EARTH 10 Lecture Notes - Lecture 6: Antarctic Toothfish, Hemoglobin, Antarctic Krill
Document Summary
Abundant phytoplankton growth during extended summer daylight. Antarctic krill are one of the most abundant and successful species on earth. As krill grow they aggregate into huge schools. The krill, rich in protein and fat, are food for large numbers of animals. Phytoplankton grow abundantly during the extended daylight of summer and feeds huge populations of krill. Microscopic, single-celled algae are trapped inside the ice as it forms. Young krill congregate under ice in winter. Adaptation: no swim bladder, antifreeze glycoprotein in blood and bodily fluids, very little hemoglobin: less than 1% compared to 45% for most animals. Large, deep-sea predatory fish found only in waters surrounding antarctica. Warm blooded animals in cold climates are large o. Large animals will always keep their temperature more easily. Penguin feathers are short with an under-layer of fine wooly down. Two main types of seals o o. All feed at sea using sonar and the enhanced sight of their large eyes.
