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Atherinops affinis (Ayres, 1860)
TOPSMELT SILVERSIDE
Topsmelt

Life   Vertebrata   Fish   Atherinopsidae   Atherinops

Atherinops affinis
© Copyright Photographer/SFTEP, 2002 · 0
Atherinops affinis

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Atherinops affinis
www.fao.org Copyright Michel Lamboeuf · 0
Atherinops affinis
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Overview
Main identification features Head and body compressed; mouth small, terminal, not protrusible, with top lip folded down; eye small (<1/2 snout length); first dorsal V-IX spines, rear part over anal origin; teeth forked, in single rows on jaws; 20-25 lower rakers on first gill arch; 5-8 scales between 2 dorsal fins; pectoral reaches pelvic origin.

Green back, bright stripe on flank, silvery below.

Size: 37 cm.

Habitat: coastal bays, over muddy bottoms and algal beds.

Depth: 0-26 m.

Temperate eastern Pacific; Canada to Baja the upper Gulf of California.


Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: North Temperate (Californian Province &/or Northern Gulf of California); Northern Subtropical (Cortez Province + Sinaloan Gap).
Depth Range Max: 26 m.
Depth Range Min: 0 m.
Diet: zooplankton; pelagic fish larvae; pelagic fish eggs; phytoplankton; Insects.
Eastern Pacific Range: Northern limit=48; Southern limit=24; Western limit=-123; Eastern limit=-111; Latitudinal range=24; Longitudinal range=12.
Egg Type: Benthic; Pelagic larva.
Feeding Group: Planktivore.
FishBase Habitat: Pelagic.
Global Endemism: TEP non-endemic; East Pacific endemic; All species.
Habitat: Water column; Estuary.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 37 cm.
Regional Endemism: Continent; Temperate Eastern Pacific, primarily; Tropical Eastern Pacific (TEP) non-endemic; California province, primarily; Continent only; All species.
Residency: Vagrant.
Salinity: Brackish; Marine.
Water Column Position: Near Surface; Surface; Water column only;


Names
Scientific source:

Links to other sites

References
  • Ayres, W. O., 1860., Description of fishes., Proceedings of the California Academy of Sciences (Series 1), 2:73-77.
  • Breder, C.M. Jr., 1936., Scientific results of the second oceanographic expedition of the "Pawnee" 1926. Heterosomata to Pediculati from Panama to Lower California., Bull. Bingham Oceanogr. Collect. Yale Univ., 2(3):1-56.
  • 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.
  • 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.
  • Eschmeyer , W. N. , Herald , E. S. and Hamman, H., 1983., A field guide to Pacific coast fishes of North America from the Gulf of Alaska to Baja California. Peterson Field Guide Ser. 28., Houghton Mifflin:336pp.
  • 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.
  • Fowler, H.W., 1944., Results of the Fifth George Vanderbilt Expedition (1941) (Bahamas, Caribbean sea, Panama, Galapagos Archipelago and Mexican Pacific Islands). The Fishes., Acad. Nat. Sci. Philadel., Monographs, 6:57-529.
  • 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.
  • Jordan , D.S. and Evermann, B.W., 1896., The fishes of North and Middle America: a descriptive catalogue of the species of fish-like vertebrates found in the waters of North America, north of the Isthmus of Panama. Part I., Bull. U.S. Nat. Mus., 47:1-1240.
  • Jordan , D.S. and Gilbert, C.H., 1880., Notes on a collection of fishes from San Diego, California., Proc. U.S. Nat. Mus., 3:23-34.
  • 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.
  • Minckley, W.L., 2002., Fishes of the lowermost colorado river, its delta, and estuary: a commentary on biotic change. En: Lozano-Vilano, M. L. (Ed.). Libro Jubilar en Honor al Dr. Salvador Contreras Balderas., Universidad Autonoma de Nuevo León:63-78.
  • Osburn , R. C. and Nichols, J. T., 1916., Shore Fishes Collected by the 'Albatross' Expedition in Lower California with Descriptions of New Species., Bull. Amer. Mus. Nat. Hist., 35:139-181.
  • Pondella II, D.J., Gintert, B.E., Cobb, J.R., Allen, L.G., 2005., Biogeography of the nearshore rocky-reef fishes at the southern and Baja California islands., Journal of Biogeography, 32:187-201.

Acknowledgements

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Common name (e.g. trout)

Genus + Species (e.g. Gadus morhua)

Atherinops affinis   (Ayres, 1860)

Topsmelt silverside Add your observation in Fish Watcher
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Pictures | Google image Image of Atherinops affinis (Topsmelt silverside) Atherinops affinis
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Classification / Names Common names | Synonyms | Catalog of Fishes ( gen. , sp. ) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Atheriniformes (Silversides) > Atherinopsidae (Neotropical silversides) > Atherinopsinae
Etymology: Atherinops: Greek, atherina, the Greek name for the eperlane; 1770 + Greek, ops = appearance (Ref. 45335 ) ;   affinis: affinis which means related - in this case to fishes of the genus Atherina (Ref. 6885 ) .

Environment / Climate / Range Ecology

Marine; brackish; pelagic-neritic; depth range ? - 26 m (Ref. 96339 ).   Subtropical; 51°N - 22°N, 129°W - 107°W (Ref. 96339 )

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Eastern Pacific: Vancouver Island in British Columbia, Canada to Baja California, Mexico and the Gulf of California.

Size / Weight / Age

Maturity: L m   ?   range ? - ? cm
Max length : 37.0 cm TL male/unsexed; (Ref. 9273 ); common length : 28.0 cm TL male/unsexed; (Ref. 9273 ); max. reported age: 9 years (Ref. 72477 )

Short description Morphology | Morphometrics

Dorsal spines (total): 6 - 10; Dorsal soft rays (total): 8-14; Anal spines : 1; Anal soft rays : 19 - 25; Vertebrae : 44 - 52. Blue gray to green above, silvery below; a striking silver band bordered above with blue extends the full length of the body (Ref. 6885 ). Branchiostegal rays: 5-6 (Ref. 36497 ).

Biology     Glossary (e.g. epibenthic)

Common in bays, muddy and rocky areas and kelp beds, also in estuaries (Ref. 36497 ). Form schools. Adults feed on zooplankton (Ref. 9273 ), while juveniles feed on algae and kelp fly larvae (Ref. 4930 ). Demersal spawner in nearshore habitats (Ref. 56049 ). Oviparous, with planktonic, primarily neustonic larvae (Ref. 36497 ). Eggs are attached to spawning substrate and to one another by adhesive filaments (Ref. 36497 ).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Oviparous (Ref. 36497 ).

Main reference Upload your references | References | Coordinator | Collaborators

Eschmeyer, W.N., E.S. Herald and H. Hammann , 1983. A field guide to Pacific coast fishes of North America. Boston (MA, USA): Houghton Mifflin Company. xii+336 p. (Ref. 2850 )

IUCN Red List Status (Ref. 115185 )

  Least Concern (LC)  

CITES (Ref. 94142 )

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: commercial FAO(Publication : search ) | FisheriesWiki | Sea Around Us

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Internet sources

BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes ( gen. , sp. ) | DiscoverLife | ECOTOX | Faunafri | Fishes of Iran | Fishtrace | GenBank( genome , nucleotide ) | GloBI | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | Public aquariums | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia( Go , Search ) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805 ):  PD 50 = 1.0000   [Uniqueness, from 0.5 = low to 2.0 = high]. Bayesian length-weight: a=0.00851 (0.00457 - 0.01587), b=2.98 (2.81 - 3.15), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245 ). Trophic Level (Ref. 69278 ):  2.8   ±0.28 se; Based on food items. Resilience (Ref. 69278 ):  Medium, minimum population doubling time 1.4 - 4.4 years (tm=2; tmax=7; Fec = 1,000). Prior r = 0.48, 2 SD range = 0.24 - 0.97, log(r) = -0.73, SD log(r) = 0.35, Based on: 1 tgen, 1 tmax, 1 Fec records Vulnerability (Ref. 59153 ):  Low to moderate vulnerability (32 of 100) . Price category (Ref. 80766 ):   Unknown .

Entered by Froese, Rainer Modified by Valdestamon, Roxanne Rei Fish Forum
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