G. Aleix-Mata, Jesús M. Pérez, B. Adrados, M. Boos, Evelyn Marty, Pierre Mourieres, Estelle Lauer, Sébastien Zimmermann, Marc Mossoll-Torres, Antonio Sánchez
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Sex Ratio of Alpine and Pyrenean Rock Ptarmigans Lagopus muta Estimated by a Non-Invasive Method (Faecal DNA Analysis) and from Hunting Bag Data
In most unisexual species, the numbers of male and female individuals are approximately equal. The adult sex ratio (ASR) is a key demographic parameter for the conservation and management of wild species. However, in the case of monomorphic birds such as the Rock Ptarmigan Lagopus muta, estimating the sex ratio is difficult. To test if the sex ratio is balanced, we analysed the adult sex ratio of this tetraonid with two different methods, using microsatellite individualisation of non-invasive samples (faeces) and the hunting bag data of birds hunted in the French Alps and Pyrenees. The results of our non-invasive study revealed a balanced ASR in spring, whereas hunted specimens had a strongly male-biased ratio for adults but an approximately balanced sex ratio for juveniles (< 1 year old). The sex ratio estimated from hunting data may be biased for the adult population and, as occurs in other species, is not representative of the overall sex ratio. Our results suggest that, assuming our sampling strategy was adequate, non-invasive sampling is a good method to estimate ASR.—Aleix-Mata, G., Perez, J.M., Adrados, B., Boos, M., Marty, E., Mourieres, P., Lauer, E., Zimmermann, S., Mossoll-Torres, M. & Sanchez, A. (2021). Sex ratio of Alpine and Pyrenean Rock Ptarmigans Lagopus muta estimated by a non-invasive method (faecal DNA analysis) and from hunting bag data. Ardeola, 68: 201-212.
期刊介绍:
Ardeola: International Journal of Ornithology is the scientific journal of SEO/BirdLife, the Spanish Ornithological Society. The journal had a regional focus when it was first published, in 1954. Since then, and particular during the past two decades, the journal has expanded its thematic and geographical scope. It is now a fully international forum for research on all aspects of ornithology. We thus welcome studies within the fields of basic biology, ecology, behaviour, conservation and biogeography, especially those arising from hypothesis-based research. Although we have a long publication history of Mediterranean and Neotropical studies, we accept papers on investigations worldwide.
Each volume of Ardeola has two parts, published annually in January and July. The main body of each issue comprises full-length original articles (Papersand Review articles) and shorter notes on methodology or stimulating findings (Short Communications). The publication language is English, with summaries, figure legends and table captions also in Spanish. Ardeolaalso publishes critical Book Reviewsand PhD-Dissertation Summaries; summarising ornithological theses defended in Spain. Finally there are two Spanish-language sections, Ornithological News; summarising significant recent observations of birds in Spain, and Observations of Rare Birds in Spain, the annual reports of the Spanish Rarities Committee.