California sea lion (IMAGE) University of California - Santa Cruz Caption Different reproductive strategies can lead to differences in the resilience of a species to disturbance by human activities. The California sea lion is an “income breeder”--to acquire energy for lactation, the female has to leave her pup on the beach and go to sea repeatedly to feed. Credit Photo by Dan Costa Usage Restrictions For use only with news coverage of this research License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.