Sakhalin taimen
| Japanese huchen Sakhalin taimen |
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Salmoniformes |
| Family: | Salmonidae |
| Genus: |
Parahucho Vladykov, 1963 |
| Species: |
P. perryi (Brevoort, 1856) |
| Synonyms | |
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Hucho perryi |
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Hucho perryi
The Sakhalin taimen (Parahucho perryi, syn. Hucho perryi), also known as the Japanese huchen, is a large, East Asian species of fish in the salmon family (Salmonidae). It is found in the Primorsky Krai and Khabarovsk regions of eastern Russia, Sakhalin Island, the Kuril Islands and Hokkaido, Japan and inhabits lakes and large rivers. The population has been in general decline for a century at least. Contributory factors include degradation of the environment by logging, oil exploration and change of land use to agriculture. The fish is caught by commercial fishing as bycatch, by recreational anglers and illegally by poaching, and present populations are estimated to be less than 5% of their historic levels. The International Union for Conservation of Nature has rated the fish as being critically endangered. Although initially placed in the genus Hucho, genetics and other evidence has shown that it belongs in its own monotypic genus Parahucho.
Parahucho perryi is one of largest, most ancient salmon species and primarily inhabits the lower to middle reaches of lakes and rivers. Fish over 30 cm (1 ft) long are almost exclusively piscivores, while the young feed mostly on aquatic insects. Females typically lay between 2,000 and 10,000 eggs in the spring on the sandy or gravelly river bottom. The average specimens caught have weighed around 5 kg (11 lb). The largest fish caught was recorded at 9.45 kg (20.8 lb) (IGFA world record). According to the unauthorized record of Japan, a fish with length of 2.1 m (6.9 ft) was captured in 1937 from the Tokachi River, Hokkaidō.
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