Rainbow Troutニジマス
Oncorhynchus mykissLC— Least Concern
The rainbow trout (Oncorhynchus mykiss) is a salmonid native to cold-water tributaries of the Pacific from Kamchatka through Alaska, Canada, and the US West Coast to northern Mexico, recognized by the broad reddish stripe along its flank. Since 1875 it has been introduced to at least 45 countries and now ranks among the world's most invasive species, though in Japan it was first introduced from California in 1877. Unlike most Pacific salmon, it survives spawning and can breed repeatedly over several years.
Rainbow Trout (reference photo)
Species Data
Did You Know?
- Adults show distinct black spots across the body and a broad reddish stripe running from gills to tail, most vivid in breeding males. Source
- Unlike most Pacific salmon, rainbow trout do not die after spawning and can breed repeatedly over several years. Source
- Since 1875, it has been introduced to at least 45 countries on every continent except Antarctica, and it ranks among the world's 100 most invasive species. Source
Where to See This Species
2 facilities · 0 individuals
みなとやま水族館 (Minatoyama Suizokukan)HyogoOpened in 2022
みなとやま水族館のWikipedia記事に飼育種として記載 Source
山梨県立富士湧水の里水族館 (Yamanashi Kenritsu Fujiyuusuinosato Suizokukan)Yamanashi東富士五湖道路 山中湖ICから5分、中央高速 河口湖ICから20分。
山梨県立富士湧水の里水族館のWikipedia記事に飼育種として記載 Source
Conservation Story
Conservation Status
Oncorhynchus mykissはIUCNでLCです。一方、日本では導入先の在来生態系への影響にも配慮が必要です。
Habitat
北太平洋沿岸の冷水河川・湖沼。降海型は海域も利用します。
Threats
- 原産地での河川改変
- 水温上昇
- 導入先での在来生物への影響
Conservation & Breeding Efforts
- 原産地の河川環境保全
- 導入地域での放流管理
Sources
Support Conservation
A visit is a small, positive way to support the daily lives of the animals you care about.
- Visit
- A visit itself helps support the facility.
- Animal Supporter Programs & Giving
- Find ways to support the facility through its official website.
- Furusato Nozei
- Municipally run facilities may share official guidance for this Japanese hometown-tax program.
FAQ
- When was the rainbow trout introduced to Japan?
- It was first brought to Japan in 1877 from California, in the United States. Source
- Does the rainbow trout die after spawning like Pacific salmon?
- No. Unlike most salmon, it survives spawning and can breed again in subsequent years. Source
- How widely has the rainbow trout spread outside its native range?
- Since 1875 it has been introduced to at least 45 countries across every continent except Antarctica, and is now considered one of the world's most invasive species. Source
Source: ja.wikipedia.org en.wikipedia.org