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💧 Freshwater Endangered 🌡️ Subtropical

Rio Grande silvery minnow

Hybognathus amarus Girard, 1856
Max Length
10 cm
Max Weight
-
Lifespan
-
Trophic Level
-
Depth
-
Climate
Subtropical
Resilience
High
Vulnerability
24.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Adults inhabit pools and backwaters of low-gradient creeks and small to large rivers . Oviparous, open substratum spawners .

Scientific Name
Hybognathus amarus
Authority
Girard, 1856
Habitat
Freshwater
Climate
Subtropical
IUCN Status
EN
Max Length
10 cm
Resilience
High
Vulnerability
24.00/100
Migration
Potamodromous
Salinity
0–0.5 ppt

🐟 Physical Description

Physical description for Rio Grande silvery minnow is currently being compiled.

🌀 Behaviour

Behavioural data for Rio Grande silvery minnow is currently being reviewed.

🦐 Diet

Diet information for Rio Grande silvery minnow is currently being compiled.

🥚 Reproduction

Spawn Location
Pelagic

The pelagic-broadcast spawning behavior consisted of males pursuing a single female and nudging her abdominal region. When the female was ready to spawn, a single male wrapped around the female at which time eggs and milt were simultaneously expelled. Reproduction usually consisted of several individual spawning episodes with at least 10-min intervals between events .

🌍 Habitat & Distribution

Freshwater; demersal; potamodromous . Subtropical North America: Rio Grande drainage (including Pecos River) in Texas and New Mexico, USA.

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Migration
Potamodromous

📐 Morphometrics

Length–Weight Relationship: W = 0.00525 × L3.1 (TL)
Max TL
10cm

🌡️ 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
24.00/100
Low vulnerability
Climate Zone
Subtropical
Described By
Girard, 1856

👥 Community & Contribute

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