Contemporary conservation translocations are foundational to Predator-Free aspirations in Aotearoa New Zealand: a review

The biological changes that have occurred in Aotearoa New Zealand following human settlement are well documented with almost all ecosystems and taxa having been negatively impacted. Against this background of loss there have been remarkable advances in conservation management, particularly in the large-scale eradication and control of exotic mammalian pests. In 2016, the New Zealand Government announced Predator Free 2050, an ambitious project to eradicate introduced predators in Aotearoa New Zealand by 2050. Here, we discuss conservation translocations in the context of Predator Free 2050 aspirations. Our review draws together knowledge from Aotearoa New Zealand’s rich history of translocations and outlines a framework to support translocation decision making in the predator-free era. Predator Free 2050 aspirations encompass an ongoing question in conservation management; should we focus on maintaining small protected populations, because this seems generally easier and currently achievable, or on reversing declines in the large mainland areas that contain most of our biodiversity, a much harder challenge largely reliant on the continued use of aerially applied toxins? We focus on successfully establishing small translocated populations because they will provide the source populations for colonisation of a predator-free landscape. We define a successful translocation as one that meets a clear set of fundamental objectives defined a priori. If translocation objectives are clearly defined all subsequent decisions about factors that influence conservation translocation outcomes (e.g. the cultural and social setting, pest thresholds, habitat quality, genetic management) will be easier. Therefore, we encourage careful thinking in formulating conservation translocation objectives that align with aspirations for a predator-free Aotearoa NZ. We discourage a focus on any single element of planning and rather encourage all people involved in conservation translocations, particularly decision makers, to explicitly recognise the multiple values-based objectives associated with conservation translocations.