Modelled effects of prawn aquaculture on poverty alleviation and schistosomiasis control

Hoover, Christopher M.; Sokolow, Susanne H.; Kemp, Jonas; Sanchirico, James N.; Lund, Andrea J.; Jones, Isabel J.; T, Higginson; Riveau, Gilles; Savaya, Amit; Coyle, Shawn D.; Wood, Chelsea L.; Micheli, Fiorenza; Casagrandi, Renato; Mari, Lorenzo; Gatto, Marino; Rinaldo, Andrea; Perez-Saez, Javier; Rohr, Jason R.; Sagi, Amir; Remais, Justin V.; Leo, Giulio A. De

doi:10.1038/s41893-019-0301-7

Cited by 34 publications

(29 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our model results contrast other simulations of predatory biocontrol of schistosomes (Sokolow et al 2015;Hoover et al 2019) that predict consistent success with increasing predator stocking density. Despite several differences between our individual-based model and these ordinary differential equation (ODE) models, one central difference drives these divergent forecasts: the positive effect of resource uptake on schistosome production by individual infected snails.…”

Section: Discussioncontrasting

confidence: 92%

When should we expect predator biocontrol of human schistosomes to backfire?

Malishev¹,

Civitello²

2020

Preprint

View full text Add to dashboard Cite

Conventional wisdom suggests any effort to control pests and parasites is better than none. However, growing evidence demonstrates weak or moderate effort can backfire, fail, and potentially worsen outcomes versus doing nothing. A central challenge is anticipating these potential failures before inducing environmental damage. We built a resource-explicit individual-based model of human schistosome and snail host transmission to evaluate biocontrol effort by simulating 22 predator stocking densities of native prawns. We test two host mortality scenarios and show intense biocontrol effort can succeed. However, weak to moderate effort can backfire by allowing large, prolific hosts to escape predation and drive overcompensation due to three interacting ecological mechanisms-resource competition among hosts, resource-dependent infectiousness, and predator gape limits. Ultimately, integrating physiology, ecology, and epidemiology can identify the risks of weak or moderate control effort when evaluating potential 'do or do not' control designs for future management of wildlife pests and diseases.

show abstract

Section: Discussioncontrasting

confidence: 92%

When should we expect predator biocontrol of human schistosomes to backfire?

Malishev¹,

Civitello²

2020

Preprint

View full text Add to dashboard Cite

show abstract

“…For example, several agrochemicals seem to increase the risk of human schistosomiasis and agriculturally derived zoonotic pathogens, and thus researchers are actively attempting to identify agrochemicals that might 'kill two birds with one stone' , reducing crop pests and thus increasing food production while not increasing or even decreasing human pathogens [137][138][139] . Similarly, researchers are beginning to consider the introduction of prawns as biological control agents of schistosomiasis, which could simultaneously decrease disease and increase nutrition -because restored prawns can be fished, harvested and consumed without compromising their diseasecontrolling benefits 61,140 . We believe that more resourceful and creative thinking and interdisciplinary interactions (among medicine, public health, agriculture professionals, economists, anthropologists, sociologists, modellers, empiricists and wildlife biologists, in the developed and developing world) have great promise for sustainably and simultaneously improving human nutrition while controlling infectious diseases.…”

Section: Box 1 | Modelling Tools For Quantitative Analysis Of Agriculmentioning

confidence: 99%

Emerging human infectious diseases and the links to global food production

et al. 2019

Self Cite

View full text Add to dashboard Cite

Infectious diseases are emerging globally at an unprecedented rate while global food demand is projected to increase sharply by 2100. Here, we synthesize the pathways by which projected agricultural expansion and intensification will influence human infectious diseases and how human infectious diseases might likewise affect food production and distribution. Feeding 11 billion people will require substantial increases in crop and animal production that will expand agricultural use of antibiotics, water, pesticides and fertilizer, and contact rates between humans and both wild and domestic animals, all with consequences for the emergence and spread of infectious agents. Indeed, our synthesis of the literature suggests that, since 1940, agricultural drivers were associated with >25% of all -and >50% of zoonotic -infectious diseases that emerged in humans, proportions that will likely increase as agriculture expands and intensifies. We identify agricultural and disease management and policy actions, and additional research, needed to address the public health challenge posed by feeding 11 billion people.

show abstract

“…If management problems can be addressed and if biological control agents can be used judiciously-only where they are likely to prove successful without causing environmental harm, they may represent a valuable asset in integrated schistosomiasis control programs. 77 It is also important to recognize that all future snail control operations will be greatly influenced by the changing environmental circumstances in which we find ourselves. Molluscicide applications are greatly affected by seasonal changes in rainfall and habitat volumes.…”

Section: Lessons Learnedmentioning

confidence: 99%

“…If management problems can be addressed and if biological control agents can be used judiciously—only where they are likely to prove successful without causing environmental harm, they may represent a valuable asset in integrated schistosomiasis control programs. 77 …”

Section: Lessons Learnedmentioning

confidence: 99%

Snail-Related Contributions from the Schistosomiasis Consortium for Operational Research and Evaluation Program Including Xenomonitoring, Focal Mollusciciding, Biological Control, and Modeling

Allan

Shaali

Tian-Bi

et al. 2020

The American Journal of Tropical Medicine and Hygiene

View full text Add to dashboard Cite

The Schistosomiasis Consortium for Operational Research and Evaluation (SCORE) was created in 2008 to answer questions of importance to program managers working to reduce the burden of schistosomiasis in Africa. In the past, intermediate host snail monitoring and control was an important part of integrated schistosomiasis control. However, in Africa, efforts to control snails have declined dramatically over the last 30 years. A resurgence of interest in the control of snails has been prompted by the realization, backed by a World Health Assembly resolution (WHA65.21), that mass drug administration alone may be insufficient to achieve schistosomiasis elimination. SCORE has supported work on snail identification and mapping and investigated how xenomonitoring techniques can aid in the identification of infected snails and thereby identify potential transmission areas. Focal mollusciciding with niclosamide was undertaken in Zanzibar and Côte d'Ivoire as a part of elimination studies. Two studies involving biological control of snails were conducted: one explored the association of freshwater riverine prawns and snail hosts in Côte d'Ivoire and the other assessed the current distribution of Procambarus clarkii, the invasive Louisiana red swamp crayfish, in Kenya and its association with snail hosts and schistosomiasis transmission. SCORE also supported modeling studies on the importance of snail control in achieving elimination and a meta-analysis of the impact of molluscicide-based snail control programs on human schistosomiasis prevalence and incidence. SCORE's snail control studies contributed to increased investment in building capacity, and specimens collected during SCORE research deposited in the Schistosomiasis Collections at the Natural History Museum (SCAN) will provide a valuable resource for the years to come.

show abstract

Modelled effects of prawn aquaculture on poverty alleviation and schistosomiasis control

Cited by 34 publications

References 55 publications

When should we expect predator biocontrol of human schistosomes to backfire?

When should we expect predator biocontrol of human schistosomes to backfire?

Emerging human infectious diseases and the links to global food production

Snail-Related Contributions from the Schistosomiasis Consortium for Operational Research and Evaluation Program Including Xenomonitoring, Focal Mollusciciding, Biological Control, and Modeling

Contact Info

Product

Resources

About