Accession Number : AD0662409

Title :   GAS AND BUBBLE PRODUCTION BY SIPHONOPHORES.

Descriptive Note : Research rept. Aug 65-Dec 66,

Corporate Author : NAVAL UNDERSEA WARFARE CENTER SAN DIEGO SAN DIEGO DIV

Personal Author(s) : Pickwell,George V.

Report Date : SEP 1967

Pagination or Media Count : 96

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)

Descriptors :   (*AQUATIC ANIMALS, BUBBLES), GASES, METABOLISM, CARBON MONOXIDE, OXYGEN CONSUMPTION, ACOUSTIC PROPERTIES, FLOATING BODIES, DIFFUSION

Subject Categories : Biology
      Biological Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE