Survival Rates of Black-Tailed Godwits Limosa limosa Breeding in the Netherlands Estimated from Ring Recoveries

Ardea

Arie J. van Noordwijk¹  David L. Thomson² 

[1] 1 Animal Population Biology, Netherlands Institute of Ecology, Boterhoeksestraat 48, 6666 GA Heteren, The Netherlands;1 Animal Population Biology, Netherlands Institute of Ecology, Boterhoeksestraat 48, 6666 GA Heteren, The Netherlands2 Dutch Centre for Avian Migration & Demography, Netherlands Institute of Ecology, Boterhoeksestraat 48, 6666 GA Heteren, The Netherlands3 current address: Max Planck Institute for Demographic Research, Konrad-Zuse-Straße 1, 18057 Rostock, Germany

关键词: Hunting;   

DOI  :  

学科分类：动物科学

来源: Nederlandse Ornithologische Unie/Netherlands Ornithological Union

【 摘 要 】

TheNetherlandsholdsinternationallyimportantnumbersofBlack-tailedGodwitsLimosalimosa,andreportsofasubstantialpopulationdeclinehavepromptedconcern.Onewayofnarrowingthelistofpossiblecausesofthisdeclineistoidentifythedemographicprocessesresponsible.Forthisreason,weconductedasurvivalanalysisfortheperiod1960to2000basedondeadrecoveriesofgodwits.Althoughdecliningsamplesizesandfallingreportingratesreducedtheprecisionofestimatesinlateryears,weconcludedthatadultsurvivalhaddroppedsignificantlyinthelate1990sfrom0.77to0.40.Dataweretoosparsetoestimatejuvenilesurvivalinthisperiod.Apartfromthissharpdrop,wefoundnoevidenceoflong-termtrendsineitherfirst-yearoradultsurvival.Wefoundnoevidenceforeffectsonsurvivalestimatesofshiftsinthespatialdistributionofrecoveriesorinthereportedcausesofdeath.Theselarge-scaleanalysesofbirdsrecovereddeadcomplementmoreintensivemark-resightingstudiesatindividualsites.Giventhefallingreportingratesofdeadbirdsandconsequentlossofprecisionofsurvivalestimates,intensivemark-resightingprogrammeshaveanincreasinglyimportantroletoplayinthestudyofsurvivalrates.

【 授权许可】

Unknown