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Alosa sapidissima (Wilson, 1811)

American 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 sapidissima   AquaMaps   Data sources: GBIF OBIS
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Image of Alosa sapidissima (American shad)
Alosa sapidissima
Picture by Flescher, D.


United States (contiguous states) country information

Common names: American shad, American shad, Atlantic shad
Occurrence: native
Salinity: freshwater
Abundance: common (usually seen) | Ref: Page, L.M. and B.M. Burr, 2011
Importance: commercial | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: gamefish: yes;
Comments: Occurs in the Atlantic Coast from Maine to St. Johns River, Florida and ascends coastal rivers during spring spawning migrations. Introduced into Sacramento River, California in 1870s and has spread along Pacific Coast from Washington to California. Landlocked in Millerton Lake, California (Ref. 86798). Game fish in the east coast. Also caught in the Middle Atlantic, Southern New England, Gulf of Maine, and inshore north of Cape Hatteras (Ref. 37512). Distributed virtually in all streams tributary to Chesapeake Bay (Ref. 38947). Also Ref. 6793. Also Refs. 188, 27547, 28609.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/us.html
National Fisheries Authority: http://www.nmfs.gov
Occurrences: Occurrences Point map
Main Ref: Page, L.M. and B.M. Burr, 2011
National Database:

Common names from other countries

Classificação / Names Nomes comuns | Sinônimos | Catalog of Fishes(Gênero, Espécies) | ITIS | CoL | WoRMS | Cloffa

> 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);  sapidissima: sapidissima meaning most delicious (Ref. 1998).

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

marinhas; Água doce; estuarina; anádromo (Ref. 51243); intervalo de profundidade 0 - 250 m (Ref. 6793).   Subtropical; 54°N - 28°N, 84°W - 52°W (Ref. 86798)

Distribuição Países | Áreas da FAO | Ecossistemas | Ocorrências | Point map | Introduções | Faunafri

North America: Atlantic coast from Labrador, Canada to St. Johns River, Florida, USA; ascends coastal rivers during spring spawning migrations. Introduced into Sacramento River, California in 1870s and has spread along Pacific Coast from Kamchatka, Russia to Todos Santos Bay, Mexico. Landlocked in Millerton Lake, California, USA.

Comprimento de primeira maturação / Tamanho / Peso / Idade

Maturity: Lm 43.4, range 38 - 48.5 cm
Max length : 76.0 cm TL macho/indeterminado; (Ref. 6885); 61.7 cm SL (female); common length : 50.0 cm SL macho/indeterminado; (Ref. 188); peso máx. publicado: 5.5 kg (Ref. 7251); idade máx. registrada: 13 anos (Ref. 72462)

Descrição suscinta Chaves de identificação | Morfologia | Morfometria

Espinhos dorsais (total) : 0; Raios dorsais (total) : 15 - 19; Espinhos anais: 0; Raios anais : 18 - 24; Vértebras: 51 - 60. Moderately compressed, belly with a distinct keel. Lower jaw not rising steeply within mouth. Gill rakers long and slender (fewer in young). Silvery in color with blue or blue-green metallic luster on back (Ref. 1998). A dark spot on shoulder, sometimes followed by several more, or even a second row. Resembles A. pseudoharengus with lower jaw rising steeply within mouth, eyes larger, and fewer lower gill rakers, as also A. aestivalis and A. mediocris (Ref. 188). Silvery, with a green or bluish back (Ref. 7251). Branchiostegal rays 7 (Ref. 4639).

Biologia     Glossário (p.ex. epibenthic)

Spends most of its life at sea, returning to freshwater streams to breed (Ref. 27547). Inhabits open water of large rivers (Ref. 86798). Non-spawning adults are found in schools near the surface of continental shelf waters in spring, summer and fall (Ref. 7135); also found in brackish waters (Ref. 4607). Newly hatched larvae are found in rivers during the summer; by autumn they enter the sea and remain there until maturity. Juveniles form schools at 20-30 mm TL and gradually move downstream (Ref. 4639). Feeds on plankton, mainly copepods and mysids, occasionally on small fishes. Feeding ceases during upstream spawning migration and resumes during the downstream post-spawning migration (Ref. 1998). Commercially caught in rivers and estuaries during spawning migration (Ref. 1998). Utilized fresh, salted, or smoked. The roe is esteemed. Eaten pan-fried, broiled, and baked (Ref. 9988). Possibly to 375 m depth (Ref. 6793). Parasites found are nematodes, Acanthocephala, copepods and distomes (Ref. 37032).

Ciclo de vida ou comportamento de acasalamento Maturities | Reprodução | Spawnings | Egg(s) | Fecundities | Larvas

Some shad spawn immediately on entering fresh water while others may undertake fairly long journeys, as much as 630 km upstream, to their favored spawning grounds (Ref. 4607). Enters rivers as early as November (Florida) and as late as May or June in the north, depending on water temperature (peak runs at about 18.5 °C). Spawning occurs at sundown and continues until after midnight. The fish pair and swim close together, releasing eggs and milt (Ref. 27547). Adults descend shortly after spawning, the young in the autumn. Spawning reported from 8-26°C, generally occurs at 12-21°C (Ref. 38954).

Referência principal Upload your references | Referências | Coordenador | Colaboradores

Whitehead, P.J.P., 1985. FAO Species Catalogue. Vol. 7. Clupeoid fishes of the world (suborder Clupeoidei). An annotated and illustrated catalogue of the herrings, sardines, pilchards, sprats, shads, anchovies and wolf-herrings. FAO Fish. Synop. 125(7/1):1-303. Rome: FAO. (Ref. 188)

Status na Lista Vermelha da UICN (Ref. 130435)

  Segura ou pouco preocupante (LC) ; Date assessed: 22 August 2018

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Ameaça para os humanos

  Harmless




Uso pelos humanos

Pescarias: espécies comerciais; peixe esportivo: sim
FAO(pescarias: produção; publication : search) | FishSource | Sea Around Us

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Trophic ecology
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Ecology
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Estimates based on models

Preferred temperature (Ref. 115969): 0.5 - 11.5, mean 5.6 (based on 113 cells).
Índice de diversidade filogenética (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00646 (0.00356 - 0.01171), b=3.00 (2.85 - 3.15), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Nível Trófico (Ref. 69278):  3.5   ±0.3 se; based on diet studies.
Resiliência (Ref. 120179):  Baixo, tempo mínimo de duplicação da população 4,5 - 14 anos (K=0.14; tm=4.7).
Fishing Vulnerability (Ref. 59153):  Moderate to high vulnerability (50 of 100).
Climate Vulnerability (Ref. 125649):  Moderate vulnerability (44 of 100).
Categoria de preço (Ref. 80766):   Low.