The Impact of Nile Crocodiles on Rural Livelihoods in Northeastern Namibia

Aust, Patrick W.; Boyle, Brenna; Fergusson, R.; Coulson, Tim

doi:10.3957/056.039.0107

Cited by 42 publications

(37 citation statements)

References 16 publications

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“…In many parts of Africa, including the GNP, humans and livestock are commonly attacked by crocodiles, thereby fuelling human-wildlife conflict (Aust et al, 2009;Fergusson, 2010;Gandiwa, 2011). This crocodile-human conflict is however, exacerbated by the increasing concentration of humans on large rivers, for reasons of day-to-day survival (Lamarque et al, 2009).…”

Section: Discussionmentioning

confidence: 97%

“…This crocodile-human conflict is however, exacerbated by the increasing concentration of humans on large rivers, for reasons of day-to-day survival (Lamarque et al, 2009). It has been suggested that crocodile densities exhibit a negative correlation with human densities and development patterns (Aust et al, 2009), hence increased human concentration and developments near major rivers will likely result in lower crocodile populations. In the GNP ecosystem, crocodilehuman conflicts are a common phenomenon, particularly in communities living on the park edges bordering major rivers (E. Gandiwa, personal observation).…”

Section: Discussionmentioning

confidence: 99%

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Short communication: Abundance, distribution and population trends of Nile crocodile (<i>Crocodylus niloticus</i>) in Gonarezhou National Park, Zimbabwe

Zisadza-Gandiwa

Gandiwa

Jakarasi³

et al. 2013

WSA

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The Nile crocodile (Crocodylus niloticus) is an iconic or keystone species in many aquatic ecosystems. In order to understand the abundance, distribution, and population trends of Nile crocodiles in Gonarezhou National Park (GNP), southeastern Zimbabwe, we carried out 4 annual aerial surveys, using a Super Cub aircraft, along 3 major rivers, namely, Save, Runde and Mwenezi, between 2008 and 2011. Our results show that Runde River was characterised by a significant increase in Nile crocodile abundance whereas both Save and Mwenezi rivers were characterised by non-significant increases in Nile crocodile abundance. Overall, we recorded a significant increase in total Nile crocodile population in the three major rivers of the GNP. The non-significant increase in Nile crocodiles in the Mwenezi and Save rivers was likely due to habitat loss, through siltation of large pools, and conflicts with humans, among other factors. We suggest that GNP management should consider halting crocodile egg collection in rivers with low crocodile populations and continuously monitor the crocodile population in the park.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Short communication: Abundance, distribution and population trends of Nile crocodile (<i>Crocodylus niloticus</i>) in Gonarezhou National Park, Zimbabwe

Zisadza-Gandiwa

Gandiwa

Jakarasi³

et al. 2013

WSA

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“…Thus, a common response has been to build up an evidence base and develop a scientifically robust approach to understanding and mitigating these impacts (e.g., Quigley & Herrero 2005;Aust et al 2009). Managers and ecologists have tended to make 3 key assumptions: the level of damage from predation is directly related to the level of conflict; the level of conflict elicits a response proportional to the level of damage; and mitigation activities appropriate to the level of conflict and damage lead to proportional increases in support for conservation (reported by Dickman 2010).…”

Section: Current Approaches To Human-predator Conflict Mitigationmentioning

confidence: 99%

“…3, 2017 (Panthera pardus), and pumas (Puma concolor), for example, have learned to live alongside humans with few problematic encounters. On the other hand, certain places have long been notorious for so-called man-eating predators, for example Nile crocodiles along stretches of the lower Zambezi or the Chobe in Namibia (Livingstone 1858;Stevenson-Hamilton 1917;Aust et al 2009;Wallace et al 2011) and lions in the Rufiji River basin of southern Tanzania (Packer et al 2005).…”

Section: Conservation Biologymentioning

confidence: 99%

An interdisciplinary review of current and future approaches to improving human–predator relations

Pooley

Barua

Beinart

et al. 2017

Conservation Biology

284

220

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“…), trophy hunting (Lindsey, Roulet & Romanach ) and as breeding stock for crocodile farms, yet large adults cause the majority of human and livestock injuries and deaths (Aust et al . ; Dunham et al . ).…”

Section: Introductionmentioning

confidence: 99%

Re‐evaluating the effect of harvesting regimes on Nile crocodiles using an integral projection model

Wallace

Leslie

Coulson

2012

Journal of Animal Ecology

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Summary 1.Crocodile populations are size-structured, and for populations that are subject to harvesting, removal is typically size selective. For this reason, size-structured matrix models are typically used to analyse the dynamics of crocodile populations. The boundaries between the size classes used to classify individuals in these models are typically chosen arbitrarily. This is problematic because results can depend upon the number and width of size classes. 2. The recent development of continuous character population models termed integral projection models (IPM) has removed the need to arbitrarily classify individuals. These models are yet to be applied to harvested animal populations. 3. Using information obtained from the literature, we develop an IPM for crocodiles. We use perturbation analyses to investigate how altering size-specific demographic rates influences the population growth rate and the strength of selection on snout to vent length. 4. We find that perturbations can lead to complex responses. Sensitivity analysis to population growth and fertility selection reveals that the smallest animals and the sizes of early breeding individuals and their eggs may have more influence on these population biology parameters than previously thought. 5. Although our model is relatively simple, our results show that IPM can be used to gain theoretical insight into the possible consequences of altering size-specific demographic rates on the population and evolutionary ecology of harvested populations.

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The Impact of Nile Crocodiles on Rural Livelihoods in Northeastern Namibia

Cited by 42 publications

References 16 publications

Short communication: Abundance, distribution and population trends of Nile crocodile (<i>Crocodylus niloticus</i>) in Gonarezhou National Park, Zimbabwe

Short communication: Abundance, distribution and population trends of Nile crocodile (<i>Crocodylus niloticus</i>) in Gonarezhou National Park, Zimbabwe

An interdisciplinary review of current and future approaches to improving human–predator relations

Re‐evaluating the effect of harvesting regimes on Nile crocodiles using an integral projection model

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