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🌊 Marine 🌡️ Tropical

Socotra blue-spotted guitarfish

Acroteriobatus stehmanni Weigmann, Ebert & Séret, 2021
Max Length
62.2 cm
Max Weight
-
Lifespan
-
Trophic Level
3.5
Depth
36–43 m
Climate
Tropical
Resilience
Low
Vulnerability
35.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Occurs in coastal waters. Size range from 20.8 - 62.2 cm TL, males at size 37.8 cm TL is considered very early subadult (apparently start to mature around this size) and juvenile at 20.8 cm TL; while females at 59.4 and 60.2 cm TL are presumed to be adult .

Scientific Name
Acroteriobatus stehmanni
Authority
Weigmann, Ebert & Séret, 2021
Habitat
Marine
Climate
Tropical
Max Length
62.2 cm
Depth Range
36–43 m
Trophic Level
3.5
Resilience
Low
Vulnerability
35.00/100
Salinity
30–40 ppt

🐟 Physical Description

This species is distinguished by the following set of characters: dorsal surface is smooth, no prominent thorns or tubercles, except for the slightly enlarged granular denticles partially around orbital rims and rather regularly distributed along midline from nape to or to somewhat anterior to first dorsal-fin origin, none between dorsal fins and upper caudal fin; the snout semi-translucent with a few, somewhat elongated bluish-gray spots only, giving it a very reduced stripe-nosed appearance, patterning with small bluish-gray circular spots generally few and confined to symmetrical patterns on snout tip, the posterior pectoral-fin margins, a pair of tiny spots on midbody behind occipital joint, and few spots on posterior pelvic-fin margins; brown spots indistinct on body and dorsal and caudal fins; ventral surface is white except for a blackish blotch and two tiny black spots on ventral snout tip in smallest juvenile paratype; nasal lamellae 43-48; upper jaw tooth row count ca. 64-78; post-synarcual centra 181-186; total vertebral segments 194-200; total pectoral skeleton radials 63-67 .Cross section: flattened.

🌀 Behaviour

Behavioural data for Socotra blue-spotted guitarfish is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring-summer
Spawn Location
Pelagic
Fertilization
External

🌍 Habitat & Distribution

Marine; demersal; depth range 36 - 43 m . Tropical Indian Ocean: off Socotra Is.

🌿 Ecology

Zone Preferences
🌊 Marine ⬇️ Benthic
Trophic Level
3.5±0.5

📐 Morphometrics

Length–Weight Relationship: W = 0.00302 × L3.13 (TL)
Max TL
62.2cm

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
35.00/100
Low vulnerability
Trophic Level
3.5
Predator
Climate Zone
Tropical
Described By
Weigmann, Ebert & Séret, 2021

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