trophic level
... that the trophic level of the world fisheries catch has steadily declined because many high trophic level species, such as tuna , have been overfished?
... that the <b id="mwDx0"><a href="./Trophic_level" id="mwDx4" rel="mw:WikiLink" title="Trophic level">trophic level</a></b> of the world <a class="mw-redirect" href="./Fisheries" id="mwDx8" rel="mw:WikiLink" title="Fisheries">fisheries</a> catch has steadily declined because many high trophic level species, such as <a href="./Tuna" id="mwDyA" rel="mw:WikiLink" title="Tuna">tuna</a> <i id="mwDyE">(pictured)</i>, have been <a class="mw-redirect" href="./Overfished" id="mwDyI" rel="mw:WikiLink" title="Overfished">overfished</a>?