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Morphological development of halibut (Hippoglossus hippoglossus) larvae with special reference to mouth development and metamorphosis
Pittman, K.; Berg, L.; Naas, K. (1987). Morphological development of halibut (Hippoglossus hippoglossus) larvae with special reference to mouth development and metamorphosis. CM Documents - ICES, C.M. 1987(F:18). International Council for the Exploration of the Sea: [s.l.]. [no pag.] pp.
Part of: ICES CM Documents - ICES. ICES: Copenhagen. ISSN 1015-4744, more

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Keywords
    Metamorphosis; Hippoglossus hippoglossus (Linnaeus, 1758) [WoRMS]; Marine

Authors  Top 
  • Pittman, K.
  • Berg, L.
  • Naas, K.

Abstract
    Halibut (Hippoglossus hippoglossus) larvae were raised from hatching to beyond metamorphosis in 11.5 m³ plastic bags with a temperature stable around 6° C. Standard length, myotome height, eye diameter and yolk sac length were measured on live or freshly preserved material. Mouth development and functionality, pectoral and pelvic fin development, intestinal development and the initiation of peristaltic contractions, and eye pigmentation and migration were observed from live material. The gape of the jaws was limited by an oral membrane which appeared coincident with the developing mouth and which persisted in either full or remnant form up to around the time of first feeding. The phenomena of yolk sac vesicles and the Non-reducing Yolk Sac Syndrome are discussed.

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