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Thymallus thymallus (Linnaeus, 1758)

Grayling
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Finland country information

Common names: Harjus
Occurrence: native
Salinity: freshwater
Abundance: common (usually seen) | Ref: Winkler, H.M., K. Skora, R. Repecka, M. Ploks, A. Neelov, L. Urho, A. Gushin and H. Jespersen, 2000
Importance: subsistence fisheries | Ref:
Aquaculture: commercial | Ref:
Regulations: restricted | Ref:
Uses: gamefish: yes;
Comments: Original populations in Vuoksi basin, North of Kuusamo and on the coast of the Gulf of Bothnia. Stocks complemented through culture of juveniles for stock enhancement (Ref. 6334). Introduced over most of southern and central Finland (Ref. 59043).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/fi.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Koli, L., 1990
National Database:

Common names from other countries

التصنيف / Names الأسماء الشائعة | مرادفات | Catalog of Fishes(جنس, الانواع) | ITIS | CoL | WoRMS | Cloffa

> Salmoniformes (Salmons) > Salmonidae (Salmonids) > Thymallinae
Etymology: Thymallus: Greek, thymallos, -ou = a kind of fish similar to salmon (Ref. 45335);  thymallus: The name 'thymallus' could come from the thyme taste of the flesh of this fish (Ref. 30578).
  More on author: Linnaeus.

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

; المياه العذبة; مياه مخلوطة قاعية التغذية و المعيشة; pH range: 7.0 - 7.5; dH range: 20 - ?; غير مهاجرة; نطاق العمق 15 - ? m (Ref. 30578).   Temperate; 6°C - 18°C (Ref. 2059); 70°N - 42°N, 6°W - 66°E

التوزيع دول | مناطق الفاو | النظام البيئي | الظهور | Point map | مقدمة | Faunafri

Europe: Barent Sea basin west of Urals, Caspian, Black, Baltic, White and North Sea basins, Atlantic westward to Loire drainage; Rhône drainage; northern Adriatic basin east to Soca drainage. Introduced over most of southern and central Finland.

Length at first maturity / الحجم / وزن / العمر

Maturity: Lm ?  range ? - ? cm
Max length : 60.0 cm TL ذكر/ مختلط الجنس; (Ref. 556); common length : 30.0 cm TL ذكر/ مختلط الجنس; (Ref. 556); أعلا وزن تم نشرة: 6.7 kg (Ref. 6368); العمر: 14 سنين (Ref. 556)

وصف مختصر مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي

الأشواك الظهرية (المجموع) : 5 - 8; الأشعة الظهرية الناعمة (المجموع) : 12 - 17; شوكة شرجية: 3 - 4; أشعه شرجية لينه: 9 - 10; فقرات: 57 - 61. Distinguished from Thymallus arcticus by the following unique characters: maxillary usually reaching anterior margin of eye; pelvic fin grey, lacking red stripes; body without red spots; dorsal fin greyish, with parallel rows of round dark spots; gill rakers 19-30, averaging about 24-26 (Ref. 59043). Caudal fin with 19 to 21 rays (Ref. 2196).

أحياء     المصطلحات (على سبيل المثال epibenthic)

Inhabits submontane reaches of rivers with a hard sand or stone bottom and well oxygenated, cold and fast-flowing water (Ref. 59043). Prefers running, well-oxygenated waters of rivers (Ref. 30578). In Scandinavia, it occurs in clear lakes and freshened part of northern Baltic basin. Usually lives in hollows behind boulders and shaded water under overhanging vegetation (Ref. 59043). Gregarious, forms schools (Ref. 2196). Feeds mainly on insects (Ref. 9696), nymphs, small worms and crustaceans (Ref. 30578). Breeds in shallow stretches, usually 20-40 cm deep, or riffles, with moderate current of about 0.5 m/s and clean gravel bottom (Ref. 59043). Can be captured with natural bait (insect larvae) or with artificial fly. Very sensitive to pollution (Ref. 30578).

Life cycle and mating behavior Maturities | التكاثر | Spawnings | Egg(s) | Fecundities | Larvae

المرجع الرئيسي Upload your references | مراجع | المنظم | المتعاونين

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)

  Least Concern (LC) ; Date assessed: 05 March 2010

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

خطر للأنسان

  Harmless




استخدامات بشرية

مصائد: تجاري; الأستزراع المائي: تجاري; لعبة سمكه: نعم; حوض مائي: احواض مائية عامة
FAO(Aquaculture systems: الأنتاج; مصائد: الأنتاج; publication : search) | FishSource |

مزيد من المعلومات

Trophic ecology
عناصر الغذاء
Diet compositions
Food consumptions
Food rations
مفتريسات
Ecology
البيئة
Home ranges
Population dynamics
Growths
Max. ages / sizes
Length-weight rel.
Length-length rel.
الطول- الترددات
Mass conversions
Recruitments
Abundances
Life cycle
التكاثر
Maturities
Fecundities
Spawnings
Spawning aggregations
Egg(s)
Egg developments
Larvae
حركة انتقال اليرقات
Anatomy
Gill areas
دماغ
عظمة الأذن
Physiology
Body compositions
Nutrients
Oxygen consumptions
نوع السباحة
Swimming speeds
Visual pigment(s)
أصوات الأسماك
Diseases / Parasites
Toxicities (LC50s)
Genetics
جيني
Electrophoreses
Heritabilities
Human related
Aquaculture systems
ملامح تربية الأحياء المائية
سلالات
Ciguatera cases
Stamps, coins, misc.
References
مراجع

أدوات

تقارير خاصة

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مصادر علي الأنترنت

Alien/Invasive Species database | Aquatic Commons | BHL | Cloffa | Websites from users | البحث في مراقبي الأسماك | CISTI | Catalog of Fishes(جنس, الانواع) | DiscoverLife | DORIS | ECOTOX | Faunafri | Fishtrace | GenBank(الوراثة, نيوكلوتيدة) | GloBI | GOBASE | | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | قاعدة البينات الوطنية | Otolith Atlas of Taiwan Fishes | احواض مائية عامة | PubMed | Reef Life Survey | Scirus | SeaLifeBase | شجرة الحياة | Wikipedia(ذهب, بحث) |
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World Records Freshwater Fishing | سجلات علم الحيوانات

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5001   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00776 (0.00564 - 0.01068), b=3.06 (2.97 - 3.15), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
مستوى غذائي (Ref. 69278):  3.1   ±0.42 se; based on food items.
المرونه (Ref. 120179):  وسيط, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 1.4-4.4 سنة (K=0.12-0.26; tm=2-6; tmax=14).
Fishing Vulnerability (Ref. 59153):  High vulnerability (56 of 100).
فئة السعر (Ref. 80766):   Very high.