Biology at Dalhousie University
Links to Subtopics
- Jay Crewe's Page
- Rebuilding Evolutionary History with the Alu Element
- Mihori Ikeda's Page
- Ogasawara Islands - Galapagos in Asia-
- Belinda Maier's Page
- Endangered Species of Nova Scotia
- Eleanor Melrose's Page
- Myxobolus cerebralis: The causative agent of whirling disease in salmonid fish
- Alexis Paluch's Page
- Primate Diversity
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Evolution and ecology are two almost everyday words used by biology students today. The two words cover major areas of biology and in themselves are very general. The site Dictionary.com defines as so:
- evˇoˇluˇtion
Pronunciation (ev-o-lushn) n. a. Change in
the genetic composition of a population during successive generations, as a
result of natural selection acting on the genetic variation among
individuals, and resulting in the development of new species. b. The
historical development of a related group of organisms; phylogeny.
- eˇcolˇoˇgy
Pronunciation (e-kol-a-g) n. pl. eˇcolˇoˇgies
a. The science of the relationships between organisms and their
environments. Also called bionomics. b. The relationship between
organisms and their environment.
These pages, written by the very capable and intelligent students found
in BIOL2500, are devoted to these two words. The pages in themselves show
the broad and profoundly interesting subjects covered by those two words.
Enjoy!
Molecular Evolution & The Alu gene
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In the past evolutionary study consisted mainly of gathering fossils and comparing them to existing organisms and then looking at their synamorphies to categorize them into taxa. The process is subjective with scientists saying that one organism looks more like hippo than a rhino while other scientists said the opposite. Finding evidence for the relationships was also difficult, often relying on complete fossil records showing each step of evolution as it occurred. Today, however, with the great advancements in genetics and molecular biology, a new way of classifying organisms has developed using biochemical laboratory genetic sequencing and computer analysis.
Click here to view Jay's site
Image Source: GC 1131 Home Page at the University of Minnesota. Used with permission.
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The Ogasawara Islands - the Galapagos in Asia
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The beautiful Ogasawara islands with unique ecosystem are called "the Galapagos in Asia". The varied topography of islands provides for a wide range of habitats, and there is a high degree of endemism. However, most of the native forest had been cleared. Although the Japanese have protected large areas as national park, the remainder of natural vegetation continues to be threatened.
Click here to view Mihori's site
Image Source: STUDIO MONONOFU
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Endangered Species of Nova Scotia
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Nova Scotia has many unique habitats and species. Due to human interference many wonderful species have become threatened. In order to protect these species and prevent further declines in population numbers, species that are at risk of extinction or extirpation must be evaluated. In order to implement conservation measures a full knowledge of the threats that face Nova Scotia's species must be investigated. This page lists the fauna in Nova Scotia that are labeled as endangered. It must be noted that many other species in Nova Scotia are at risk, but are labeled as either threatened or rare.
Click here to view Belinda's site
Image Source: North Atlantic Right Whale Consortium. Used with permission.
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Myxobolus cerebralis
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Myxobolus cerebralis is a microscopic parasite which causes whirling disease in salmonid fish. This disease is responsible for high mortality rates in hatchery reared fish, and has recently been detected in wild populations. This site offers an overview of the topic, with a particular emphasis on current and recent research.
Click here to view Eleanor's site
Image Source: Cal Fraser. Used with permission.
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Primate Diversity
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This site focuses on the wide diversity within the order Primates. Information is provided on the features that separate primates from other mammals including their senses, intelligence, behaviour, reproduction, and manner of locomotion. The remainder of the site focuses on the distinguishing characteristics of the large primate groups, including Prosimians, New World Monkeys, Old World Monkeys, Lesser Apes, Great Apes, and finally, humans.
Click here to view Alexis' site
Image Source: John White, University of California, Berkeley
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