An a priori assessment of the impact of harvesting from five wild populations for conservation translocations

Author:

Mitchell William F.12ORCID,Nance Alexandra H.13ORCID,Clarke Rohan H.1ORCID

Affiliation:

1. School of Biological Sciences Monash University Clayton Victoria 3800 Australia

2. BirdLife Australia 2‐05/60 Leicester St Carlton Victoria 3053 Australia

3. Parks Australia, Norfolk Island National Park and Botanic Garden PO Box 310 Norfolk Island New South Wales 2899 Australia

Abstract

Given the frequency with which translocation is implemented as a conservation tool, remarkably little research has assessed the sustainable management of translocation source populations. We sought to make an a priori estimate of the impact of multiple alternative harvesting scenarios on five passerine species endemic to Norfolk Island which may benefit from future translocation. Population parameters for our five focal taxa were quantified using distance sampling at 298 point surveys conducted in 2019. Intensive nest monitoring between 2018 and 2020 was used to estimate reproductive rates. We modelled population trajectories for all five taxa under alternative harvesting scenarios in forward projections over a 25‐year period to assess the likelihood that focal populations could recover from a harvesting event. We used sensitivity analysis to assess the robustness of models to uncertainty around some population parameters. We estimate that Norfolk Island National Park supported 1486 Norfolk Robins Petroica multicolor (95% confidence interval (CI) 1017–1954), 7184 Slender‐billed White‐eyes Zosterops tenuirostris (95% CI 5817–8551), 2970 Norfolk Grey Fantails Rhipidura albiscapa pelzini (95% CI 2094–3846), 3676 Norfolk Gerygones Gerygone modesta (95% CI 2869–4482) and 1671 Norfolk Golden Whistlers Pachycephala pectoralis xanthoprocta (95% CI 1084–2259) in 2019. All five species were predicted to recover from the harvest of 50, 100 or 150 individuals within 10 years. Despite considerable variation in population parameters, we demonstrate that all five focal taxa have the potential to sustain harvesting at rates required for future conservation translocations. We provide a clear comparison of differing intensity harvesting strategies for on‐ground managers. More broadly, we provide a rare example of an a priori assessment of the impact of harvesting for translocation.

Funder

Australia and Pacific Science Foundation

Publisher

Wiley

Reference77 articles.

1. Estimating the strength of density dependence in the presence of observation errors using integrated population models

2. Modelling Reintroduced Populations: The State of the Art and Future Directions

3. Density-dependent population growth in a reintroduced population of North Island saddlebacks

4. Population viability management: ecological standards to guide adaptive management for rare species

5. Baylis S.M.2017.Planting the Seeds of a Tree of Death: A New Approach Supporting Information Test Cases and a National‐Scale Study of Population Mortality Structures from Animal‐Marking Records. Doctor of Philosophy thesis Monash University.

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3