干旱区生态环境知识资源中心(Arid): Predation of young tortoises by ravens: the effect of habitat structure on tortoise detectability and abundance

Arid

DOI	10.1038/s41598-020-58851-5
	Predation of young tortoises by ravens: the effect of habitat structure on tortoise detectability and abundance
	Segura, Amalia 1; Jimenez, Jose 1; Acevedo, Pelayo 1,2
通讯作者	Segura, Amalia
来源期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
出版年	2020
卷号	10 期号:1
英文摘要	The predation of young tortoise is considered a major cause of mortality for many tortoise species. The predation by common ravens has been identified as being responsible for significant decreases in tortoise populations. Mediterranean spur-thighed tortoise hatchlings and juveniles in Maamora forest (Morocco) were studied in order to describe the size/age class predation of common ravens on young tortoises and infer the drivers of predation risk and population abundance. The results showed a high level of predation on young tortoises (<75mm carapace length) attributed to ravens in areas with low vegetation cover, representing 100% of the cases of mortality (n=147), but it was moderate in covered areas (n=19), representing 12-27%. The population structure of living juveniles differed significantly between covered and uncovered areas, thus suggesting that raven predation might modify juvenile population structure. Finally, N-mixture models showed a positive relationship between (i) bare cover and tortoise detectability that is only evidenced when the plot is far from a perch and (ii) population abundance and shrub species-richness, being higher in uncovered areas. Our results improve the knowledge on predation and survival on this critical stage in life, which is crucial for the conservation of the Mediterranean spur-thighed tortoise.
类型	Article
语种	英语
国家	Spain
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000515598400025
WOS关键词	JUVENILE DESERT TORTOISES ; TESTUDO-GRAECA ; GOPHERUS-AGASSIZII ; POPULATION ; SURVIVAL ; RISK ; DEMOGRAPHY ; MORTALITY ; MODELS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315557
作者单位	1.IREC CSIC UCLM JCCM, Inst Invest Recursos Cineget, Ronda Toledo 12, Ciudad Real 13071, Spain; 2.Escuela Tecn Super Ingenieros Agr UCLM, Ronda Calatrava 7, Ciudad Real 13071, Spain
推荐引用方式 GB/T 7714	Segura, Amalia,Jimenez, Jose,Acevedo, Pelayo. Predation of young tortoises by ravens: the effect of habitat structure on tortoise detectability and abundance[J],2020,10(1).
APA	Segura, Amalia,Jimenez, Jose,&Acevedo, Pelayo.(2020).Predation of young tortoises by ravens: the effect of habitat structure on tortoise detectability and abundance.SCIENTIFIC REPORTS,10(1).
MLA	Segura, Amalia,et al."Predation of young tortoises by ravens: the effect of habitat structure on tortoise detectability and abundance".SCIENTIFIC REPORTS 10.1(2020).