Overview
Comprehensive Description
Biology
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Eschmeyer, W.N., E.S. Herald and H. Hammann 1983 A field guide to Pacific coast fishes of North America. Houghton Mifflin Company, Boston, U.S.A. 336 p. (Ref. 2850)
http://www.fishbase.org/references/FBRefSummary.php?id=2850&speccode=2592
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Distribution
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Gillespie, G. E. 1993. An updated list of the fishes of British Columbia, and those of interest in adjacent waters, with numeric code designations. Can. Tech. Rep. Fish. Aquat. Sci. 1918: 116 p.
http://www.marinespecies.org/aphia.php?p=sourcedetails&id=155121
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Hart, J.L., 1973. Pacific Fishes of Canada. Fish. Res. Bd. Can. Bull 180. 740 pages.
http://www.marinespecies.org/aphia.php?p=sourcedetails&id=147633
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Eschmeyer, W.N., E.S. Herald and H. Hammann 1983 A field guide to Pacific coast fishes of North America. Houghton Mifflin Company, Boston, U.S.A. 336 p. (Ref. 2850)
http://www.fishbase.org/references/FBRefSummary.php?id=2850&speccode=2592
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Range Description
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National Distribution
Canada
Origin: Native
Regularity: Regularly occurring
Currently: Present
Confidence: Confident
Type of Residency: Year-round
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Physical Description
Morphology
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Hart, J.L. 1973 Pacific fishes of Canada. Bull. Fish. Res. Board Can. 180:740 p. (Ref. 6885)
http://www.fishbase.org/references/FBRefSummary.php?id=6885&speccode=2594
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Size
Max. size
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Eschmeyer, W.N., E.S. Herald and H. Hammann 1983 A field guide to Pacific coast fishes of North America. Houghton Mifflin Company, Boston, U.S.A. 336 p. (Ref. 2850)
http://www.fishbase.org/references/FBRefSummary.php?id=2850&speccode=2592
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Shanks, A.L. and G.L. Eckert 2005 Population persistence of California Current fishes and benthic crustaceans: a marine drift paradox. Ecol. Monogr. 75:505-524. (Ref. 56049)
http://www.fishbase.org/references/FBRefSummary.php?id=56049&speccode=4150
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Diagnostic Description
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Hart, J.L. 1973 Pacific fishes of Canada. Bull. Fish. Res. Board Can. 180:740 p. (Ref. 6885)
http://www.fishbase.org/references/FBRefSummary.php?id=6885&speccode=2594
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Ecology
Habitat
Environment
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Eschmeyer, W.N., E.S. Herald and H. Hammann 1983 A field guide to Pacific coast fishes of North America. Houghton Mifflin Company, Boston, U.S.A. 336 p. (Ref. 2850)
http://www.fishbase.org/references/FBRefSummary.php?id=2850&speccode=2592
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Habitat and Ecology
Systems
- Marine
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Water temperature and chemistry ranges based on 2 samples.
Environmental ranges
Depth range (m): 1 - 195.81
Temperature range (°C): 8.018 - 8.165
Nitrate (umol/L): 23.221 - 28.779
Salinity (PPS): 33.409 - 34.038
Oxygen (ml/l): 2.115 - 3.625
Phosphate (umol/l): 1.970 - 2.301
Silicate (umol/l): 34.412 - 40.325
Graphical representation
Depth range (m): 1 - 195.81
Temperature range (°C): 8.018 - 8.165
Nitrate (umol/L): 23.221 - 28.779
Salinity (PPS): 33.409 - 34.038
Oxygen (ml/l): 2.115 - 3.625
Phosphate (umol/l): 1.970 - 2.301
Silicate (umol/l): 34.412 - 40.325
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Recorded at 183 meters.
Habitat: benthopelagic.
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Migration
Non-Migrant: No. All populations of this species make significant seasonal migrations.
Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).
Locally Migrant: No. No populations of this species make annual migrations of over 200 km.
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Associations
Known prey organisms
Engraulis mordax
zooplankton
Based on studies in:
USA: California, Southern California (Marine, Sublittoral)
This list may not be complete but is based on published studies.
- T. A. Clark, A. O. Flechsig, R. W. Grigg, Ecological studies during Project Sealab II, Science 157(3795):1381-1389, from p. 1384 (1967).
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Known predators
Sebastes miniatus
Scorpaena guttata
Zalophus californianus
Based on studies in:
USA: California, Southern California (Marine, Sublittoral)
This list may not be complete but is based on published studies.
- T. A. Clark, A. O. Flechsig, R. W. Grigg, Ecological studies during Project Sealab II, Science 157(3795):1381-1389, from p. 1384 (1967).
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Life History and Behavior
Life Cycle
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Macchi, G.J. 1998 Preliminary estimate of spawning frequency and batch fecundity of striped weakfish, Cynoscion striatus, in coastal waters off Buenos Aires province. Fish. Bull. 96(2):375-381. (Ref. 27784)
http://www.fishbase.org/references/FBRefSummary.php?id=27784&speccode=422
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Life Expectancy
Lifespan, longevity, and ageing
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Molecular Biology and Genetics
Molecular Biology
Barcode data: Genyonemus lineatus
There are 7 barcode sequences available from BOLD and GenBank. Below is a sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species. See the BOLD taxonomy browser for more complete information about this specimen and other sequences.
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Download FASTA File
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Statistics of barcoding coverage: Genyonemus lineatus
Public Records: 7
Specimens with Barcodes: 7
Species With Barcodes: 1
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Conservation
Conservation Status
IUCN Red List Assessment
Red List Category
Red List Criteria
Version
Year Assessed
Assessor/s
Reviewer/s
Contributor/s
Justification
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Trends
Population
Population Trend
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Threats
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IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
http://www.fishbase.org/references/FBRefSummary.php?id=57073
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Management
Conservation Actions
Monitoring of the population trends and harvest levels of this species is needed.
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Relevance to Humans and Ecosystems
Benefits
Importance
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Eschmeyer, W.N., E.S. Herald and H. Hammann 1983 A field guide to Pacific coast fishes of North America. Houghton Mifflin Company, Boston, U.S.A. 336 p. (Ref. 2850)
http://www.fishbase.org/references/FBRefSummary.php?id=2850&speccode=2592
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Food and Agriculture Organization of the United Nations 1992 FAO yearbook 1990. Fishery statistics. Catches and landings. FAO Fish. Ser. (38). FAO Stat. Ser. 70:(105):647 p. (Ref. 4931)
http://www.fishbase.org/references/FBRefSummary.php?id=4931&speccode=228
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Wikipedia
White croaker
White croaker (Genyonemus lineatus) is a species of croaker occurring in the Eastern Pacific. White croakers have been taken from Magdalena Bay, Baja California, to Vancouver Island, British Columbia, but are not abundant north of San Francisco. White croakers swim in loose schools at or near the bottom of sandy areas. Sometimes they aggregate in the surf zone or in shallow bays and lagoons. Most of the time they are found in offshore areas at depths of 3 to 30 meters (10 to 100 feet). On rare occasions they are fairly abundant at depths as great as 200 meters (600 feet).
The white croaker is the only species of in the genus Genyonemus. Other common names for the fish include Pasadena trout, tommy croaker, and little bass.
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Description
The body of the white croaker is elongate and somewhat compressed. The head is oblong and bluntly rounded, with a mouth that is somewhat underneath the head. The color is incandescent brownish to yellowish on the back becoming silvery below. The fins are yellow to white. The white croaker is one of five California croakers that have mouths located under their heads (subterminal). They can be distinguished from the California corbina and yellowfin croaker by the absence of a single fleshy projection, or barbel, at the tip of the lower jaw. The 12 to 15 spines in the first dorsal fin serve to distinguish white croakers from all the other croakers with sub-terminal mouths, since none of these has more than 11 spines in this fin.
White croakers eat a variety of fishes, squid, shrimp, octopus, worms, small crabs, clams and other items, either living or dead. While the ages of white croakers have not been determined conclusively, it is thought that some live as long as 15 or more years. Some spawn for the first time when they are between 2 and 3 years old. At this age they are only 12 to 15 cm (5 to 6 inches) long and weigh less than 45 grams (0.10 pound). Also have barbels on the lower lip. The largest recorded specimen was 41.4 cm (16.3 inches), no weight recorded; however, a 36.8 cm (14.5 in) white croaker weighed 640 grams (1 lb 6½ oz).
Fishing information
These fish can be caught on almost any kind of animal bait that is fished from piers or jetties in sandy or sandy mud areas. In fact, they are so easily hooked that most anglers consider them a nuisance of the worst sort. If a person desires to fish specifically for white croakers a tough, difficult-to-steal bait, such as squid, is recommended. When hooked, they put up little or no fight. Fishing and catching is good throughout the year.
Cuisine
White croaker meat has been used as a co-ingredient in creating Crab stick.
References
- Much of this article is copied from California Marine Sportfish by the California Department of Fish and Game, Marine Region; a public domain resource.[1]
- Froese, Rainer, and Daniel Pauly, eds. (2006). "Genyonemus lineatus" in FishBase. 5 2006 version.
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