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37 Cards in this Set
- Front
- Back
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Define megaptera novaeangliae |
Big wing of new england |
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Family? |
Rorquals Throat grooves |
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Baleen is? |
Triangular plates made of keratin for filtration 335 each side of mouth 2.5 ft long 1 inch wide |
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Defining characters |
Slowest rorqual Bush blow Tubercles Long pecs 3rd largest whale Fewer deeper Ventral pleats Hemispherical lobe-females Black and white ventral flukes |
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Pecs |
15 ft 1 ton Stabilize steer 1/3 body length |
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Length weight |
35-52 ft 35-40 tons |
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Tubercles |
On head Vibrissa |
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Fluke |
15 ft wide 2-4 tons |
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How find hi |
11° N magnetic detection Communication |
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Calves size |
14-16ft 1.5 tons |
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Gestation Stay w mom Nurse |
11-12 mo 1-2 yr 6-8 mo |
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Nurse gallons Fat % milk |
100 Gain 5-7 lb/hr 50% |
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Maturity |
Sexual 5yr Physical 8-12 yr Calves @ 2-3yr |
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Oldest |
48yr ? |
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Air |
Hb- 90% xchange Human 10-20% 300mph .5 sec xhale 1 sec inhale |
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Speed |
39 day quick migration usually 1-2 months 3-6 mph Actually 1-2 Fastest 16.5 |
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Tongue |
1 ton |
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Dive time |
10-20 min Sometimes 45 3-5 calf |
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Top 6 species hi |
Humpback Spinner Pantropical spotted Short-finned pilot Bottlenose False killer |
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How to photo ID |
Flukes Pecs Dorsal Calf throat grooves/pec nodules |
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Do whales sleep? |
Yes like any marine mammal. They are voluntary breathers and sleep half of their brain at a time for 15-20 min. |
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What the hawaiian word for whale? |
Kohola |
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Whats the hawaiian word for dolphin? |
Nai'a |
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How do you age a humpback? |
Match flukes, laminae (earwax like rings on a tree) |
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How long do whales live? |
50-60 or longer |
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How does a calf nurse? |
Tongue curls and milk squirted into mouth. |
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Feeding |
Lunge and bubble net 500-1000 gallons h2o and 40-50 lb food Small schooling fish, copepods, smelt, eels 1 ton/ day Freshwater from food |
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order to arrive |
females w yearlings juvenile whales reproducing males and females pregnant females |
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order to leave |
newly pregnant females juveniles and adults mother with calves wait til calves are strong enough |
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blubber |
30% body weight 7in thick |
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brain |
14lbs 5x heavier than a human brain heaviest=sperm whale=20lbs |
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cornea |
specially shaped allows vision above and below water |
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larynx |
divericulum chamber forces air thru larynx, pressure changes thru nasal passages to create sound |
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mouth |
lower jaw unhinge 90 angle expand 4x normal size |
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whaling |
north Pac humpbacks = 20,000---<1,000 in the 1970s after commercial whaling began now probably over 50,000 in world-increasing since regulation of commercial whaling |
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singing |
males breeding season depth 50-70ft same pop sing same song change over course of season, but pick up where left off last season |
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How many come to hawaii each year? |
6000-8000 60% of NPAC pop predicted to double w/in next 15 years |
