Alosa aestivalis, Blueback shad : fisheries

Alosa aestivalis (Mitchill, 1814)

Blueback shad
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Alosa aestivalis   AquaMaps   Data sources: GBIF OBIS
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Image of Alosa aestivalis (Blueback shad)
Alosa aestivalis
Bild av Flescher, D.

Klassificering / Namn Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | 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).
More on author: Mitchill.

Miljö: miljö / Klimatzon / djupintervall / distributionsområde Ekologi

marina; sötvatten; brackvatten pelagic-neritic; anadrom (Ref. 138280); djupintervall 5 - 55 m (Ref. 5951). Subtropical; 47°N - 27°N, 84°W - 60°W (Ref. 117456)

Utbredning Territorier | FAO områden | Ekosystem | Förekomster | Prickkarta | Utplanteringar | Faunafri

Western Atlantic: Cape Breton, Nova Scotia south to the St. John's River, Florida; also in lower parts of rivers (Ref. 188). Introduced in reservoirs in several states, and in the upper Tennessee River system in Tennessee, USA (Ref. 117456, 86798).

Storlek / Vikt / Ålder

Könsmognad: Lm ?  range ? - ? cm
Max length : 40.0 cm SL hane/ej könsbestämd; (Ref. 7251); common length : 27.5 cm SL hane/ej könsbestämd; (Ref. 188); publicerad maxvikt: 200.00 g (Ref. 7251); rapporterad maxålder: 8 år (Ref. 12193)

Kort beskrivning Bestämningsnycklar | Morfologi | Morfometri

Taggstrålar i ryggfenan (totalt) : 0; Mjukstrålar i ryggfenan (totalt) : 15 - 20; Taggstrålar i analfenan: 0; Mjukstrålar i analfenan: 15 - 21; Ryggkotor: 47 - 53. Moderately compressed, belly with distinct keel of scutes. Upper jaw with a distinct notch; lower jaw rising steeply within mouth; minute teeth present at front of jaws (disappearing with age). Lower gill rakers 41 to 52 (fewer in fishes under 10 cm standard length), slender. Back dark blue, sometimes bluish-grey; a dark spot on shoulder (Ref. 188). Peritoneum black (Ref. 7251). Branchiostegal rays 7 (Ref. 4639).
Body shape (shape guide): fusiform / normal; Cross section: compressed.

Biologi     Ordlista (t.ex. epibenthic)

Adults inhabit rivers, estuaries, coastal waters, lakes and reservoirs (Ref. 117456). They are found in saltwater except during the spawning season and occur up to at least 200 km offshore (Ref. 117456). They form schools and possibly wintering near the bottom and out from the coast, approaching the shore in the late spring. They feed on small fishes, copepods and small shrimps. Spawning occurs in brackish- or freshwaters of rivers, arriving in coastal waters a month or so later than A. pseudoharengus (in April at Chesapeake Bay, apparently when the water is above 7.0° C and later further north). Eggs are essentially pelagic, demersal in still water (Ref. 4639). Larvae are found in fresh and brackish rivers (Ref. 4639). Juveniles leave fresh and brackish nursery grounds at about 5 cm, migrating downstream (Ref. 4639). In freshwater habitat, this species usually occurs in current over rocky bottom (Ref. 86798). Marketed mostly fresh and salted (Ref. 188). Parasites found are acanthocephalan and nematodes (Ref. 37032).

Livscykel och parningsbeteende Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver

Upriver movement to spawning areas occur in late afternoon or at night (Ref. 4639).

Huvudreferens Ladda upp dina referenser | referenser | Koordinator | Medarbetare

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 på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))

  Sårbar (VU) (A2b); Date assessed: 13 October 2011

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Hot mot människor

  Harmless





Mänskliga användningsområden

Fiskeri: kommersiell
FAO - fiskeri: landings search; Publication: search | FishSource | Havet omkring oss

Ytterligare information

Trofisk ekologi
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Massakonvertering
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Reproduktion
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Lek
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Ägg
Utveckling av ägg
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Frimärken, mynt, diverse.
Uppsökande verksamhet
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Taxonomi
Populärnamn
synonymer
Morfologi
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Bilder
referenser
referenser

Verktyg

E-bok | Fälthandbok | Bestämningsnycklar | Längdfördelnings-verktyg | Livshistorie-verktyg | Prickkarta | Fångst-MSY |

Särskilda rapporter

Kontrollera för underhåll av akvarium | Kontrollera om det finns faktablad om arter | Kontrollera om det finns faktablad om vattenbruk

Ladda ner XML

Sammanfattande sida | Punktdata | Populärnamn | foton

Internet-källor

AFORO (otoliths) | Alien/Invasive Species database | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Släkte, Arter | DiscoverLife | ECOTOX | FAO - fiskeri: landings search; Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OceanAdapt | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, sök | World Records Freshwater Fishing | Zoologiskt register

Uppskattningar baserade på modeller

Index för fylogenetisk mångfald
(Ref. 82804) 		PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00708 (0.00414 - 0.01211), b=3.11 (2.96 - 3.26), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trofisk nivå
(Ref. 69278) 		3.8   ±0.3 se; based on diet studies.
Resiliens
(Ref. 120179) 		Mellan, lägsta populationsfördubblingstid 1,4-4,4 år (K=0.18; tm=4; Fec=45,800).
Sårbarhet i fisket
(Ref. 59153) 		Moderate to high vulnerability (51 of 100). 🛈
Sårbarhet för klimatet
(Ref. 125649) 		Moderate to high vulnerability (50 of 100). 🛈
Priskategori
(Ref. 80766) 		Low.
Näringsämnen
(Ref. 124155) 		Calcium = 28.1 [13.7, 137.6] mg/100g; Iron = 1.47 [0.63, 3.85] mg/100g; Protein = 19.8 [17.4, 22.6] %; Omega3 = 0.744 [0.386, 1.503] g/100g; Selenium = 18 [9, 36] μg/100g; VitaminA = 18.7 [4.7, 78.7] μg/100g; Zinc = 0.505 [0.325, 0.920] mg/100g (wet weight);