List of frequency studies for Parastromateus niger
Locality Year
from - to
Sex Gear Frequency type
Lingayen gulf, Philippines 1978 - 1979 females  trawls  absolute number measured 
Lingayen gulf, Philippines 1978 - 1979 males  trawls  absolute number measured 
Java Sea (Central Java), Indonesia 1979 - 1979 unsexed/mixed  trawls  absolute number measured 
not specified, Hong Kong 1973 - 1974 unsexed/mixed  trawls  absolute number measured 
Samar sea, Philippines 1979 - 1980 unsexed/mixed  trawls  absolute number measured 
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