Survival estimation in a long-lived monitor lizard: radio-tracking of Varanus mertensi

Abstract

<jats:title>Abstract</jats:title><jats:p>The population dynamics of varanids (large monitor lizards) is poorly understood. We report on the most detailed study to date of a population of one of Australia's largest semi‐aquatic varanids, <jats:italic>Varanus mertensi</jats:italic>. Survival of <jats:italic>V. mertensi</jats:italic> was derived from known‐fate modelling of radio‐tracked individuals over two and a half years. We demonstrate empirically what intuition suggests; that apparent survival probability in long‐lived lizards is high over short sampling periods, with body size and gender influencing these estimates. Survival estimation in long‐lived species such as varanids clearly requires long‐term studies.</jats:p>