摘要
本文叙述了在室内控制条件下,温度和盐度对海蜇碟状体生长、发育的影响,实验表明,碟状体适宜温度为10—25℃,其中15—20℃为最适宜,在这温度范围内,碟状体生长迅速,平均伞径每天以0.5毫米的速度增长,碟状体最大忍耐力,最低水温在5℃,最高温度为25—30℃。致死临界温度是35℃左右。碟状体生长的适合盐度是9.89—33.63‰,最适盐度为13.84—26.26‰,影响碟状体生长的最高和最低临界盐度约为7.05‰和36.58‰。碟状体对 PH 适应范围较广,在 PH6-9的海水中都可以生活,最适 PH 浓度为8.0左右。
The effects of temperature and salinity on the growth and development of the ephyrae of the jellyfish (R. esculenta K.) under controlled room coditions have been investigated. The results obtained show that the suitable temperatures for the development of ephyrae range from 10℃ to 25℃ and the optimum temperature is 15-20°. Under this range of temperature ephyrae grow rapidly. The average diameter of umbrella enlarges at a rate of 0.5 mm per day. The extrenes of temperature tolerance are the highest 30℃, the lowest 5℃. The lethal critical temperature is about 35℃. The suitable salinity range for the growth of ephyrae is 9.89-33.63‰, the optimum 13.84-26.26‰. The highest and lowest critical concentrations are about 7.05‰ and 36.58‰ respectively. The ephyrae have a narrow range of adaptability to pH values. The survival range a is 6.0-9.0, with the optimum about 8.0.
