Growth histories of strombid snails from Bermuda recorded in their O-18 and C-13 profiles
Growth histories of strombid snails from Bermuda recorded in their O-18 and C-13 profiles
复制标题
百慕大强螺的 O-18 和 C-13 剖面记录了它们的生长历史
DOI：
--
复制
发表时间：
1980
期刊：
影响因子：
--
通讯作者：
J. Killingley
中科院分区：
文献类型：
--
作者：
G. Wefer;J. Killingley
18O/16O和13C/12C的同位素比值显示出百慕大螺种Strombus gias和S.coStatus的年际周期性。大根链霉菌偏离氧同位素平衡的位移似乎是恒定的0.5‰，而共生链霉菌根据已建立的分馏关系对氧同位素进行分馏。利用这一工具，可以很容易地在同一只钉螺上测定不同时期螺体的生长情况。一条长24.8厘米的巨型金鱼的年龄为7岁，19.3厘米长的同龄为5岁，7.8厘米长的同龄为2年。根据氧同位素的年度范围，假设生长受限于一年中较温暖的时期。~(18)O和~(13)C的丰度在成虫标本和同龄标本中呈正相关，而在幼年同种标本中呈负相关。
The isotopic ratios 18O/16O and 13C/12C show an annal periodicity in the strombid snails Strombus gigas and S. costatus from Bermuda. S. gigas appears to have a constant displacement of 0.5‰ from oxygen isotopic equilibrium, whereas S. costatus fractionates the oxygen istopes in accordance with established fractionation relationships. With this tool, the growth in strombid snails during different stage can readily be determined on one and the same snail. A 24.8 cm long S. gigas showed an age of 7, a 19.3 cm long S. costatus of 5, and a 7.8 cm long S. costatus of 2 years. From the annual range in oxygen isotopes, growth restricted to warmer periods of the year is assumed. The abundances of 18O and 13C tend to be positively correlated in adult S. gigas and S. costatus speciments, but were inversely related in a juvenile S. costatus.