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Aims. We aim to investigate the stellar population properties, ages, andmetal content of the globular clusters (GCs) in NGC 3311, the central galaxy ofthe Hydra I cluster, to better constrain its evolution history. Methods. Weused integral-field spectroscopic data from the Multi-Unit SpectroscopicExplorer (MUSE) to identify 680 sources in the central region of NGC 3311 andextract their 1D spectra. An analysis of these sources in terms ofmorphologies, radial velocities, and emission lines allowed us to narrow downour selection to 49 bona fide GC candidates. We split these candidates into twogroups depending on their projected distance to the galaxy center (R), namelyinner (R<20arcsec) and outer (R>20arcsec) GCs. We stacked the extracted 1Dspectra of the inner and outer GC populations to increase the signal-to-noiseratios (S/Ns) of the resulting spectra and hence allow full-spectrum fitting.In addition, we also created a stacked spectrum of all GCs in NGC 3311 and oneof the two most central GC candidates. Using the code pPXF, we performed astellar population analysis on the four stacked 1D spectra, obtainingmass-weighted integrated ages, metallicities, and [$\alpha$/Fe] abundances.Results. All GCs are old, with ages >13.5 Gyr, and they have super-solarmetallicities. Looking at the color distribution, we find that the inner onestend to be redder and more metal rich than the outer ones. This is consistentwith the two-phase formation scenario. Looking at the full-spectral fittingresults, at face value the outer GCs have a larger [$\alpha$/Fe] ratio, whichis in line with what is found for the stars that dominate the surfacebrightness profile at the same radii. However, the values for outer and innerGCs are consistent within the uncertainties.

Ages, metallicity, and alpha-enhancement of the globular cluster populations in NGC 3311