Common names from other countries
Environment: milieu / climate zone / depth range / distribution range
বাস্তুসংস্থান
; স্বাদু পানি; ঈষৎ লোনা ভাসমান; পোটামোড্রোমাস (Ref. 51243); গভীরতার পরিসীমা 2 - 30 m (Ref. 30578), usually 2 - 3 m (Ref. 27368). Temperate; 6°C - 22°C (Ref. 2059); 67°N - 36°N, 1°W - 75°E
Europe and Asia: Caspian, Baltic, Black and Aral Sea basins; Elbe (North Sea basin) and Maritza (Aegean basin) drainages. North to about 65° N in Finland. Introduced widely (Ref. 59043). Several countries report adverse ecological impact after introduction (Ref. 1739).
Length at first maturity / আকৃতি / ওজন / Age
Maturity: Lm 37.2, range 28 - 46 cm
Max length : 100.0 cm SL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 59043); common length : 50.0 cm TL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 556); সবের্াচ্চ প্রকাশিত ওজন : 20.0 kg (Ref. 40476); সর্বোচ্চ উলি্ল্লখিত বয়স : 17 বৎসর (Ref. 59043)
পৃষ্ঠীয় কাঁটা (মোট ) : 13 - 20; পৃষ্ঠীয় নরম পাখনা দন্ড (মোট ) : 18 - 24; পায়ূ কাঁটা : 2 - 3; পায়ূর নরম পাখনা্তুন্ড: 10 - 14; কশেরুকা : 45 - 47. Distinguished from congeners in Europe by the following combination of characters: 1-2 enlarged canine teeth in anterior part of each jaw; second dorsal fin with 18-22½ branched rays; and 80-97 scales on lateral line (Ref. 59043).
Adults inhabit large, turbid rivers and eutrophic lakes, brackish coastal lakes and estuaries. Feed mainly on gregarious, pelagic fishes. They attain first sexual maturity at 3-10 years of age, usually at 4. Undertake short spawning migrations. Individuals foraging in brackish water move to freshwater habitats. Migrations up to 250 km have been recorded. Homing is well developed, even nearby populations may be relatively isolated. Spawn in pairs at dawn or night. Spawning occurs in April-May, exceptional from late February until July, depending on latitude and altitude when temperatures reach 10-14° C on spawning grounds (Ref. 59043). Popularly fished by sport fishers. Its flesh is succulent (Ref. 30578). Utilized fresh or frozen and eaten steamed, broiled and microwaved (Ref. 9988). An individual weighing 19 kg was reportedly caught in 1959 in Starnberger, Bavaria, Germany (Peter Admicka, pers. Comm. E-mail: peter.adamicka@oeaw.ac.at).
The spawning places are over gravel in moving water (Ref. 205). "Males are territorial and excavate shallow depressions about 50 cm in diameter and 5-10 cm deep in sand or gravel, or among exposed plant roots on which eggs are deposited, usually in turbid water and at 1-3 m depth. Spawn in pairs, at dawn or night. The female remains over the nest while the male circles rapidly around, at about 1 meter from the nest. Then male takes a vertical orientation and both swim around swiftly, and eggs and sperm are released, The female leaves the nest after all eggs are released. The male defends the nest and fans the eggs with his pectorals. Females spawn once a year, laying all the eggs at one time (Ref. 88075). Feeding larvae are positively phototactic and feed on pelagic organisms after they leave the nest for open water" (Ref. 59043).
Kottelat, M. and J. Freyhof, 2007. Handbook of European freshwater fishes. Publications Kottelat, Cornol and Freyhof, Berlin. 646 pp. (Ref. 59043)
IUCN Red List Status (Ref. 130435)
CITES (Ref. 128078)
Not Evaluated
Threat to humans
Potential pest (Ref. 57271)
Human uses
মৎস্য: বাণিজ্যিক; এ্যাকুয়াকালচার (জলজ পালন) : বাণিজ্যিক; শিকারযোগ্য মাছ: হঁ্যা ; মৎস্যাধার / এ্যাকুয়ারিয়াম : পাবলিক এ্যাকুয়ারিয়াম
হাতিয়ার
Special reports
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ইন্টারনেট সুত্র
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00589 (0.00495 - 0.00701), b=3.12 (3.07 - 3.17), in cm Total Length, based on LWR estimates for this species (Ref.
93245).
ট্রফিক পর্যায়ে (Ref.
69278): 4.0 ±0.78 se; based on food items.
স্থিতিস্থাপক (Ref.
120179): নিম্ন/ , সর্বনিম্ন প্রজন দ্বিগুনের সময় ৪.৪-১৪ বৎসর (K=0.10-0.24; tmax=16; Fecundity=10,000).
Fishing Vulnerability (Ref.
59153): High vulnerability (62 of 100).
