Darwinian Snails Lab BIO 360 – God and Evolution – Fall 2012 Modified by John Braverman from EvoBeaker Introduction The flat periwinkle is a small snail that lives on seaweeds growing on rocky shores in New England. Among the snail’s enemies is the European green crab. As its name suggests‚ the European green crab is not native to North America. It traveled from Europe early in the 19th century. Before 1900‚ the green crab did not occur north of Cape Cod‚ Massachusetts. After the turn
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Agrodok 47 Snail Farming Production‚ processing and marketing Dr J.R. Cobbinah Adri Vink Ben Onwuka This publication is sponsored by: ICCO © Agromisa Foundation‚ Wageningen‚ 2008. All rights reserved. No part of this book may be reproduced in any form‚ by print‚ photocopy‚ microfilm or any other means‚ without written permission from the publisher. First edition: 2008 Authors: Dr J.R. Cobbinah‚ Adri Vink‚ Ben Onwuka Illustrator: Barbera Oranje Design: Eva Kok Translation: Catharina
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Types of snail: There are many types of snail but not less than 14 of these are edible. The most popular and most lucrative to breed for consumption and commercial purposes are achachatina marginata‚ archatina archatina‚ helix pomatia and helix aspersa. The first two are usually very big‚ weigh between 150 and 200g‚ lay between 5 and 300 eggs per batch and 8 times each growing season‚ and measure 90-130cm in length. The last two species of snail are helical in nature‚ generally small‚ weigh 5-25g
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Background The periwinkle snail is in the family Littorinidae and is known as a shore snail. These tiny snails are approximately 1-½ inches long and are found among rocks‚ on wood pilings between high and low tides‚ underneath docks‚ and in mud pools. The largest periwinkle snail‚ Littorina littorea‚ is the most common variety. The periwinkle snail originated in Europe and was brought to Canada in the mid-1800s. It can be found all along the East Coast of the United States‚ from New England to
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Snail is a common name that is applied most often to land snails‚ terrestrial pulmonate gastropod molluscs. However‚ the common name "snail" is also applied to most of the members of the molluscan class Gastropoda that have a coiled shell that is large enough for the animal to retract completely into. When the word "snail" is used in this most general sense‚ it includes not just land snails but also thousands of species of sea snails and freshwater snails. Occasionally a few other molluscs that are
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self-employment. One such attractive area for self-employment is snail rearing. It is a great money-spinning business that can provide a substantial source of protein to complement Nigerian carbohydrate meals. Sadly Nigerians inclination to go into business in the fields where thousands have already made their fortune has led to the ulter neglect of such lucrative area of snail farming in Nigeria or export at international market. Many people see snails here and there. Some people take it as meat. But quite
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TITLE Habituation of snail. OBJECTIVE To investigate the effect of habituation of snails to a stimulus To develope certain experiment skills‚ such as working safely‚ producing valid results‚ recording results and drawing valid conclusions from results. INTRODUCTION The snails Figure 1: Garden snail Taken from http://abugblog.blogspot.com/2011/05/handsome-snail.html Snails are one of the earliest known types of animals
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Coffee Bean Snail The coffee bean snail‚ or Melampus coffeus‚ is a very small gastropod with coffee-like coloring. These small snails reach only about three quarters of an inch in length and one half inch in height. The shells are wide and taper into a narrow point around the base. They are usually brown‚ tan‚ gray‚ or yellow-brown. There are also two small bands that typically run around the shell that are lightly colored. These snails are usually found in the shady‚ dense habitats in the
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Land Snail Practical Write Up Land snails are used as an archaeological methodology of reconstructing the past and are an environmental method that can fill in the gaps of other methods. For example‚ pollen and macroscopic plant matter study show the general change of a large area and only survive when waterlogged. Chalk lands are prime archaeological landscapes useful for study and land snail evidence can survive in them where other evidence cannot. Also‚ as oppose to representing a large scale
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while others used the smoke of fire to signal their friend who were far from them. Lately postal mail was used as a mean for correspondence‚ which was referred to as snail mail afterword. And with the invention of telegraph and development of civilization a new tool came in known as e-mail. There are significant discrepancies between snail mail and e-mail along with some common points. First of all‚ both tools are uses for communication in society‚ and they are both under risk in terms of confidentiality
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