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💧 Freshwater Vulnerable 🌡️ Tropical

Allen's Sole

Leptachirus alleni Randall, 2007
Max Length
8.6 cm
Max Weight
-
Lifespan
-
Trophic Level
3.3
Depth
0–1 m
Climate
Tropical
Resilience
High
Vulnerability
19.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Specimens collected from a small turbid creek with a salinity of 10 ppt, about 19 km upstream from Bintuni Bay. The area receives semidiurnal tides averaging about 3.5 m and the mangrove-nipa zone of this creek is thus subjected to large fluctuations in salinity and turbidity .

Scientific Name
Leptachirus alleni
Authority
Randall, 2007
Habitat
Freshwater
Climate
Tropical
Body Shape
Short and / or deep
IUCN Status
VU
Max Length
8.6 cm
Depth Range
0–1 m
Trophic Level
3.3
Resilience
High
Vulnerability
19.00/100
Salinity
0–0.5 ppt

🔬 Taxonomy

Genus
Leptachirus
Leptachirus
Species
Allen's Sole
Leptachirus alleni

🐟 Physical Description

Dorsal soft rays (total): 65 - 73; Anal soft rays: 50 - 53; Vertebrae: 37 - 39. This species is distinguished by the following characters: D 65-73; A 50-53; pelvic rays 4; lateral-line scales 82-93; lateral line on ocular side of head with a ventral branch of 4-6 pores, remaining horizontal anterior part with 5-7 pores; vertebrae 37-39; dorsal pterygiophores anterior to fourth neural spine 8-9; body depth 2.7-3.0 in SL; no caudal peduncle; head length 4.35-4.65 in SL; small eyes, eye diameter 7.2-8.4 in HL; interorbital width 8.1-9.8 in HL; longest dorsal ray 1.75-1.95 in HL; caudal-fin length 4.0-4.25 in SL; pelvic fins and genital papilla not joined, their origins adjacent; short pelvic fins, reaching little beyond base of first anal ray, 2.8-3.2 in HL; alcohol-preserved colour of ocular side grey-brown with scattered dark brown spots smaller than eye (most of about pupil size) and 3 longitudinal rows of larger dark brown blotches; pale dorsal and anal fin rays with membranes dark brown (except anteriorly, where pale); caudal fin with pale rays and brown membranes with darker brown spots or longitudinal streaks; caudal-fin base with dark brown bar or row of dark spots .: short and / or deep.

🌀 Behaviour

Behavioural data for Allen's Sole is currently being reviewed.

🦐 Diet

Diet information for Allen's Sole is currently being compiled.

🥚 Reproduction

Reproduction data for Allen's Sole is currently being compiled.

🌍 Habitat & Distribution

Freshwater; benthopelagic; depth range 0 - 1 m . Tropical

🌿 Ecology

Zone Preferences
💧 Freshwater
Trophic Level
3.3±0.5

📐 Morphometrics

Length–Weight Relationship: W = 0.00955 × L3.07 (TL)
Max TL
8.6cm
Dorsal Rays
69
Anal Rays
52
Vertebrae
38

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Vulnerable
Assessment Date
2020

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
19.00/100
Low vulnerability
Trophic Level
3.3
Predator
Body Shape
Short and / or deep
Climate Zone
Tropical
Described By
Randall, 2007

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