摘要
日本刺沙蚕为典型的沉积食性底栖动物，通过大量吞食沉积物来获得能量，以维持自身的营养需求。作者于１９９６年１０月在山东省丁字湾北部泥滩潮间带采集日本刺沙蚕，利用肠道内含物分析方法测定了日本刺沙蚕对自然沉积物的摄食率，其结果为５．７１±２．７６ｍｇ．ｍｇ－１．ｄ－１，并估算出日本刺沙蚕饱食沉积物所需时间约为６．５８ｈ。日本刺沙蚕在摄食沉积物时偏向于选择较大的颗粒，这与最适觅食模型的结论相反。这一结果可用底栖生物对其栖居环境适应方式的特殊性来解释。
Neanthes japonica is an abundant, deposit feeding, infaunal inhabitant of shallow water marine environments in China and Japan. N.japonica meets its nutritional requirements by swallowing large volumes of sediment. Laboratory experiments were performed to quantify the polychaete's feeding rate on natural sediment, that is, 5.71±2.76mg sediment mg -1 body dry wt d -1 , by means of gut content analysis. The reworking rate on sediment was evaluated and the gut passage time was estimated. We also examined the possibility that size selective ingestion of sediment particles by N.japonica goes against the predictions of deposit feeders optimal foraging models, that is, N.japonica intended to select larger particles. Alternative explanations, such as the particularity of adaptation to circumstances by benthic animals, may explain the feeding behavior.
基金
国家自然科学基金
国家攀登计划B项目
