Chapter 31, Problem 39A

Summary Introduction

To write:

Size of male that uses the mating strategy, that involves fighting with an alpha-sized male until one isopod wins.

Introduction:

Paracerceis sculpta is a member of kingdom Arthropoda and belongs to order isopoda. Paracerceis sculpta are marines in nature. Male are polymorphic in Paracerceis sculpta and exists in three forms alpha, beta and gamma of different sizes. Alpha males are largest in size and most dominant among all three.

Explanation of Solution

Any social behaviour which is related to fighting is known as agonistic behaviour. Agonistic behaviour has a wider meaning than aggressive behaviour because it includes displays, placation, retreats, threats and conciliation. Agonistic behaviour is seen in animals which are competing for the same resources for example food or mates.

Alpha male which is largest in size uses the mating strategy that involves fighting with an alpha-sized male until one isopod wins. Thus, this behaviour is related to fight it is a agonistic type of behaviour.

Conclusion

Alpha male uses the mating strategy that involves fighting with an alpha-sized male until one isopod wins. This is a agonistic type of behaviour.