Breeding and the Conservation of the Japanese Giant Salamander (Andrias japonicus) Report on the...
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Transcript of Breeding and the Conservation of the Japanese Giant Salamander (Andrias japonicus) Report on the...
Breeding and the Conservation of the Japanese Giant Salamander (Andrias japonicu
s)Report on the Activity of SSC/JAZA (Amphibian)
Kazushi Kuwabara Hiroshima-City Asa Zoological Park
The Status of Japanese Amphibian and the Activity of SSCJ.
Amphibian in Japan: 60 species
Urodelen 22 Anulan 38
RDBJ listed species: 17 species
Urodelen 12 Anulan 5
SSP species in JAZA: 5 species
Urodelen 4 Anulan 1
SSP species of JAZA
Andrias Japonicus R/IUCN/RDBJ Ⅰ/CITES Hynobius takedai En/IUCN/RDBJ
Hynobius hidamountanus Vu/IUCN/RDBJ
Echinotoriton andersoniR/RDBJ
Rana ishikawae Vu/IUCN/RDBJ
Breeding and the Conservation of the Giant SalamanderWhat is the Japanese giant salamander?
R/IUCN/RDBJ /CITESⅠOne of the biggest Amphibian of the World Living fossilThe Special Natural Monument of Japan
The Distribution and the Population.
Distribution of the Japanese giant salamander is showed in red-painted zone.The population is unknown. My estimate is about 30,000~50,000.
Asa Zoo
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→
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habitatt
Landscape of the Habitat.
Dr.Kobara, the first director of Asa zoo initiated this project. Followed by the establishment of JAZA facilities
Himeji city AquariumKoube city AquariumMiyajima town AquariumNagoya city ZooKochi prefectural Zoo
The Start of the Study on the Japanese Giant Salamander.
We found out a breeding nest under the bank on the edges of the river in 1976.
bank
Breeding nest under the bank
river
entrance
breeding bed
The Breeding Nest of the Japanese Giant Salamander
One owner male possessed the nest exclusively.
One female entered the nest.
Several males followed her.
The female came out 2 hours later.
Other males came out too.
Searching in the nest, newly-laid egg-mass came out.
Only the owner male remained and guarded the egg-mass.
↑ ↑Owner male egg-mass
We made the tank containing the breeding nest.
The aquarium consisted of four tanks linked by pipes.
nettingoverflow
inflow
wooden cover
living nest
Breeding nest
pipe
The first egg-laying in 1979. ‘Ushiroyama’ became the owner male.
The New Farm of the Giant Salamander on Asa Zoo
river
nest nestnest
nest nest
nest
water flow
inflow
Over flow
pump
The New type Aquarium
The egg-laying of the giant salamander in captivity.
Maturing age was known 17 years from her which was born at Asa zoo.
‘IGAGURI’T.L. 70cmB.W. 2.7kg
Weir was preventing the breeding migration.
The egg-mass floating in the river
egg ↓
egg ↑
She was injured in her soles by struggle to climb over the weir.
Asa zoo made an artificial breeding nest.
And we set the breeding nest under the weir.
artificialnest ⇒
We succeeded in breeding in the artificial nest three years later.
We are also working on the improvement of weir.
Water surface
Entrance pipe tunnel
Concrete wall
Artificial nest
diameter 60cm
height 90cm
Bank
The Artificial Breeding Nest under the Bank.
↑↑ a little water flow
The cleaning of the artificial nest with local people.
↑ artificial nest
‘Giant Salamander festival’ has been held at the habitat town since 2002.
JAZA and parties set up ‘Association of the Japanese Giant Salamander’ in 2003.
END