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NÚMERO 3

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Screening for WSSV in crustacean from marine areas of Buenos Aires, Argentina

A first experience of Patagonian sprat Sprattus fuegensis spawning in captivity: Adult acclimation, egg and larval measurements

Autores

CORRESPONSAL

Elson Leal

elson.leal@ifop.cl

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1

Instituto de Fomento Pesquero, Blanco 839, Valparaíso, Chile

Carlos Muñoz

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1

Instituto de Fomento Pesquero, Blanco 839, Valparaíso, Chile

Guillermo Moyano

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1

Instituto de Fomento Pesquero, Blanco 839, Valparaíso, Chile

Claudio Bernal

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1

Instituto de Fomento Pesquero, Blanco 839, Valparaíso, Chile

Antonio Aranis

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1

Instituto de Fomento Pesquero, Blanco 839, Valparaíso, Chile

Resumen

Relevant traits of eggs and larvae of Patagonian sprat (Sprattus fuegensis), obtained from adult reproduction in captivity conditions, were studied. Temperature for adult acclimation and for incubation of eggs and larvae was not controlled; however it ranged with a mean of 13 ± 2 °C. Adult sprat maintained in cylindrical ponds of 2000-L spawned spontaneously at the first night after catch, probably due to catch stress. The eggs were spherical with a diameter ranging between 0.89 and 1.06 mm (mean 1.00 ± 0.05 mm, n= 54). The larvae hatched between the fourth and fifth day after spawning and their size varied between 2.83 and 4.11 mm long (mean 3.56 ± 0.34 mm, n= 39). The yolk sac reached a volume of between 0.11 and 0.22 mm3 (mean 0.18 ± 0.033 mm3, n= 32) and was exhausted by the third day post hatching (dph). Larval growth only occurred during the endogenous feeding period (efp) and survival did not exceed 6 dph, probably due to inappropriate conditions for feeding and growth.

Palabras clave

Sprattus fuegensis, captivity, egg, larvae

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