Scientific Name
Metynnis longipinnis

Common Name
Silverdollar

Biology
The species is closely related to Metynnis hypsauchen (M?ller & Troschel, 1844) according to 1. high number of gill-rakers, 2. long adipose fin, 3. deep body, 4. short head and 5. long occipitale and is clearly defined because of 1. the high number of serrae (36-37 vs. 27-32 of M. hypsauchen), 2. the small scales (91-93 vs. about 75-83), 3. uniformly silver colouration and 4. the extremely elongated dorsal fin and anal fin (Ref. 79633).

Classification

Classified By

Zarske & G?ry, 2008

Class

Ray-finned fishes (Actinopterygii)

Order

Characins (Characiformes)

Family

Characins (Characidae)

Distribution

Region

South America

Distribution

South America: Venezuela. Mouth of rio Casiquiare, rio Negro.

Range

Unknown

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

2.93 s.e. 0.35 Based on size and trophs of closest relatives

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

6.7 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5001 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

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

Not Evaluated