Environment: milieu / climate zone / depth range / distribution range
Ecologia
; Água doce; estuarina bentopelágico. Subtropical
Europe and Asia: freshened areas of Black and Azov Seas, entering Don, Kuban, Dniepr, Dniestr and rarely Danube drainages.
Tamanho / Peso / Idade
Maturity: Lm ? range ? - ? cm
Max length : 43.0 cm SL macho/indeterminado; (Ref. 59043)
Descrição suscinta
Chaves de identificação | Morfologia | Morfometria
Diagnosed from its congeners in Black Sea basin by having the combination of the following characters: laterally compressed body; 39-41 + 2-3 scales along lateral line; dorsal and anal fins usually with 10½ branched rays; mouth inferior; iris from silvery to yellow; pectoral, pelvic and anal fins grey with dark margins; and breeding males with scattered tubercles on head and a tubercle on each flank scale (Ref. 59043).
A semi-anadromous species. Occurs mostly in shallow brackish coastal waters. While at sea, adults are most abundant at depth of 2.5-4.0 m and salinity of 2-4 ppt. Enters freshwater of estuaries, lagoons and lower reaches of large rivers to spawn. Commences movement to coast in August and to rivers in September, with a peak in October. Stops migration by end of November and overwinters in main river or estuaries. Continues spawning migration with breaking up of ice in March (Dniepr). Breeds in April-May. Adults migrate back to estuaries to forage immediately after spawning. Juveniles move to estuaries during first summer in August. Reported decline was due to blocking of almost all spawning rivers and decline of brackish areas in Black Sea basin (Ref. 59043).
Ciclo de vida ou comportamento de acasalamento
Maturities | Reprodução | Spawnings | Egg(s) | Fecundities | Larvas
Kottelat, M. and J. Freyhof, 2007. Handbook of European freshwater fishes. Publications Kottelat, Cornol and Freyhof, Berlin. 646 pp. (Ref. 59043)
Status na Lista Vermelha da UICN (Ref. 130435)
Ameaça para os humanos
Harmless
Uso pelos humanos
Ferramentas
Relatórios especiais
Baixar XML
Fontes da internet
Estimates based on models
Índice de diversidade filogenética (Ref.
82804): PD
50 = 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00434 - 0.02305), b=3.02 (2.81 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Nível Trófico (Ref.
69278): 3.4 ±0.5 se; based on size and trophs of closest relatives
Resiliência (Ref.
120179): Baixo, tempo mínimo de duplicação da população 4,5 - 14 anos (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (41 of 100).
