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💧 Freshwater Endangered 🌡️ Subtropical

Manantial roundnose minnow

Dionda argentosa Girard, 1856
Max Length
7.6 cm
Max Weight
-
Lifespan
-
Trophic Level
2.9
Depth
-
Climate
Subtropical
Resilience
High
Vulnerability
25.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Adults inhabit rocky pools, sometimes runs, of headwaters, creeks, and small rivers. Found among filamentous algae . Migratory behaviour is undetermined .

Scientific Name
Dionda argentosa
Authority
Girard, 1856
Habitat
Freshwater
Climate
Subtropical
Body Shape
Elongated
IUCN Status
EN
Max Length
7.6 cm
Trophic Level
2.9
Resilience
High
Vulnerability
25.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Dionda argentosa is genetically distinct but morphologically indistinguishable from Guadalupe roundnose minnow, D. nigrotaeniata .: elongated.

🌀 Behaviour

Behavioural data for Manantial roundnose minnow is currently being reviewed.

🦐 Diet

Diet information for Manantial roundnose minnow is currently being compiled.

🥚 Reproduction

Reproduction data for Manantial roundnose minnow is currently being compiled.

🌍 Habitat & Distribution

Freshwater; benthopelagic. Subtropical North America: Devils River and San Felipe Creek in Texas, USA.

🌿 Ecology

Zone Preferences
💧 Freshwater
Trophic Level
2.9±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00525 × L3.1 (TL)
Max TL
7.6cm

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Endangered
Assessment Date
2018

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
25.00/100
Low vulnerability
Trophic Level
2.9
Omnivore / Planktivore
Body Shape
Elongated
Climate Zone
Subtropical
Described By
Girard, 1856

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