Do respiratory metabolic rates of the scyphomedusa Aurelia aurita scale isometrically throughout ontogeny in a sexual generation?
Do respiratory metabolic rates of the scyphomedusa Aurelia aurita scale isometrically throughout ontogeny in a sexual generation?
复制标题
scyphomedusa Aurelia aurita 的呼吸代谢率在有性世代的个体发育过程中是否呈等距变化？
作者：
J. Kinoshita;J. Hiromi;S. Kadota
我们测量了水母的呼吸速率，特别注意了在有性世代中水母个体发育过程中其代谢率与体重的关系。在10℃和15℃温度下，幼体水母(钟径4.2~19 mm，0.07~14 mg干重)和水母(BD17~120 mm，12~2100 mg干重)的呼吸速率与体重之间存在着两条不同的回归直线。水母呼吸速率的斜率接近等距标度(0.9)，而茶树对幼年水母的斜率较小(0.6)。讨论了异速生长标度在叶门和叶门早期发育阶段的生态学意义。
We measured the respiration rate of Aurelia aurita payingspecial attention to the relationship between its metabolic ratesand body mass throughout ontogeny of the jellyfish in a sexualgeneration. Two different regression lines between respirationrates and body dry weight were obtained in ephyra to young medusa(bell diameter 4.2–19 mm, 0.07–14 mg dry weight) and medusa(BD17-120 mm, 12-2100 mg DW), at respective temperatures of 10 and15 °C. The cut off point of the metabolic rates was foundat the developmental stage just being metamorphosed into medusashape (BD 12–20 mm). The slope value of medusa respiration ratewas close to isometric scaling (0.9), whereas that of ephyra toyoung medusa was lower (0.6). Ecological implications of allometricscaling in the early developmental stages of ephyrae and metephyraeare discussed.