Accession Number : AD0657443

Title :   SWIMBLADDER MORPHOLOGY OF SOME MESOPELAGIC FISHES IN RELATION TO SOUND SCATTERING.

Descriptive Note : Research rept.,

Corporate Author : NAVY ELECTRONICS LAB SAN DIEGO CALIF

Personal Author(s) : Capen,R. L.

Report Date : 20 MAR 1967

Pagination or Media Count : 35

Abstract : An examination was made of fresh and preserved specimens of Pacific lantern fishes, hatchet fishes, and hake. Most of the lantern fishes under 50-mm standard length contain gas in their swimbladders and, hence, are probably major sound scatterers. The hatchet fishes possibly contribute to scattering of nonmigratory layers. The resonance depths of the swimbladders differ widely for sound of different frequencies. Because of its larger size, the swimbladder of the hake should resonate at low frequencies.

Descriptors :   (*FISHES, *MORPHOLOGY(BIOLOGY)), (*SOUND TRANSMISSION, *UNDERWATER SOUND), SCATTERING, ACOUSTIC PROPERTIES, GASES, BUBBLES, URINARY SYSTEM, MARINE BIOLOGY, NAVAL RESEARCH

Subject Categories : Anatomy and Physiology
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE