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💧 Freshwater Vulnerable 🌡️ Tropical

Betta Dennisyongi

Betta dennisyongi Tan, 2013
Max Length
3.5 cm
Max Weight
-
Lifespan
-
Trophic Level
3.1
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Facultative air-breathing ; Occurs in lowland hillstream and acid water swamp habitats. Found in clear to brown-water habitats, from secondary forest to plantation and farmland environments. Syntopic with Osteochilus jeruk, Rasbora jacobsoni, Rasbora kluetensis (Cyprinidae); Nemacheilus tuberigum (Nemacheilidae); Mystus punctifer (Bagridae); and Ompok brevirictus, Kryptopterus piperatus (Siluridae) .

Scientific Name
Betta dennisyongi
Authority
Tan, 2013
Habitat
Freshwater
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
VU
Max Length
3.5 cm
Trophic Level
3.1
Resilience
High
Vulnerability
10.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal spines (total): 1; Dorsal soft rays (total): 8; Anal spines: 2 - 3; Anal soft rays: 22 - 24; Vertebrae: 29 - 30. Differs from Betta rubra bypossessing the following characters: a continuous black postorbital stripe extending up to opercle edge (vs. interrupted stripe); broad suborbital stripe below eye forming a triangular black mark (4-5 scale rows wide, vs. 2-3); body coloration less intense with wider interspaces between the black body bars; fewer anal-fin n rays (mode 25, vs. 27); greater number of subdorsal scales (6-7 vs. 5-5 ½); greater number of lateral scales (mode 31, vs. 30); greater number of vertebrae (mode 30, vs. 29); longer dorsal-fin base length (13.0-18.4, vs. 11.0-13.4% SL); and smaller maximum size (35.4 vs. 42.1 mm SL) .: fusiform / normal.

🌀 Behaviour

Behavioural data for Betta Dennisyongi is currently being reviewed.

🦐 Diet

Diet information for Betta Dennisyongi is currently being compiled.

🥚 Reproduction

Reproduction data for Betta Dennisyongi is currently being compiled.

🌍 Habitat & Distribution

Freshwater; benthopelagic. Tropical

🌿 Ecology

Zone Preferences
💧 Freshwater
Trophic Level
3.1±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00977 × L2.97 (TL)
Max TL
3.5cm
Dorsal Spines
1
Dorsal Rays
8
Anal Spines
3
Anal Rays
23
Vertebrae
30

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Vulnerable
Assessment Date
2018

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.1
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Described By
Tan, 2013

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