Great Lakes Center

Home

Measuring the growth of Dr. Snyder's alewives

1/14

For many years, Dr. Randy Snyder did experiments with alewives in the fish lab at the Field Station. In 2012, we documented the weighing process. First, alewives in tanks are given a sedative.

A large round tank with small silver fish in it.

2/14

Graduate student Meghan Jensen testing the alewives for sedation.

A person uses something on a pole in a large round tank. There is another tank behind the first. Another person is standing at a counter.

3/14

Alewives beginning to be sedated, so their response to stimuli is slower.

A large round tank with small silver fish in it. The fish have moved.

4/14

Dr. Snyder transfers alewives to a higher sedation so they are easier to handle without hurting them.

A person pours a small bucket into a cooler sitting on a counter in a lab.

5/14

Sedated alewives

6/14

Weighing an alewife.

7/14

Measuring the length of an alewife.

A person measures a small fish lying on a towel with a ruler. There is a bucket of water on the counter next to it.

8/14

The alewife is put in clean oxygenated water to recover.

A person's hand over a bucket of bubbling water with a thin tube in it.

9/14

Graduate student Meghan Jensen enters data.