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1 April 2016 Population Trends in Herring Gulls (Larus argentatus), Great Black-Backed Gulls (Larus marinus) and Lesser Black-Backed Gulls (Larus fuscus fuscus) in Finland
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Abstract

After an increase from the 1930s through the mid-1990s, the populations of the Herring Gull (Larus argentatus), the Lesser Black-backed Gull (L. fuscus fuscus), and the Great Black-backed Gull (L. marinus) in Finland are currently declining at rates of 0.5%, 2.7%, and 1.5% per annum, respectively. Although now declining in numbers, the Herring Gull is still the dominant gull species on Finnish coasts. The nominate Lesser Black-backed Gull, formerly the most abundant large gull in the Baltic Sea, is now considered endangered over its entire range. The Great Black-backed Gull has largely followed the trajectories of the other two species, but in much lower numbers. The decline of the Lesser Black-backed Gull may have been caused by severe reproductive failures due to pollutants and predation, while the factors behind the declines of the other two species are largely unknown.

Martti Hario and Jukka Rintala "Population Trends in Herring Gulls (Larus argentatus), Great Black-Backed Gulls (Larus marinus) and Lesser Black-Backed Gulls (Larus fuscus fuscus) in Finland," Waterbirds 39(sp1), 10-14, (1 April 2016). https://doi.org/10.1675/063.039.sp107
Received: 16 May 2014; Accepted: 1 July 2015; Published: 1 April 2016
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