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The migration behavior, fine structure, and bioluminescent activity of krill sound‐scattering layers
Author(s) -
Green Charles H.,
Widder Edith A.,
Youngbluth Marsh J.,
Tamse Armando,
Johnson Gary E.
Publication year - 1992
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1992.37.3.0650
Subject(s) - krill , bioluminescence , oceanography , trophic level , sound (geography) , environmental science , marine ecosystem , zooplankton , antarctic krill , ecosystem , ecology , biology , geology
High‐resolution SONAR and video techniques were used to quantify the migration behavior, fine structure, and bioluminescent activity of krill sound‐scattering layers (SSLs) in the Gulf of Maine. These SSLs were found to exhibit highly synchronous vertical migration behavior, considerable fine‐scale patchiness, and relatively high levels of stimulable bioluminescent activity. Our findings emphasize the highly variable and dynamic nature of krill distributions, a knowledge of which is essential to understanding their trophic role in marine ecosystems.