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Gobiosoma nudum (Meek and Hildebrand, 1928)
KNOBCHIN GOBY
Knob-chin goby

Life   Vertebrata   Fish   Gobiidae   Gobiosoma

Gobiosoma nudum
© Copyright Ross Robertson, 2006 · 12
Gobiosoma nudum

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Gobiosoma nudum
© Copyright Gerald Allen, 2006 · 0
Gobiosoma nudum
Gobiosoma nudum
© Copyright Photographer/SFTEP, 2002 · 0
Gobiosoma nudum

Gobiosoma nudum
© Copyright Photographer/SFTEP, 2002 · 0
Gobiosoma nudum
español

Overview
Main identification features
  • mid-snout: 1 papilla
  • female: body and ds: ~8 dark and white bars
  • male:dark, dorsal fin - white border
  • chin: 2 barbels
  • 2-3 bars under eye
  • scales - none or 1-4 behind pectoral + 2 on tail fin base
Dorsal rays VII + I, 11-12; anal rays I, 9; pectoral rays 18-20; pelvic disc present; scales usually absent (sometimes 1-4 scales just behind base of pectoral fin and two scales on base of tail fin); tip of snout with a small central fleshy knob; chin with 2 small barbels; first dorsal spine of males not prolonged.

Head and body with grey-brown irregular bars that have numerous pales spots superimposed on them; midlateral row of small elongate dark spots in middle of each dark bar.

Size: reaches 4.5 cm.

Inhabits tide pools and shallow rocky reefs.

Depth: 0-10 m.

Southern Baja California and Mazatlan (Mexico) to Colombia.

A species that has passed through the Panama Canal to the Atlantic.


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).
Depth Range Max: 10 m.
Depth Range Min: 0 m.
Diet: mobile benthic gastropods/bivalves; mobile benthic crustacea (shrimps/crabs); mobile benthic crustacea (shrimps/crabs); mobile benthic worms.
Eastern Pacific Range: Northern limit=25; Southern limit=3; Western limit=-112; Eastern limit=-78; Latitudinal range=22; Longitudinal range=34.
Egg Type: Benthic; Pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Reef Associated.
Global Endemism: Tropical Eastern Pacific (TEP) endemic; East Pacific endemic; All species.
Habitat: Estuary; Sand & gravel; Rocks; Soft bottom (mud, sand,gravel, beach, estuary & mangrove); Freshwater; Reef and soft bottom; Reef (rock &/or coral).
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 4.5 cm.
Regional Endemism: Continent; Continent only; TEP endemic; Continental TEP endemic; 3 provinces (Cortez + Mexican + Panamic) endemic; All species.
Residency: Resident.
Salinity: Brackish; Non Marine; Freshwater.
Water Column Position: Bottom; Bottom only;


Names
Scientific source:

Links to other sites

References
  • Böhlke , J.E and Robins, C.R., 1968., Western Atlantic seven-spined gobies, with descriptions of ten new species and a new genus, and comments on Pacific relatives., Proc. Acad. Nat. Sci. Phila., 120(3):45-174.
  • 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.
  • Hoese, D.F., 1971., A revision of the eastern Pacific species of the gobiid fish genus Gobiosoma, with a discussion of the relationships of the genus. Ph.D. diss. Univ. California, San Diego., University of California:213pp.
  • Lopez , M. I. and Bussing, W. A., 1982., Lista provisional de los peces marinos de la Costa Rica., Revista de Biologia Tropical, 30(1):5-26.
  • 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.
  • McCosker , J. E. and Dawson, C. E., 1975., Biotic passage through the Panama Canal, with particular reference to fishes., Marine Biology, 30:343-351.
  • Meek , S.E. and Hildebrand, S.F., 1928., The marine fishes of Panama. Part III., Field Mus. Nat. Hist., Zool. Ser. Publ., XV:709-1045.
  • Rubinoff , R. W. and Rubinoff, I., 1969., Observations on the Migration of a Marine Goby Through the Panama Canal., Copeia, 1969:395-397.
  • Thomson , D.A. , Findley , L.T. and Kerstitch, A.N., 2000., Reef fishes of the Sea of Cortez., University of Texas Press(Revised Ed.):353.
  • 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.
  • Villareal-Cavazos, A., Reyes-Bonilla, H., Bermúdez-Almada, B. and Arizpe-Covarrubias, O., 2000., Los peces del arrecife de Cabo Pulmo, Golfo de California, México: Lista sistemática y aspectos de abundancia y biogeografía., Rev. Biol. Trop., 48:413-424.

Acknowledgements

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


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