Ardea | |
Colony Attendance Patterns by Mated Forster's Terns Sterna forsteri Using an Automated Data-Logging Receiver System | |
Jill D. Bluso-Demers3  Joshua T. Ackerman2  John Y. Takekawa1  | |
[1] 2 U.S. Geological Survey, Western Ecological Research Center, San Francisco Bay Estuary Field Station, 505 Azuar Drive, Vallejo, CA 94592, USA;1 U.S. Geological Survey, Western Ecological Research Center, Davis Field Station, One Shields Avenue, University of California, Davis, CA 95616, USA;1 U.S. Geological Survey, Western Ecological Research Center, Davis Field Station, One Shields Avenue, University of California, Davis, CA 95616, USA3 current address: San Francisco Bay Bird Observatory, 524 Valley Way, Milpitas, CA 95035, USA | |
关键词: San Francisco Bay; | |
DOI : | |
学科分类:动物科学 | |
来源: Nederlandse Ornithologische Unie/Netherlands Ornithological Union | |
【 摘 要 】
Inordertoexamine24-hourcolonyattendancepatternsbymatedForster'sTernsSternaforsteriinSouthSanFranciscoBay,California,duringincubationandchick-rearingstages,weradio-marked10individualsconsistingoffivepairsandrecordedcolonyattendanceusinganautomateddata-loggingreceiversystem.Wecalculatedandanalyzedfivevariables:thetotalattendancetimebypairsandindividuals,thedurationofindividualattendancebouts,andthedurationbothmembersofapaireitheroverlappedincolonyattendanceorwerebothabsentfromthecolony.Thepercentageoftimespentonthecolonybyatleastoneindividualofapairwashighestduringincubationanddeclinedduringchickrearing.Overall,maleternsspentagreaterproportionoftimediurnallyattendingthecolonythanfemales.Femalesspentagreaterproportionoftimeoncolonyatnight,andwithoutthesenocturnalrecords,wewouldhavereportedoverallfemalecolonyattendanceratesasbeingmuchlower.Despitesex-specificdifferencesinattendancerates,thelengthofattendanceboutsdidnotdifferbetweenthesexes.Simultaneouscolonyattendancebybothmembersofapairwashighatnight,butduringtheday,pairsinfrequentlyoverlappedintheircolonyattendanceandbothmemberswerefrequentlyabsent.Ourdataloggingsystemfunctionedwell,andourdataillustratestheimportanceofcollecting24-hourrecordswhenconsideringattendancerates.
【 授权许可】
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【 预 览 】
Files | Size | Format | View |
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RO201912090719554ZK.pdf | 77KB | download |