| Physical
Characteristics |
|
The humpback whale is not quite the same
as other rorquals it is not as bloated looking as the other rorquals
but more rotund. Bumps called tubercles cover the head of the humpback
each of them containing a single hair similar to a cats whisker, whalers
nicknamed these bumps as 'stoveboats' and there function is sensory
in nature. Their flippers are their most distinguishing feature and
are much longer than other whales. Their fins vary in size and shape
much more than other whales and their fins and tails can often be
covered in barnacles. |
|
| Length
and Weight |
|
The humpback is a relatively large whale
and can measure up to 19m or 61ft in length and an adult can weigh
between 25 to 35 tons. |
|
| Diet |
|
The humpback consume a wide variety of
food, in the Southern Ocean they feed on krill and in the Northern
Oceans they feed on schooling fish including mackerel, capelin, anchovy
and sardines. They lunge at their prey with their mouths wide open
and then expel the water through the 270 - 400 plates of baleen on
each side of their mouth with the fine hairs measuring up to 2ft in
length. |
|
| Breeding
|
|
The humpback whale reaches sexual maturity
at five years of age and the normal gestation period for a calf is
one year. Calving in the northern hemisphere unusually takes place
in winter time and in summer time in the southern hemisphere. Unlike
other species of whale the calf will normally be weaned after one
year and it is usual for a female to produce a calf once every two
to three years. |
|
| Uses
of the whale |
|
First grade oil from the blubber which
is edible was used for the manufacturing of margarine, and also in
the production of soft soap. Oil was also extracted from meat and
bones after they were pressure cooked. Meat extract was also produced
from the meat and was very edible similar to branded meat extract
drinks. The liver was also processed to produce liver oil for medicinal
purposes. The meat residue from the pressure cookers was rendered
down to make cattle feed and fertilizers. The baleen plates from the
mouth which in the olden days were used for stays for ladies corsets
but in modern whaling the baleen plates were discarded. |