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Diadromous Least Concern 🎣 Game Fish 🌡️ Temperate 🎣 Game Fish

Hickory shad

Alosa mediocris Mitchill, 1814
Max Length
60 cm
Max Weight
-
Lifespan
-
Trophic Level
4.1
Depth
-
Climate
Temperate
Resilience
Medium
Vulnerability
41.00/100
Typical Length
34 cm
Depth Zone
pelagic

📖 Overview

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

Scientific Name
Alosa mediocris
Authority
Mitchill, 1814
Habitat
Diadromous
Climate
Temperate
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
60 cm
Trophic Level
4.1
Resilience
Medium
Vulnerability
41.00/100
Migration
Anadromous
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 0; Dorsal soft rays (total): 15 - 20; Anal spines: 0; Anal soft rays: 19 - 23; Vertebrae: 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 . Silvery, with a dark grayish green back .: fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Hickory shad is currently being reviewed.

🦐 Diet

Diet information for Hickory shad is currently being compiled.

🥚 Reproduction

Size at Maturity
32cm TL

🌍 Habitat & Distribution

Marine; freshwater; brackish; pelagic-neritic; anadromous . Temperate; 46°N - 25°N, 82°W - 66°W

🌿 Ecology

Zone Preferences
🌊 Marine 💧 Freshwater 🌿 Brackish 🐟 Pelagic
Migration
Anadromous
Trophic Level
4.1±0.58
🐠 Schooling
Food Items

small fishes, also squid, small crabs and other crustaceans, as well as fish eggs

📐 Morphometrics

Length–Weight Relationship: W = 0.00692 × L3.09 (TL)
Max TL
60cm
Dorsal Rays
18
Anal Rays
21
Vertebrae
54

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2011

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
41.00/100
Moderate vulnerability
Trophic Level
4.1
Apex / Top predator
Body Shape
Fusiform / normal
Climate Zone
Temperate
Described By
Mitchill, 1814

🌐 Names & Taxonomy

Scientific Synonyms

Scientific Name Author Year Status
Alosa lineata Storer 1848 Synonym
Clupea mattowaca Mitchill 1815 Synonym
Clupea mediocris Mitchill 1814 Synonym
Clupea pusilla Mitchill 1814 Heterotypic
Clupea viridescens DeKay 1842 Synonym
Pomolobus mediocris Mitchill 1814 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 22 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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