Adrian S. Seymour

Operation Wallacea

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Diego Jordano

University of Córdoba

Stephen Harris

Pennsylvania State University

Andrew P. Jennings

Instituto Pró-Carnívoros

David J. Smith

University of Essex

Jessica Haapkylä

James Cook University

David Gutiérrez

Universidad Rey Juan Carlos

Andreas Wilting

Leibniz Institute for Zoo and Wildlife Research

G. B. Wilson

University of Minnesota

Lucy Bhageerutty

Mauritian Wildlife Foundation

J. Trebilco

University of Tasmania

Cooperative Institutions

University of Bristol

Centre National de la Recherche Scientifique

Institut de Systématique, Évolution, Biodiversité

École Pratique des Hautes Études

Sorbonne Université

Mauritian Wildlife Foundation

University of Córdoba

Leibniz Institute for Zoo and Wildlife Research

Operation Wallacea

National Centre for Biological Sciences

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Effects of El Niño on the population dynamics of the Malay civet east of the Wallace line

Journal of Zoology (2017)

Adrian S. Seymour M. R. Tarrant Brian D. Gerber Alexander R. Sharp J. Woollam

Abstract The effect of climate on the population dynamics of rainforest vertebrates is known only for a limited subset of species and study locations. To extend this knowledge, we carried out an 8‐year population study of a Viverrid (Malay civet Viverra tangalunga ) in the Wallacea biogeographical region (Buton Island, Sulawesi). Civets were trapped annually from 2003 to 2010, during which there were four weak to moderate El Niño events and one moderate La Niña event. In Indonesia, El Niño events are associated with drier than normal conditions, while La Niña is associated with wetter conditions. The number of individuals captured was strongly correlated with the 12‐month summed Southern Oscillation Index ( SOI ) prior to trapping, with significantly fewer individuals caught in years with lower summed SOI (i.e. stronger El Niño conditions). Adult civet body mass was significantly higher in El Niño years; mean adult male and female body masses were 10.6% and 4.0% greater in El Niño years. There was support for a 1‐year time lagged effect of El Niño on the apparent survival (1 – probability of disappearing from the study site due to death or emigration) of male (but not female) civets, which was approximately 50% higher in the year following El Niño events. Using spatially explicit capture–mark–recapture models, we were unable to detect any significant change in civet density between years, which was estimated as 1.36 ± 0.14 ( se ) individuals km −2 . We suggest that increased apparent survival of males observed in the year after El Niño events was brought about by reduced dispersal (possibly associated with a change in mating tactic) rather than reduced mortality.

Malay

Population density

10.1111/jzo.12469

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The untamed shrew: on the termination of an eradication programme for an introduced species

Journal of Applied Ecology (2008)

Andrew R. Solow Adrian S. Seymour Andrew Beet Stephen Harris

Summary One option in managing introductions of non‐native pest species is to eradicate the introduced species by trapping or otherwise removing individuals. A central issue in undertaking such a programme is deciding when it is reasonable to terminate the programme because all individuals have been removed. This decision requires knowledge of the probability that complete eradication has been achieved. An objective Bayesian method is presented to determine the probability that all individuals of an introduced species have been removed. The method is based on the excess trapping times of individuals beyond a specified threshold, assuming a generalized Pareto distribution for excess trapping time. The method is applied to data from an unsuccessful trapping programme of the Asian musk shrew Suncus murinus on the Mauritian island of Ile aux Aigrettes. The results suggest that, had the method been used, managers would have realized that the probability of complete eradication was not high and premature termination could have been avoided. Synthesis and applications . A central issue facing the manager of an eradication programme for an introduced or pest species is deciding when it is reasonable to terminate the programme because all individuals have been removed. If termination is premature, the programme will fail; if termination is delayed beyond the point of eradication, unnecessary costs will be incurred. The statistical method described here for calculating the probability of complete eradication based on the record of removals provides information that is useful either in an informal assessment of progress or in more formal decision making regarding termination.

10.1111/j.1365-2664.2007.01446.x

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Estructura espacial y dispersión en las poblaciones de mariposas: modelos y experimentos con "plebejos argus" en Doñana

David Gutiérrez Adrian S. Seymour Pilar Fernández‐Rebollo J. Fernández Haeger Diego Jordano

Argus

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