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Drivers of nest survival rate in a southern Tunisian population of Laughing Doves(Spilopelia senegalensis)

Avian Research 2019年第4期10卷 453-458页

作者： Jihen Boukhriss Slaheddine Selmi Unité de recherche "Ecologie de la Faune Terrestre" (UR17ES44) Faculté des Sciences de Gabès Université de Gabès

Background:Investigating the ecological factors and processes shaping nest survival is of great importance for assessing the breeding success of bird populations and understanding their spatio-temporal ***,this question is addressed for the Laughing Dove(Spilopelia senegalensis),an expanding Afro-tropical bird in the Tunisian oasis ***:This study took place in Kettana oasis,in south-eastern *** Laughing Dove nests were searched for and monitored by means of regular visits,from the discovery date until the end of the breeding attempt(*** or failure).Data were then used to investigate the relevance of laying date,nest age(days after clutch initiation),nest height and vegetation structure in the close nest tree environment as predictors of daily nest survival rate,using logistic-exposure models that accounted for heterogeneity in monitoring period among the studied *** including different combinations of covariates were ranked according to their AICc scores,and the modelaveraging technique was used for the assessment of the effects of covariates on daily nest survival ***:Vegetation structure in the close nest tree environment and nest age provided important predictors of daily nest survival rate,whereas neither nest height nor laying date showed significant *** nest survival rate was negatively associated with the presence of date palm trees in the close nest tree environment,but it was positively related to nest *** nest survival rate was higher during the post-hatching stage than during the pre-hatching ***:nests placed on fruit trees close to clumps of palm trees suffered higher predation risks compared to those placed on fruit trees situated far from palm *** is probably because palm tree clumps provided refuges for nest predators,notably the Black Rat(Rattus rattus)which has been reported to be the main nest predator in the oasis *** predatory activity of thi

关键词： Laughing Dove Laying date nest age nest microhabitat nest survival Oasis Tunisia

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