Status
Rhodeus ocellatus kurumeus (Nippon baratanago) was widely distributed in small ponds, reservoir, and creeks in Kyushu and the western part of Japan. However, since Rhodeus ocellatus ocellatus (Tairiku baratanago) was introduced, the population of Tairiku baratanago has been increasing dramatically all over Japan. By coexisting those two species in many area it tended to occur hybridization easily.
| R. o. kurumeus
(Nippon Baratanago) |
|
|---|---|
| Conservation status | |
|
Critically Endangered |
|
| Scientific classification |
In fact hybridization and subsequent gene introgression has been observed within these subspecies in Kashima and Ogori. Because of these interbreeding events the number of R.o.kurumeus has dramatically declined all over Japan and now the population of R. o. kurumeus (Nippon baratanago) is in danger of extinction. In 1994 R. o. kurumeus (R. o. smithi, Nippon baratanago) was on the IUCN Red List as an endangered species, and now it is critically Endangered. Nippon baratanago (R. o. kurumeus) is also listed as a critically endangered species on the Japanese Red Data Book.
Read more about this topic: Rosy Bitterling
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