Johnston's topminnow (Aplocheilichthys johnstoni) fish species and information / pictures of Johnston's topminnow - Aplocheilichthys johnstoni

Johnston's topminnow (Aplocheilichthys johnstoni) fish species information

Scientific Name
Aplocheilichthys johnstoni

Common Name
Johnston's topminnow

Biology
Found near the surface and among weeds in which it seeks refuge and food (Ref. 5595). Prefers standing or gently flowing water as in river backwaters, floodplains (Ref. 7248), swamps (Ref. 7248, 47311), creeks and pools (Ref. 47311). Usually found in small schools among fringing vegetation; usually abundant when present (Ref. 47311). Feeds on small invertebrates like mosquito larvae and daphnia. A serial spawner, lays eggs which attach to vegetation. When food is abundant, breeding occurs daily over an extended period (year-round where conditions are suitable) (Ref. 7248). 6 cm max TL (Ref. 3788). Not a seasonal killifish. Is difficult to maintain in aquarium (Ref. 27139).

Classification

Classified By

G?nther, 1894

Class

Ray-finned fishes (Actinopterygii)

Order

Live bearers, Killifishes and Rivulines (Cyprinodontiformes)

Family

Poeciliids (Poeciliidae)

Distribution

Region

Africa

Distribution

Africa: widely distributed in southern Africa; present in various lakes and river drainages in Malawi, Tanzania, Mozambique, Zambia, Angola, Namibia, Botswana, Zimbabwe, South Africa and the Democratic Republic of the Congo (Ref. 47311).

Range

10°S - 28°S

Environment

Climate

Tropical

Water Temperature From

18 °C

Water Temperature To

26 °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

benthopelagic

Environment

Freshwater; ; pH range: 6.5 - 7.2 benthopelagic; non-migratory

Trophic Level

3.2 s.e. 0.40 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

True

Physical Size and Genetics

Maximum Length

8.5 cm

Common Length

4.5 cm

Phylogenetic Diversity Index

PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: minor commercial; aquarium: commercial

Vulnerability

Low vulnerability (24 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)