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Marine Mammals

Marine Mammals. Diving Adaptations for long and deep dives High hematocrit Muscles rich in myoglobin Reduction of heart rate Flexible rib cage Majority of oxygen in blood and tissues. Marine Mammals. Echolocation Common in dolphins, porpoises, toothed whales

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Marine Mammals

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  1. Marine Mammals • Diving • Adaptations for long and deep dives • High hematocrit • Muscles rich in myoglobin • Reduction of heart rate • Flexible rib cage • Majority of oxygen in blood and tissues

  2. Marine Mammals • Echolocation • Common in dolphins, porpoises, toothed whales • May occur in some baleen whales and pinnipeds Dolphins Whales Whales

  3. Marine Mammals • Migration • Baleen whales, pinnipeds • Toothed whales tend not to migrate

  4. Marine Mammals • Behavior • Playful behavior • Breeching • Spy hopping

  5. Ecology

  6. Ecology • Population Dynamics • Under favorable conditions populations can grow rapidly

  7. Ecology • Population Dynamics

  8. Ecology • Population Dynamics

  9. Ecology • Population Dynamics • Populations tend to be self-regulating • Populations grow until they reach carrying capacity • Population growth and carrying capacity may be determined by limiting resource • Limiting resources are different for different populations

  10. Ecology • Species Interactions • Intraspecific competition • Ex – Competition for algae by sea urchins • Ex – Competition for shells by hermit crabs • Interspecies competition

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