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Swimbladder Morphology and Target Strength of Myctophid Fishes in the Northwestern Pacific
Swimbladder Morphology Myctophid Fishes Northwestern Pacific
2009/8/19
Swimbladder shapes of 5 myctophid species captured around northern Japan were measured using an X-ray method. The species were classified into swimbladder and swimbladderless fishes according to the p...
Measurements of Sound-Speed in the Tissue of Juvenile Southern Bluefin Tuna(Thunnus maccoyii)for Target Strength Estimation
Juvenile Southern Bluefin Tuna Thunnus maccoyii Target Strength Estimation
2009/8/19
The ratio between the speed of sound in animals and that of the surrounding water (the sound-speed contrast), particularly for fish lacking any gas-filled organs or for zooplankton, is an important pa...
Measurements of Specific Density of and Sound Speed in Nomura's Jellyfish Nemopilema nomurai to Estimate their Target Strength using a Theoretical Scattering Model
Specific Density Nomura's Jellyfish Nemopilema nomurai Theoretical Scattering Model
2009/8/19
The jellyfish Nemopilema nomurai, which reaches up to 2 m in diameter and 200 kg in weight, has appeared in large numbers in the Sea of Japan during the last several years and has had a negative effec...