MEPS 170:287-290 (1998) - doi:10.3354/meps170287
Schooling of the vertically migrating mesopelagic fish Maurolicus muelleri in light summer nights
Stein Kaartvedt1,*, Tor Knutsen2, Jens Christian Holst2
*E-mail: stein.kaartvedt@bio.uio.no
ABSTRACT: Vertically migrating Maurolicus muelleri arrested their nocturnal ascent below the peak zooplankton concentrations during light summer nights at 62°N. At 69°N, the behavior was further modified, with M. muelleri forming schools in the upper layer at night. We suggest that M. muelleri used schooling as an antipredator strategy due to the absence of dark periods.
KEY WORDS: Planktivorous fish · Acoustic scattering layer · DVM · Midnight sun
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