{"id":282,"date":"2016-05-25T16:27:22","date_gmt":"2016-05-25T23:27:22","guid":{"rendered":"https:\/\/sites.evergreen.edu\/vms-spring\/?p=282"},"modified":"2016-06-06T16:49:03","modified_gmt":"2016-06-06T23:49:03","slug":"polychaeta-worm","status":"publish","type":"post","link":"https:\/\/sites.evergreen.edu\/vms-spring\/polychaeta-worm\/","title":{"rendered":"Polychaeta Worm"},"content":{"rendered":"<p><strong>Polychaete worm\u00a0<\/strong><!--more--><\/p>\n<p><strong>Zooplankton Family:\u00a0<\/strong><\/p>\n<p>This type of worm is a bottom feeder that live in mud and that float around the oceans floor.\u00a0 There are about 9000 species of annelids and more then 8000 of them are polychaetes. These worms are among the most common in marine organisms that can be found in the bottom of the oceans sea floor. Some of them may reach the length of three meters long when they are fully grown.\u00a0 From my lab work what I noticed when I first saw this organism for the first time, was that it had an almost dragon look to it.\u00a0 I also noticed right away that it was a predator, when I watched it eat plankton right in front of my eye.\u00a0 Showing that this worm doesn\u2019t mess around even when its environment is changed it can still take over a new environment and be at the top of the food chain.\u00a0<\/p>\n<p><iframe loading=\"lazy\" width=\"676\" height=\"507\" src=\"https:\/\/www.youtube.com\/embed\/CQbcoG07JRc?feature=oembed\" frameborder=\"0\" allowfullscreen><\/iframe><\/p>\n<p><strong>The life of a Polychaete worm:<\/strong><\/p>\n<p>In this article they were testing the effects of different water environment on Polychaete worms to see how it would affect them.\u00a0 And to see how their growth would change. Right away they saw signs of growth on the test worms. The test went on for 28 days, the growth rate was milligrams dry weight per day.\u00a0 The test worms were juveniles about two to three weeks old.<\/p>\n<p>\u201cFor example, grain size had no significant effect, whereas the number of worms placed in each exposure vessel was critical. Direct transfer from 30%0 seawater to salinites \u226415%0 had a highly significant and adverse effect on survival and growth\u201d. (\u201cDevelopment of a Chronic Sublethal Bioassay for Evaluating Contaminated Sediment with the Marine Polychaete Worm Nereis (Neanthes) Arenaceodentata.&#8221; <em>&#8211; Dillon<\/em>. 2016\u201d).<\/p>\n<p>From reading this article I noticed right away that this was a long test to see how the Polychaete worms would survive in a different environment. And to also see if they would have any significant changes in their growth and or looks.<\/p>\n<p>In this next article I found they are talking about super rare fossils of a Polychaete worm, in Herefordshire Konservat\u2013Lagerst\u00e4tte of England. They found three different fossils of Polychaete worms that are in perfect condition. Which is very rare to find since, most of the fossils that are found of Polychaete worms. Are usually compressed and are to poorly preserved for meaningful comparison with extant forms. \u201cThe new genus has a generalized polychaete morphology with large biramous parapodia, unspecialized anterior segments and a small prostomium with median and lateral antennae and ventral prostomial palps. Cirriform branchiae arise from the ventral surface of each notopodium, and may be homologous with the inter\u2013ramal branchiae of the extant nephtyids(Brilliant Brittle Stars.&#8221; <em>About.com Education<\/em>. N.p., n.d.\u201d). \u00a0In this article what I learned was that that studying these fossils are a very complex proses. Just finding a Polychaete worm fossils that is in good condition is a very rare so I wonder how many they have found that weren\u2019t in good condition.\u00a0 Because when I was looking at the Polychaete worms under the micro scope I noticed that it was a transparent organism.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-large wp-image-1620\" src=\"https:\/\/sites.evergreen.edu\/vms-spring\/wp-content\/uploads\/sites\/209\/2016\/05\/Polychaete-environment-938x1024.jpg\" alt=\"Polychaete environment\" width=\"676\" height=\"738\" srcset=\"https:\/\/sites.evergreen.edu\/vms-spring\/wp-content\/uploads\/sites\/209\/2016\/05\/Polychaete-environment-938x1024.jpg 938w, https:\/\/sites.evergreen.edu\/vms-spring\/wp-content\/uploads\/sites\/209\/2016\/05\/Polychaete-environment-275x300.jpg 275w, https:\/\/sites.evergreen.edu\/vms-spring\/wp-content\/uploads\/sites\/209\/2016\/05\/Polychaete-environment-768x838.jpg 768w, https:\/\/sites.evergreen.edu\/vms-spring\/wp-content\/uploads\/sites\/209\/2016\/05\/Polychaete-environment-945x1031.jpg 945w, https:\/\/sites.evergreen.edu\/vms-spring\/wp-content\/uploads\/sites\/209\/2016\/05\/Polychaete-environment-600x655.jpg 600w, https:\/\/sites.evergreen.edu\/vms-spring\/wp-content\/uploads\/sites\/209\/2016\/05\/Polychaete-environment.jpg 964w\" sizes=\"(max-width: 676px) 100vw, 676px\" \/><\/p>\n<p>From reading these two articles I have learned that Polychaete worms are actually pretty significant organisms for scientist to study and do test on in the field. And that they are very adaptable organisms to a new environment. What I think that this could teach the humans of the 21<sup>st<\/sup> century is that life can live in some strange environment and can take very odd forms to us as humans. Also when we go into the ocean we are trespassing on the high way of the plankton, diatoms and crustaceans that are all around us all the time in the water. And we shouldn\u2019t be so harsh to the oceans because with out all the smaller life in the ocean the food chain would die off and maybe even us along with it.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Polychaete worm\u00a0<\/p>\n","protected":false},"author":3337,"featured_media":365,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false},"categories":[15,4],"tags":[],"_links":{"self":[{"href":"https:\/\/sites.evergreen.edu\/vms-spring\/wp-json\/wp\/v2\/posts\/282"}],"collection":[{"href":"https:\/\/sites.evergreen.edu\/vms-spring\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sites.evergreen.edu\/vms-spring\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sites.evergreen.edu\/vms-spring\/wp-json\/wp\/v2\/users\/3337"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.evergreen.edu\/vms-spring\/wp-json\/wp\/v2\/comments?post=282"}],"version-history":[{"count":0,"href":"https:\/\/sites.evergreen.edu\/vms-spring\/wp-json\/wp\/v2\/posts\/282\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sites.evergreen.edu\/vms-spring\/wp-json\/wp\/v2\/media\/365"}],"wp:attachment":[{"href":"https:\/\/sites.evergreen.edu\/vms-spring\/wp-json\/wp\/v2\/media?parent=282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sites.evergreen.edu\/vms-spring\/wp-json\/wp\/v2\/categories?post=282"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sites.evergreen.edu\/vms-spring\/wp-json\/wp\/v2\/tags?post=282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}