A number of subspecies are known, including the widespread nominate subspeciesyamame (O. m. masou), the critically endangered Formosan salmon (O. m. formosanus) in landlocked waters of Taiwan, the Biwa trout (O. m. rhodurus) endemic of Lake Biwa, and the anadromousamago (O. m. macrostomus) restricted to western Japan.
A masu salmon which has reached sexual maturity has a darkened back, and the stripes on the body sides become bright red with crimson tinge to merge on the abdomen into one common longitudinal band of lighter color. For this reason, it was given the name cherry salmon.
As adults, masu salmon tend to weigh 2.0 to 2.5 kg (4.4 to 5.5 lb) and measure roughly 50 cm (20 in) in length.[3] The maximum size that can be attained by this species (which is in the region of Primorsky Krai) is 71 cm (28 in) long and 9 kg (20 lb) in weight.
Ecologyedit
On average, this salmon prefers a temperate climate around the latitude of 65-58°N, and in the sea, it prefers a depth of 0–200 m (0–656 ft).
Like other Pacific salmon, masu salmon’s biological life cycle is subdivided into freshwater and marine periods; in rivers, this species lives from 1 to 3 years and can form living freshwater forms. The sea lifecycle, depending on the age of the young, continues for 2.0 to 3.5 years. In the sea, the masu salmon feeds intensely on crustaceans, less often on young fish. On attaining sexual maturity, in its third to seventh years of life, it enters rivers to spawn. Its spawning run starts earlier than that of other salmon species.
After spawning, most passing fish die, and those that remain alive (preferentially dwarf males) participate in spawning the next year, too. Emerging from the nest, the young do not travel to the sea immediately, but remain in spawning areas, in the upper reaches of rivers, and on shallows with weak currents. The young move to pools and rolls of the river core to feed on chironomids, stone flies, and may fly larvae, and on airborne insects. The masu salmon travels to the ocean in its second, or occasionally even third year of life.
This salmon, like most others, is a highly commercial species caught in fisheries, raised for aquaculture, and sought after as a game fish. It is marketed fresh and frozen and is often eaten broiled or baked.
O. m. macrostomus — Red-spotted masu salmon; endemic to western Japan
O. m. formosanus — Formosan salmon, Lishan trout (Chinese: 梨山鱒) or Slamaw trout (the Tayal name for Lishan), landlocked form endemic to mountainous central Taiwan
^Froese, Rainer; Pauly, Daniel (eds.) (2014). "Oncorhynchus masou_masou" in FishBase. April 2014 version.
^Augerot, X., Atlas of Pacific Salmon, University of California Press, 2005.
^Kato, F. (1991) Life histories of masu and amago salmon (Oncorhynchus masou and Oncorhynchus rhodurus) In: Groot, C., Margolis, L.: Pacific Salmon Life Histories, UBC Press. Vancouver. pp. 449–520.
December 15, 2023
oncorhynchus, masou, masu, salmon, also, known, masu, japanese, マス, trout, cherry, trout, 桜鱒, サクラマス, sakura, masu, japan, species, salmonid, belonging, genus, oncorhynchus, found, north, pacific, along, northeast, east, asian, coasts, from, russian, east, prim. The masu salmon Oncorhynchus masou also known as masu Japanese マス lit trout or cherry trout 桜鱒 サクラマス sakura masu in Japan 1 2 is a species of salmonid belonging to the genus Oncorhynchus found in the North Pacific along Northeast East Asian coasts from the Russian Far East Primorsky Kamchatka Peninsula Sakhalin and Kuril Islands to south through Korea Japan and Taiwan Although generally accepted as a salmon in the West the fish is actually regarded as a trout in Japan its most famous native range as it is the most commonly seen freshwater salmonid in the Japanese archipelago Oncorhynchus masouJuvenile Oncorhynchus masouConservation statusEndangered IUCN 3 1 O m ishikawae Scientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClass ActinopterygiiOrder SalmoniformesFamily SalmonidaeGenus OncorhynchusSpecies O masouBinomial nameOncorhynchus masou Brevoort 1856 A number of subspecies are known including the widespread nominate subspecies yamame O m masou the critically endangered Formosan salmon O m formosanus in landlocked waters of Taiwan the Biwa trout O m rhodurus endemic of Lake Biwa and the anadromous amago O m macrostomus restricted to western Japan Contents 1 Appearance 2 Ecology 2 1 Life cycle 3 Economic importance 4 Subspecies and morphs 5 ReferencesAppearance edit nbsp Oncorhynchus masouA masu salmon which has reached sexual maturity has a darkened back and the stripes on the body sides become bright red with crimson tinge to merge on the abdomen into one common longitudinal band of lighter color For this reason it was given the name cherry salmon As adults masu salmon tend to weigh 2 0 to 2 5 kg 4 4 to 5 5 lb and measure roughly 50 cm 20 in in length 3 The maximum size that can be attained by this species which is in the region of Primorsky Krai is 71 cm 28 in long and 9 kg 20 lb in weight Ecology editOn average this salmon prefers a temperate climate around the latitude of 65 58 N and in the sea it prefers a depth of 0 200 m 0 656 ft Life cycle edit See also Salmon run Like other Pacific salmon masu salmon s biological life cycle is subdivided into freshwater and marine periods in rivers this species lives from 1 to 3 years and can form living freshwater forms The sea lifecycle depending on the age of the young continues for 2 0 to 3 5 years In the sea the masu salmon feeds intensely on crustaceans less often on young fish On attaining sexual maturity in its third to seventh years of life it enters rivers to spawn Its spawning run starts earlier than that of other salmon species After spawning most passing fish die and those that remain alive preferentially dwarf males participate in spawning the next year too Emerging from the nest the young do not travel to the sea immediately but remain in spawning areas in the upper reaches of rivers and on shallows with weak currents The young move to pools and rolls of the river core to feed on chironomids stone flies and may fly larvae and on airborne insects The masu salmon travels to the ocean in its second or occasionally even third year of life Economic importance editSee also Salmon in aquaculture This salmon like most others is a highly commercial species caught in fisheries raised for aquaculture and sought after as a game fish It is marketed fresh and frozen and is often eaten broiled or baked Subspecies and morphs edit nbsp Grilled Amago as seen in KokonoeO m masou Masu salmon anadromous sea run form landlocked populations also called yamame 山女魚 ヤマメ O m ishikawae Satsuki trout 皐月鱒 サツキマス satsuki masu black spotted form 4 landlocked populations also called amago 雨魚 アマゴ O m var iwame Iwame trout 岩女魚 イワメ recessive spotless form O m rhodurus Biwa trout in Lake Biwa of western Japan O m macrostomus Red spotted masu salmon endemic to western Japan O m formosanus Formosan salmon Lishan trout Chinese 梨山鱒 or Slamaw trout the Tayal name for Lishan landlocked form endemic to mountainous central TaiwanReferences edit Oncorhynchus masou Integrated Taxonomic Information System Retrieved 15 January 2015 Froese Rainer Pauly Daniel eds 2014 Oncorhynchus masou masou in FishBase April 2014 version Augerot X Atlas of Pacific Salmon University of California Press 2005 Kato F 1991 Life histories of masu and amago salmon Oncorhynchus masou and Oncorhynchus rhodurus In Groot C Margolis L Pacific Salmon Life Histories UBC Press Vancouver pp 449 520 Retrieved from https en wikipedia org w index php title Oncorhynchus masou amp oldid 1187436800, wikipedia, wiki, book, books, library,
