Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where D.J. Crookes is active.

Publication


Featured researches published by D.J. Crookes.


Development Southern Africa | 2003

The Contribution of Livelihood Activities in the Limpopo Province: Case Study Evidence From Makua and Manganeng

D.J. Crookes

This article uses case study evidence from Makua and Manganeng, two rural villages in the Capricorn region, to investigate the effects of private and social costs, such as land degradation, on rural livelihoods in the area. Information is derived from household surveys, key informant interviews, participatory appraisal techniques, and a detailed ecological baseline study of the area. Livelihood activities such as agricultural practices (crop and livestock production), and wood and edible product gathering are included. This article attempts to synthesise the information gathered and lessons learnt from these studies, quantifies the contribution of these livelihood activities in monetary terms, and considers the implications for sustainable livelihood practices. The study finds that non-cash earnings contribute an important component of overall household income - between 40 and 50 per cent before social and opportunity costs are deducted. However, external costs significantly undermine overall earnings from natural resource-based products.


Development Southern Africa | 2016

A Categorisation and Evaluation of Rhino Management Policies

D.J. Crookes; James Nelson Blignaut

ABSTRACT Rhino populations are at a critical level and new approaches are needed to ensure their survival. This study conducts a review and categorisation of policies for the management of rhinos. Twenty-seven policies are identified and classified into in-situ (reserve-based) and ex-situ (market-based) policies. The policies are then evaluated based on four target areas: poachers/hunters, consumers, intermediaries and the game reserves themselves. The study finds that protected area management policies seem most beneficial in the short run, in particular the enforcement of private property rights over resource utilisation, as well as the establishment of wildlife sanctuaries that act as sustainable breeding grounds for rhino populations.


Journal for Nature Conservation | 2015

Debunking the myth that a legal trade will solve the rhino horn crisis: A system dynamics model for market demand

D.J. Crookes; James Nelson Blignaut


South African Journal of Science | 2016

Trading on extinction : an open-access deterrence model for the South African abalone fishery

D.J. Crookes


South African Journal of Economic and Management Sciences | 2016

Predator–prey analysis using system dynamics: An application to the steel industry

D.J. Crookes; James Nelson Blignaut


Journal for Nature Conservation | 2017

Does a reduction in the price of rhino horn prevent poaching

D.J. Crookes


Water Resources and Economics | 2018

The impact of human behaviour and restoration on the economic lifespan of the proposed Ntabelanga and Laleni dams, South Africa: A system dynamics approach

Rozanne Bester; James Nelson Blignaut; D.J. Crookes


Archive | 2017

Financing active restoration in South Africa : an evaluation of different institutional models

Thulile Vundla; James Nelson Blignaut; D.J. Crookes


Archive | 2017

Aquatic weeds : to control or not to control. the case of the Midmar Dam, KwaZulu-Natal, South Africa

Thulile Vundla; James Nelson Blignaut; D.J. Crookes


Archive | 2017

An economic analysis of different land-use options to assist in the control of the invasive Prosopis (Mesquite) tree

Sheperd Mudavanhu; James Nelson Blignaut; N. Vink; D.J. Crookes; Nonophile Nkambule

Collaboration


Dive into the D.J. Crookes's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge