Barham E G
Science. 1963 May 17;140(3568):826-8. doi: 10.1126/science.140.3568.826.
Bathyscaphe dives in the San Diego Trough have revealed a close spatial relation between siphonophores and the deep scattering layer as recorded by precision depth recording echo-sounders. Measurements of gas bubbles within the flotation structures of Nanomia bijuga captured in a closing net in an ascended scattering layer indicate that these are very close to the resonant size for 12-kcy/sec sound. Because such organisms are capable of making prolonged vertical migrations, and are widespread geographically, they are very probably the major cause of stratified zones of scattering throughout the oceans of the world.
在圣地亚哥海槽进行的深海潜水器潜水显示，管水母目动物与精密深度记录回声测深仪记录的深海散射层之间存在密切的空间关系。在上升散射层中用封闭网捕获的双生水母漂浮结构内的气泡测量表明，这些气泡非常接近12千周/秒声音的共振大小。由于这类生物能够进行长时间的垂直迁移，并且在地理上分布广泛，它们很可能是世界各大洋中分层散射区域的主要成因。
