Shell growth and reproductive cycle of the Mediterranean mussel Mytilus galloprovincialis in Tokyo Bay, Japan: relationship with environmental conditions
Shell growth and reproductive cycle of the Mediterranean mussel Mytilus galloprovincialis in Tokyo Bay, Japan: relationship with environmental conditions
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日本东京湾地中海贻贝的贝壳生长和繁殖周期：与环境条件的关系
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发表时间：
2010
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通讯作者：
K. Tanabe
中科院分区：
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作者：
Nobuyuki Okaniwa;Tsuzumi Miyaji;Takenori Sasaki;K. Tanabe
本研究调查了日本中部东京湾的地中海贻贝Mytilus galloprovincialis的壳生长模式和生殖周期。2007年7月至2008年9月对潮间带标记贻贝的跟踪研究表明，贝壳的年生长速度非常快，寿命很短，达到最大贝壳长度（约100毫米）。70 mm）。组织学检查显示，东京湾种群的产卵季节在晚秋至春季之间，并在招募后数月达到性成熟。个别贻贝的壳生长模式显示出季节性变化，春季和夏季的壳生长率高，从晚秋到早春的生长率最低。冬季壳生长缓慢可能是由环境（较低的空气和海水温度，以及浮游植物稀少）和生理（配子发生和产卵所消耗的生殖努力）因素共同控制的。
This study investigates shell growth patterns and the reproductive cycle of the Mediterranean mussel Mytilus galloprovincialis in Tokyo Bay, central Japan. A follow-up study of marked mussels within the intertidal zone from July 2007 to September 2008 indicates a remarkably fast annual shell-growth rate and a short life span, reaching the maximum shell length (ca. 70 mm) at age 3 or 4 years. Histological examinations of mussel gonads collected fort- nightly revealed that the Tokyo Bay population has a spawning season between late autumn and spring, and attains sex- ual maturation several months after recruitment. Shell growth patterns for individual mussels show seasonal variations, with high shell-growth rates during spring and summer, and minimal growth from late autumn to early spring. Slow shell growth during winter is possibly controlled by combined environmental (lower air and seawater temperatures, and scarce phytoplankton) and physiological (the reproductive effort expended in gametogenesis and spawning) factors.