Lake sturgeon
📖 Overview
Adults inhabit bottom of lakes and large rivers , usually in 5-9 m depth, over mud, sand, and gravel. Occasionally enters brackish water. A specimen caught in 1952 was reputed to have been 152 years old . Search for food, with the aid of the sensory ability of the barbels, by constantly moving close to the substrate. Omnivorous, virtually anything edible that enters the mouth is sucked up and consumed. The food is worked or pulled in the mouth, often partly ejected and sucked in again . Spawning sites are rocky and boulder filled areas along the outside bend of rivers . In the 1800s, it was extensively exploited for oil to fire boilers on steamboats, animal feed and fertilizer. Later is was high-valued as smoked, caviar and isinglass . In 1951, Canada, 2,000 lbs. of caviar were made from the eggs . It continous to be an important source of food for Indigenous people in North America . Threatened due to over harvesting, habitat loss and pollution .
🔬 Taxonomy
🐟 Physical Description
Single row of preanal shields. Soft area on the top of the head absent and black viscera. Large blotches present on anterior half of upper surface of snout and on back. Lower surface whitish . Anal fin origin behind dorsal fin origin; scutes on back and along side same color as skin .: elongated.
🌀 Behaviour
Behavioural data for Lake sturgeon is currently being reviewed.
🦐 Diet
🥚 Reproduction
Spawning sites are rocky and boulder filled areas along the outside bend of rivers .
🌍 Habitat & Distribution
Freshwater; brackish; demersal; potamodromous ; depth range 5 - 9 m . Temperate; 60°N - 30°N, 100°W - 71°W North America: St.
🌿 Ecology
📐 Morphometrics
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
🎣 Angling Guide
- medium-heavy 7ft spinning rod
- 30-50 lb braid
- fluorocarbon leader
- grass flats
- oyster bars
- marsh drains
- deeper channel edges
Use barbless hooks, minimise air exposure, and revive fish head-first in current before release.
⚠️ Slot limits protect breeding-size fish. Verify daily bag limits.
🍽️ Edibility & Flavour
"Lake sturgeon 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
Detailed nutritional data for Lake sturgeon is currently being compiled from USDA FoodData Central.
🔬 Mercury Safety
Mercury data for Lake sturgeon has not yet been assigned. Please consult FDA/EPA guidance for general seafood safety advice.
🌿 Sustainability
🔬 Full Nutritional Profile
Per 100g - Raw, per 100g - Source: USDA FoodData Central templates (generic fish average)
📊 Population Dynamics
| Year | Region | Index | Notes |
|---|---|---|---|
| - | - | - |
🌐 Names & Taxonomy
Scientific Synonyms
| Scientific Name | Author | Year | Status |
|---|---|---|---|
| Accipenser fulvescens | Rafinesque | 1817 | Synonym |
| Acipenser rubicundus | Lesueur | 1818 | Synonym |
🔍 Similar Species
🗺️ Global Occurrence Map
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 6 records indexed .
👥 Community & Contribute
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