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Abstract

Worldwide populations of killer whales (Orcinus Orca) have long been thought to be an individual species with a unique cultural component. Transient and Resident orcas have long been studied to determine the cause of their starkly different societies and prey predilection. Until recently, they were considered to be no more than ecotypes of one another—genetically identical although behaviorally very different. Recent research, however (the discovery of a drastically dissimilar pod in Antarctic waters) has led scientists to question this classification and contemplate the real possibility that these divergent groups could in fact be genetically isolated species. With this being the case, much more care must be given to preserve the struggling resident populations of killer whales, as they cannot be supplemented or replaced by the more stable transients.

















Table of Contents
Title Page 1
Abstract 2
Table of Contents 3
Introduction 4
Childhood Fantasies 4
Far From Friendly 4
Two Schools of Thought 5
Figure 1: Dorsal Fins of Differing Populations 6
Cultural Differences 7
Figure 2: Vocal Dialects 7
Physical Evidence 8
Resident Pods 8
Transient Pods 8
Antarctic Pygmies 9
Figure 3: Size Variations Among Orcas 9
Drastic Differences 10
Genetic Analysis 10
Conclusion 11
References 13



Introduction
Childhood Fantasies
The name Shamu conjures up within each of us a powerful mental image: a massive, graceful, black and white animal dexterously leaping from the water and performing acrobatic feats with ease. Undoubtedly those who have seen such a display have been left with...