Predicting Dynamics of Aggregate Loafing Behavior in Glaucous-Winged Gulls (Larus Glaucescens) at a Washington Colony
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چکیده
منابع مشابه
Plastic consumption and diet of Glaucous-winged Gulls (Larus glaucescens).
We analyzed dietary habits and presence of plastic in 589 boluses of Glaucous-winged Gulls (Larus glaucescens) as one of two studies on the impact of plastics on marine life in the US Salish Sea. Volunteers dissected boluses collected (2007-2010) from Protection Island, Washington. Components were separated into 23 food and non-food categories. Plastic was found in 12.2% of boluses, with plasti...
متن کاملHabitat Patch Occupancy Dynamics of Glaucous-winged Gulls (larus Glaucescens) Ii: a Continuous-time Model
The diurnal distribution and abundance dynamics of loafing Glaucous-winged Gulls (Larus glaucescens) were examined at Protection Island National Wildlife Refuge, Strait of Juan de Fuca, Washington. Asynchronous movement of gulls among three habitat patches dedicated to loafing was modeled as a function of environmental variables using differential equations. Multiple time scale analysis led to ...
متن کاملHabitat Patch Occupancy Dynamics of Glaucous-winged Gulls (larus Glaucescens) I: a Discrete-time Model
Diurnal habitat occupancy dynamics of Glaucous-winged Gulls were evaluated in a system of six habitats on and around Protection Island, Washington. Data were collected on the rates of gull movement between habitat patches, and from these data the probabilities of transitions between habitats were estimated as functions of tide height and time of day. A discrete-time matrix model based on the tr...
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—Energy gain is thought to play a central role in prey selection by most foragers, but it may conflict with food theft avoidance and be constrained by undeveloped foraging skills. We investigated predation by the Glaucous-winged Gull (Larus glaucescens) on the ecologically important Ochre Sea Star (Pisaster ochraceus). We tested the hypothesis that Pisaster size selection by gulls was based on ...
متن کاملEgg Production in a Coastal Seabird, the Glaucous-Winged Gull (Larus glaucescens), Declines during the Last Century
Seabirds integrate information about oceanic ecosystems across time and space, and are considered sensitive indicators of marine conditions. To assess whether hypothesized long-term foodweb changes such as forage fish declines may be reflected in a consumer's life history traits over time, I used meta-regression to evaluate multi-decadal changes in aspects of egg production in the glaucous-wing...
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ژورنال
عنوان ژورنال: The Auk
سال: 2004
ISSN: 1938-4254,0004-8038
DOI: 10.1093/auk/121.2.380