Dietary niche overlap of free-roaming dingoes and domestic dogs

The role of human-provided food

Thomas M. Newsome, Guy Anthony Ballard, Mathew Crowther, Peter J S Fleming, C Dickman

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

As both companion animals and opportunistic predators, dogs (Canis lupus spp.) have had a long and complex relationship with humans. In Australia, the dingo (C. l. dingo) was introduced 4,000 years ago and, other than humans, is now the continent's top mammalian predator. Domestic dogs (C. l. familiaris) were introduced by Europeans more recently and they interbreed with dingoes. This hybridization has caused growing concern about the roles that domestic dogs and dingoes play in shaping ecosystem processes. There is also considerable debate about whether anthropogenic environmental changes can alter the ecological roles of dingoes. We used scat analysis to test whether the dingo, as the longer-established predator, occupies a different dietary niche from that of free-roaming domestic dogs, irrespective of human influence. Our results demonstrate considerable dietary overlap between dingoes and domestic dogs in areas where humans provide supplementary food, providing evidence against our hypothesis. However, the consumption by dingoes of a greater diversity of prey, in association with historical differences in the interactions between dingoes and humans, suggests a partial separation of their dietary niche from that of domestic dogs. We conclude that anthropogenic changes in resource availability could prevent dingoes from fulfilling their trophic regulatory or pre-European roles. Effective management of human-provided food is therefore required urgently to minimize the potential for subsidized populations of dingoes and domestic dogs to negatively affect co-occurring prey.
Original languageEnglish
Pages (from-to)392-403
Number of pages12
JournalJournal of Mammalogy
Volume95
Issue number2
DOIs
Publication statusPublished - 15 Apr 2014

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dingoes
niche overlap
niches
Dogs
Food
food
dogs
predator
niche
dietary overlap
predators
Pets
resource availability
dog
feces
Ecosystem
environmental change
Canis lupus
pets
ecosystem

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Newsome, T. M., Ballard, G. A., Crowther, M., Fleming, P. J. S., & Dickman, C. (2014). Dietary niche overlap of free-roaming dingoes and domestic dogs: The role of human-provided food. Journal of Mammalogy, 95(2), 392-403. https://doi.org/10.1644/13-MAMM-A-145.1
Newsome, Thomas M. ; Ballard, Guy Anthony ; Crowther, Mathew ; Fleming, Peter J S ; Dickman, C. / Dietary niche overlap of free-roaming dingoes and domestic dogs : The role of human-provided food. In: Journal of Mammalogy. 2014 ; Vol. 95, No. 2. pp. 392-403.
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Newsome, TM, Ballard, GA, Crowther, M, Fleming, PJS & Dickman, C 2014, 'Dietary niche overlap of free-roaming dingoes and domestic dogs: The role of human-provided food', Journal of Mammalogy, vol. 95, no. 2, pp. 392-403. https://doi.org/10.1644/13-MAMM-A-145.1

Dietary niche overlap of free-roaming dingoes and domestic dogs : The role of human-provided food. / Newsome, Thomas M.; Ballard, Guy Anthony; Crowther, Mathew; Fleming, Peter J S; Dickman, C.

In: Journal of Mammalogy, Vol. 95, No. 2, 15.04.2014, p. 392-403.

Research output: Contribution to journalArticle

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T1 - Dietary niche overlap of free-roaming dingoes and domestic dogs

T2 - The role of human-provided food

AU - Newsome, Thomas M.

AU - Ballard, Guy Anthony

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AU - Dickman, C

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AB - As both companion animals and opportunistic predators, dogs (Canis lupus spp.) have had a long and complex relationship with humans. In Australia, the dingo (C. l. dingo) was introduced 4,000 years ago and, other than humans, is now the continent's top mammalian predator. Domestic dogs (C. l. familiaris) were introduced by Europeans more recently and they interbreed with dingoes. This hybridization has caused growing concern about the roles that domestic dogs and dingoes play in shaping ecosystem processes. There is also considerable debate about whether anthropogenic environmental changes can alter the ecological roles of dingoes. We used scat analysis to test whether the dingo, as the longer-established predator, occupies a different dietary niche from that of free-roaming domestic dogs, irrespective of human influence. Our results demonstrate considerable dietary overlap between dingoes and domestic dogs in areas where humans provide supplementary food, providing evidence against our hypothesis. However, the consumption by dingoes of a greater diversity of prey, in association with historical differences in the interactions between dingoes and humans, suggests a partial separation of their dietary niche from that of domestic dogs. We conclude that anthropogenic changes in resource availability could prevent dingoes from fulfilling their trophic regulatory or pre-European roles. Effective management of human-provided food is therefore required urgently to minimize the potential for subsidized populations of dingoes and domestic dogs to negatively affect co-occurring prey.

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