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Salmo salar Linnaeus, 1758

Atlantic salmon
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Image of Salmo salar (Atlantic salmon)
Salmo salar
Picture by Helgesson, D.

Classification / Names ชื่อสามัญ | ชื่อพ้อง | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

กลุ่มปลาที่มีครีบคู่ แผ่แบนออกได้ลักษณะคล้ายพัด > Salmoniformes (Salmons) > Salmonidae (Salmonids) > Salmoninae
Etymology: Salmo: Latin, salmo, Plinius = salmon (Ref. 45335);  salar: From the Latin 'salio' meaning to leap (Ref. 6885).  More on author: Linnaeus.

Environment: milieu / climate zone / depth range / distribution range นิเวศวิทยา

; เกี่ยวกับทะเล,น้ำเค็ม; น้ำจืด; กร่อย กลุ่มสัตว์หน้าดิน,กลุ่มสัตว์พื้นท้องน้ำ; ปลาที่อพยพจากแหล่งน้ำเค็มไปวางไข่ในแหล่งน้ำจืด (Ref. 92381); ระดับความลึก 0 - 210 m (Ref. 57178), usually 10 - 23 m.   Temperate; 2°C - 9°C (Ref. 36794); 72°N - 40°N, 80°W - 61°E (Ref. 54253)

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North Atlantic Ocean: temperate and arctic zones in northern hemisphere (Ref. 51442). Western Atlantic: Atlantic drainages from northern Quebec, Canada, to Connecticut and New York, USA; inland to Lake Ontario where it is now extirpated (Ref. 86798). Landlocked stocks are present in North America (Ref. 1998). Eastern Atlantic: White and Barents Sea basins through northeastern Europe to the Baltic and North Sea basins, including Iceland (Ref. 59043). Introduced to New Zealand, Chile, southern Argentina (Ref. 59043) and Australia (Ref. 6390). Listed in Appendix III of the Bern Convention (2002) (freshwater only). Listed in Annex II (freshwater only; excluding Finnish population) and V (freshwater only) of the EC Habitats Directive (2007).

Length at first maturity / ขนาด / น้ำหนัก / Age

Maturity: Lm 73.1  range ? - ? cm
Max length : 150 cm TL เพศผู้/กระเทย; (Ref. 7251); 120.0 cm TL (female); common length : 38.0 cm TL เพศผู้/กระเทย; (Ref. 3561); น้ำหนักสูงสุดที่มีการรายงาน: 46.8 kg (Ref. 41037); อายุสูงสุดที่ได้รายงาน: 13 ปี (Ref. 274)

Short description สัณฐานวิทยา | ความยาวต่างๆ

เงี่ยงครีบหลัง (รวม): 3 - 4; ก้านครีบอ่อนที่หาง (รวม): 9-15; เงี่ยงครีบก้น 3-4; ก้านครีบอ่อนที่ก้น: 7 - 11; สัตว์มีกระดูกสันหลัง: 58 - 61. Distinguished from congeners by having the following unique characters: 10-13 scales between end of adipose base and lateral line; 17-24 gill rakers (Ref. 59043); caudal fin deeply forked in individuals smaller than 20 cm SL; hyaline or grey adipose margin; posterior part of vomer toothless (Ref. 59043). Mouth extends only to area below rear of eye and has well developed teeth (Ref. 51442). Vomerine teeth weak (Ref. 7251). Caudal fin with 19 rays (Ref. 2196). Little scales (Ref. 51442). Juveniles have 8-12 blue-violet spots on the flanks with little red spots in-between (Ref. 51442). Adults at sea are bluish-green dorsally becoming silvery along the sides and white ventrally; with a few black spots but none under lateral line (Ref. 37032, Ref. 51442). Caudal fin usually unspotted and adipose fin not black bordered. During reproduction individuals lose the silvery shine and become dull brown or yellowish. Males may be mottled with red or have large black patches (Refs. 37032, 51442, 88171). Skin becomes thick and leathery. Survivors lose their spawning coloration and are generally dark in colour (Ref. 84357). During the spawning season, males are characterized by elongated hooked jaws that meet at the tips, thicker fins, and slime covering their body. Hook of males dwindle after spawning (Ref. 35388).

ชีววิทยา     ภาคผนวก (เช่น epibenthic)

Amphihaline species, spending most of its life in freshwater (Ref. 51442). Occurs in lakes and rocky runs and pools of small to large rivers (Ref. 86798). Some landlocked populations exist. Found in all rivers where temperature rises above 10° C for about 3 months per year and does not exceed 20° C for more than a few weeks in summer (Ref. 59043) (preferred temperatures 4-12°C). Juveniles may live in cold lakes in northern Europe (Ref. 59043). Parr (i.e. juveniles) are territorial and are found in the upper reaches of rivers and streams, in riffle areas with strong current and rough gravel bottoms (Ref. 7471). During winter, parr seek refuge in small spaces or under stones during the day (Refs. 59043, 89461). Young remain in freshwater for 1 to 6 years, then migrate to coastal marine waters or even to open oceans where they remain for 1 to 4 years before returning to freshwater for spawning (Ref. 51442). Adults inhabit cooler waters with strong to moderate flow (Ref. 44894). The Atlantic salmon is reported to live up to 10 years, but most individuals only reach 4-6 years (Ref. 88187). Juveniles feed mainly on aquatic insects, mollusks, crustaceans and fish; adults at sea feed on squids, shrimps, and fish (Ref. 51442). Most populations depend mostly or exclusively on stocking due to degradations of environmental conditions. Fishing pressure on wild stocks has decreased due to intensive farming but other problems have increased. Farmed salmons escape in large numbers and move to any river and hybridize with wild stocks (Ref. 59043). This species may hybridize with trout (Salmo trutta) (Ref. 59043). Diseases of the species include furunculosis (Aeromonas salmonicida), corynebacterial kidney disease (Renibacterium salmoninarum), enteric red mouth disease (Yersinia ruckeri), infectious pancreatic necrosis virus, bacterial kidney disease, fin rot and fungus infections (Ref. 5951). Marketed fresh, dried or salted, smoked, and frozen; eaten steamed, fried, broiled, cooked in microwave, and baked (Ref. 9988).

Life cycle and mating behavior วัยเจริญพันธุ์ | การสืบพันธุ์ | การวางไข่ | เซลสืบพันธ์ของเพศเมีย(ไข่) | ความดกของไข่ | ตัวอ่อน

At the onset of sexual maturity this species is known to return from the ocean to the river where it was born, and even to its specific natal site (Refs. 7471, 51442). Lacustrine populations move to tributaries (Ref. 59043). Spawning migration into freshwater lasts from June to November. Spawns at 6-10°C (Ref. 89464) in gravel river areas far upstream with moderate to fast-flowing, well-oxygenated waters and a succession of riffles and pools (Refs. 6390, 59043). The female selects a site where the gravel is of the right size and of sufficient depth (0.1 to 0.3 m) (Refs. 7471, 51442) and water depth is around 0.5-3 m (Ref. 35387). The female digs a depression ("redd") by turning on her side and flexing her body up and down, without touching the stones (Ref. 36794). This species spawns in pairs. The male guards and defends the female against other males (Ref. 59043). A female releases between 8,000-25,000 eggs during a spawning season (Ref. 7471, 88187); 500 to 2000 per kg (Ref. 51442). Fertilized eggs sink into the redd and are covered with a layer of gravel (0.1-0.3 m) usually by the male (Refs. 7471, 59043). Females are also observed to cover the eggs. Individual spawning is completed in 2-3 days (Ref. 7471) after a female digging several redds and spawning with several males. Period of spawning lasts for 1-2 weeks. Most males die after spawning, while 10-40% of females may survive and return to the sea in autumn or overwinter in rivers, feed one summer, and migrate again. They may spawn in the year following the first reproduction or may remain at sea for 18 months before returning once more to the river. Of the returning females, about 0.3-6 % spawn a second time and very few spawn a third or fourth time. In short rivers with presumably less exhaustive upstream migration, up to 34% of returning individuals spawn a second time; some individuals may spawn for up to six seasons (Ref. 59043). Eggs hatch in spring, usually after 70-160 days (Ref. 59043). Upon hatching, alevins (i.e. newly-hatched young up to 1 month) are negatively phototactic and move deeper into the gravel (Refs. 58137, 59043). As their yolk sac is absorbed, the fry emerge from the bottom and move to shallow riffles just downstream of their redd (Ref. 59043). Mortality of young individuals during the first months may range from 14-61 % (Ref. 89465). Parr (i.e. juveniles) may remain in freshwater environments for 1-7 years (depending on temperature and feeding conditions) but most stay for 2-3 years. Parr undergo morphological and physiological changes called smoltification which prepares them for life in the sea. At the southern end of their range, many reach a length of 12-15 cm, transform into smolts and are ready for migration in spring of the first year after hatching (Refs. 7471, 51442). At the northern end of the range they may take 5-6 years to reach smolt stage (Ref. 36794). Smolts move towards estuaries, the continental shelf and eventually the open ocean (Ref. 89462). The Atlantic salmon matures between 3-7 years (Ref. 41851). After 1-4 years at sea, it migrates back to the upper reaches of its natal river to spawn (Refs. 59043, 89461). It has an acute sense of smell and it is suggested that it imprints a sequence of odours while inhabiting rivers and during its smolt run. It presumably reverses this sequence to return to its natal site (Ref. 89461). Several studies have shown that smolt runs are strongly correlated to increasing water temperature and water flow during spring (Ref. 89461). There is little evidence of natural spawning by land-locked populations of Atlantic salmon in Australia, and populations are maintained by stocking (Ref. 6390, 26519).

Main reference Upload your references | อ้างอิง | ผู้ประสานงาน | ผู้ร่วมมือ

Page, L.M. and B.M. Burr, 2011. A field guide to freshwater fishes of North America north of Mexico. Boston : Houghton Mifflin Harcourt, 663p. (Ref. 86798)

IUCN Red List Status (Ref. 119314)

  Lower Risk: least concern (LR/lc) ; Date assessed: 01 August 1996

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





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Estimates of some properties based on models

Preferred temperature (Ref. 115969): 1.5 - 15.3, mean 9.3 (based on 1857 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01047 (0.00860 - 0.01275), b=3.02 (2.98 - 3.06), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
ระดับชั้นอาหาร (Ref. 69278):  4.5   ±0.3 se; Based on diet studies.
ความสามารถในการกลับคืนสู่ปกติ (Ref. 69278):  ขนาดกลาง, เวลาต่ำสุดที่จะทำให้ประชากรเพิ่มขึ้นเป็น 2 เท่าใช้เวลา 1.4 - 4.4 ปี (K=0.1-0.2; tmax=6; Fecundity=1,600).
Prior r = 0.39, 95% CL = 0.26 - 0.61, Based on 5 stock assessments.
Vulnerability (Ref. 59153):  High vulnerability (62 of 100) .
Price category (Ref. 80766):   Very high.