Dutra B K, Castiglioni D S, Santos R B, Bond-Buckup G, Oliveira G T
Laboratório de Fisiologia da Conservação, Faculdade de Biociências, Programa de Pós-graduação em Zoologia, PUCRS, Brazil.
Comp Biochem Physiol A Mol Integr Physiol. 2007 Sep;148(1):239-47. doi: 10.1016/j.cbpa.2007.04.013. Epub 2007 Apr 22.
Aquatic organisms exist in a constantly fluctuating habitat, with changes in photoperiod, temperature, pH, dissolved organic content, dissolved oxygen and food supply. Organisms must alter past of their physiological and biochemical processes to cope with these changes. We compared the effect of seasonal variations in factors related to energy metabolism of two species of sympatric amphipods, Hyalella pleoacuta and Hyalella castroi. The animals were collected monthly from April 2004 through March 2006. Contents of glycogen, proteins, lipids, triglycerides and the levels of lipoperoxidation were determined in males and females throughout the year by using spectrophotometric methods. Observations revealed significant seasonal differences in biochemical composition, as well as differences among sexes and species. Environmental conditions (e.g., trophic conditions) and reproduction are supposed to be the main processes influencing the seasonal patterns of variation in biochemical composition. Both species of Hyalella show ecological and behavioral differences, especially by resources such as food, space and seasonal variations of energy metabolism, which might facilitate their coexistence in the same habitat.
水生生物存在于一个不断波动的栖息地中，光照周期、温度、pH值、溶解有机物含量、溶解氧和食物供应都会发生变化。生物体必须改变其生理和生化过程的一部分来应对这些变化。我们比较了两种同域分布的双足类动物——多刺透明钩虾（Hyalella pleoacuta）和卡氏透明钩虾（Hyalella castroi）——中与能量代谢相关的因素的季节性变化的影响。从2004年4月到2006年3月每月收集这些动物。全年使用分光光度法测定雄性和雌性动物体内糖原、蛋白质、脂质、甘油三酯的含量以及脂质过氧化水平。观察结果显示，生化组成存在显著的季节性差异，以及性别和物种之间的差异。环境条件（如营养条件）和繁殖被认为是影响生化组成季节性变化模式的主要过程。两种透明钩虾都表现出生态和行为上的差异，特别是在食物、空间等资源以及能量代谢的季节性变化方面，这可能有助于它们在同一栖息地中共存。
