1 / 18

Spermaceti organ 2. Migration

Marine Vertebrates: Lecture 13. Spermaceti organ 2. Migration. Spermaceti organ: anatomy. 28 C. 30 C. 32 C. 37 C. Spermaceti oil: T, P and density. Low T, high P  increased oil density. Spermaceti organ: water intake. Role of maxillonasalis muscle. Migration: Overview.

shalin
Télécharger la présentation

Spermaceti organ 2. Migration

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Marine Vertebrates: Lecture 13 Spermaceti organ2. Migration

  2. Spermaceti organ: anatomy

  3. 28C 30C 32C 37C Spermaceti oil: T, P and density • Low T, high P  increased oil density

  4. Spermaceti organ: water intake • Role of maxillonasalis muscle

  5. Migration: Overview • Migration: To pass, usually periodically, from one region or climate to another for feeding or breeding • Key questions • What is an animal’s migratory route? • Methods of study? • Why do they migrate? • How do they find their way? • Human impact on migratory patterns

  6. Fig. 8.13: Arctic tern migration

  7. Arctic and Antarctic terns Arctic ternPhoto by Brian Small Antarctic ternPhoto by Danny Gallant

  8. E. Pacific Grey Whale migration • What’s in the north ~May – Nov? • What’s in the south ~ Dec – April? • For pregant females/offspring • For others?

  9. E. Pacific Grey Whale migration

  10. Humpback migrations • Note split of Australian population • Recent incident: “lost” males and song change http://migration.files.wordpress.com/2007/06/migration.gif

  11. Blue whale migration and food

  12. Bluefin tuna (Barbara Block) • Western breeders • Eastern breeders

  13. Bluefin tuna (Barbara Block) • Individual track, W. Atlantic spawner

  14. Bluefin tuna: 4.5 years tracked!

  15. Distribution & fish size

  16. Green sea turtle migration

  17. Movement Patterns of Wandering Albatrosses South Africa South East (Shaffer et al. 2001, 2003)

  18. Pacific salmon: route compared to ocean circulation http://www.scielo.cl/fbpe/img/rchnat/v77n3/img01-03.jpg http://www.fao.org/docrep/006/y4652e/y4652e0b.jpg

More Related