Lake Tumba dwarf sprat (Nannothrissa parva) fish species and information / pictures of Lake Tumba dwarf sprat - Nannothrissa parva

Lake Tumba dwarf sprat (Nannothrissa parva) fish species information

Scientific Name
Nannothrissa parva

Common Name
Lake Tumba dwarf sprat

Biology
Dorsal spines (total): 0; Dorsal soft rays (total): 12-18; Anal spines: 0; Anal soft rays: 20 - 22. Body slender. Scutes (19 to 23) beginning at isthmus (or just behind), very strongly keeled (even at only 1.7 cm standard length). Lower jaw projecting, toothless; no teeth on pre-maxillae or maxillae; second supra-maxilla as deep as maxilla blade and with long slender anterior shaft. Pelvic fin insertion about half eye diameter.

Classification

Classified By

Regan, 1917

Class

Ray-finned fishes (Actinopterygii)

Order

Herrings (Clupeiformes)

Family

Herrings, shads and sardines (Clupeidae)

Distribution

Region

Africa

Distribution

Africa: Congo River basin (region of Lake Tumba; Ruki and Oubangui rivers and the Tshuapa River at Ikela).

Range

6°N - 3°S

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

pelagic

Environment

Freshwater; pelagic

Trophic Level

2.66 s.e. 0.21 Based on food items.

Occurs in Marine / Salt water

False

Occurs in Brackish water

False

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

4.2 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.7500 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: subsistence fisheries

Vulnerability

Low vulnerability (10 of 100)

Resilience

High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)

Threat To Humans

Harmless

IUCN Red List Status

Least Concern (LC)