9 Works

Immigrant males’ memory acts to reduce ranging overlap and mating competition in wild baboons

Julien Collet, Nathalie Pettorelli, Alice Baniel, Alecia Carter, Elise Huchard, Andrew King, Alexander Lee, Harry Marshall & Guy Cowlishaw
Mechanistic models suggest that information acquired by animals (“knowledge”) could shape home range patterns and dynamics, and how neighbours share space. In social species this would suggest that immigrants could bring new knowledge into social groups, potentially affecting the dynamics of home range overlap. We tested this “immigrant knowledge hypothesis” in a wild population of chacma baboons (Papio ursinus). We used data collected between 2005 and 2013 on two neighbouring troops in Namibia, comprising GPS...

Predator biomass, prey biomass landcover and climate data from spotted hyaena and lion sites in Africa

Angharad Jones, Simon Blockley, Danielle Schreve & Chris Carbone
The spotted hyaena (Crocuta crocuta Erxleben) and the lion (Panthera leo Linnaeus) are two of the most abundant and charismatic large mammalian carnivores in Africa and yet both are experiencing declining populations and significant pressures from environmental change. However, with few exceptions, most studies have focused on influences upon spotted hyaena and lion populations within individual sites, rather than synthesising data from multiple locations. This has impeded the identification of over-arching trends behind the changing...

Capturing the dynamics of small populations: A retrospective assessment using long-term data for an island reintroduction

Doug Armstrong, Elizabeth Parlato, Barbara Egli, Wendy Dimond, Åsa Berggren, Mhairi McCready, Kevin Parker & John Ewen
1. The art of population modelling is to incorporate factors essential for capturing a population’s dynamics while otherwise keeping the model as simple as possible. However, it is unclear how optimal model complexity should be assessed, and whether this optimal complexity has been affected by recent advances in modelling methodology. This issue is particularly relevant to small populations because they are subject to complex dynamics but inferences about those dynamics are often constrained by small...

Post-epizootic microbiome associations across communities of neotropical amphibians

Phillip Jervis, Pol Pintanel, Kevin Hopkins, Claudia Wierzbicki, Jennifer Shelton, Emily Skelly, Goncalo Rosa, Diego Almeida-Reinoso, Maria Eugenia-Ordonez, Santiago Ron, Xavier Harrison, Andres Merino-Viteri & Matthew Fisher
Microbiome-pathogen interactions are increasingly recognised as an important element of host immunity. While these host-level interactions will have consequences for community disease dynamics, the factors which influence host microbiomes at larger scales are poorly understood. We here describe landscape scale pathogen-microbiome associations within the context of post-epizootic amphibian chytridiomycosis, a disease caused by the panzootic chytrid fungus Batrachochytrium dendrobatidis. We undertook a survey of Neotropical amphibians across altitudinal gradients in Ecuador ~30 years following the...

Ocean-scale footprint of a highly mobile fishing fleet: social-ecological drivers of fleet behaviour and evidence of illegal fishing

Claire Collins, Ana Nuno, Aloka Benaragama, Annette Broderick, Isuru Wijesundara, Dilhara Wijetunge & Tom Letessier
Managing the footprint of highly mobile fishing fleets is increasingly important due to continuing declines of fish populations. However, social-ecological drivers for fisher behaviour remain poorly understood for many fleets globally. Using the Sri Lankan fleet as a case study, we explored the role of social, environmental and policy drivers of effort distribution and illegal fishing. We used semi-structured interviews and participatory mapping with 95 fishers, combined with explanatory modelling (Generalised Linear Models, GLM) and...

Within-year and among-year variation in impacts of targeted conservation management on juvenile survival in a threatened population

Sarah Fenn, Eric Bignal, Sue Bignal, Amanda Trask, Davy McCracken, Pat Monaghan & Jane Reid
1. Overall impacts of targeted conservation interventions on population growth rate (λ) will depend on within-year and among-year variation in exposure of target individuals to interventions, and in intervention efficacy in increasing vital rates of exposed individuals. Juvenile survival is one key vital rate that commonly varies substantially within and among years, and consequently drives variation in λ. However, within-year, among-year and overall impacts of targeted interventions on population-wide survival probabilities of potentially mobile juveniles...

Data from: Integrated population models poorly estimate the demographic contribution of immigration

Matthieu Paquet, Jonas Knape, Debora Arlt, Pär Forslund, Tomas Pärt, Øystein Flagstad, Carl G. Jones, Malcolm A. C. Nicoll, Ken Norris, Josephine M. Pemberton, Håkan Sand, Linn Svensson, Vikash Tatayah, Petter Wabakken, Camilla Wikenros, Mikael Åkesson & Matthew Low
Estimating the contribution of demographic parameters to changes in population growth is essential for understanding why populations fluctuate. Integrated Population Models (IPMs) offer a possibility to estimate contributions of additional demographic parameters, for which no data have been explicitly collected: typically immigration. Such parametersare often subsequently highlighted as important drivers of population growth. Yet, accuracy in estimating their temporal variation, and consequently their contribution to changes in population growth rate, has not been investigated. To...

Data associated with Leech, McDowall et al 2021 microbiome composition and predicted function

Amanda Bretman, Laurin McDowall, Thomas Leech, Laurin McDowall, Kevin Hopkins, Steven Sait & Xavier Harrison
Social environments influence multiple traits of individuals including immunity, stress and ageing, often in sex-specific ways. The composition of the microbiome (the assemblage of symbiotic microorganisms within a host) is determined by environmental factors and the host’s immune, endocrine and neural systems. The social environment could alter host microbiomes extrinsically by affecting transmission between individuals, likely promoting homogeneity in the microbiome of social partners. Alternatively, intrinsic effects arising from interactions between the microbiome and host...

Prevalence of Batrachochytrium dendrobatidis and Batrachochytrium salamandrivorans in thre Hoang Lien Range, northwest Vietnam

Benjamin Tapley, Phillip Jervis, Luan Nguyen, Christopher Portway, Chung Nguyen, Hao Luong, Daniel Kane, Lola Brookes, Matthew Perkins, Pria Ghosh, Claudia Wierzbicki, Jennifer Shelton, Matthew Fisher & Jodi Rowley
This study aims to investigate the presence of the amphibian chytrid fungi Batrachochytrium dendrobatidis (Bd) and Batrachochytrium salamandrivorans (Bsal) in the Hoang Lien Range, northwest Vietnam as well as any patterns in Bd infection in space, time and host species over a five-year sampling period. This study also aims to investigate the presence of Bsal in the Hoang Lien Range.

Registration Year

  • 2021
    9

Resource Types

  • Dataset
    9

Affiliations

  • Zoological Society of London
    9
  • Swedish University of Agricultural Sciences
    2
  • University of Exeter
    2
  • Imperial College London
    2
  • Parker Conservation
    1
  • University of Glasgow
    1
  • University of Aberdeen
    1
  • Institut des Sciences de l'Evolution de Montpellier
    1
  • University of Edinburgh
    1
  • University of Leeds
    1