Abstract

There is a dearth of information on empirical studies on the impact of fish biodiversity on the welfare of farmers. Hence, it is important to investigate the role fish biodiversity, as a risk management measure, plays in the welfare status of aquaculture farmers in Ondo State, Nigeria. A multistage sampling procedure was employed in picking 192 respondents. Data were analyzed using the marginal treatment effects (MTE) approach to estimate treatment effect heterogeneity and policy-relevant treatment effects (PRTE) to simulate the effect of policy change. The empirical findings show that there is a huge heterogeneity in the gains from the adoption of fish biodiversity as a risk management measure concerning observed and unobserved factors. The results indicate that fish biodiversity adoption significantly increases revenue and reduces the poverty level of fish farming households at the reduced level of unobserved resistance to adoption. Also, PRTE results reveal that adoption rates of fish biodiversity could be significantly raised through the enhancement of fish biodiversity training and access to fish biodiversity information sources. Therefore, adoption of fish biodiversity as a risk management measure should be the priority of policymakers whose focus is on how to improve farm revenue and reduce poverty among aquaculture farmers.

摘要

关于鱼类生物多样性对农民福利影响的实证研究信息匮乏。因此，研究鱼类生物多样性作为一种风险管理措施对尼日利亚翁多州水产养殖户的福利状况所发挥的作用非常重要。采用多阶段抽样程序挑选了 192 名受访者。使用边际治疗效应（MTE）方法分析数据以估计治疗效果异质性，并使用政策相关治疗效应（PRTE）来模拟政策变化的效果。实证结果表明，采用鱼类生物多样性作为涉及观察到和未观察到的因素的风险管理措施所带来的收益存在巨大的异质性。结果表明，鱼类生物多样性的采用显着增加了收入，并降低了养鱼家庭的贫困水平，同时降低了未观察到的对采用的阻力。此外，PRTE 结果表明，通过加强鱼类生物多样性培训和获取鱼类生物多样性信息源，可以显着提高鱼类生物多样性的采用率。因此，采用鱼类生物多样性作为风险管理措施应成为政策制定者的优先事项，其重点是如何提高农业收入和减少水产养殖农民的贫困。PRTE 结果表明，通过加强鱼类生物多样性培训和获取鱼类生物多样性信息源，可以显着提高鱼类生物多样性的采用率。因此，采用鱼类生物多样性作为风险管理措施应成为政策制定者的优先事项，其重点是如何提高农业收入和减少水产养殖农民的贫困。PRTE 结果表明，通过加强鱼类生物多样性培训和获取鱼类生物多样性信息源，可以显着提高鱼类生物多样性的采用率。因此，采用鱼类生物多样性作为风险管理措施应成为政策制定者的优先事项，其重点是如何提高农业收入和减少水产养殖农民的贫困。