NEKTON (ANIMAL ECOLOGY)
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BTPELAGIC FAUNA (ANIMAL ECOLOGY)
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UDC591.52,311.122
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Descriptor GERNEKTON (TIERÖKOLOGIE)
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Descriptor ENGNEKTON (ANIMAL ECOLOGY)
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Descriptor FRENECTON (ÉCOLOGIE ANIMALE)
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RTBIOCOENOSES, SYNECOLOGY, ECOSYSTEMS (HYDROBIOLOGY)