Do mallard ducks feature in the diet of stoats in an agricultural landscape?

Stewart, Cohen; Garrick, Erin; McAulay, Jamie

doi:10.1080/03014223.2019.1691019

Cited by 2 publications

(1 citation statement)

References 34 publications

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“…The technique has been used to study niche width and individual specialisation by predators. Most commonly used within freshwater ecology, the tool has also been applied to study invasive mammals (Shiels et al 2013;Stewart et al 2019). This work has mainly been descriptive, aiming to identify the diet or habitat preferences of invasive mammals.…”

Section: Introductionmentioning

confidence: 99%

Individual specialists within a generalist niche: variable diet of stoats and implications for conservation

McAulay¹,

Monks²,

Wilson³

et al. 2021

NZJE

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Conservation programmes aiming to suppress or remove invasive small mammal populations that threaten endemic fauna assume that eliminating an individual predator has the same effect as eliminating a conspecific in terms of decreasing risk to the prey species. However, marked between-individual variation in prey take could, at times, lead to uneven predation pressure. Such variation in the diets of introduced predators has long been hypothesised in New Zealand, suggesting that some observed rates of predation are not typical of the prey population as a whole. We used stable isotope analysis to estimate the isotopic dietary niches of stoats Mustela erminea (n = 51) caught in three New Zealand National Parks. We modelled δ13C and δ15N ratios from five tissue types to estimate the isotopic niche for each individual stoat, and for each population. The isotopic niche used by the population of stoats in Nelson Lakes National Park was substantially larger (5.3 ‰2) than for those at either Mt Aspiring National Park (3.1 ‰2) or Fiordland National Park (2.8 ‰2). Despite this, a measure of individual specialisation (proportional niche use) in stoats at Nelson Lakes National Park (0.4 ± 0.3) was similar to the other two sites. Collectively these data suggest a comparable degree of individual specialisation even within a more generalist population niche. This variability in the range of prey items taken by small carnivores, between populations and individuals of the same species, has consequences for how we design and monitor small mammal control programmes; for example, the threatened species outcomes observed in one area or time period may not be applicable to another.

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Section: Introductionmentioning

confidence: 99%

Individual specialists within a generalist niche: variable diet of stoats and implications for conservation

McAulay¹,

Monks²,

Wilson³

et al. 2021

NZJE

Self Cite

View full text Add to dashboard Cite

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Climate match is key to predict range expansion of the world's worst invasive terrestrial vertebrates

Du,

Wang,

Ashraf

et al. 2024

Global Change Biology

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Understanding the determinants of the range expansion of invasive alien species is crucial for developing effective prevention and control strategies. Nevertheless, we still lack a global picture of the potential factors influencing the invaded range expansion across taxonomic groups, especially for the world's worst invaders with high ecological and economic impacts. Here, by extensively collecting data on 363 distributional ranges of 19 of world's worst invasive terrestrial vertebrates across 135 invaded administrative jurisdictions, we observed remarkable variations in the range expansion across species and taxonomic groups. After controlling for taxonomic and geographic pseudoreplicates, model averaging analyses based on generalized additive mixed‐effect models showed that species in invaded regions having climates more similar to those of their native ranges tended to undergo a larger range expansion. In addition, as proxies of propagule pressure and human‐assisted transportation, the number of introduction events and the road network density were also important predictors facilitating the range expansion. Further variance partitioning analyses validated the predominant role of climate match in explaining the range expansion. Our study demonstrated that regions with similar climates to their native ranges could still be prioritized to prevent the spread of invasive species under the sustained global change.

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Do mallard ducks feature in the diet of stoats in an agricultural landscape?

Cited by 2 publications

References 34 publications

Individual specialists within a generalist niche: variable diet of stoats and implications for conservation

Individual specialists within a generalist niche: variable diet of stoats and implications for conservation

Climate match is key to predict range expansion of the world's worst invasive terrestrial vertebrates

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