Influence of Chilling Duration on Oxygen Consumption and Hatchability in Eggs of the Silkworm, Bombyx mori

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Influence of Chilling Duration on Oxygen Consumption and Hatchability in Eggs of the Silkworm, Bombyx mori

한국잠사학회 (Korean Society Of Sericultural Science)|2004.03|International Journal of Industrial Entomology and Biomaterials|제8권 제1호|pp. 73-76

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Abstract

The rate of oxygen consumption of the silkworm eggs was measured to set up the barometer for measuring the effect of egg chilling on diapause termination. In diapause eggs, O2 uptake showed a maximum of 79.2 ml/mg eggs/hr, at one day after oviposition and then gradually decreased to 2.2 ml/mg eggs/hr at 9 days. The rates of oxygen uptake of eggs raised immediately after HCl-treatment and reached to a maximal level of 484.5 ml/mg eggs/hr in 9-day-old eggs, which corresponds to 220 fold that of diapause eggs, and the hatching ability was also over 50%. In order to break diapause, eggs incubated at 25oC for 30 days after oviposition had to be kept at least for 45 days at 5oC, but chilled eggs for 90 days or longer hatched at 10 days as normal hatching periods. We also investigate periods which the value of O2 uptake of eggs chilled during 15 to 120 days at 5oC reached at 200 ml/mg eggs/hr. As a result of that, O2 uptake of eggs chilled during 15 to 45 days were not reached at 200 ml/mg eggs/hr and longer the chilling durations are, the higher the rate of O2 uptake is and the longer the chilling durations are, the shorter the periods up to hatching is. And also, hatchability increased rapidly as O2 uptake reaches over 20 / eggs/hr

참고문헌 (23)

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