δ<sup>13</sup>C and δ<sup>15</sup>N isotope profiles over time in vibrissae from adult female California sea lions from San Esteban Island, Gulf of California.

<p>δ<sup>13</sup>C and δ<sup>15</sup>N isotope profiles over time in vibrissae from adult female California sea lions from San Esteban Island, Gulf of California.</p>