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🌊 Marine Least Concern 🌡️ Subtropical

Southern fiddler ray

Trygonorrhina dumerilii Castelnau, 1873
Max Length
146 cm
Max Weight
-
Lifespan
-
Trophic Level
3.7
Depth
5–205 m
Climate
Subtropical
Resilience
Medium
Vulnerability
65.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

A benthic species that occurs on continental shelf, mainly found on soft bottoms and seagrasses. Feeds on bottom crustaceans, worms, molluscs and small fishes. Produces litters of 2-5 pups. Maturity size of males at ca. 70 cm TL, females at 89 cm TL; birth size at 21-25 cm TL .

Scientific Name
Trygonorrhina dumerilii
Authority
Castelnau, 1873
Habitat
Marine
Climate
Subtropical
Body Shape
Other
IUCN Status
LC
Max Length
146 cm
Depth Range
5–205 m
Trophic Level
3.7
Resilience
Medium
Vulnerability
65.00/100
Salinity
30–40 ppt

🐟 Physical Description

This large shovelnose ray is distinguished by the following characters: suboval disc, short and broadly rounded snout with nostrils partly covered with a large nasal curtain; ridges of small thorns present on mid-line of disc and shoulders; behind interorbital space is an ornate pattern of dark-edged bands without the distinct triangular or diamond-shaped marking .: other; Cross section: flattened.

🌀 Behaviour

Behavioural data for Southern fiddler ray is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

Size at Maturity
94.6cm TL

🌍 Habitat & Distribution

Marine; demersal; depth range 5 - 205 m . Subtropical; 31°S - 41°S, 114°E - 148°E endemic to southern Australia.

🌿 Ecology

Zone Preferences
🌊 Marine ⬇️ Benthic
Trophic Level
3.7±0.6
Food Items

bottom crustaceans, worms, molluscs and small fishes

📐 Morphometrics

Length–Weight Relationship: W = 0.00661 × L2.98 (TL)
Max TL
146cm

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2015

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
65.00/100
High vulnerability
Trophic Level
3.7
Predator
Body Shape
Other
Climate Zone
Subtropical
Described By
Castelnau, 1873

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