ANSC 53500 or BMS 52800
Avian Physiology

Name: _____________________

Endocrinology and Reproduction

Worksheet #2

1. (3 pts) Describe the effects of androgens on secondary sexual characteristics and behavior of male birds.

2. (3 pts) Define the terms open-period and the lag-period. Is there any relationship between the open-period and the lag-period of the ovulatory cycle (egg-lay cycle) of the hen?

3. (4 points)

 (a) List the hormones/agents that regulate oviposition in the hen.

 (b) Name their sources.

 (c) Briefly describe their actions during oviposition.

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