Bivalves

    Page 1 of 3 - About 22 Essays
  • Class Bivalves Essay

    Literature Review of Class Bivalves 1. Introduction Freshwater and marine bivalves Taxonomy, ecological value, economical value, current Issues, current threats 2. Taxonomy According to Treatise on Invertebrate Paleontology, the Bivalves class was divided into six subclasses which cover 13 orders. The first subclass, Palaeotaxodonta, have characteristics such as small body, taxodont, protobranch, infaunal and aragonitic shells. This subclass has only one order, Nuculoida. In the second subclass Cryptodonta, there are two orders, Solemyoida and Praecardoida. The main feature of this subclass same with previous subclasses except the absence of tooth (dysodont). Subclass Pteriomorpha includes order Arcoida, Mytiloida and Pterioida which is heterogeneous. The shell made from calcites or aragonite. Paleoheterodonta as the fourth subclasses have mostly aragonitic basic shells includes order Modiomorphoida, Unioidia, and Trigonoida. Order Unioidia is known as freshwater bivalves. The fifth subclass, Heterodonta, mostly has a shells made of aragonites. The crossed-lamellar shells feature in these subclasses is a morphology adaptation as filter feeder. Veneroida, Myoida, and Hipputitoida are the…

    Words: 832 - Pages: 4
  • Essay On Shark Finning

    the oceans, the role of sharks is to keep other marine life in healthy balance and to regulate the oceans. Remove sharks and that balance is seriously upset. Studies are already indicating that regional elimination of sharks can cause disastrous effects including the collapse of fisheries and the death of coral reefs. One study indicates that the elimination of sharks resulted in the destruction of the shellfish industry in waters off of the Mid-Atlantic due to unchecked population growth of…

    Words: 1005 - Pages: 4
  • Argumentative Essay: Shark Finning

    Sharks are an essential part of the largest ecosystem on the planet and help maintain the balance of life in all the oceans. If we allow shark finning to continue, we condemn sharks to extinction. Not only are we hunting down these magnificent creatures for fin soup, but we are also condemning ourselves in the process. Sharks are a vital part to the ecosystem, they are apex predators and play a major role as ecological stabilizers in our ocean. In the article “Shark Finning: Sharks Turned Prey”…

    Words: 319 - Pages: 2
  • 3d Sonohoscopy Lab Report

    Technique of Saline Infusion Sonohysterography (SIS): The 3D- sonohysterography was scheduled in the proliferative phase of the menstrual cycle (day one post menstrual). Antispasmodic and anti-inflammatory were given for the patients 30 minutes before the procedure. The procedure was done in dorsal lithotomy position , the uterine cervix was cleaned with antiseptic solution (povidine –iodine) after insertion of standard bivalve speculum standard bivalve speculum , The upper cervical lip…

    Words: 898 - Pages: 4
  • Essay On Filter Feeders

    Many deep sea organisms feed by using a method known as filter feeding to separate food particles from water. This is typically done by passing the water over a specialized filtering structure in their body, capturing all the nutrients. The category of filter feeders include a wide range of animals such as bivalves, sponges, barnacles, and some types of snails and fish. Filter feeders does not only exist in the deep, but can also exist in the shallow and on land. Baleen whales and flamingos also…

    Words: 1112 - Pages: 4
  • Dumbo Octopus Research Paper

    Did you know that Dumbo Octopus is located at the bottom of every ocean in the world? The Dumbo Octopus is located in the deep depths in oceans, and rarely gets any sunlight since it lives so deep. The Dumbo Octopus is rarely seen, and that’s why only very few people know about it. Dumbo Octopuses live in the deep depths in the New Zealand, Australia, Monterey Bay in California, in the waters of Oregon and the Philippines, as well as Papua, and New Guinea. The Dumbo Octopus lives in the depths…

    Words: 371 - Pages: 2
  • Keystone Species Essay

    important life, without them the ecosystem they live in will have a domino effect that will change the ecosystem or destroy it all together (Nancy, 2013). The Sea Otter (Euhydra lutris) are remarkable creatures in that they help keep their environment in check (Konar, 2000). The genus name Euhydra and the specific name lutris are both translated into otter, Greek and Latin respectfully. There are three subspecies of sea otter two in Alaska (E. l. lutris, E. l. kenyomi) and one in California (E.…

    Words: 657 - Pages: 3
  • Mud Flats Habitat

    time. The influence of predation has a definite effect on the distribution of meiofauna in soft-sediment communities Callinectes sapidus, commonly called the blue crab, is a benthic opportunistic predator found along the Atlantic coast. Contrary to their name, the blue crab is more of a dull green-gray color. The claws of adults are the only truly blue part of the crab, with females having red tips that males lack. Another distinction between males and females are their abdomens. Males exhibit a…

    Words: 1000 - Pages: 4
  • Jules Verne's 20, 000 Leagues Under The Sea

    knocked off the ship that went to hunt for the supposed narwhal, to when he escaped with Conseil and Ned on that little boat. Learning about the ocean, of course- but also about madness and survival. He went from a arrogant know-it all who relied on his word only to a more humble, more knowledgeable teacher. His time on the Nautilus had changed him, and he knows it. This book is for anyone who likes a lot of action and loves the underwater kingdom. Jules Verne uses words to make you feel…

    Words: 786 - Pages: 4
  • Correlation Between Shellfish And The Estimation Of Heavy Metal Shrimp

    had significantly the highest As residues (19.40 ± 1.16 ppm/ww), followed by clam (16.72 ± 1.23 ppm/ww), shrimp (15.91 ± 1.60 ppm/ww), oyster (14.60 ± 1.24 ppm/ww), crayfish (13.33 ± 1.43 ppm/ww) and finally mussel (12.55 ± 0.90 ppm/ww) (Fig. 2A). Levels of As in edible tissue of shellfish from our study were corresponding to those reported by Rattanachongkiat et al. (2004) in fish and crustacean species in Pak Pa-Nang Estuary and catchment, located in Southern Thailand. Unlikely, Kucuksezgin…

    Words: 1851 - Pages: 8
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