Fig. 4 in Exposure of yellow-legged gulls to Toxoplasma gondii along the Western Mediterranean coasts: Tales from a sentinel

Fig. 4. Biplots of δ13C and δ15N (a) and δ34S and δ15N (b) representing the isotopic variability of yellow-legged gull albumen samples as a response of their immunological status against T. gondii. Isotopic signatures (as a proxy of females' diet) and egg/nest immunological status (as a proxy of females' exposure to the parasite) does not appear to be related. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)