TopicORDER SIRENIA

Presenting To: Sir Zaheer Ahmad

Presenters: ANWAR ZADA, Asif Zaman &

Alia syed.

Scientific classificationof Dugong(ORDER SIRENIA)

• Scientific classification• Kingdom: Animalia

• Phylum: Chordata

• Class: Mammalia

• Order: Sirenia

• Family: Dugongidae

• Subfamily: Dugonginae

• Genus: Dugong

• Species: D. dugon

• Binomial name Dugong dugon

Description

• The Order Sirenia is made up of four species of manatees and dugongs.

• Front limbs are flippers for swimming • Sirenians lack hind legs but have

flattened tails.

GENRAL CHARACTERISTICS OF ORDER SIRENIA

• 1 They are aquatic mammals also known as sea cows .

• 2 Their body is strem-lined or spindle shape.

• 3 Hind limbs are absent.

GENRAL CHARACTERISTICS OF ORDER SIRENIA

• 4 fore limbs are modified as paddle

• 5 their tail is flattened

• 6 nostrils are on the upper surface of the snout

GENRAL CHARACTERISTICS OF ORDER SIRENIA

• 7 Clavicles are absent.

• 8 Their stomach is complex consisting many chambers.

• 9 And the most important is their testes are abdominal.

Food Habits

• All sirenians are vegetarians, feeding on vegetation such as sea grasses and other marine plants.

• While the dugong is strictly a bottom-feeder, eating only what lives on the ocean floor.

• manatees feed from above the water's surface all the way to the bottom

HABITAT

• Habitat• Unlike they are mostly freshwater, manatees,

dugongs are primarily marine mammals. • Dugongs generally inhabit shallow waters,

remaining at depths of around 10 m, although they occasionally dive to depths of 39 m to feed.

Lifespan/Longevity

• Dugongs have lifespans of 70 years or more in the wild, which is estimated by counting the growth layers that make up a dugong’s tusks.

REPRODUCTION

• Male dugongs defend their territories, and they change their behavioral displays to attract females. After attracting females, male dugongs proceed through several phases in order to copulate.

• The “fighting phase”• The “mounting phase”

Economic Importance for Humans: Positive

• Dugongs are economically valuable while alive as a form of ecotourism. Activities such as dugong-watching cruises in Australia and swimming with dugongs in the Philippines and Vanuatu help local economies.

• Dugongs are also hunted for a variety of reasons. In Malaysia, dugongs are eaten opportunistically when incidentally caught in fishing nets or traps and when incidentally or purposely caught when fish bombing, a method of fishing which involves throwing a bomb into the water.

• One dugong apparently sold for $105 USD, which could stimulate local economy.

Economic Importance for Humans: Negative

• There are no known adverse effects of dugongs on humans.

What ever you do good or bad people will always have something

Negative to say (Anwar zada et all)