Physiological disturbance of the Manila clam, Ruditapes philippinarum, by altered environmental conditions in a tidal flat on the west coast of Korea

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• 作者：Min Jeong Baek ; Young-Jae Lee ; Kwang-Sik Choi ; Won Chan Lee ; Hyun Je Park ; Jung Hyun Kwak ; Chang-Keun Kang
• 关键词：Ruditapes philippinarum ; Physiological disturbance ; Biochemical composition ; Reproductive cycle ; Habitat alteration ; Food availability
• 刊名：Marine Pollution Bulletin
• 出版年：15 January, 2014
• 年：2014
• 卷：78
• 期：1-2
• 页码：137-145
• 全文大小：623 K

文摘

To examine the influence of habitat alteration by tideflat reclamation on the physiological ecology of Ruditapes philippinarum, seasonal variations in its condition, gross biochemical composition, and reproductive cycle were compared for a yearly cycle between a reclaimed flat (Gomsohang, GS) and a natural flat (Hajun, HJ) in Gomso Bay, Korea. Concentrations of chlorophyll a and seston (as well as its energy value as food available to the clam) were consistently higher at HJ than at GS. Condition, dry tissue weight, and energy reserves (proteins and carbohydrates) of the clams were much higher at HJ than at GS during spring-summer, when fast growth and gametogenic development occur. Furthermore, their spring gametogenic development and spawning were advanced at HJ compared with GS. Our results suggest that the Manila clam encounters nutritionally stressful environmental conditions in altered habitats after tideflat reclamation that lead to lowered nutrient accumulation and a changing reproductive cycle.