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💧 Freshwater Vulnerable 🌡️ Tropical

Large-toothed Lake Turkana robber

Brachyalestes ferox Hopson & Hopson, 1982
Max Length
8.1 cm
Max Weight
-
Lifespan
-
Trophic Level
3.2
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
pelagic

📖 Overview

Pelagic, restricted to offshore waters; feeds chiefly on prawns, zooplankton and insects with an increasing proportion of small fish in larger individuals; spawns within lake; dominant species in terms of standing stock in Lake Turkana .

Scientific Name
Brachyalestes ferox
Authority
Hopson & Hopson, 1982
Habitat
Freshwater
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
VU
Max Length
8.1 cm
Trophic Level
3.2
Resilience
High
Vulnerability
10.00/100
Salinity
0–0.5 ppt

🔬 Taxonomy

Genus
Brachyalestes
Brachyalestes
Species
Large-toothed Lake Turkana robber
Brachyalestes ferox

🐟 Physical Description

It has sharply pointed fang-like teeth and a muzzle-like prognathous snout . Pale fawn with silvery scales, darker on the dorsal surface . Both lobes of the caudal fin marked with red chromatophores on the lower lobe . The dorsal surface is lightly patterned with melanophores in preserved specimens, heavier in a band on the middorsal line . Characteristic patches of black pigment are present on the snout, on the lower jaw and on the mid-lateral portion of the caudal peduncle . Distal margin of caudal fin with broad edging of black pigment .: fusiform / normal.

🌀 Behaviour

Behavioural data for Large-toothed Lake Turkana robber is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Freshwater; pelagic. Tropical endemic to Lake Turkana, Kenya (Ref.

🌿 Ecology

Zone Preferences
💧 Freshwater 🐟 Pelagic
Trophic Level
3.2±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.01072 × L3.02 (TL)
Max TL
8.1cm

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Vulnerable
Assessment Date
2022

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.2
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Described By
Hopson & Hopson, 1982

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