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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.

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Spermaceti organ 2. Migration

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  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

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