Data compilation of marine pelagic organism biomasses, swimming velocities, clearance and respiration rates

Jellyfishes have functionally replaced several overexploited commercial stocks of planktivorous fishes. This is paradoxical, because they use a primitive prey capture mechanism requiring direct contact with the prey, whereas fishes use more efficient visual detection. We have compiled published data to show that, in spite of their primitive life-style, jellyfishes exhibit similar instantaneous prey clearance and respiration rates as their fish competitors and similar potential for growth and reproduction. To achieve this production, they have evolved large, water-laden bodies that increase prey contact rates. Although larger bodies are less efficient for swimming, optimization analysis reveals that large collectors are advantageous if they move through the water sufficiently slowly.

Tab.1: Estimates for marine mammals populations south of the Antarctic Polar Front

The aim of this contribution is to supply summarized information on the distribution and numbers of marine mammals in the Antarctic. In relation to the topic of the workshop the question to be answered is: "Is there spatial or temporal variation in mammalian presence in the Antarctic area that has relevance to the operation of acoustic devices". If acoustic devices have impact on marine mammals, this does not stop at political borders. Nevertheless, since legal implementation of the Antarctic Environmental Protocol was the major stimulus behind the workshop, this contribution was asked to limit itself to the Antarctic Treaty area, that is south of 60°S.

Students crossing State St. in front of Michigan Union. Taken for the Michigan Alumnus, April, 1947

On negative sleeve: A suggestion of warmer days ahead for winter-weary Michiganders is contained in this early spring picture, taken from the Michigan Union looking across to Alumni Memorial Hall just as students leave classes at the noon hour

Poetry" sculpture on base of front facade flanking step

Albert Kahn, architect. Building completed 1924. Named James Burrill Angell Hall. Sometimes called Literary College. Interior ceiling decorations: Di Lorenzo Studios, N.Y. On verso: University of Michigan News Service

History" sculpture on base of front facade flanking step

Albert Kahn, architect. Building completed 1924. Named James Burrill Angell Hall. Sometimes called Literary College. Interior ceiling decorations: Di Lorenzo Studios, N.Y. On verso: University of Michigan News Service

Arts" sculpture on base of front facade flanking step

Albert Kahn, architect. Building completed 1924. Named James Burrill Angell Hall. Sometimes called Literary College. Interior ceiling decorations: Di Lorenzo Studios, N.Y. On verso: University of Michigan News Service

Scene in front of Bus. Ad. Bldg. [Business Administration Building]

Lee Black & Kenneth Black, architects.

Rackham Building front view

Smith, Hinchman & Grylls, architects. W.B. Wood Co., construction. On verso: University of Michigan News Service, 3564 Administration Building, Ann Arbor, Michigan.

Boulder with plaque beside elm tree planted by the class of 1869. In front of Angell Hall to the left of the steps. Gift of the Class of 1869.

On verso: M-10

Notes inside front cover.

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