“... during half-hour trawls, in seven different localities at four different depths (20, 40, 60, 80 m). A...”
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“... Pacific region. Eighty-four shrimp trawls were done at seven localities, with four stations within each...”
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“... of the sediments showed that the system is made up of four basic types: sandy silt, clayey silt, fine to medium...”
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“... were visited during each cruise at four different depths (20, 40, 60 and 80 m), with paired shrimp...”
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