Predator control for protecting kaki ( Himantopus novaezelandiae )—lessons from 20 years of management

Keedwell, Rachel J.; Maloney, Richard F.; Murray, Dave

doi:10.1016/s0006-3207(01)00220-8

Cited by 37 publications

(18 citation statements)

References 13 publications

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“…This study indicates the potential importance of considering climate during management activities such as predator control (Reynolds and Tapper 1996) or reducing the impacts of introduced species (Harding et al 2001), which could provide insight into their level of success (Keedwell 2002). Our results suggest that wolf removal would be most effective, in terms of increasing calf recruitment, during poor springs.…”

Section: Resultsmentioning

confidence: 99%

Interacting effect of wolves and climate on recruitment in a northern mountain caribou population

Hegel

Mysterud

Huettmann

et al. 2010

Oikos

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There is limited research on the influence of Pacific‐based climate in large herbivore populations. Additionally, much of our understanding on the effect of large‐scale climate on ungulate population dynamics has occurred on forage‐limited rather than predator‐limited populations. We compared the influence of the Pacific Decadal Oscillation (PDO), North Pacific Index, and local weather on recruitment in a predator‐limited mountain‐dwelling caribou Rangifer tarandus caribou population in the Yukon Territory, Canada, across a range of wolf Canis lupus densities. A large‐scale wolf removal program allowed us to examine the role of Pacific climate and weather when wolves were reduced to ∼15% of their pre‐removal levels. Recruitment was best explained by the interaction of wolf density and April‐PDO, with wolf density explaining the most deviance. Predicted recruitment during good springs was 0.45 (SE = 0.04) during wolf removal and 0.29 (SE = 0.03) with no wolf removal. During poor springs (low PDO, increased snow depth) predicted recruitment was 0.55 (SE = 0.10) during wolf removal and 0.12 (SE = 0.03) with no wolf removal. With non‐altered wolf densities, there was a positive relationship between April‐PDO and recruitment due to reduced snow depth at calving, allowing parturient females to disperse up in elevation away from predators. When wolf densities were substantially reduced there was a slight negative relationship between April‐PDO and recruitment, possibly due to a more rapid vegetation green‐up reducing the temporal availability of highly nutritious forage necessary for lactation and subsequent calf growth. Attempts to find general relationships between climate and ungulate population dynamics have proven difficult due to different ecological mechanisms by which climate affects individuals across populations. Temporally varying factors, such as predator density, may also play an important role in uncovering the mechanistic relationship between climate and population dynamics.

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Section: Resultsmentioning

confidence: 99%

Interacting effect of wolves and climate on recruitment in a northern mountain caribou population

Hegel

Mysterud

Huettmann

et al. 2010

Oikos

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“…Por un lado son varios los trabajos que no encuentran un efecto significativo del control de depredadores sobre el incremento de las presas (Kauhala et al 2000, Keedwell et al 2002. Por ejemplo, con el objetivo de incrementar la población de un ave amenazada en Nueva Zelanda, Keedwell et al (2002) realizaron control de múltiples depredadores durante 20 años, observando cierto efecto a corto plazo, que desapareció posteriormente pese a mantener el control. Por el contrario varios estudios realizados en otros países indican que el control de depredadores produce mejoras en las poblaciones de presas , Côté y Sutherland 1997, Smith et al 2010.…”

Section: Efecto Del Control Sobre Las Presasunclassified

Conocimiento científico sobre la gestión de depredadores generalistas en España: el caso del zorro (Vulpes vulpes) y la urraca (Pica pica).

Díaz‐Ruiz

Ferreras

2013

ECOS

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“…This approach is not always suitable, however, whether because of the large ranges of well-established introduced species (Macdonald and Harrington 2003), a lack of adequate funds or because of political or public opposition (Bertolino and Genovesi 2003;Bremner and Park 2007). In such instances, targeted predator control that is limited to important sites, such as around colonies of breeding birds, is often a more acceptable option (Greenwood et al 1990;Keedwell et al 2002;Bolton et al 2007). However, such an approach to management then creates a control zone within a wider landscape matrix that continues to support predators (Janzen 1986).…”

Section: Introductionmentioning

confidence: 99%

Localised control of an introduced predator: creating problems for the future?

2011

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Introduced mammalian predators have had significant impacts on many native prey species. Although control of such predators for conservation management is becoming increasingly commonplace, it is often undertaken at a relatively small scale in relation to the overall predator population. Processes such as immigration mean that it remains difficult to determine the effectiveness of control measures. We investigated the impacts of feral ferret Mustela furo removal on the entire feral ferret population on Rathlin Island, UK. Removal of ferrets prior to breeding led to a substantial increase in the post-dispersal population through the enhanced survival of juveniles. Despite increased numbers, overwinter survival remained high, potentially aided by the reduced territoriality shown by this feral species compared to wild carnivores. The response of this ferret population to control is a further illustration of the complex ecological processes and outcomes arising from the anthropogenic disruption of wildlife populations. It highlights how partial or localised management may prove ineffective, and at worst might exacerbate the problems that management was designed to avert.

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Predator control for protecting kaki ( Himantopus novaezelandiae )—lessons from 20 years of management

Cited by 37 publications

References 13 publications

Interacting effect of wolves and climate on recruitment in a northern mountain caribou population

Interacting effect of wolves and climate on recruitment in a northern mountain caribou population

Conocimiento científico sobre la gestión de depredadores generalistas en España: el caso del zorro (Vulpes vulpes) y la urraca (Pica pica).

Localised control of an introduced predator: creating problems for the future?

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