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Surf Smelt

Hypomesus pretiosus (Girard 1854)

Lifespan, longevity, and ageing

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Maximum longevity: 5 years (wild)
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Joao Pedro de Magalhaes
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de Magalhaes, J. P.
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Diagnostic Description

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Vomer small, without posterior process; periphery of glossohyal bone with single row of blunt teeth, a few teeth located irregularly at center of distal region; base of adipose fin less than 20% of head length; eye small; adipose eyelid well developed (Ref. 33312). Distinguished by its midlateral scale count of 66 to 73 and the presence of 4 to 7 pyloric caeca (Ref. 27547). Lateral line short and incomplete, reaching about to tip of pectorals (Ref. 27547). Adipose sickle-shaped; pectorals small; pelvic fins originating behind or below dorsal origin (Ref. 6885). Light olive green to brownish on back, sides and belly silvery and iridescent with a bright reflecting band along the side in living specimens; males show more golden hues than females during spawning season (Ref. 6885). Branchiostegal rays: 7-8 (Ref. 35792).
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Recorder
Cristina V. Garilao
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Life Cycle

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Schools approach the beach to spawn, usually with the females appearing a few days before the males. At spawning, large numbers of males mill about near the edge of the surf. When a female is seen, numbers of males pursue her and try to get into spawning position. If she swims to deeper water, the males desert her. 1 to 5 males swim parallel to and slightly behind a ripe female. The males press against the female and as they reach water 2.5 to 5 cm deep, the fish bend and vibrate, releasing eggs and sperm, then retreat to deeper water. The spawning act may be repeated on several successive waves. Wave action buries the eggs, usually to a depth of 2.5 to10 cm but sometimes to as deep as 30 cm (Ref. 27547).
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Morphology

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Dorsal spines (total): 0; Dorsal soft rays (total): 9 - 11; Analspines: 0; Analsoft rays: 12 - 17; Vertebrae: 64 - 67
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Trophic Strategy

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Individuals 3.5 cm may ascend rivers, presumably returning to the sea shortly after (Ref. 27547). Presumably young move offshore and reappear inshore as mature adults (Ref. 27547). At sea, they feed on small crustaceans, worms and jellyfish, as well as larval fishes (Ref. 6885, 10276). Feeds on fish, benthic animals and zooplankton (Ref. 6885).
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Pascualita Sa-a
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Biology

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Individuals 3.5 cm may ascend rivers, presumably returning to the sea shortly after (Ref. 27547). Presumably young move offshore and reappear inshore as mature adults (Ref. 27547). At sea, they feed on small crustaceans, worms and jellyfish, as well as larval fishes (Ref. 6885, 10276). Females reach age 3, males age 2 (Ref. 27547). Oviparous, with demersal eggs and planktonic larvae (Ref. 35792). Eggs are laid on beaches with heavy surf action (Ref. 33312).
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Susan M. Luna
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Importance

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fisheries: commercial; gamefish: yes
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Hypomesus pretiosus

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Hypomesus pretiosus, or surf smelt, is a marine smelt with a range from Prince William Sound, Alaska to Long Beach, California, although its population declines south of San Francisco. The surf smelt grows to be about 10 inches in southern waters, and 834 inches in northern waters near Canada. On average, surf smelt weigh about 10 to the pound.[1]

Spawning occurs in the nighttime, which is why it is sometimes called the night smelt,[2] peaking in the months from May to October. With a maximum age of three to four years, some females will spawn at the age of one, and all will spawn at the age of two. Females lay from 1,500-30,000 sticky eggs in the surf zone per spawn, which they may do three to five or more times in a season.[1]

H. pretiosus feed on polychaete worms, larval fish and jellyfish, but they primarily feed on small crustaceans. They can be important parts of salmon and halibut diets, and are the most economically important fish among California smelts. Around 225,000 kilograms are harvested there every year.[1][3]

References

  1. ^ a b c Fitch JE, Lavenberg RJ. Tidepool and nearshore fishes of California. University of California Press; 1975. ISBN 978-0-520-02845-6. p. 92.
  2. ^ Eschmeyer WN, Peterson RT, Herald ES. A field guide to Pacific coast fishes: North America. Houghton Mifflin Harcourt; 1999. ISBN 978-0-618-00212-2. p. 80.
  3. ^ Moyle PB. Inland fishes of California. 2nd ed. California: University of California Press; 2002. ISBN 978-0-520-22754-5. p. 226.
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Hypomesus pretiosus: Brief Summary

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Hypomesus pretiosus, or surf smelt, is a marine smelt with a range from Prince William Sound, Alaska to Long Beach, California, although its population declines south of San Francisco. The surf smelt grows to be about 10 inches in southern waters, and 83⁄4 inches in northern waters near Canada. On average, surf smelt weigh about 10 to the pound.

Spawning occurs in the nighttime, which is why it is sometimes called the night smelt, peaking in the months from May to October. With a maximum age of three to four years, some females will spawn at the age of one, and all will spawn at the age of two. Females lay from 1,500-30,000 sticky eggs in the surf zone per spawn, which they may do three to five or more times in a season.

H. pretiosus feed on polychaete worms, larval fish and jellyfish, but they primarily feed on small crustaceans. They can be important parts of salmon and halibut diets, and are the most economically important fish among California smelts. Around 225,000 kilograms are harvested there every year.

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