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💧 Freshwater Critically Endangered 🌡️ Tropical

Adamson's grunter

Hephaestus adamsoni Trewavas, 1940
Max Length
40 cm
Max Weight
-
Lifespan
-
Trophic Level
3.3
Depth
-
Climate
Tropical
Resilience
Medium
Vulnerability
46.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Extremely common in lake shores; juveniles occur in the shallows close to shore, whereas adults form large schools over deep water adjacent to rocky cliffs. Main food of the Foi people who live along the shores of Lake Kutubu . Eggs are guarded and fanned by the male parent .

Scientific Name
Hephaestus adamsoni
Authority
Trewavas, 1940
Habitat
Freshwater
Climate
Tropical
IUCN Status
CR
Max Length
40 cm
Trophic Level
3.3
Resilience
Medium
Vulnerability
46.00/100
Migration
Non-migratory
Salinity
0–0.5 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 12; Dorsal soft rays (total): 10 - 12; Anal spines: 3; Anal soft rays: 9 - 10.

🌀 Behaviour

Behavioural data for Adamson's grunter is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

Eggs are guarded and fanned by the male parent .

🌍 Habitat & Distribution

Freshwater; benthopelagic; non-migratory. Tropical; 6°S - 7°S

🌿 Ecology

Zone Preferences
💧 Freshwater
Migration
Non-migratory
Trophic Level
3.3±0.5
🐠 Schooling

📐 Morphometrics

Length–Weight Relationship: W = 0.01698 × L2.99 (TL)
Max TL
40cm
Dorsal Spines
12
Dorsal Rays
11
Anal Spines
3
Anal Rays
10

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Critically Endangered
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
46.00/100
Moderate-High vulnerability
Trophic Level
3.3
Predator
Climate Zone
Tropical
Described By
Trewavas, 1940

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Adamson's Grunter
🌍CES bručoun Adamsonův

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 1 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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