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💧 Freshwater Endangered 🌡️ Temperate

Humpback chub

Gila cypha Miller, 1946
Max Length
38 cm
Max Weight
Lifespan
Trophic Level
2
Depth
Climate
Temperate
Resilience
Medium
Vulnerability
50.00/100
Typical Length
25 cm
Depth Zone

📖 Overview

Adults inhabit swift, rocky runs and flowing pools. The hump at the back of the head directs fish to maintain position in the swift water .

Scientific Name
Gila cypha
Authority
Miller, 1946
Habitat
Freshwater
Climate
Temperate
Body Shape
Fusiform / normal
IUCN Status
EN
Max Length
38 cm
Trophic Level
2
Resilience
Medium
Vulnerability
50.00/100
Migration
Potamodromous
Salinity
0–0.5 ppt

🐟 Physical Description

Body deep and compressed; caudal peduncle long, extremely slender; fins falcate; caudal fin large, forked; angle along anal fin base continues along upper edge of caudal fin. Large-sized individuals possess large, nearly scaleless hump behind small, depressed head; mouth subterminal, extending to front of small eye; 73-90 scales on lateral line; usually 9 dorsal rays; 10 anal rays; pharyngeal teeth 2,5-4.2. Dark olive-gray above, silver side .: fusiform / normal.

🌀 Behaviour

Behavioural data for Humpback chub is currently being reviewed.

🦐 Diet

Diet information for Humpback chub is currently being compiled.

🥚 Reproduction

Reproduction data for Humpback chub is currently being compiled.

🌍 Habitat & Distribution

Freshwater; benthopelagic; potamodromous . Temperate; 42°N - 36°N North America: upper Colorado River drainage in Wyoming, Colorado, Utah and Arizona, USA.

🌿 Ecology

Zone Preferences
💧 Freshwater
Migration
Potamodromous
Trophic Level
2±0.2

📐 Morphometrics

Length–Weight Relationship: W = 0.01148 × L3.03 (TL)
Max TL
38cm

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Endangered
Assessment Date
2012

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
50.00/100
Moderate-High vulnerability
Trophic Level
2
Omnivore / Planktivore
Body Shape
Fusiform / normal
Climate Zone
Temperate
Described By
Miller, 1946

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