Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Allemagne → 2019 → Foraging Ecology, Genetic Diversity and Spatial Behaviour of Caucasian Lynx in Anatolia

Freie Universität Berlin (2019)

Foraging Ecology, Genetic Diversity and Spatial Behaviour of Caucasian Lynx in Anatolia

Mengüllüoğlu, Deniz

Titre : Foraging Ecology, Genetic Diversity and Spatial Behaviour of Caucasian Lynx in Anatolia

Auteur : Mengüllüoğlu, Deniz

Université de soutenance : Freie Universität Berlin

Grade : Dr. rer. nat. 2019

Résumé
Baseline ecological, genetic and behavioural information is still lacking and is urgently needed to set up an efficient conservation action plan for Caucasian lynx Lynx lynx dinniki in Turkey. This dissertation investigated the diet and foraging ecology of the three largest Caucasian lynx populations occupying three major lynx habitat types in Anatolia, the Asian part of Turkey. I also studied the spatial organisation and genetic variation as well as interactions between individuals of Caucasian lynx in a study area in northwestern Anatolia where I benefitted from long-term monitoring efforts started in 2009. In Chapter 2, I quantified the diet, prey preferences and functional response of three Caucasian lynx populations in Anatolia from a comparative perspective of European Eurasian lynx populations. The diet of the Eurasian lynx in Anatolia consists mostly of brown hares Lepus europaeus (78 % - 99 % of prey biomass consumed). Its foraging ecology fulfils expectations for a lagomorph specialist, similar to Iberian lynx Lynx pardinus and Canadian lynx Lynx canadensis in other ecosystems. Caucasian lynx in Anatolia display comparable body sizes and physiological requirements to individuals of other lagomorph specialist lynx species and consume half the daily food required to sustain a European Eurasian lynx individual. There was a high incidence of cannibalism, an aggressive behaviour that has very rarely observed in low density European lynx populations, observed in two ecosystems in Anatolia. In Chapter 3, I used nuclear molecular markers to investigate how sampling methodology can affect measures of genetic diversity if the population contains male territorial residents, other male residents and females are philopatric. I contrasted ‘invasive’ sampling, where tissue samples are obtained from individuals caught in box traps, with ‘non-invasive’ sampling, which requires the search and collection of faecal samples (in my case optimised through the training and use of a domestic dog trained to find lynx faeces) and the use of camera trapping. The results demonstrated that ‘invasive’ sampling was an inefficient technique and biased in favour of sampling particular territorial individuals and their offspring, thereby underestimating the true genetic variation in the population. ‘Non-invasive’ faecal sampling resulted in a less biased sampling of all sexes and classes of residents, an improved estimate of genetic diversity measures and a significantly higher level of genetic diversity obtained

Mots clés  : Lynx lynx dinniki prey preferences functional response population genetics spatial organisation home range spatial capture-recapture Turkey

Présentation

Page publiée le 13 janvier 2021