Killer whale

Draft Plan:

• Introduction
• Orcas:
  • Presentation of the animal: what is an orca ?
  • Anatomy
  • Marain middle
  • Adaptation to this middle
  • Feeding,Hunting
  • Reproduction
  • Spatial and behavior structure
  • The population growth
• Pollution:
  • Definition
• Observation of the animal
  • The diefferant technics to observe the animal

Orcas, Orcinus orca

Spatial and behavior structure

During expedition we can observe that dolphins member and so Orcas are structured as a herd. In fact these animals stay in group together and stay closer to each other than to an animal from an other group. We sometimes have two or three members of the group that were more in front of the others to watch for inshore areas or danger. We can also observe one or two leaders of the group. These leaders are stronger and larger than the others. These dominant member observed the area for potential danger or investigates if there is something new happening near the group. When there is a danger the animals immediately regroups there self in a packed group with the youngest in the middle protected by the other members. There movement are synchronize and in harmony.

References

Dolphin Societies, discoveries and puzzles, edited by Karen Pryor and Kenneth S.Norris The Ecology of whales and dolphins, edited by D.E.Gaskin

maybe you should start putting all the references somewhere on the wiki...--Pierre.brawand 2 février 2009 à 22:59 (MET)