February
25, 2018
There
are 31 species of dolphins found in the world; 27 are oceanic, and 5 are river
dolphins. Those who inhabit the ocean dwell in saltwater but those living in
rivers, are adapted to freshwater. These numbers are continuously changing
because of new discoveries, taxonomic reclassification, and genetic studies.
All dolphins belong to the cetacean infraorder which also includes whales, dolphins,
and porpoises. Among them, the Ayeyawady dolphin is one of the species which
inhabit in the rivers in Myanmar.
The
Ayeyawady Dolphin as well as River Pig
Records
of the Ayeyawady dolphin in the Ayeyawady River date back to an ancient Chinese
text from AD 800 when they referred to as “river pigs”. The Ayeyawady dolphin
is now found in only three rivers in the world: the Ayeyawady in Myamar; the
Mekong in Cambodia and Lao PDR; and the Mahakham in Indonesia.
The
first scientific survey of dolphins in Myanmar was conducted in 2002, which
found them in a 400 km stretch of river between Bhamo and Mingun. There is now
roughly a minimum of 60 dolphins left in the Ayeyawady River, in addition to
approximately 80-100 individuals left in each of the Mekong and Mahakham
Rivers.
An
English naturalist, John Anderson had been to Myanmar and made a research
exploration along the Ayeyawady River from 1871 to 1879. During his research
trip, he discovered the round-snouted ash grey dolphin in the Ayeyawady River
and he became the first person who ever had discovered such type of fresh water
dolphin.
The
Ayeyawady dolphin is well-known for helping local fishermen and can be found in
Southeast Asian countries such as Myanmar, India, Bangladesh, Cambodia,
Thailand and Philippines. It can be found in the upstream of Mingun of the
Ayeyawady River.
Endangered
the Ayeyawady dolphin
The
status of the Ayeyawady dolphin has been raised from “vulnerable” to
“endangered” because its numbers have fallen by half over the past 60 years due
to human activities, according to the latest Red List of threatened species
produced by the International Union for Conservation of Nature (IUCN).
Currently
some of the Ayeyawady dolphins live in the river between Bhamo and Mandalay in
Myanmar, in addition to Mekong River in Cambodia and Laos, and in Mahakham in
Indonesia, according to the Wildlife Conservation Society (WCS) in Myanmar.
The
Department of Fisheries and Wildlife Conservation Society (WCS) have launched a
community-based ecotourism project in the ADPA zone, which encourages
dolphin-watching tours so that humans can experience the unique human-animal
interaction and hopefully contribute to the continuous rise of the local
dolphin population.
The
Ayeyawady Dolphin is a critically endangered species that inhabits murky waters
of rivers and estuaries in Southeast and South Asia.
Even
though electronic fishing is a major threat to the population of Ayeyawady
dolphins locally, other causes such as pollution in the river water, allegedly
caused by illegal gold mines in upstream areas, needed to be addressed as well.
The Department of Fisheries has enacted the Freshwater Fisheries Law in order
to prohibit from electric-shock fishing.
Dolphin
Watching Tourism
The
dolphins thriving in the segment between Mingun and Kyauk Myaung are famous for
having the very peculiar and interesting characteristics. The dolphins in this
area demonstrate the enigmatic relationship with fishermen. They are supposed
to assist the fishermen in finding the clusters of fish. The strange activities
of dolphins are fascinating the people, both local and foreign. The dolphin
lovers usually visit the places to watch the peculiarity of dolphins, thus
forging a business in tourism like Dolphin Watching Tourism.
Cooperative
Fishing
A
fishing boat is usually handled by two fishermen, one at the stern pedaling and
steering the boat and the other throws the net into the water for catching the
fish. The rower usually brings two oars, one short and another long one. The
short one is used for propelling and the long one is used as punting pole for
pushing the boat ahead in the very shallow part of the river where propelling
by oar is impossible, by thrusting the long oar at the river bed and force the
boat forward. The rower also brings a short wooden stick about one foot long
with one end having about one inch in diameter and tapering to the other end.
When
the fishermen, are out fishing, try first to find the dolphins by inquiring the
farmers working on the nearby bank and those working on sand bars in the middle
of the river. Dolphins, being the warm blooded mammals, do not live long under
water and often come up to the surface to breathe in the air. So people even on
the distant bank can see the location of dolphins.
When
the fishermen find the place of dolphins, they row their boat and approach the
dolphins as nearly as possible and beat the side of the boat by the stick they
bring rhythmically. Dolphins know the vibration produced by beating and they
have sharp sensor to detect the location from where the vibration comes.
Commonly two to three dolphins come to the fishing boat and stay at a
reasonable distance.
A
dolphin supposed to be the leader of the group surges its head above the water
and then sets its tail vertically above the water. The formation of this type
of display indicates the signal for the fishermen to be ready to catch the
fish. When the dolphin is exposing its tail horizontally above the water and
slaps the surface of the water, the fishermen understand it is the signal to
follow them. The fishermen then follow the dolphins which lead to the place
where they can find the fish.
The
strange relationship and understanding each other between the fishermen and the
dolphin is quite interesting. The dolphins signal the fishermen to be ready for
fishing by showing its tail straight up above the water as they see the cluster
of fishes in the water below..
Once
the fisherman saw the dolphin’s tail straight up above the water and swaying
sideways, he throws the fishing net into the water. Dolphins never take the
fishes caught in the net for food; they are just devouring fishes outside the
net. It is quite amusing to see the natural rule exhibiting the sharing of food
between the fishermen and dolphins. They help fishermen in finding the fish but
never breach the nature’s law of sharing food.
Conservation
of the
Ayeyawady
dolphin
Despite
high growth of population in the past, the Ayeyawady dolphin population is
dwindling and only 70 dolphins were counted by the survey in 2014. Local people
should have more awareness for the conservation of dolphins whereas the
institutions concerned are now taking measures to prevent dolphins from
extinction.
The
Department of Fisheries is making concerted efforts to manage this area and
protect dolphins through monthly patrols and enforcement against illegal
fishing techniques; educational outreach activities; research on dolphin
behavior and fisheries; monitoring the status of the dolphins and threats to
their conservation; and developing alternative livelihoods and economic
incentives for conservation such as ecotourism.
Translated
by
Win
Ko Ko Aung
By
Ko Ba (Kathar)
Ref;
The Global New Light of Myanmar
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