Brook stickleback
📖 Overview
Adults inhabit cool, vegetated, sand or mud bottoms of lakes and ponds. Also in pools and backwaters of creeks and small rivers . Rarely found in brackish water. They feed on crustacean and insect larvae, eggs and larvae of fishes, snails, oligochaetes and algae . Preyed upon by kingfishers, herons, and mergansers and occasionally by fishes like Salvelinus fontinalis and Esox lucius . Males build, guard and aerate the nest where the eggs are deposited .
🔬 Taxonomy
🐟 Physical Description
Diagnosed from other species of Gasterosteidae in Europe by combination of the following characters: 4-6 short dorsal spines, never inclined to the left or to the right; without keel on side of caudal peduncle; anal fin origin slightly behind dorsal fin origin; body dark olive green (getting blackish in breeding males), with numerous pale spots or undulating bars on flank .: fusiform / normal.
🌀 Behaviour
Behavioural data for Brook stickleback is currently being reviewed.
🦐 Diet
🥚 Reproduction
Males arrive first in shallow waters, establish their territories, and build small nests near the bottom. The male then entices the female to the nest and by prodding her ventral and caudal peduncle area, forces her to release her eggs into the nest. The male then drives the female away, fertilizes the eggs and guards his territory until the young hatch and swim away. Males may build two nests during a breeding season and more than one female may deposit eggs in each nest . Eggs hatch in 8-9 days .
🌍 Habitat & Distribution
Freshwater; demersal; pH range: 7.0 - ? ; dH range: ? - 15; potamodromous ; depth range 0 - 55 m . Temperate; 4°C - 18°C ; 69°N - 34°N North America: Nova Scotia to Northwest Territories and eastern British Columbia in Canada; Great Lakes-Mississippi River basins south to southern Ohio and Nebraska in USA and west to Montana, USA.
🌿 Ecology
crustacean and insect larvae, eggs and larvae of fishes, snails, oligochaetes and algae (Ref
📐 Morphometrics
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
🍽️ Edibility & Flavour
"Brook stickleback 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 Brook stickleback is currently being compiled from USDA FoodData Central.
🔬 Mercury Safety
Mercury data for Brook stickleback 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 |
|---|---|---|---|
| Eucalia inconstans | Kirtland | 1840 | Synonym |
| Eucalia inconstans pygmaea | Agassiz | 1850 | Synonym |
| Eucalia pygmaea | Agassiz | 1850 | Synonym |
| Gasterosteus gymnetes | Dawson | 1859 | Synonym |
| Gasterosteus inconstans | Kirtland | 1840 | Homotypic |
| Gasterosteus pygmaeus | Agassiz | 1850 | Synonym |
🔍 Similar Species
🗺️ Global Occurrence Map
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 73 records indexed .
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