Studies on Rainbow Trout Egg (Salmo gairdnerii irideus). V. Further Studies on the Yolk Protein during Embryogenesis
نویسندگان
چکیده
There have been found at least three kinds of protein m the yolk throughout the embryogenesis of rainbow trout, by electrophoretic analysis1l. In rainbow trout it is well known that the egg hatches out in 20-30 days after fertilization and the yolk content in the sac fry lasts for a further period of 20-30 days, then signs of starvation begin to appear. Therefore, it was suggested that the yolk sac content resulted in heavy loss at the starvation period. Changes of the yolk content at various stages of embryogenesis have been reported in previous paper1l. However, no major variations in yolk reserve could be detected until hatching. The decrease of yolk content mainly takes place after hatching, and the low molecular substances produced are accumulated in the yolk sac at the later stage of the development. It appeared that the accumulation of low molecular substance in yolk was more rapid than the absorption ay alevinll, This paper describes further details of the properties of the yolk during embryogenesis.
منابع مشابه
Biochemical and histological studies of over-ripened oocyte in the Caspian brown trout (Salmo trutta caspius) to determine biomarkers for egg quality
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متن کاملBiochemical and histological studies of over-ripened oocyte in the Caspian brown trout (Salmo trutta caspius) to determine biomarkers for egg quality
The aims of the present study were to determine the best time for egg stripping after ovulation and to study oocyte over-ripening in the Caspian brown trout (Salmo trutta caspius). Eggs were retained in the female abdominal cavity for 40 days post ovulation (DPO). Partial volumes of eggs stripped from 10 individually identified females at 10 days intervals and fertilized with a pool of semen ...
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