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💧 Freshwater Critically Endangered 🌡️ Tropical

Stiphodon Martenstyni

Stiphodon martenstyni Watson, 1998
Max Length
3.5 cm
Max Weight
-
Lifespan
-
Trophic Level
-
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Like other sicydiine gobies, Stiphodon martenstyni is probably amphidromous (McDowell, 1992a, 1992b). While juveniles and adults live exclusively in freshwater, adults reproduce in freshwater, the eggs being cared for by males. Eggs in all sicydiine gobies studied usually hatch in about 24 hours (Erdman, 1961, 1986; Beyer, 1989) at which time the fry passively drift downstream and out to sea where they become part of the plankton layer. The time spent out at sea as planktonic fry is unknown. The returning fry can be likened to surfers: that is, when fry are able to detect the crest of waves to their new home. This follows a similar scenario presented in Erdman (1961) for Sicydium Valenciennes, 1837 from Puerto Rico .

Scientific Name
Stiphodon martenstyni
Authority
Watson, 1998
Habitat
Freshwater
Climate
Tropical
Body Shape
Elongated
IUCN Status
CR
Max Length
3.5 cm
Resilience
High
Vulnerability
10.00/100
Migration
Amphidromous
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 1; Anal soft rays: 10. Nine rays in second dorsal fin (Dorsal fin VI-I, 9). Fifteen pectoral rays. Scales in lateral series 34. Ten cycloid scales in predorsal midline. Forty-five tricuspid teeth in upper jaw. Cutaneous sensory papillae over head elongate. Upper lip crenulated. Ridge of tissue forming a ring around anus .: elongated.

🌀 Behaviour

Behavioural data for Stiphodon Martenstyni is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Freshwater; demersal; amphidromous. Tropical Known only from the southwestern part of the country (Ref.

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Migration
Amphidromous

📐 Morphometrics

Length–Weight Relationship: W = 0.00389 × L3.12 (TL)
Max TL
3.5cm
Dorsal Spines
7
Dorsal Rays
9
Anal Spines
1
Anal Rays
10

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Critically Endangered
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Body Shape
Elongated
Climate Zone
Tropical
Described By
Watson, 1998

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