Zoo Stock Species and the Red List
Zoo Stock Species and the Red List
Zoo Stock
This indicates that the species is included in the Second Zoo Stock Plan, which was formulated by the Tokyo Metropolitan Government in 2018. The plan sets goals for the next 10 years in three areas: "species conservation," "contribution to wildlife conservation," and "environmental education and conservation awareness." 124 animal species are included.
What is the Red List?
Based on scientific research, this is a list of wildlife classified by rank (category) indicating the degree of risk of extinction.
Livng Things Encyclopedia shows the categories (mainland and islands) assessed by the IUCN (International Union for Conservation of Nature) at the global level, the Ministry of the Environment for Japan, and the Tokyo Metropolitan Government for Tokyo.
The higher the category in each table, the higher the risk of extinction, and CR, EN, and VU are the three categories known as "endangered species." In Tokyo, species that are not at the NT (near threatened) level but are relatively rare are considered "species of concern."
|
IUCN categories |
|
|---|---|
|
EX |
extinction |
|
EW |
Extinction in the wild |
|
CR+EN |
— |
|
CR |
Serious crisis |
|
EN |
crisis |
|
VU |
emergency |
|
NT |
Near Threatened |
|
LC・○ |
Low Concern |
|
DD |
Data shortage |
|
LP |
— |
|
Japan (Ministry of the Environment) Category |
|
|---|---|
|
EX |
extinction |
|
EW |
Extinction in the wild |
|
CR+EN |
Endangered species |
|
CR |
Critically Endangered |
|
EN |
Endangered species |
|
VU |
Endangered species |
|
NT |
Near Threatened |
|
LC・○ |
— |
|
DD |
Lack of information |
|
LP |
Endangered |
|
Tokyo Category |
|
|---|---|
|
EX |
extinction |
|
EW |
Extinction in the wild |
|
CR+EN |
Endangered species |
|
CR |
Critically Endangered |
|
EN |
Endangered species |
|
VU |
Endangered species |
|
NT |
Near Threatened |
|
LC・○ |
Unranked |
|
DD |
Lack of information |
|
LP |
Endangered |
Creatures at Ueno Zoo
Creatures at Ueno Zoo
Asian Arowana
Scleropages formosus
Asian Arowana
Scleropages formosus
It is believed that its appearance has remained almost unchanged for over 100 million years, and it is sometimes called a "living fossil." It is carnivorous, eating insects and small fish near the water surface, as well as small animals that have fallen into the water, but it is also able to jump and sometimes catch prey from above the water. After the female lays her eggs, the male is known to take the eggs in his mouth and nurse them without food until the fry reach a certain size.
| classification | Actinopterygii, Oligochaeniformes, Oligochaeniidae |
|---|---|
| English name | Asian Arowana |
| distribution | Southeast Asia (Indonesia, Malaysia, Thailand, Cambodia, Vietnam) |
| Residence | Tropical freshwater areas with gentle currents and aquatic plants |
| Size |
Total length: 60-90cm
|
| food | Small fish, crustaceans, insects, sometimes small amphibians, small animals |
| Red List |
IUCN: EN (crisis)
|