Geoffroy saguzarraren dieta Euskal Herrian
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Geoffroy saguzarrak eguneko euliak eta armiarmak ditu gustuko, baina harrapakin talde bakoitzaren garrantzia eremu geografikoarekin aldatzen da. Lan honetan, Euskal Herriko eta inguruetako hamaika kolonia aukeratu ditugu, eta “DNA Metabarcoding” teknikaren bidez haien dieta aztertu dugu bi garai ezberdinetan, dietan aldakortasun tenporal eta espaziala aztertzeko. Oro har, armiarma eta euli ugariko dieta aurkezten dute ikertutako koloniek. Koloniaren inguruko paisaiaren ezaugarriek eragin handiago dute dietan uztailean, eta abeltzaintza aktibitatea altuagoa den eremuetan dipteroen, zehazki Stomoxys calcitrans euliaren, kontsumo handiagoa topatu dugu. Beraz, Euskal Herrian Geoffroy saguzarraren kontserbaziorako ezinbestekoa da bi harrapakin mota hauen eskuragarritasuna bermatzea.
The notch-eared bat is fond of diurnal flies and spiders, but the importance of each prey type varies according to geographic location. In this study, we chose eleven colonies in the Basque Country and its surroundings, and we analyzed their diet using DNA metabarcoding throughout the whole maternity season, with the aim of studying the spatio-temporal variability of the diet. Overall, the notch-eared bat presents a diet rich in both spiders and diurnal flies in the colonies studied. In July, a greater consumption of the fly Stomoxys calcitrans can be expected in the colonies where livestock farming is more important. This indicates that ensuring availability of these two types of prey species is essential for the conservation of the notch-eared bat in the Basque Country.
The notch-eared bat is fond of diurnal flies and spiders, but the importance of each prey type varies according to geographic location. In this study, we chose eleven colonies in the Basque Country and its surroundings, and we analyzed their diet using DNA metabarcoding throughout the whole maternity season, with the aim of studying the spatio-temporal variability of the diet. Overall, the notch-eared bat presents a diet rich in both spiders and diurnal flies in the colonies studied. In July, a greater consumption of the fly Stomoxys calcitrans can be expected in the colonies where livestock farming is more important. This indicates that ensuring availability of these two types of prey species is essential for the conservation of the notch-eared bat in the Basque Country.
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Myotis emarginatus, dieta tenporala, euliak, armiarmak, DNA Metabarcoding., Myotis emarginatus, seasonal diet, prey, flies, spiders, DNA Metabarcoding