1 / 22

Whales, Whales, Whales – Part II

Whales, Whales, Whales – Part II. November 30, 2018. Mysticeti – No teeth Two blow holes Baleen – made of keratin (like our hair and nails) Includes the largest whales. Baleen whales fall into one of three groups, depending on feeding technique (Nemoto, 1969).

valeriee
Télécharger la présentation

Whales, Whales, Whales – Part II

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. Whales, Whales, Whales – Part II November 30, 2018

  2. Mysticeti – • No teeth • Two blow holes • Baleen – made of keratin (like our hair and nails) • Includes the largest whales

  3. Baleen whales fall into one of three groups, depending on feeding technique (Nemoto, 1969). • Gulpers or Swallowers • 2. Skimmers • 2b.  Swallowers and skimmers • 3. Benthic (bottom) feeders

  4. “Skimmers” swim very slowly with their mouths open, “filtering constantly until enough food has accumulated on the baleen to be scraped off and swallowed.” This category includes right whales, bowheads, & sei whales. “Gulpers” blue whales, fin whales, Bryde’s whales, minkes, humpbacks, and infrequently, sei whales - swim a bit faster and must feed more intensely to satisfy their food requirements. A meal consists of a series of separate mouthfuls; each time the animal takes in a huge amount of water along with the plankton or fish, then forcefully expels the water through the baleen. SKIMMERS AND GULPERS Benthic Vacuum  Vacuum up sediment…eating things Inside…example – grey whale.

  5. Sei Whale Skimming…. Sei Whale Balaenoptera borealis Diet: Primarily copepods and euphausids. Skim through schools of crustaceans, often leaving trail of bubbles just prior to surfacing. Adults to 18 m 30 tons Females slightly larger than males At birth approx 4.5 m

  6. http://cetus.ucsd.edu/voicesinthesea_org/species/baleenWhales/northAtlanticRight.htmlhttp://cetus.ucsd.edu/voicesinthesea_org/species/baleenWhales/northAtlanticRight.html Right Whale Adults 13-18 m 60 tons Females larger than males Diet: zooplankton, primarily copepods. Feed by skimming through dense Concentrations of prey with mouth open.

  7. Right Whales and Sound

  8. large scaly gray-white patches on their skin, whose patterns are unique from animal to animal. • colonies of crustaceans known as whale lice which can exist in the tens of thousands upon each whale. • The parasitic creatures subsist on algae and dead skin, and while they are irritants, they do not cause significant harm to the whale.

  9. Diet: Zooplankton, primarily krill (euphausids). May consume an estimated 4 tons per day during peak summer feeding periods Blue Whale Balaenoptera musculus

  10. Adults to 23-27 m 125 tons Females slightly larger than males At birth approx 7 m Record N. Atlantic length 28 m Earth’s largest animal ever.

  11. Blue Whales

  12. https://dosits.org/galleries/audio-gallery/marine-mammals/baleen-whales/fin-whale/https://dosits.org/galleries/audio-gallery/marine-mammals/baleen-whales/fin-whale/ Fin Whale Diet: Variety of small schooling fish (herring, capelin, sand lance), squid and planktonic crustaceans. Gulp large swarms often by swimming on their right side. Adults 17-24 m ~ 70 tons At birth approx 6.5 m, 2 tons

  13. This sequence illustrates the six-second feeding lunge of a fin whale, which can carry the whale some 35 feet and collect as much as 25 pounds of shrimp-like krill. The volume of water the fin whale engulfs is about the size of a school bus. (Jeremy A. Goldbogen & Nicholas D. Pyenson graphic)

  14. Gray Whale Eschrichtius robustus • 16 meters (52 ft) • weight of 36 tonnes  lives 50–60 years

  15. Eastern North Pacific Population ~20,000-22,000 Western N. Pacific – ranked as endangered, only ~100 (hunted to extinction in the N. Atlantic in the 18th Century

  16. South bound – Mid-November to Mid-February Northbound – Mid-February to mid-May ~12,000 mile long, roundtrip, journey - Distance of 120 km (75 mi) per day at an average speed of 8 km/h (5 mph).

  17. Devil Fish • Believed to be the longest migration • of any known mammal.

  18. Happiest face ever

  19. The Humpback Whale Adults range in length from 12–16 m (39–52 ft) weigh approximately 36,000 kilograms (79,000 lb)

  20. Humpbacks – bubble net feeding

  21. Humpback new feeding mechanism – skimming right above the bottom

  22. Mysticeti have teeth. • True • False

More Related