Measuring the growth of Dr. Snyder's alewives

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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.

2/14

Graduate student Meghan Jensen testing the alewives for sedation by gently swirling a pole in the tank.

3/14

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

4/14

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

5/14

Sedated alewives.

6/14

Weighing an alewife.

7/14

Measuring the length of an alewife.

8/14

The alewife is put in clean oxygenated water to recover.

9/14

Graduate student Meghan Jensen enters data.

10/14

Returning the alewives to their tank.

11/14

Returning the alewives to their tank.

12/14

Returning the alewives to their tank.

13/14

Returning the alewives to their tank.

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Returning the alewives to their tank.