Species and habitats - Scyliorhinus canicula - All ages - Recurrence - IBTS Q...
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Species habitat occupation, observed during the first quarter IBTS from 1980 to 2010, has been expressed as rare, occasional, frequent, recurrent depending on density levels and...
1980年至2010年第一季度开展的国际底层拖网调查（International Bottom Trawl Survey，IBTS）所观测得到的物种栖息地占用状况，已依据种群密度水平被划分为稀有、偶见、常见、周期性频发四类，且……
