Gautama thryssa (Thryssa gautamiensis) fish species and information / pictures of Gautama thryssa - Thryssa gautamiensis

Gautama thryssa (Thryssa gautamiensis) fish species information

Scientific Name
Thryssa gautamiensis

Common Name
Gautama thryssa

Biology
Dorsal spines (total): 0; Anal spines: 0; Anal soft rays: 34 - 37. Belly with 25 to 27 (rarely 24) keeled scutes from isthmus to anus. Tip of snout at about level of upper rim of eye. Maxilla moderate, projecting slightly beyond edge of gill cover; first supra-maxilla minute, oval; jaw teeth slightly enlarged compared with other species. A dark blotch behind upper part of gill opening; a pair of dark lines on back, from nape to caudal fin.

Classification

Classified By

Babu Rao, 1971

Class

Ray-finned fishes (Actinopterygii)

Order

Herrings (Clupeiformes)

Family

Anchovies (Engraulidae)

Distribution

Region

Indian Ocean

Distribution

Indian Ocean: eastern coasts of India, possibly also Myanmar.

Range

25°N - 4°N, 76°E - 95°E

Environment

Climate

Tropical

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

0 m

Depth To - meters

50 m

Zone

pelagic-neritic

Environment

Marine; brackish; pelagic-neritic; amphidromous (Ref. 51243); depth range 0 - 50 m (Ref. 189)

Trophic Level

3.34 s.e. 0.47 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

True

Occurs in Brackish water

True

Occurs in Fresh Water

False

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

21.5 cm

Common Length

Unknown 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: subsistence fisheries

Vulnerability

Low to moderate vulnerability (25 of 100)

Resilience

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

Threat To Humans

Harmless

IUCN Red List Status

Data deficient (DD)