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Breeding biology of a relictual Maghreb Magpie(Pica mauritanica)population in Tunisia

Avian Research 2021年第1期12卷 28-36页

作者： Aymen Nefla Ridha Ouni Slaheddine Selmi Said Nouira Department of Biology Faculty of Sciences of TunisUniversity of Tunis El ManarEl Manar II2092 TunisTunisia Tunisia Wildlife Conservation Society BejaouaSidi Thabit TunisTunisia Research Unit“Ecology of Terrestrial Fauna”(UR17ES44) Faculty of SciencesUniversity of GabesZrig6072 GabesTunisia

Background:The Maghreb Magpie(Pica mauritanica)is an endemic North African *** knowledge on this species is limited to historic descriptive data with no ecological information *** continue to dramatically decline in Tunisia,where only one relic population *** the breeding biology of this species is essential for conservation *** purpose of this study was to increase our understanding of the Tunisian relic population and provide detailed data on breeding biology over two breeding seasons(2017 and 2018).Methods:This study occurred on a private farm of 650 ha,located 10 km from Dhorbania village at Kairouan Governorate,in central *** nests were monitored weekly during egg laying period and twice a week during hatching *** Ivlev's electivity index was used to assess whether the frequency of use of nesting trees and bushes matched their availability in the study *** recorded nest measurements and positions,and compared them using Wilcoxon signed-rank *** of breeding parameters as number of eggs laid,hatchlings,and fledglings over years were performed using Mann–Whitney U-test andχ^(2) *** used a Generalized Linear Mixed Model(GLMM)to investigate how egg volume varied with clutch size and laying ***:We investigated clutch size,egg size,hatching and fledging success,and evaluated how these parameters varied according to laying date and nest *** size averaged 5.00±0.19 but was significantly greater *** of nest failure included the depredation of nestlings by shrikes,cobras and rats(*** meridionalis,Naja haje and Rattus rattus),death of parents by the Black-shouldered Kite(Elanus caeruleus)and nest parasitism by the Great Spotted Cuckoo(Clamator glandarius).Clutch size,brood size and fledgling success were unaffected by laying date,nest volume and nest *** volume decreased with laying date but was unaffected by ***

关键词： Clutch size Laying date Maghreb Magpie Nesting habitat Nest success relic population Tunisia

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