Alosa immaculata, Pontic shad : fisheries

Alosa immaculata Bennett, 1835

Pontic shad
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Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Alosa immaculata   AquaMaps   Data sources: GBIF OBIS
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Image of Alosa immaculata (Pontic shad)
Alosa immaculata
Photo von Kutsarov, Y.

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> Clupeiformes (Herrings) > Alosidae (Shads and Sardines)
Etymology: Alosa: Latin, alausa = a fish cited by Ausonius and Latin, halec = pickle, dealing with the Greek word hals = salt; it is also the old Saxon name for shad = "alli" ; 1591 (Ref. 45335).
More on author: Bennett.

Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet Ökologie

seewasser; süßwasser; brackwasser pelagic-neritic; anadrom (Ref. 138126); tiefenbereich 3 - 90 m (Ref. 10439). Temperate; 50°N - 41°N, 27°E - 44°E

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Eurasia: Black Sea and Sea of Azov ( in sea and in the Don, Danube and other rivers, as much as 567 km up the Don and as far as Kiev on the Dneiper before the dam was built). Recognized sub-species (Ref. 683): Alosa pontica pontica in the Black Sea and rivers feeding it; Alosa pontica kessleri and Alosa pontica volgensis in the Caspian Sea.

Größe / Gewicht / Alter

Geschlechtsreife: Lm ?  range ? - 23.4 cm
Max length : 39.0 cm SL Männchen/unbestimmt; (Ref. 188); max. veröff. Alter: 7 Jahre (Ref. 10439)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 0; Afterflossenstacheln: 0. Body fairly elongate, more `herring-like' than `shad-like'. Gill rakers rather thin, usually equal to or a little shorter than gill filaments. Teeth well developed in both jaws. Resembles A. caspia, which usually has more Gill rakers (50 to 180, much longer than gill filaments), poorly developed teeth and a deeper, `shad-like' body; A. maeotica has fewer Gill rakers (33 to 36).
Body shape (shape guide): fusiform / normal; Cross section: compressed.

Biologie     Fachlexikon (Englisch) (z.B. epibenthic)

Thai species is pelagic at sea, in deep water. It migrates to middle reaches of large rivers, spawning where current is strongest, close to the surface, often at 2-3 m depth in the main channel. Migrates upriver to spawn at 3 years, rarely earlier and only a few individuals spawn two seasons. It appears along the coast in March to April, enters rivers when temperatures reach about 6-9°C, between late March and late April; migration usually peaks in May. Spawning starts when temperature rises above 15°C in April to August; usually between 1 and 8 p.m. Pelagic eggs. Spent individuals return to the sea to feed. Juveniles inhabit floodplain and shallow riverine habitats, migrate to the sea or estuarine habitats during first summer; in autumn return to the sea until maturity. When at sea, it feeds on a wide variety of zooplankton (mainly crustaceans, (Crangon, Upogebia, Idothea, gammarids) and small fish (Engraulis, Clupeonella, Sprattus). Reduction of spawning sites and migration routes are caused by impoundment of main rivers. Heavy over fishing apparently reduced all populations during the first decade of the 20th century (Ref. 59043). Reaches a smaller size (30 cm SL, usually 14-18) in Don River; a smaller form reaches only 21 cm.

Lebenszyklus und Paarungsverhalten Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven

Eggs are pelagic (Ref. 59043).

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Kottelat, M., 1997. European freshwater fishes. An heuristic checklist of the freshwater fishes of Europe (exclusive of former USSR), with an introduction for non-systematists and comments on nomenclature and conservation. Biologia, Bratislava, 52/Suppl. 5:1-271. (Ref. 13696)

IUCN Rote Liste Status (Ref. 130435: Version 2025-2 (Global))

  nicht bedroht (LC) ; Date assessed: 28 June 2022

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

Fischereien: weniger kommerziell
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Schätzungen auf der Grundlage von Modellen

Phylogenetischer Diversitätsindex
(Ref. 82804) 		PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00741 (0.00618 - 0.00889), b=3.08 (3.04 - 3.12), in cm total length, based on LWR estimates for this species (Ref. 93245).
Trophische Ebene
(Ref. 69278) 		4.0   ±0.6 se; based on diet studies.
Widerstandsfähigkeit
(Ref. 120179) 		mittel, Verdopplung der Population dauert 1,4 - 4,4 Jahre. (K=0.32; tm=2; tmax=9).
Anfälligkeit der Fischerei
(Ref. 59153) 		Low to moderate vulnerability (35 of 100). 🛈
Klimaanfälligkeit
(Ref. 125649) 		High to very high vulnerability (67 of 100). 🛈
Preiskategorie
(Ref. 80766) 		High.
Nährstoffe
(Ref. 124155) 		Calcium = 14.6 [7.1, 77.2] mg/100g; Iron = 0.56 [0.23, 1.34] mg/100g; Protein = 19.6 [17.1, 22.4] %; Omega3 = 1.44 [0.75, 2.79] g/100g; Selenium = 9.61 [4.44, 21.22] μg/100g; VitaminA = 17.7 [4.5, 66.4] μg/100g; Zinc = 0.335 [0.208, 0.588] mg/100g (wet weight); based on nutrient studies.