Eugerres axillaris — Details

Black Axillary Mojarra learn more about names for this taxon

Overview

Comprehensive Description

Biology

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Inhabits coastal waters and lagoons, preferring areas with sandy bottoms (Ref. 9303, 37955). Forms schools (Ref. 37955). Feeds on small benthic invertebrates, algae and small fishes (Ref. 9303).
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Description

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Common names: mojarra (English), mojarra (Espanol), palmito (Espanol)
 
Eugerres axillaris (Günther, 1864)


Black-axillary mojarra

Body high, rhomboidal (height ~ 50% of SL), compressed; upper head profile steep, ~ straight; lower profile of head distinctively concave; mouth highly extensible, pointing downward when protruded; 14-16 lower gill rakers; lower border of preopercle serrated; bone under front of eye with serrated border; teeth inside throat all pointed; dorsal fin IX, 9-10, elevated at front,  2nd  spine shorter than head, 21-29.4% of SL; anal fin III, 8, 2nd  anal spine thick, long, a little shorter than 2nd  dorsal spine; pectoral longer than head, reaches past line through anal fin origin, lower border concave; tail forked; scales large, conspicuous and finely rough, covering most of head and body; dorsal and anal fins fold into a high scaly sheath along their bases.

Body silver, darker on back; thin dark lines along scale rows very evident on upper ½ of body; fins dark, spiny dorsal with thin black margin; inside pectoral base dark.



        Size: 25 cm.

Habitat: in shallow coastal areas and lagoons.

Depth: 0-30 m?

        Southern Baja and the southern Gulf of California to Honduras.

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Distribution

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Eastern Central Pacific: Gulf of California to El Salvador.
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Range Description

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This species is endemic to the Eastern Tropical Pacific, and is found from southern Baja California and the southern Gulf of California, Mexico to Honduras.
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Eastern Pacific: Gulf of California to Peru.
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Depth

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Depth Range (m): 0 (G) - 30 (G)
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Zoogeography

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See Map (including site records) of Distribution in the Tropical Eastern Pacific


 
Global Endemism: All species, East Pacific endemic, Tropical Eastern Pacific (TEP) endemic

Regional Endemism: All species, TEP endemic, Continental TEP endemic, 3 provinces (Cortez + Mexican + Panamic) endemic, Continent, Continent only

Residency: Resident

Climate Zone: Northern Subtropical (Cortez Province + Sinaloan Gap), Northern Tropical (Mexican Province to Nicaragua + Revillagigedos), Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)

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Physical Description

Morphology

Size

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Length max (cm): 25.0 (S)
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Size

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Maximum size: 190 mm SL
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Max. size

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19.0 cm SL (male/unsexed; (Ref. 9303))
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Ecology

Habitat

Environment

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demersal; marine
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Habitat and Ecology

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Habitat and Ecology
This demersal species is found in coastal waters, lagoons, and estuaries, preferring areas with sandy substrata (Bussing 1995; De La Cruz Agüero 1997) to depths of 30 m.

Systems
  • Marine
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Depth range based on 18 specimens in 1 taxon.
Water temperature and chemistry ranges based on 2 samples.

Environmental ranges
  Depth range (m): 1 - 4
  Temperature range (°C): 21.311 - 21.311
  Nitrate (umol/L): 0.144 - 0.144
  Salinity (PPS): 34.228 - 34.228
  Oxygen (ml/l): 5.074 - 5.074
  Phosphate (umol/l): 0.352 - 0.352
  Silicate (umol/l): 3.264 - 3.264

Graphical representation

Depth range (m): 1 - 4
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Salinity: Marine, Brackish, Freshwater

Inshore/Offshore: Inshore, Inshore Only

Water Column Position: Bottom, Bottom only

Habitat: Soft bottom (mud, sand,gravel, beach, estuary & mangrove), Soft bottom only, Mud, Sand & gravel, Estuary

FishBase Habitat: Demersal
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Trophic Strategy

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Inhabits coastal waters and lagoons. Feeds on small invertebrates found on the bottom, algae and less frequently on fish.
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Feeding

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Feeding Group: Carnivore

Diet: benthic microalgae, mobile benthic worms, mobile benthic crustacea (shrimps/crabs), mobile benthic gastropods/bivalves, bony fishes
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Life History and Behavior

Reproduction

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Egg Type: Pelagic, Pelagic larva
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Eugerres axillaris

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Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 1
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment

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Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2010

Assessor/s
Espinosa-Perez, H.

Reviewer/s
Collen, B., Richman, N., Beresford, A., Chenery, A. & Ram, M.

Contributor/s
De Silva, R., Milligan, H., Lutz, M., Batchelor, A., Jopling, B., Kemp, K., Lewis, S., Lintott, P., Sears, J., Wilson, P., Smith, J. and Livingston, F.

Justification
This species is widespread in the Eastern Pacific region, and can be found in a variety of coastal habitats within its range. There are no known major threats to this species. It is listed as Least Concern.
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IUCN Red List: Not evaluated / Listed

CITES: Not listed
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Population

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Population
There is no population information available for this species. It is not thought to be very common in La Paz, Mexico.

Population Trend
Unknown
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Threats

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Least Concern (LC)
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Major Threats
There are no known major threats impacting this species.
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Management

Conservation Actions

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Conservation Actions
There are no known conservation measures for this species. However, this species distribution falls into a number of marine protected areas in the Eastern Tropical Pacific region (WDPA 2006).
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