Silina A V, Zhukova N V
Izv Akad Nauk Ser Biol. 2007 Jan-Feb(1):68-74.
Two parts of the population of Japanese scallop Mizuhopecten yessoensis inhabiting sites with different bottom sediments in an open part of Peter the Great Bay of the Sea of Japan were compared. The scallops grew slower on muddy site compared to sandy site despite better food availability at muddy site. The food sources were determined using fatty acids as biomarkers. Analysis of the fatty acid composition of the scallops has identified diatom plankton, flagellates, and invertebrate larvae as the main scallop food sources. Benthic bacteria insignificantly contributed to the scallop diet. The food composition slightly varied in scallops on different sediment types. Most likely, low oxygen content in water, high resuspension of fine sediment particles rich in dead organic matter, and high content of contaminants accumulated in muddy sediments are the main factors of decelerated growth of scallops on muddy sites.
对栖息在日本海彼得大帝湾开阔海域不同底质沉积物区域的两种虾夷扇贝群体进行了比较。尽管泥质区域的食物供应更好，但与砂质区域相比，泥质区域的扇贝生长较慢。利用脂肪酸作为生物标志物确定了食物来源。对扇贝脂肪酸组成的分析表明，硅藻浮游生物、鞭毛虫和无脊椎动物幼虫是扇贝的主要食物来源。底栖细菌对扇贝饮食的贡献微不足道。不同沉积物类型的扇贝食物组成略有差异。很可能是水中的低氧含量、富含死亡有机物的细颗粒沉积物的高再悬浮以及泥质沉积物中积累的高含量污染物是泥质区域扇贝生长减缓的主要因素。
