GAS AND BUBBLE PRODUCTION BY SIPHONOPHORES.
Abstract
Gas-filled siphonophore floats collected from a deep scattering layer (DSL) were photographed in the act of voluntarily expelling bubbles of nearly pure carbon monoxide. These observations suggest the possible release of free bubbles in the sea at depths considerably greater than previously known. Such free bubbles, together with the siphonophore floats themselves, constitute a biological family of potentially resonant sonar targets. Measurements of rates of gas production and diffusion, and of bubble and float dimensions, indicate the possibility of acoustic targets within the DSL which will resonate in response to sonar frequencies of less than 10 to greater than 110 kc/s depending upon depth. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1967
- Accession Number
- AD0662409
Entities
People
- George V. Pickwell
Organizations
- Naval Undersea Warfare Center