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Article << Previous     |     Next >>   Contents Vol 41(2)

Kill rates by rabbit hunters before and 16 years after introduction of rabbit haemorrhagic disease in the southern South Island, New Zealand

Carlos Rouco A C , Grant Norbury A and Dave Ramsay B

A Landcare Research, PO Box 282, Alexandra 9340, New Zealand.
B Alexandra Lions Club, PO Box 139, Alexandra 9340, New Zealand.
C Corresponding author. Email: roucoc@landcareresearch.co.nz; c.rouco@gmail.es

Wildlife Research 41(2) 136-140 http://dx.doi.org/10.1071/WR13223
Submitted: 20 December 2013  Accepted: 16 May 2014   Published: 6 June 2014


 
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Abstract

Context: European rabbits (Oryctolagus cuniculus) are serious economic and environmental pests in Australia and New Zealand. Since the illegal introduction of rabbit haemorrhagic disease virus (RHDV) in New Zealand in 1997, the disease has persisted in most rabbit populations, with major epizootics occurring usually each autumn.

Aims: We evaluated the efficacy of the virus as a biological control agent in the southern South Island.

Methods: We used an index of rabbit abundance (kills per hunter) based on a region-wide annual rabbit-hunting competition to evaluate rabbit population trends 7 years before and 16 years after the first outbreak of RHD. We also evaluated the influence of rainfall and temperature in the preceding year on post-RHD trends in the index.

Key results: Kill rates declined by 60% following the initial epizootic. They remained low for the following 3 years and then increased steadily to intermediate levels punctuated by occasional declines. The instantaneous rate of increase in kill rates during the increase phase was low, but above zero (0.04 per year). No relationship between kill rates and rainfall was apparent, but there was a negative relationship between kill rates and winter temperature in the preceding season.

Conclusions: The kill-rate data obtained from this hunting competition suggest that RHD still appears to be killing rabbits. Every 2–3 years over the past decade, kill rates have been as low as they were when government rabbit-control programs were in place before RHD arrived, but the efficacy of RHD as a biological control agent is waning compared with the first outbreaks of the disease. This concurs with findings based on spotlight counts.

Implications: The data collected from this hunting competition are a good example of how ‘citizen science’ can be used to capture large volumes of pest-monitoring data from a wide geographic region for very little cost. The information is a valuable addition to understanding the effects of a major wildlife disease.

Additional keywords: citizen science, Easter Bunny Hunt, Oryctolagus cuniculus, rainfall, rate of increase, temperature.


References

Aars, J., and Ims, R. A. (2002). Intrinsic and climatic determinants of population demography: the winter dynamics of tundra voles. Ecology 83, 3449–3456.
CrossRef |

Besnard, A., Novoab, C., and Gimenez, O. (2010). Hunting impact on the population dynamics of Pyrenean grey partridge Perdix perdix hispaniensis. Wildlife Biology 16, 135–143.
CrossRef |

Cruz, J., Glen, A. S., and Pech, R. P. (2013). Modelling landscape-level numerical responses of predators to prey: the case of cats and rabbits. PLoS ONE 8, e73544.
CrossRef | CAS | PubMed |

Farfán, M. A., Vargas, J. M., Guerrero, J. C., Barbosa, A. M., Duarte, J., and Real, R. (2008). Distribution modelling of wild rabbit hunting yields in its original area (S Iberian Peninsula). The Italian Journal of Zoology 75, 161–172.
CrossRef |

Hone, J. (1999). On rate of increase (r): patterns of variation in Australian mammals and the implications for wildlife management. Journal of Applied Ecology 36, 709–718.
CrossRef |

Lough, R. S. (2009). The current state of rabbit management in New Zealand. Ministry of Agriculture and Forestry, New Zealand.

Mutze, G., Bird, P., Kovaliski, J., Peacock, D., Jennings, S., and Cooke, B. (2002). Emerging epidemiological patterns in rabbit haemorrhagic disease, its interaction with myxomatosis, and their effects on rabbit populations in South Australia. Wildlife Research 29, 577–590.
CrossRef |

Norbury, G. (2001). Conserving dryland lizards by reducing predator-mediated apparent competition and direct competition with introduced rabbits. Journal of Applied Ecology 38, 1350–1361.
CrossRef |

Norbury, D. C., and Norbury, G. (1996). Short-term effects of rabbit grazing on a degraded short-tussock grassland in Central Otago. New Zealand Journal of Ecology 20, 285–288.

Norbury, G., and Reddiex, B. (2005). European rabbit. In ‘The Handbook of New Zealand Mammals’. (Ed. C. M. King.) pp. 131–150. (Oxford University Press: Melbourne.)

Norbury, G., Heyward, R., and Parkes, J. P. (2002). Short-term ecological effects of rabbit haemorrhagic disease in the short-tussock grasslands of the South Island, New Zealand. Wildlife Research 29, 599–604.
CrossRef |

Norbury, G., Heyward, R., and Parkes, J. P. (2009). Skink and invertebrate abundance in relation to vegetation, rabbits and predators in a New Zealand dryland ecosystem. New Zealand Journal of Ecology 33, 24–31.

O’Hara, P. J. (1997). Decision on the application to approve the importation of rabbit calicivirus as a biological control agent for feral rabbits. Ministry of Agriculture, New Zealand.

Palomares, F. (2003). The negative impact of heavy rains on the abundance of a Mediterranean population of European rabbits. Mammalian Biology 68, 224–234.
CrossRef |

Parkes, J. P., Norbury, G. L., Heyward, R. P., and Sullivan, G. (2002). Epidemiology of rabbit haemorrhagic disease (RHD) in the South Island, New Zealand, 1997–2001. Wildlife Research 29, 543–555.
CrossRef |

Parkes, J. P., Glentworth, B., and Sullivan, G. (2008). Changes in immunity to rabbit haemorrhagic disease virus, and in abundance and rates of increase of wild rabbits in Mackenzie Basin, New Zealand. Wildlife Research 35, 775–779.
CrossRef |

Richardson, B. J., Phillips, S., Hayes, R. A., Sindhe, S., and Cooke, B. D. (2007). Aspects of the biology of the European rabbit (Oryctolagus cuniculus) and rabbit haemorrhagic disease virus (RHDV) in coastal eastern Australia. Wildlife Research 34, 398–407.
CrossRef |

Robson, D. L. (1993). Natural mortality of juvenile rabbits (Oryctolagus cuniculus) in North Canterbury, New Zealand. Wildlife Research 20, 815–831.
CrossRef |

Rödel, H. G., and Dekker, J. J. A. (2012). Influence of weather factors on population dynamics of two lagomorph species based on hunting bag records. European Journal of Wildlife Research 58, 923–932.
CrossRef |

Rödel, H. G., Bora, A., Kaetzke, P., Khaschei, M., Hutzelmeyer, H., and von Holst, D. (2004). Over-winter survival in subadult European rabbits: weather effects, density dependence, and the impact of individual characteristics. Oecologia 140, 566–576.
CrossRef | PubMed |

Sæther, B. E., Lillegard, M., Grotan, V., Filli, F., and Engen, S. (2007). Predicting fluctuations of reintroduced ibex populations: the importance of density dependence, environmental stochasticity and uncertain population estimates. Journal of Animal Ecology 76, 326–336.
CrossRef | PubMed |

Scroggie, M. P., Parkes, J. P., Norbury, G., Reddiex, B., and Heyward, R. (2012). Lagomorph and sheep effects on vegetation growth in dry and mesic grasslands in Otago, New Zealand. Wildlife Research 39, 721–730.
CrossRef |

Silvertown, J. (2009). A new dawn for citizen science. Trends in Ecology & Evolution 24, 467–471.
CrossRef |

Tablado, Z., Revilla, E., and Palomares, F. (2012). Dying like rabbits: general determinants of spatio-temporal variability in survival. Journal of Animal Ecology 81, 150–161.
CrossRef | PubMed |

Thompson, J., and Clark, G. (1997). Rabbit calicivirus now established in New Zealand. Surveillance 24, 5–6.

Willebrand, T., Hörnell-Willebrand, M., and Asmyhr, L. (2011). Willow grouse bag size is more sensitive to variation in hunter effort than to variation in willow grouse density. Oikos 120, 1667–1673.
CrossRef |


   
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