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Rev. biol. mar. oceanogr. 51(3): 675-680

Embryonic and larval development of Dissostichus eleginoides (Pisces: Nototheniidae)

Armando Mujica1, Daniela Peñailillo1, Alberto Reyes2 and María Luisa Nava1

1Departamento de Acuicultura, Universidad Católica del Norte,  P.O. Box 117, Coquimbo, Chile
2Corporación de Educación La Araucana, Puerto Montt, Chile
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Resumen

This is the first description of the embryonic and early larval development of laboratory-reared (4-8°C) Dissostichus eleginoides. Specimens were periodically sampled to describe egg and larval development. Eggs were spherical (3.1-3.5 mm diameter) and had a transparent chorion and slightly rough surface, with 28 oil globules located around the germinal pole. Eggs incubated between 30 and 33 days until hatching. At day 18 post-hatching, the yolk sac was absorbed by vitellogenic larvae (8-13 mm total length), after which, the fin rays started to develop, pigmentation increased, and main melanophore aggregation zones were distinguished on the posterodorsal part of the head, the intestine, and before the caudal peduncle. The hypural complex was fully formed by day 57 post-hatching (49-53 mm standard length).

Palabras clave

Dissostichus eleginoides, embryonic and larval development