7. Evolution
During the miocene ( 23 to 5 Mya) mammals were fairly
modern, the seldom changed morphologically from that time
Diversified from their last common ancestor around 15 Mya
8. Adaptation
Body shape: Streamlined body and two
limbs that are modified into flippers,
bulbous head , no external ear flaps ,a
non flexible neck, a torpedo shaped
body
• Swimming : Dall’s porpoise is one of the fastest cetaceans
discovered with the ability to travel at 76km/h
• Sensor: porpoise use echolocation as
their primary sensor system
9. Diving: porpoise have a layer of fat or blubber under the skin
• Sound production: porpoise
produce a variety of clicks
10. Blowhole:
Brething involves expelling stale
air from the blowhole, forming an
upward, steamy spout, followed by
inhaling fresh air into the lungs
Stomach
• Porpoise have a two chambered stmach that is similar in the
sructure to the terrestrial carnivours,
• They have fundic and piloric chambers
Adaptation
11. Food and feeding habit of porpoise
Ulva lactucasquidPorpoise capture
fish
crustaceans
15. Porpoise conservation
The vacuata nearly became extinct in the twentieth
century with a predicted population of fewer than 100
individuals
The harbour porpoise , spectacled porpoise ,
Burmeister’ s porpoise, Dall’s porpoise are all
listed on appendix II of the conservation on the
conservation of migratory species of wild animals
(CMS)
harbour porpoise spectacled porpoise
Burmeister’ s porpoise
Dall’s porpoise
16. conservation
The agreement on the conservation of cetaceans in the
black sea, Mediterranean sea and contiguius Atlantic area
(ACCOBAMS) and the note of the understanding
concerning the conservation of the manatee and small
cetaceans of western Africa and Macaroneisa
The chinese academy of science’s wuhan Institute of
hydrobiology has been working with the world wide
fund to ensure the future for this subspecies and have
placed five porpoise in another well protected area.
17. Conservation
CIRVA and CITES worked together on
The endengered species Act and
Marine Mammals protection Act
(MMPH)