This gull species thrives on human practices of waste fish dumping. The population of Audouin's gull has risen spectacularly since the fishing industry, particularly in the Ebro delta of Spain, began dumping large volumes of fish waste overboard. Having adapted to this food source, Audouin's gull populations would now be decimated should the fishing industry choose to use the fish waste as animal food (9). In periods when the fisheries do not operate, Audouin's gulls have been seen to suffer food shortages, as well as becoming prey for the yellow-legged gull (Larus michahellis) (10). Audouin's gull is also threatened by tourism, which causes both increased coastal development and increased disturbance during the breeding season (8). Bird-watching and research activities have also been known to negatively impact on Audouin's gull (9). Predation by the red fox and the domestic dog, as well as by other gulls and peregrine falcons is increasing, but is only a minor threat (8).
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