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Salmoniformes (Salmons) >
Salmonidae (Salmonids) > Coregoninae
Etymology: Stenodus: Greek, stenos = narrow + Greek, odous = teeth (Ref. 45335); leucichthys: leucichthys meaning white fish (Ref. 1998).
Issue
Stenodus nelma (Pallas, 1773) is a valid species according to Kottelat and Freyhof (2007: Ref. 82592). The corresponding species summary page will be created in the future.
Environment: milieu / climate zone / depth range / distribution range
বাস্তুসংস্থান
সামুদ্রিক; স্বাদু পানি; ঈষৎ লোনা তলদেশ বিহারী; এ্যানাড্রমাস (Ref. 51243); গভীরতার পরিসীমা 10 - ? m (Ref. 4779). Boreal; 73°N - 58°N, 36°E - 111°W
North America: Arctic drainages from Anderson River in Northwest Territories, Canada to Kuskokwim River (Bering Sea tributary) in Alaska. Upstream in Mackenzie River and Yukon River drainages to British Columbia, Canada (Ref. 5723). Eurasia: Caspian Sea (common in central and southern Caspian in summer), Volga, Ural and Terak drainages (Ref. 59043). Hybridization with Coregonus nelsoni, Coregonus autumnalis and Coregonus muksun are due more to the broadcasting of eggs and sperm rather than pairing between species or genera (Ref. 27547).
Length at first maturity / আকৃতি / ওজন / Age
Maturity: Lm 72.5, range 70 - 75 cm
Max length : 150 cm TL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 4574); common length : 61.0 cm TL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 12193); সবের্াচ্চ প্রকাশিত ওজন : 40.0 kg (Ref. 10318); সর্বোচ্চ উলি্ল্লখিত বয়স : 22 বৎসর (Ref. 4576)
পৃষ্ঠীয় কাঁটা (মোট ) : 0; পৃষ্ঠীয় নরম পাখনা দন্ড (মোট ) : 11 - 19; পায়ূ কাঁটা : 0; পায়ূর নরম পাখনা্তুন্ড: 14 - 19; কশেরুকা : 63 - 69. Distinguished by its large mouth, the protruding lower jaw, and the presence of only 13 to 17 gill rakers on the lower limb of the first gill arch (Ref. 27547). Dorsal fin high and pointed; pelvic fins with well developed axillary process (Ref. 27547). Generally silvery, with the back usually rather green, blue or pale brown; silvery white below; dorsal and caudal fins have dusky margins, other fins pale (Ref. 27547).
Nerito-pelagic (Ref. 58426). Occurs in coastal brackish waters near mouths of rivers, but usually in rivers or some land-locked lakes (Ref. 4779). At the sea, it is found throughout basin in pelagic zone with temperatures below 18° C and 20-50 m deep (Ref. 59043). Juveniles and adult overwinter and forage at the sea. Encountered in large lowland rivers during migration (Ref. 59043). Adults feed mostly on small fishes; young eat aquatic insect larvae and planktonic crustaceans (Ref. 4779). During spawning migration, it feeds little if at all (Ref. 27547). Spawns on gravel shallows (Ref. 59043). Flesh is white, sweet and slightly oily (Ref. 27547). Sold fresh or frozen.
Upstream migration from wintering areas begins at ice break-up. Early upstream movement may be associated with feeding, but movement soon becomes a definite migration to the spawning area. Spawning begins at dusk, and continuing well into the night. A female accompanied by a male, swims to the surface near the upstream end of the spawning ground. She rapidly moves across the current, extruding her eggs. The male, stays below the female so that as the eggs sink, sperm released, fertilizes the eggs. After completing a spawning pass, the female drifts downstream. She may repeat the spawning act over the downstream portion of the spawning area or may move upstream to the head of the grounds before releasing more eggs. Following spawning, there is a fairly rapid downstream migration to wintering grounds (Ref. 27547). It is not certain if spawning occurs annually or at longer intervals (Ref. 27547). Russian fish appear to spawn only every third or fourth year (Ref. 28219). Spawning frequency at Selawik, Alaska may be every other year (Ref. 27547).
Svetovidov, A.N., 1984. Salmonidae. p. 373-385. In P.J.P. Whitehead, M.-L. Bauchot, J.-C. Hureau, J. Nielsen and E. Tortonese (eds.) Fishes of the north-eastern Atlantic and the Mediterranean. UNESCO, Paris. vol. 1. (Ref. 4779)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
মৎস্য: গৌণ বাণিজ্যিক ; এ্যাকুয়াকালচার (জলজ পালন) : বাণিজ্যিক; শিকারযোগ্য মাছ: হঁ্যা
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ইন্টারনেট সুত্র
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00479 (0.00394 - 0.00581), b=3.18 (3.13 - 3.23), in cm total length, based on LWR estimates for this species (Ref.
93245).
ট্রফিক পর্যায়ে (Ref.
69278): 4.1 ±0.74 se; based on food items.
Generation time: 14.7 (8.1 - 19.6) years. Estimated as median ln(3)/K based on 10
growth studies.
স্থিতিস্থাপক (Ref.
120179): নিম্ন/ , সর্বনিম্ন প্রজন দ্বিগুনের সময় ৪.৪-১৪ বৎসর (K=0.05-0.10; tm=5-12; tmax=22; Fec=80,000).
Prior r = 0.42, 95% CL = 0.28 - 0.63, Based on 2 data-limited stock assessments.
Fishing Vulnerability (Ref.
59153): High to very high vulnerability (74 of 100).
Nutrients (Ref.
124155): Calcium = 10.3 [5.6, 24.2] mg/100g; Iron = 0.409 [0.208, 0.798] mg/100g; Protein = 18.8 [17.2, 20.2] %; Omega3 = 0.565 [0.227, 1.537] g/100g; Selenium = 17.9 [7.4, 43.7] μg/100g; VitaminA = 8.75 [1.47, 53.62] μg/100g; Zinc = 0.304 [0.204, 0.438] mg/100g (wet weight); based on
nutrient studies.
