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Table 1 Foraging parameters of GPS tracked western gulls from Southeast Farallon Island (SFI) and Año Nuevo Island (ANI)

From: Population-level plasticity in foraging behavior of western gulls (Larus occidentalis)

Gull population Trip type Trips (n) Trip duration (h) Max range (km) Distance traveled (km) % of trip over land
SFI Ocean 90 3.8 ± 3.3a,b 27.1 ± 20.3a 70.7 ± 58.9a 0
Land 41 12.9 ± 7.5a,c 53.4 ± 15.5a,c 150.9 ± 59.3a,c 52.0 ± 22.6c
ANI Ocean 42 2.9 ± 2.7b 20.6 ± 12.1 48.5 ± 31.4 0
Land 103 3.6 ± 2.4c 20.8 ± 9.4c 51.2 ± 31.3c 73.4 ± 27.8c
  1. Shown are means ± SD for trip duration, maximum range (i.e. distance) from breeding colony, total distance traveled, and percentage of trip over land (i.e. % of trip duration). For each population, trips are separated by whether gulls foraged in oceanic waters exclusively or whether they visited locations on land. See Methods for details on statistical treatments of the data
  2. Significant statistical differences (P < 0.05) between trip types (ocean vs land) within a population (a; SFI only) and between populations within a trip type (b & c)