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💧 Freshwater Least Concern 🌡️ Tropical

Hoedeman's Hypopygus

Hypopygus hoedemani de Santana & Crampton, 2011
Max Length
5.9 cm
Max Weight
-
Lifespan
-
Trophic Level
3.1
Depth
-
Climate
Tropical
Resilience
-
Vulnerability
10.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Hoedeman's Hypopygus (Hypopygus hoedemani), first described by de Santana & Crampton, 2011 is a small fish in the family Rhamphichthyidae (order Gymnotiformes). Adults typically reach 5.90 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus. On the IUCN Red List, it is classified as Least Concern.

Scientific Name
Hypopygus hoedemani
Authority
de Santana & Crampton, 2011
Habitat
Freshwater
Climate
Tropical
IUCN Status
LC
Max Length
5.9 cm
Trophic Level
3.1
Vulnerability
10.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Hypopygus hoedemani is diagnosed from congeners by the following combination of characters: the absence of the sixth infraorbital bone (versus presence in all congeners except H. lepturus and H. minissimus), the total number of anal-fin rays (102–118 versus 136–174 in all congeners, except for H. lepturus and H. minissimus), the length of the caudal filament (31.1–48.1% of LEA versus 48.4–80.9 in H. lepturus), the presence of oblique bands (versus absence in H. minissimus), the presence of scales at midbody (versus absence in H. minissimus), and the dorsal rami of intermittent branch of anterior lateral line nerve visible as two black parallel lines (versus not visible in H. ortegai) .

🌀 Behaviour

Behavioural data for Hoedeman's Hypopygus is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Freshwater; benthopelagic. Tropical South America: Hypopygus hoedemani is known from small terra firme streams and rivers in the Rio Negro and Rio Preto da Eva drainages of the Amazon basin, Brazil (Ref.

🌿 Ecology

Zone Preferences
💧 Freshwater
Trophic Level
3.1±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00269 × L3.07 (TL)
Max TL
5.9cm

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2018

📊 Population Risk & Fisheries

Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.1
Predator
Climate Zone
Tropical
Described By
de Santana & Crampton, 2011

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