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Alosa mediocris (Mitchill, 1814)

Hickory shad
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Alosa mediocris
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Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (Straalvinnigen) > 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).  More on author: Mitchill.

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

; marien; zoetwater; brakwater; anadroom (Ref. 51243).   Temperate; 46°N - 25°N, 82°W - 66°W (Ref. 117467)

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

Western Atlantic: along the coast from Maine to the St. John's River, Florida, USA (Ref. 188). Possibly in Campobello Island, New New Brunswick, Canada (Ref. 86798).

Length at first maturity / Size / Gewicht / Leeftijd

Maturity: Lm 32.0  range ? - ? cm
Max length : 60.0 cm SL mannelijk/geslacht niet bekend; (Ref. 188); common length : 34.0 cm SL mannelijk/geslacht niet bekend; (Ref. 188)

Korte beschrijving Morfologie | Morfometrie

Dorsale stekels (totaal): 0; Dorsale zachte stralen (totaal): 15-20; Anale stekels 0; Anale zachte stralen: 19 - 23; Wervels: 53 - 55. Belly with distinct keel of scutes. Lower jaw very prominent, but not rising steeply within mouth; teeth reduced or in upper jaw absent in fishes over 23 cm standard length. A dark spot on shoulder, several obscure dark spots along flank (sometimes missing). Closely resembles A. chrysochloris which has stronger jaw teeth, no shoulder spot and the body depth less than head length (Ref. 188). Silvery, with a dark grayish green back (Ref. 7251).

Biologie     Verklarende woordenlijst (b.v. epibenthic)

In freshwater habitat, this species occurs in open water of large rivers (Ref. 86798). Schools of adults are found in marine waters, along the coast; also estuaries, tidal rivers and tributaries during late spring and early summer (Ref. 4639). Juveniles tend to leave nursery areas during summer (Ref. 4639). Feeds on small fishes, also squid, small crabs and other crustaceans, as well as fish eggs. Spawn in tidal freshwater (Patuxent River, Chesapeake Bay in May) (Ref. 188), and return to the sea shortly after (Ref. 4639). Parasites found are nematodes, cestodes and trematodes (Ref. 37032).

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

Voornaamste referentie Upload your references | Referenties | Coördinator | Medewerkers

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 op de Rode Lijst van het IUCN (Ref. 120744)

  Niet bedreigd (LC) ; Date assessed: 14 October 2011

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Harmless





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Estimates of some properties based on models

Preferred temperature (Ref. 115969): 8.4 - 25.5, mean 14 (based on 238 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Trophic Level (Ref. 69278):  4.1   ±0.58 se; Based on food items.
Weerstandsvermogen (Ref. 69278):  Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (K=0.3).
Kwetsbaarheid (Ref. 59153):  Moderate vulnerability (41 of 100) .
Prijsklasse (Ref. 80766):   Low.