immediately picture a sea lamprey (Petromyzon marinus). These fish are jawless and can grow up to 80 cm as an adult. An adult lamprey’s mouth has teeth arranged in circular rows like something from a nightmare. When it comes time to feed, sea lamprey latch on to a host and drill a hole to obtain nutrient-rich blood. If that weren’t enough, they only have two dorsal fins and one caudal fin and lack pelvic and pectoral fins, which gives them an eerie, eel-like appearance. Lamprey even have a lateral line
Sea lamprey Petromyzon marinus It is not known about how the sea lamprey was introduced into the great lakes region. It was first discovered in around 1830s. It is hypothesized that it was introduced in the Erie Canal as well as other shipping canals years prior to its discovery. Originally it was a salt-water creature that lived in the oceans but now they have adapted and can live in fresh water and can live comfortably in the great lakes and other fresh water rivers and streams. It is probably
Invasive species do not only affect other species in their ecosystem, but also cost the United States more than one hundred and twenty million dollars each year in damages (“Cost” par. 2). Invasive species come in all different forms, and all have a negative impact on the environment. These species can come into a new area without being detected at first, but as time goes on their effects can soon be seen. Efforts are being made to prevent these invasive species from destroying fish population
family is infested with sea lamprey bites. What are sea lampreys? They are a perfect example of a type invasive species, which is an organism that is not native to a specific location (otherwise known as an introduced species). They have a tendency to spread quickly, and can cause negative impacts on things like the environment, human economy, or human health. They are becoming an increasing problem as the population of invasive species such as zebra mussels, sea lampreys, and carps are rising at an
Coyotes of Lamar Valley", Online, Internet, Jan 31, 1998, available www.sciencenews.org/sn_arc98/1_31_98/bobl.htm 6. Wright, Richard T., Biology Through the Eyes of Faith. San Francisco, Harper Collins Publisher, 1989 7. Sea Grant, (SGNIS), "Lamprey", Online, Internet, 1982, available, www.ansc.purdue.edu/sgnis/www/lamprey.htm 8. "Aquatic Invasive Species", Online, Internet, DATE, available www.aquatl.ifas.ufl.edu
Late Devonian Mass Extinction: Conodonts Introduction The Late Devonian mass extinction that takes place at the Frasnian-Famennian boundary is considered as one of the Big 5 mass extinctions (McGhee, 1998). Life at this time experienced huge losses among many different marine groups such as: brachiopods, molluscs, trilobites, conodonts, fish, as well as other organisms. In order to pinpoint a cause for the mass extinction both physical and geochemical processes have been looked at. The usual
laws allows a slave to be ill-treated to any extent, there are nevertheless some things which the common laws of life forbid us to do to a human being. Who does not hate Vedius Pollio more even than his own slaves did, because he used to fatten his lampreys with human
Canada is a very large country, with areas of land in various climate regions, and land regions, thus having many ecozones that differentiate from another. The most populated ecozone in Canada is the Mixedwood Plains; the ecozone we are located in, named after the mixedwood forests that are native to the area. The Mixedwood Plains is one of the smallest of the Canadian ecozones, spanning only 175 963 kilometres squared. The Mixedwood Plains is bordered by three of the great lakes on the southern
Influence on ecosystems range from human causes like the bulldozing of a forest to natural causes like a fire or a flood. In recent times, the introduction and spread of invasive species has transformed native communities rapidly and, in some cases, created irreversible damages. In the Earth’s history, changes have often occurred in the ecosystems. For example, glaciers and the retreat of glaciers cause wide-spread changes. However, although change is a constant in ecosystems, animals and habitats
In 1996, the Asian Longhorn Beetle made its way into the New York and New Jersey creating the decimation of the forests. The Asian Longhorn Beetle has so far caused the cutting of over 10,000 trees in New Jersey, and quarantine of 109 miles in New York today . The spread of this foreign beetle has created great impacts on the environment. The Asian Longhorn Beetle is an invasive specie, a harmful specie from another locations, mainly other countries, that has ended up in a foreign habitat. As time
1. Give a brief overview of the evolution of fish. Fish were amongst the first known chordates about 500 million years ago. Therefore, they have a very elaborate and complicated evolutionary history. The first type of fish to appear during the Ordovician era were called Ostracoderms. They had their head and flanks covered with a bony armor while they had a cartilaginous back. The shield was used to keep off predators. The extinction of the Ostracoderms during the Devonian period saw the emergence
Elizabethan Food & Dining For the well-to-do, eating during the Elizabethan and Jacobean periods was a fancy affair. A king or queen when going abroad could expect banquet tables filled with hundreds of dishes--for just one meal! There was much pageantry and entertainment. At Leicester, Queen Elizabeth I (predecessor of King James VI & I) was greeted with a pageant of welcome displayed on a temporary bridge. There were cages of live birds--bitterns, curlews, hernshaws and godwits. One pillar
I was on a trip to Australia. When I went there I had a goal set in mind, which was to go and see all the different types of fish. While I was on the boat, I also brought a friend who is a marine biologist, named Joe. I had my fishing line out, then I felt a slight tug, but then it got harder, until I asked Joe to come help me. When we brought it out of the water we were surprised since it was nothing I had ever seen and my friend Joe looked puzzled not for the same reason as me, but for why it was
Pests live where they are not wanted and cause harm to humans, plants, and animals. To eliminate these pests, chemicals called pesticides are often used. Pesticides are not a modern invention. The first recorded use of pesticides is 4500 years ago by Sumerians who used elemental sulfur to rid their plants of insects. Persians around 2000 years ago are known to have used dried daises as an insecticide to protect their grain. Up until the 1940s natural sources were only used for pest control. In 1939
above ,i.e., Ferdinand’s aim is not the achievement of sexual relations with his sister. One may like to contest this reading by highlighting Ferdinand’s highly erotic language for the duchess, such as- “And women like that part, which, like the lamprey, Hath nev’r a bone in’t.”[1.ii.255-256]. But, at the very basic plot level the argument stands refuted when despite incarcerating the duchess and visiting her in darkness, Ferdinand’s intentions are never the ones of violating her. Thus, clearly
Overpopulation is a looming issue. Equality is scarily equal. The end of the world is nigh. In a career of over fifty years, Kurt Vonnegut has written three short story collections full of science fiction and dystopian scenarios. Through these short stories, he creates imagined, futuristic societies that hyperbolize flaws of modern day society. Short, simple sentences, satirical societies, and the swift death of the main characters connect all of Vonnegut’s short stories. These elements will be analyzed
abusive language. Some may feel that his characterization is so extreme that it makes it difficult to take The Duchess of Malfi seriously, but he plays a central role in the dynamics of the play. “Ferdinand: And women like the part, which, like the lamprey, Hath ne'er a bone in't. Duchess: Fie, sir! Ferdinand: Nay, I mean the tongue” [Act 1, Scene II] This extract shows Ferdinand's dark ... ... middle of paper ... ...he calmed one, however he can’t be both, even though he is at certain moments
dorsally bony, that aided in balancing during their movements. The jawless fish had circular mouth parts that supported in sucking or even filter feeding (Larson, Echelle, & Kornfield, 1985). These features though are found in the present hagfishes and lampreys. An example of the Agnathans was the hemicyclasis, a fish that had just one nostril and a head shield that was bony. During the Devonian period, the Agnathans evolved, and fish with paired fins surfaced. These fish had some similarities to the Agnathans
only a small region, but a whole country. The luxurious Great Lakes ecosystem has been severely damaged by more than 180 invasive and non-native species. According to Felix Martinez, species such as zebra mussels, quagga mussels, round goby, sea lamprey, and alewife reproduce and spread, ultimately degrading habitat, out-competing native species, and shorting the food webs (Great Lakes Region 2). “Zebra mussels are small, fingernail-sized animals that attach to
The Swell Shark, whose scientific name is Cephaloscyllium Ventriosum, is swell. The Swell Shark has many unique features, including its habitat, anatomy, feeding, and defense tactics. The Swell Shark is also a member of many diverse taxonomic groups, including Chordata and Chondrichthyes. These groups have many defining characteristics, which the Swell Shark displays all of. Lastly, despite the Swell Shark being of Least Concern in terms of conservation, it is still important to protect this species