Why Does So Much of Nature Rely on Sex for Reproduction? (image) Wiley Share Print E-Mail Caption This is a photo of the lake that is home to the population of snails that the researchers studied. Lake Alexandrina is a natural lake and waterfowl preserve in the Mackenzie Basin of New Zealand's South Island. Credit Evolution Letters Usage Restrictions None Share Print E-Mail 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.