Assessing nest attentiveness of Common Terns via video cameras and temperature loggers  

作　　者：Jeffery D.Sullivan Paul R.Marbán Jennifer M.Mullinax David F.Brinker Peter C.McGowan Carl R.Callahan Diann J.Prosser 

机构地区：[1]Natural Systems Analysts,Winter Park,FL 32789,USA [2]Marine,Estuarine,and Environmental Sciences Program,University of Maryland,College Park,MD 20742,USA [3]Department of Environmental Science and Technology,University of Maryland,1443 Animal Sciences Bldg,College Park,MD 20742,USA [4]Department of Natural Resources,Maryland Natural Heritage Program,Annapolis,MD 21401,USA [5]Chesapeake Bay Field Office,U.S.Fish and Wildlife Service,Annapolis,MD 21401,USA [6]U.S.Geological Survey,Patuxent Wildlife Research Center,Laurel,MD 20708,USA.

出　　处：《Avian Research》2020年第3期284-301,共18页鸟类学研究（英文版）

基　　金：This work was supported by the U.S.Army Corps of Engineers(Baltimore District),U.S.Geological Survey(Patuxent Wildlife Research Center);the University of Maryland,the Maryland Department of Natural Resources(Wildlife and Heritage Program);the Maryland Environmental Service,and the Maryland Coastal Bays Program.

摘　　要：Background:While nest attentiveness plays a critical role in the reproductive success of avian species,nest attentiveness data with high temporal resolution is not available for many species.However,improvements in both video monitoring and temperature logging devices present an opportunity to increase our understanding of this aspect of avian behavior.Methods:To investigate nest attentiveness behaviors and evaluate these technologies,we monitored 13 nests across two Common Tern(Sterna hirundo)breeding colonies with a paired video camera-temperature logger approach,while monitoring 63 additional nests with temperature loggers alone.Observations occurred from May to August of 2017 on Poplar(Chesapeake Bay,Maryland,USA)and Skimmer Islands(Isle of Wight Bay,Maryland,USA).We examined data respective to four times of day:Morning(civil dawn‒11:59),Peak(12:00‒16:00),Cooling(16:01‒civil dusk),and Night(civil dusk‒civil dawn).Results:While successful nests had mostly short duration off-bouts and maintained consistent nest attentiveness throughout the day,failed nests had dramatic reductions in nest attentiveness during the Cooling and Night periods(p<0.05)with one colony experiencing repeated nocturnal abandonment due to predation pressure from a Great Horned Owl(Bubo virginianus).Incubation appeared to ameliorate ambient temperatures during Night,as nests were significantly warmer during Night when birds were on versus off the nest(p<0.05).Meanwhile,off-bouts during the Peak period occurred during higher ambient temperatures,perhaps due to adults leaving the nest during the hottest periods to perform belly soaking.Unfortunately,temperature logger data alone had limited ability to predict nest attentiveness status during shorter bouts,with results highly dependent on time of day and bout duration.While our methods did not affect hatching success(p>0.05),video-monitored nests did have significantly lower clutch sizes(p<0.05).Conclusions:The paired use of iButtons and video cameras enabled a detailed description of

关 键 词：Common Tern IBUTTON Nest attentiveness Sterna hirundo Temperature logger Video monitoring 

分 类 号：Q958[生物学—动物学]