Survival of Marbled Teal (Marmaronetta angustirostris)released back into the wild

Reintroduction or re-enforcement programmes are major tools in species conservation, but there is a need for more studies thatassess the influence of different husbandry and release methods on the survival of released animals. We investigated the survival ofglobally threatened Marbled Teal (Marmaronetta angustirostris) taken into captivity as ducklings when they became trapped in anirrigation channel, then released again after fledging. We used wing tags and mark-recapture models to estimate the survival of releasedteal. Ducklings rescued in 1996 (n = 53) were released soon after fledging in September and their survival was modelled forseven months until April 1997. Their apparent monthly survival rate (lower than true survival owing to loss of wing tags) was0.85