Our extracts are placed on servers with no transfer limit. lucetia is a significant component of the sound-scattering layers in the Humboldt Current Region off Peru.Ultra-fast download speed. Maximum S a was mainly located between 11° and 18°S during day and night. Acoustic back-scattered energy (S a) was ubiquitous in the region.

lucetia was dominant in the upper and midwater peaks while myctophids, other planctivorous and piscivorous fishes were distributed in the midwater. Daytime patterns showed three peaks of abundance: an upper peak, in the upper 100 m, a midwater peak between 200 and 400 m, coinciding with an oxygen minimum zone, and a deeper peak between 400 and 500 m. Nighttime vertical distribution was characterized by a single abundance peak in the upper 50 m. aurolaternatum, Triphoturus oculeus, Bathylagus (Melanolagus) berycoides, Leuroglossus stilbius, Argyropelecus affinis, Sternoptyx obscura, Melamphaes sp., Stomias sp.

urotranus, Nemichthys fronto and Scopelarchoides nicholsi), Southern upwelling front group (Hygophum reinhardti, Myctophum nitidulum, Paralepis sp and Scopeloberyx sp.) and pan-Humboldt Current group (V. northern-central upwelling front group (L. Based on horizontal distribution patterns these species were categorized into three groups, i.e. The mesopelagic community is dominated by the families Phosichthyidae (Vinciguerria lucetia), Myctophidae (Diogenichthys laternatus and Lampanyctus idostigma) and Bathylagidae (Leuroglossus urotranus), accounting for 60.4, 12.8 and 3.7%, respectively, of the total catch. A total of 2,952 kg of fishes was collected, which included 13 families, 23 genera and 28 species. The horizontal and vertical distributions of adult mesopelagic fishes are described from acoustic and trawl surveys over the full-depth of 500 m at 169 stations on a longitudinal transect crossing the Humboldt Current (03☄5′S, 81☇6′W and 18☂3′S, 71☁3′W) at 50–200 nautical miles off Peru during austral spring (October–November) of 2001, 20.

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