For the first time ever, researchers successfully put a fish species on contraception. Dutch biologist Max Janse and vet Henk Luten of Burgers' Zoo implanted a straw full of hormones into an extremely fertile eagle ray, after which she stopped producing offspring. Two years later the researchers published their results this week, NOS reports.
For the first time, it has been proven that eagle rays can be born through asexual reproduction. The Koninklijke Burgers' Zoo in Arnhem has confirmed this on the basis of scientific genetic research on its collection of eagle rays, De Weekkrant reports.