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💧 Freshwater Least Concern 🌡️ Subtropical

Hardhead

Mylopharodon conocephalus Baird & Girard, 1854
Max Length
100 cm
Max Weight
-
Lifespan
-
Trophic Level
2
Depth
-
Climate
Subtropical
Resilience
Very low
Vulnerability
69.00/100
Typical Length
35 cm
Depth Zone
demersal

📖 Overview

Hardhead (Mylopharodon conocephalus), first described by Baird & Girard, 1854 is a very large fish in the family Cyprinidae (order Cypriniformes). Adults typically reach 100.00 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Subtropical waters. It feeds primarily on plankton, plant material, and detritus. On the IUCN Red List, it is classified as Least Concern.

Scientific Name
Mylopharodon conocephalus
Authority
Baird & Girard, 1854
Habitat
Freshwater
Climate
Subtropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
100 cm
Trophic Level
2
Resilience
Very low
Vulnerability
69.00/100
Migration
Potamodromous
Salinity
0–0.5 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal soft rays (total): 8. Body long, slender; brown to dusky bronze above (darkest on large individuals; silver side; dorsal-fin origin behind pelvic-fin origin; 69-81 scales on lateral line; 8 dorsal rays; premaxillary frenum present; snout long, pointed; large, terminal mouth reaching front of eye; pharyngeal teeth 2,5-4,2 .: fusiform / normal.

🌀 Behaviour

Behavioural data for Hardhead is currently being reviewed.

🦐 Diet

algae
aquatic plants
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Freshwater; demersal; potamodromous . Subtropical; 42°N - 36°N North America: Sacramento-San Joaquin and Russian River drainages in California, USA.

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Migration
Potamodromous
Trophic Level
2±0.2

📐 Morphometrics

Length–Weight Relationship: W = 0.01148 × L3.03 (TL)
Max TL
100cm
Dorsal Rays
8

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2012

📊 Population Risk & Fisheries

Population Resilience
Very low
Minimum doubling time
Fishing Vulnerability
69.00/100
High vulnerability
Trophic Level
2
Omnivore / Planktivore
Body Shape
Fusiform / normal
Climate Zone
Subtropical
Described By
Baird & Girard, 1854

🌐 Names & Taxonomy

Scientific Synonyms

Scientific Name Author Year Status
Gila conocephala Baird & Girard 1854 Synonym
Mylopharodon robustus Ayres 1855 Synonym

🦠 Common Diseases

The following diseases are known to affect Hardhead.

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 7 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

Aquareap Community Observations
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