Baltic larval cod Gaaus mornua are infested with a protistan endoparasite in the yolk sac

Baltic larval cod Gadus morhua are infested with a protistan endoparasite in the yolk sac

A protistan endoparasite was d~scovered in the yolk of embryos and larvae of cod Gadus morhua L. from the Baltic. The prevalence of infestation ranged from 0 to 30 ":>. Two stages of the parasite were identified under transmiss~on electron microscopy. One stage was apparently mononucleated; the other stage was multinucleated and seemed to be b reak~ng-up into numerous, mononucleated organisms. ...

Are Abnormal Yolk Sac Characteristics Important Factors in Abortion Rates?

are abnormal yolk sac characteristics important factors in abortion rates?

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The effect of temperature on embryonic and yolk-sac larval development in the burbot Lota lota.

The present study investigated the effect of various temperature regimes on embryonic and yolk-sac larval development of the burbot Lota lota. At constant temperature regimes a high percentage of ready-to-hatch embryos, hatched larvae and normally shaped larvae was observed at the lowest temperature (2° C), which significantly decreased with increasing temperatures (4 and 6° C). No larvae hatch...

YOLK SAC TUMOR OF VAGINA

   Malignant germ-cell tumors (MGCT) are rare tumors of childhood accounting for less than 3% of pediatric malignancies. Endodermal sinus tumor (EST) forms the most common histologic subtype of MGCT. The vagina is an extremely rare site for GCTs. An 8-month-old female was admitted with a short history of vaginal bleeding, and a mass protruding from the vagina. She was pale and a mass was palpab...