Alosa tanaica, Black Sea shad

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Alosa tanaica (Grimm, 1901)

Black Sea shad
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Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
Alosa tanaica   AquaMaps   Data sources: GBIF OBIS
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Image of Alosa tanaica (Black Sea shad)
Alosa tanaica
Picture by Otel, V.

Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

> Clupeiformes (Herrings) > Clupeidae (Herrings, shads, sardines, menhadens) > Alosinae
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).

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

; marien; zoetwater; brakwater; anadroom (Ref. 51243); diepteverspreiding 50 - 70 m (Ref. 59043). Temperate; 49°N - 36°N, 27°E - 54°E

Verspreiding Landen | FAO regio's | Ecosystems | Voorkomen | Point map | Introducties | Faunafri

Eurasia: Black Sea and Sea of Azov from where adults ascend rivers, migrating a short distance upstream to spawn.

Size / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 24.6 cm TL mannelijk/geslacht niet bekend; (Ref. 59105); Maximaal gepubliceerd gewicht: 59.00 g (Ref. 593)

Korte beschrijving Morfologie | Morfometrie

Distinguished from its congeners entering freshwater in Black Sea basins by having 66-96 gill rakers, longer than branchial filaments and poorly-developed teeth on palatine and vomer (Ref. 59043).

Biologie     Verklarende woordenlijst (b.v. epibenthic)

This species migrates from sea to mouth and lower reaches of large rivers (at 1-2 years) and spawns in fresh or slightly brackish water, usually close to the shore, upper 2-4 m, in almost still water bodies as flood plains or lakes. Many individuals spawn 2-4 seasons and spawners appear along the coast in late January to March, enter rivers when temperature reaches about 10°C in late April to May, and spawns at about 15°C or beyond in May to June. Eggs are bathypelagic or sink to bottom. Spent fish migrate to estuarine and coastal lagoons or to sea near river mouths to feed and in autumn, move to sea near river mouths to overwinter. Juveniles migrate to sea or estuaries during first summer and remain there until maturity. At sea, feeds on a wide variety of zooplankton (crustaceans), insect larvae and small fish. Populations seem to have stabilized at moderate level after most have declined during the first decades of 20th century due to water pollution. In northern Black Sea, immediate impact is foreseen due to the decline in habitat quality in suitable estuarine ecosystems. On the other hand, the species is still abundant in Azov Sea basin (Ref. 59043).

Life cycle and mating behavior Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven

Juveniles migrate to sea or estuaries during their first summer, remaining there until they mature. After 1-2 years, they migrate upriver to breed. Spawners appear along the coast in late January-March, enter rivers when temperature reaches about 10°C, in late April and May. Spawning occurs from May to June on or above 15°C. Spent individuals migrate to estuaries and coastal lagoons or to sea near river mouths to feed. In autumn, they move to the sea to overwinter (Ref. 59043).

Voornaamste referentie Upload your references | Referenties | Coördinator | Medewerkers

Berg, L.S., 1962. Freshwater fishes of the U.S.S.R. and adjacent countries. volume 1, 4th edition. Israel Program for Scientific Translations Ltd, Jerusalem. (Russian version published 1948). (Ref. 593)

Status op de Rode Lijst van het IUCN (Ref. 125652)

  Niet bedreigd (LC) ; Date assessed: 01 January 2008

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Harmless





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Estimates based on models

Preferred temperature (Ref. 115969): 7.6 - 12, mean 7.6 °C (based on 6 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00776 (0.00454 - 0.01328), b=3.07 (2.92 - 3.22), in cm total length, based on LWR estimates for species & Genus-BS (Ref. 93245).
Trophic level (Ref. 69278):  3.6   ±0.4 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref. 120179):  Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low to moderate vulnerability (30 of 100) .
Climate Vulnerability (Ref. 125649):   (0 of 100) .