their bodies begin as an uneven grayish hue and as they mature darken to a mottled bluish black color, darker above than below (Reeves, Tracey). Narwhals posses relatively small heads, a blunt sno...
In the phylum Mollusca, there are many organisms that have body parts that change as the environment around them change; such as the octopus. An octopus can camouflage to variety of objects in its environment. Each organism in the Mollusca phylum has a type of foot that stows mobility and they eat by a radula. The radula is strap like tongue that has very sharp teeth and they can change to be different shapes or sizes based on their prey. They have a pseudo coelomate body plan, meaning that they have a coelom that exists, but it is lined by mesoderm only on the body wall, not around the gut. This video enhanced my understanding standing of the phylum Mollu...
Sabellaria cementarium belongs to the phylum Annelids and is an invertebrate polychaete species. They are found in small clumps at the rocky bottoms of the sea floor where they use the rich source of natural phytoplankton as their primary diet (Qian and Chia, 1990). The tube-like worms can behave social and form extensive reefs or independently build hollow tubes in to the sandstone (pawlik and Chia, 1991). Embryos form a polar lobe that is absorbed in to the blastomeres at the end of division. Larval development and movement follows shortly after the 14-15 hour fertilization period where spiral cleaving of the fertilized oocytes appears (Render, 1983). Much is still not known about the invertebrate worm in their natural niche.
Thomas, Lewis. The Medusa and the Snail: More Notes of a Biology Watcher. New York: Viking, 1979.
The Long Island Sound is an estuary, and is in fact one of the largest in the world. An estuary is a place where salt water from the ocean mixes with fresh water from the rivers that drain from the land. Moreover, like other estuaries, the Long Island Sound has an abundance of fish and other waterfowl that add to the natural balance of the island, as well as one of the most important economic factors (Tedesco). Like other estuaries around the world, the Sound provides breeding, feeding, nesting, and nursery areas for many species that will spend most of their adult lives in the oceans (Long Island Sound Study). Despite these similarities to other estuaries, the Long Island Sound is unique from anywhere else in the world. Unlike other estuaries, the Long Island Sound does not just have one connection to the sea but it has two. It has two major sources of fresh water flowing into the bay that empty into the ocean. It combines this two-...
The Web. 28 July 2011. http://redpath-museum.mcgill.ca/Qbp/3.Conservation/impacts.htm>. Interaction with kelp & sea otters. asnailsodyssey.com.
The smell of the restaurants faded and the new, refreshing aroma of the sea salt in the air took over. The sun’s warmth on my skin and the constant breeze was a familiar feeling that I loved every single time we came to the beach. I remember the first time we came to the beach. I was only nine years old. The white sand amazed me because it looked like a wavy blanket of snow, but was misleading because it was scorching hot. The water shone green like an emerald, it was content. By this I mean that the waves were weak enough to stand through as they rushed over me. There was no sense of fear of being drug out to sea like a shipwrecked sailor. Knowing all this now I knew exactly how to approach the beach. Wear my sandals as long as I could and lay spread out my towel without hesitation. Then I’d jump in the water to coat myself in a moist protective layer before returning to my now slightly less hot towel. In the water it was a completely different world. While trying to avoid the occasional passing jellyfish, it was an experience of
to the lobster and crab. Their closest living relative today is the horseshoe crab.The name
Davis, Lloyd S. and John T Darby. Penguin Biology. San Diego: Academic Press, Inc., 1990.
With its abundance of genera, the Burgess Shale is one of the world’s most important fossil fields. It’s discovery in 1909 led to over 100 years of paleontological study in the Canadian Rockies, a majority of which has been carried out in two quarries known as the Walcott and Raymond quarries (Hagadorn, 2002). Though he was originally in search of trilobites in the Burgess Shale Formation, paleontologist Charles Walcott also discovered a diverse group of soft- and hard-bodied fossils, from algae and sponges to chordates and cirripeds (Hagadorn, 2002). Soft-bodied fossils are incredibly rare due to their delicate structure and susceptibility to decay, so it is hard-bodied fossils that more regularly occur in fossil findings. However over 75,000 soft-bodied specimens have been found in the Burgess Shale formation (Hagadorn, 2002). These specimens are preserved in layers of shale formed from deposits of fine mud. One of the most significant species discovered is the Pikaia gracilens. Believed to be an early chordate, the Pikaia gracilens existed very close to the beginning of the evolutionary path that ultimately lead to humans (McGraw-Hill Encyclopedia, 2006).
Rolling waves gently brushed upon the sand and nipped softly at my toes. I gazed out into the oblivion of blue hue that lay before me. I stared hopefully at sun-filled sky, but I couldn’t help but wonder how I was going to get through the day. Honestly, I never thought in a million years that my daughter and I would be homeless. Oh, how I yearned for our house in the suburbs. A pain wrenched at my heart when I was once reminded again of my beloved husband, Peter. I missed him so much and couldn’t help but ask God why he was taken from us. Living underneath Pier 14 was no life for Emily and me. I had to get us out of here and back on our feet. My stomach moaned angrily. I needed to somehow find food for us, but how? Suddenly, something slimy brushed up against my leg and pierced my thoughts. I jumped back and brushed the residue of sand of my legs. What was that? As my eyes skimmed the water in front of me, I noticed something spinning in the foam of the waves. Curiosity got the best of me and I went over to take a closer look. The object danced in the waves and eventually was coughed out onto the beach. “Emily!” I called to my eight-year-old daughter who was, at that time, infatuated with a seashell that she found earlier that day. “Come here and see this! Mommy found something.” Although I had no idea what that something was and I definitely didn’t know it would change my life forever.