Blueback shad
📖 Overview
Adults inhabit rivers, estuaries, coastal waters, lakes and reservoirs . They are found in saltwater except during the spawning season and occur up to at least 200 km offshore . 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 . Larvae are found in fresh and brackish rivers . Juveniles leave fresh and brackish nursery grounds at about 5 cm, migrating downstream . In freshwater habitat, this species usually occurs in current over rocky bottom . Marketed mostly fresh and salted . Parasites found are acanthocephalan and nematodes .
🔬 Taxonomy
🐟 Physical Description
Dorsal spines (total): 0; Dorsal soft rays (total): 15 - 20; Anal spines: 0; Anal soft rays: 15 - 21; Vertebrae: 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 . Peritoneum black . Branchiostegal rays 7 .: fusiform / normal; Cross section: compressed.
🌀 Behaviour
Behavioural data for Blueback shad is currently being reviewed.
🦐 Diet
Diet information for Blueback shad is currently being compiled.
🥚 Reproduction
Upriver movement to spawning areas occur in late afternoon or at night .
🌍 Habitat & Distribution
Marine; freshwater; brackish; pelagic-neritic; anadromous ; depth range 5 - 55 m . Subtropical; 47°N - 27°N, 84°W - 60°W south to the St.
🌿 Ecology
small fishes, copepods and small shrimps
📐 Morphometrics
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
🍽️ Edibility & Flavour
"Blueback shad is an edible species."
- Clear, bright eyes — cloudy eyes indicate age
- Firm flesh that springs back when pressed
- Fresh ocean smell, never strong or ammonia-like
- Bright red or pink gills, not grey or brown
- Shiny, moist skin with scales tightly attached
- Cloudy or sunken eyes
- Strong fishy or ammonia odour
- Soft, mushy flesh that doesn't spring back
- Discoloured or dry flesh
⚡ Nutrition
Per 100g cooked — Source: USDA FoodData Central
| Nutrient | Amount |
|---|---|
| Protein | 19.8 g |
| Omega-3 (total) | 744 mg |
🔬 Mercury Safety
Mercury data for Blueback shad has not yet been assigned. Please consult FDA/EPA guidance for general seafood safety advice.
🌿 Sustainability
🌐 Names & Taxonomy
Scientific Synonyms
| Scientific Name | Author | Year | Status |
|---|---|---|---|
| Alosa cyanonoton | Storer | 1848 | Synonym |
| Clupea aestivalis | Mitchill | 1814 | Synonym |
| Clupea fasciata | Lesueur | 1818 | Synonym |
| Pomolobus aestivalis | Mitchill | 1814 | Synonym |
| Pomolobus cyanonoton | Storer | 1848 | Heterotypic |
🔍 Similar Species
🗺️ Global Occurrence Map
Occurrence records from the Global Biodiversity Information Facility (GBIF) — 83 records indexed .
👥 Community & Contribute
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