Article Abstract:
Radio-tracking and strip transect techniques for determining foraging range of Black-legged Kittiwakes in Prince William Sound, AK, were compared. Bootstrapping procedures to simulate the effect of decreasing sampling effort on both methods were also applied. Findings showed that radio-tracking provides a more accurate indication of foraging distances compared to strip transect sampling. Previous investigations of seabirds which employed strip transect sampling failed to consider bird spreading or the influences of study-area limitations, thus, underestimating foraging range.
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Article Abstract:
Tufted Puffins chose forage-fish schools near their colony, while Marbled Murrelets selected smaller and more densely populated fish schools in shallower waters. The choice of shallower habitats among murrelets is suggested to be due to their lower maximum diving depths compared to puffins. These were found in a study of the selection of forage-fish schools by the two species in Prince William Sound, AK, using hydroacoustic and bird-observation data gathered from Jul 21 to Aug 11, 1995.
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Article Abstract:
Research concerning the reliance of the Black-legged Kittiwake on supplies of 1-year-old Pacific herring in Prince William Sound, Alaska, is presented. Radio tracking is used to determine foraging range and time data.
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