Sex ratios of Mountain Plovers from egg production to fledging

Avian Conservation and Ecology

Kathryn P. Huyvaert,¹  Paul M. Lukacs,²  Victoria J. Dreitz,²  Margaret M. Riordan,² 

[1] Colorado State University;University of Montana

关键词: Charadrius montanus;    chick survival;    Mountain Plover;    primary sex ratio;    secondary sex ratio;   

DOI  :  10.5751/ACE-00772-100203

学科分类：社会科学、人文和艺术（综合）

来源: Resilience Alliance Publications

【 摘 要 】

Skewed sex ratios can have negative implications for population growth if they do not match a species’ life history. A skewed tertiary sex ratio has been detected in a population of Mountain Plover (Charadrius montanus), a grassland shorebird experiencing population declines. To study the cause of the observed male skew, we examined three early life stages between egg and fledgling in eastern Colorado from 2010 to 2012. This allows us to distinguish between egg production and chick survival as an explanation for the observed skew. We examined the primary sex ratio in eggs produced and the secondary sex ratio in hatched chicks to see if the sex ratio bias occurs before hatching. We also determined the sex ratio at fledging to reveal sex-specific mortality of nestlings. The primary sex ratio was 1.01 (

【 授权许可】

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