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Diadromous Least Concern 🌡️ Temperate

Longtail dwarf goby

Knipowitschia longecaudata Kessler, 1877
Max Length
5 cm
Max Weight
-
Lifespan
-
Trophic Level
3.4
Depth
-
Climate
Temperate
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Occur in shallow water, on sand and among weeds . Live less than 2 years. Feed on small benthic invertebrates . Spawn after first winter. Females may spawn several times during a season. Males defend eggs in cavities under stones, plant material or molluscs shells like underside of lamellibranch valves (Cardium, Monodonta, Unio, etc.) . Eggs hatch at 3.0-3.8 mm .

Scientific Name
Knipowitschia longecaudata
Authority
Kessler, 1877
Habitat
Diadromous
Climate
Temperate
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
5 cm
Trophic Level
3.4
Resilience
High
Vulnerability
10.00/100
Water Temp
4–20 °C
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 6 - 8; Dorsal soft rays (total): 7 - 9; Anal spines: 1; Anal soft rays: 8 - 9. This species is distinguished from its congeners by the following characters: upper part of caudal fin longer than the lower part; anterior extremity of anterior oculoscapular canal in front of middle of eye; no posterior oculoscapular canal; back unscaled in front of origin of second dorsal; breeding males with 4-8 dark bars when alive; total scales in midlateral series 33-40 .: fusiform / normal.

🌀 Behaviour

Behavioural data for Longtail dwarf goby is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

Size at Maturity
2cm TL

Males defend eggs in cavities under stones, plant material or molluscs shells . Females spawn several times during a season .

🌍 Habitat & Distribution

Marine; freshwater; brackish; demersal. Temperate; 4°C - 20°C ; 48°N - 42°N, 30°E - 54°E

🌿 Ecology

Zone Preferences
🌊 Marine 💧 Freshwater 🌿 Brackish ⬇️ Benthic
Trophic Level
3.4±0.4
Food Items

small benthic invertebrates (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.01 × L3 (TL)
Max TL
5cm
Dorsal Spines
7
Dorsal Rays
8
Anal Spines
1
Anal Rays
9

🌡️ Water Parameters & Tolerance

Temperature Range
4–20°C
Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2022

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.4
Predator
Body Shape
Fusiform / normal
Climate Zone
Temperate
Described By
Kessler, 1877

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