Amazon hatchet herring (Pristigaster cayana) fish species and information / pictures of Amazon hatchet herring - Pristigaster cayana

Amazon hatchet herring (Pristigaster cayana) fish species information

Scientific Name
Pristigaster cayana

Common Name
Amazon hatchet herring

Biology
Dorsal spines (total): 0; Anal spines: 0; Anal soft rays: 45 - 54. Belly profile strongly convex (almost circular from throat to anus), 30 to 33 scutes. Lower jaw projecting, mouth directed almost vertically upward; no toothed hypo-maxillary bone between hind end of pre-maxilla and lower bulge of maxilla blade; eye large. Pectoral fins high on body; anal fin origin behind dorsal fin base; upper caudal fin lobe ending in a filament in larger fishes (Ref. 188).

Classification

Classified By

Cuvier, 1829

Class

Ray-finned fishes (Actinopterygii)

Order

Herrings (Clupeiformes)

Family

Pristigasterids (Pristigasteridae)

Distribution

Region

South America

Distribution

South America: Amazon drainage (from perhaps mouth of Rio Branco at Goia?u, Rio Solim?es, Rio Juru? and as far as the R?o Ucayali in Peru). (There are possibly two species, judging from specimens in the Museu de Zool?gia, Sao Paulo).

Range

1°N - 2°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; brackish; pelagic

Trophic Level

3.41 s.e. 0.51 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

False

Occurs in Brackish water

True

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

14.5 cm

Common Length

8.5 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: of no interest

Vulnerability

Low vulnerability (11 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