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Eucinostomus entomelas Yáñez-Aranciba, 1980
DARK-SPOT MOJARRA
False-spotfin mojarra

Life   Vertebrata   Fish   Gerreidae   Eucinostomus

Eucinostomus entomelas
© Copyright Ross Robertson, 2006 · 12
Eucinostomus entomelas

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Overview
Main identification features
  • elongate oval
  • dorsal fin grey, black margin
  • black gill chamber
  • pectoral reaches anus
  • a: 2nd spine strongest
Body strongly compressed, in an elongate oval (height 34-41% of standard length), deepening with growth; upper head profile almost straight; border of preopercle smooth; 7-9 (usually 8) rakers on first gill arch; mouth strongly extendible, ends under front edge of eye; dorsal IX,10; anal III,7-9, 2nd spine thinck, shorter than 3rd, shorter than snout; pectoral pointed, reaches beyond line through anus, ~35% of standard length; 43-45 scales on lateral line; lateral line curved on rear 2 of body.

Body plain silver in adult, silver on side, brown above and yellow below in juvenile; black blotch on body wall inside upper corner of operculum; spiny dorsal shades from grey base to black margin; anal fin membrane usually dusky; rear 2-1/3 of pelvic fin dusky in adults; small fish with 3-10 narrow bars on upper sides.

Size: 24 cm.

Habitat: schools on soft bottoms in shallow bays; juveniles in coastal lagoons and estuaries.

Depth: 0-100 m.

Southern Baja and the Gulf of California to Peru.


Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: Northern Subtropical (Cortez Province + Sinaloan Gap); Northern Tropical (Mexican Province to Nicaragua + Revillagigedos); Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo); South Temperate (Peruvian Province ); North Temperate (Californian Province &/or Northern Gulf of California).
Depth Range Max: 100 m.
Depth Range Min: 0 m.
Diet: mobile benthic worms; mobile benthic crustacea (shrimps/crabs); mobile benthic gastropods/bivalves.
Eastern Pacific Range: Northern limit=32; Southern limit=-9; Western limit=-115; Eastern limit=-78; Latitudinal range=41; Longitudinal range=37.
Egg Type: Pelagic; Pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Demersal.
Global Endemism: Tropical Eastern Pacific (TEP) endemic; East Pacific endemic; All species.
Habitat: Beach; Estuary; Sand & gravel; Soft bottom (mud, sand,gravel, beach, estuary & mangrove); Soft bottom only.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 24 cm.
Regional Endemism: Continent; Continent only; TEP endemic; Continental TEP endemic; 3 provinces (Cortez + Mexican + Panamic) endemic; All species.
Residency: Resident.
Salinity: Brackish; Marine; Freshwater.
Water Column Position: Bottom; Bottom only;


Names
Scientific source:

Links to other sites

References
  • Castri-Aguirre, J.L., Espinoza-Pérez, H. and Schmitter-Soto, J.J., 2002., Lista sitemática, biogeográfica y ecológica de la ictiofauna estuarino lagunar y vicaria de México. En: Lozano-Vilano, M. L. (Ed.). Libro Jubilar en Honor al Dr. Salvador Contreras Balderas., Universidad Autonoma de Nuevo León:117-142.
  • Castro-Aguirre, J.L., 1999., Ictiofauna estuarino-lagunar y vicaria de México., Editorial Limusa S.A. de C.V.: 1-629pp.
  • Cruz-Agüero , J. and Galvan-Magaña, F., 1993., Morphological Discrimination of Eucinostomus spp. from the Pacific Coast of Mexico., Bull. Mar. Sci., 52:819-824.
  • De la Cruz , J. , Galvan , F. , Abitia , L. A. , Rodriguez , J. and Gutierrez, F. J., 1994., Lista sistematica de los peces marinos de Bahia Magdalena, Baja California Sur (Mexico). Systematic List of marine fishes from Bahia Magdalena, Baja California Sur (Mexico)., Ciencias Marinas, 20:17-31.
  • Findley, L.T., Hendrickx, M.E., Brusca, R.C., van der Heiden, A.M., Hastings, P.A., Torre, J., 2003., Diversidad de la Macrofauna Marina del Golfo de California, Mexico., CD-ROM versión 1.0. Projecto de la Macrofauna del Golfo .  Derechos reservados de los autores y Conservación Internacional.
  • Fischer , W. , Krup , F. , Schneider , W. , Sommer , C. , Carpenter , K. E. and Niem, V. H., 1995., Guia FAO para la Identificacion de Especies de para los fines de la Pesca. Pacifico Centro-Oriental. Volumen II. Vertebrados - Parte 1., FAO2:647-1200.
  • Galván-Magaña, F., Gutiérrez-Sánchez, F., Abitia-Cárdenas, L.A., Rodríguez-Romero, J., 2000., The distribution and affinities of the shore fishes of the Baja California Sur lagoons. In Aquatic Ecosystems of Mexico: Status and Scope. Eds. M. Manuwar, S.G. Lawrence, I.F. Manuwar & D.F. Malley. Ecovision World Monograph Series., Backhuys Publishers:383-398.
  • Jimenez-Prado, P., Béarez, P., 2004., Peces marinos del Ecuador continental / Marine fishes of continental Ecuador., SIMBIOE/NAZCA/IFEA tomo 1 y 2.
  • Love, M.S., Mecklenburg, C.W., Mecklenburg, T.A., Thorsteinson, L.K., 2005., es of the West Coast and Alaska: a checklist of North Pacific and Artic Ocena species from Baja California to the Alaska-Yukon border., U.S. Department of the Interior, U.S. Geological Survey, Biological Resources Division, 288pp.
  • Ramírez Rodríguez, M., 1997., Producción pesquera en la Bahía de La Paz, B.C.S.. En Urbán Ramírez, J. y M. Ramírez Rodríguez (Eds.). La Bahía de La Paz investigación y conservación., Universidad Autónoma de Baja California Sur:273-282.
  • Rodríguez-Romero, J., Abitia-Cárdenas, L.A., Galván-Magaña, F., Gutiérrez-Sanchez, F.J., Aguilar-Palomino, B., Arvizú-Martínez, J., 1998., Ecology of fish communities from the soft bottoms of Bahía Concepción, México., Arch. Fish. Mar. Res., 46:61-76.
  • Tapia-García , M. and Ayala-Perez, G., 1997., Clave para la determinación de las especies de mojarras de México (Pisces: Gerreidae)., Revista de Biologia Tropical, 44/45:519-526.
  • Van der Heiden , A. M. and Findley, L. T., 1988., Lista de los peces marinos del sur de Sinaloa, México., Anales del Centro de Ciencias del Mar y Limnologia de la Universidad Autonoma Nacional de Mexico, 15:209-224.
  • Yáñez-Arancibia,., 1980., Taxonomía, ecología y estructura de las comunidades de peces en lagunas costeras con bocas efímeras del Pacífico de México., Publ. Esp. Cen. Cienc. Mar Limnol. Univ. Nal. Autón. Méx., (2):1-303.
  • Zahuranec, B. J., 1967., The Gerreid Fishes of the Genus Eucinostomus in the Eastern Pacific., Univ. California:106.

Acknowledgements

I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.


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