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These fishes have relatively chunky body shape, with a large head and large eyes, but a small mouth oriented downwards. The color is a darker grayish-bluish above, and a dull silver underneath. During the breeding season, red-orange patches appear on the chin, operculum, and at the bases of pectoral,
356:
California roaches seem to be resilient fishes that take advantage of the intermittent waters of central
California under conditions too difficult for other fishes. As the springtime streams dry up in summer, roaches accumulate in large number in pools, which may be alkaline, hot (up to 95 °F),
344:
Spawning occurs mainly from March through June. They move into shallow, flowing water, over bottoms covered with small rocks, and form up into schools. Females lay a few eggs at a time, eventually putting down from 250 to 900 eggs each. The adhesive eggs are laid in crevices, where they stick to the
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Mainly bottom feeders, filamentous algae are the main part of their diet, followed by aquatic insects and crustaceans. They will also opportunistically eat insects and crustaceans at the surface. In turn, they are eaten by other fish, in particular
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pelvic, and anal fins. The smallish dorsal fin has 7-10 rays, while the anal fin has 6-9 rays. They never get large, the maximum known being about 11 cm.
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In a recent revision of the
California roach, previously considered a single species, it was split into four distinct species and two additional subspecies:
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rocks, and then the males fertilize them. The fry continues to dwell in the crevices until they are strong enough to swim actively.
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A reappraisal of the
California Roach/Hitch (Cypriniformes, Cyprinidae, Hesperoleucus/Lavinia) species complex
352:
California roaches in their native habitat in Bear Creek within the
Berryessa-Snow Mountain National Monument.
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of its genus, it has recently been split into a number of closely related species and subspecies.
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and low in oxygen. They also seem to cope well with sewage-polluted waters.
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and abundant in the intermittent streams throughout central
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The distribution of the species complex comprises the
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396:, etc.). Populations in southern California and in
504:10.2305/IUCN.UK.2013-1.RLTS.T202131A18236415.en
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858:Taxa named by Spencer Fullerton Baird
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823:IUCN Red List least concern species
490:IUCN Red List of Threatened Species
573:UC Davis California Fishes website
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833:Fish of the Western United States
400:, Oregon, may be introductions.
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324:Characteristics of fish in the
527:Baumsteiger J, Moyle PB 2019.
1:
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261:Hesperoleucus navarroensis
248:(Baird & Girard, 1854)
592:Hesperoleucus symmetricus
548:Hesperoleucus symmetricus
531:Zootaxa 4543 (2): 221–240
483:Hesperoleucus symmetricus
445:Hesperoleucus symmetricus
413:Hesperoleucus parvipinnis
326:Hesperoleucus symmetricus
298:Hesperoleucus symmetricus
269:Hesperoleucus parvipinnis
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209:Hesperoleucus symmetricus
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70:Scientific classification
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544:; Pauly, Daniel (eds.).
439:— southern coastal roach
433:— northern coastal roach
241:Baird & Girard, 1854
239:Pogonichthys symmetricus
853:Fish described in 1854
558:. August 2011 version.
497:: e.T202131A18236415.
425:Hesperoleucus venustus
419:Hesperoleucus mitrulus
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316:. Once considered the
279:Hesperoleucus venustus
253:Hesperoleucus mitrulus
838:Fish of North America
404:Taxonomic subdivision
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479:NatureServe (2013).
368:drainage, including
447:— California roach
245:Lavinia symmetricus
191:H. symmetricus
40:Conservation status
453:— California roach
431:H. v. navarroensis
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308:native to western
848:San Joaquin River
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809:
782:Open Tree of Life
584:Taxon identifiers
459:— Red Hills roach
457:H. s. serpentinus
451:H. s. symmetricus
366:San Joaquin River
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427:— coastal roach
421:— northern roach
394:Permanente Creek
362:Sacramento River
293:California roach
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415:— Gualala roach
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16:Species of fish
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567:External links
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200:Binomial name
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171:Hesperoleucus
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127:Cypriniformes
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55:Least Concern
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508:. Retrieved
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382:Pajaro River
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828:Leuciscinae
756:NatureServe
681:iNaturalist
510:20 November
390:Adobe Creek
318:sole member
217:S. F. Baird
147:Leuciscinae
143:Subfamily:
817:Categories
466:References
374:Goose Lake
314:California
160:Laviniinae
137:Cyprinidae
761:2.1203043
370:Pit River
185:Species:
93:Kingdom:
87:Eukaryota
699:10145449
655:FishBase
607:Q3768513
601:Wikidata
555:FishBase
303:cyprinid
230:Synonyms
133:Family:
107:Chordata
103:Phylum:
97:Animalia
83:Domain:
60:IUCN 3.1
800:1017387
673:2360051
301:) is a
223:, 1854)
166:Genus:
123:Order:
113:Class:
58: (
787:536565
774:164605
738:202131
725:163565
647:994819
621:141873
221:Girard
219:&
179:, 1913
177:Snyder
795:WoRMS
745:NAS:
712:80524
694:IRMNG
686:67610
634:3L5GW
154:Clade
769:NCBI
733:IUCN
720:ITIS
668:GBIF
660:2771
616:BOLD
512:2021
495:2013
372:and
306:fish
291:The
748:543
707:ISC
642:EoL
629:CoL
499:doi
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295:(
215:(
62:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
