Fidhiany L, Winckler K
Research and Development Center for Limnology, Bogor, Indonesia.
Comp Biochem Physiol A Mol Integr Physiol. 1998 Feb;119(2):613-9. doi: 10.1016/s1095-6433(97)00474-1.
The oxygen consumption of a freshwater convict cichlid (Cichlasoma nigrofasciatum) was determined throughout the fish development from age 74 days to 403 days, covering the period before and after maturation. The specific oxygen consumption decreases with increasing age. The decrease in metabolic rate appears rather in distinct phases. A small increase in the average specific metabolic rate (mainly from the bigger fish) around age 200 days suggests an involvement of internal changes in the fish during a transition period from "young" state to "mature" state. The relationship between the specific oxygen consumption and body mass is determined by maturation and age. Before reaching maturation (before age 200 days) the correlation between specific oxygen consumption and body mass is negative for "young" fish of the same age. After age 200 days, no correlation between both parameters could be found. We suggest from this study that both factors "age" and "size" of the organism have to be considered for determining the metabolism, especially in fish. This study indicates that even in fish, which retain a continuous growing capability until they die, the decrease in the specific oxygen consumption is related to the aging process.
测定了淡水丽鱼科鱼类（黑带丽体鱼）从74日龄到403日龄整个发育过程中的耗氧量，涵盖了成熟前后的时期。单位体重耗氧量随年龄增长而降低。代谢率的下降呈现出相当明显的阶段。在约200日龄时平均单位体重代谢率略有增加（主要来自较大的鱼），这表明在从“幼体”状态向“成熟”状态的过渡期内，鱼体内发生了内部变化。单位体重耗氧量与体重之间的关系由成熟度和年龄决定。在达到成熟之前（200日龄之前），对于相同年龄的“幼鱼”，单位体重耗氧量与体重之间的相关性为负。200日龄之后，未发现这两个参数之间存在相关性。我们从这项研究中建议，在确定新陈代谢时，必须考虑生物体的“年龄”和“大小”这两个因素，尤其是在鱼类中。这项研究表明，即使在鱼类中，它们直到死亡都保持持续生长的能力，单位体重耗氧量的降低也与衰老过程有关。
