Journal of Animal Ecology

Cover image for Vol. 83 Issue 5

Early View (Online Version of Record published before inclusion in an issue)

Edited By: Ken Wilson, Tim Coulson, Jean-Michel Gaillard and Ben Sheldon

Impact Factor: 4.726

ISI Journal Citation Reports © Ranking: 2013: 1/152 (Zoology); 21/140 (Ecology)

Online ISSN: 1365-2656

Associated Title(s): Functional Ecology, Journal of Applied Ecology, Journal of Ecology, Methods in Ecology and Evolution

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  1. 1 - 54
  1. Standard Papers

    1. Forecasting spring from afar? Timing of migration and predictability of phenology along different migration routes of an avian herbivore

      Andrea Kölzsch, Silke Bauer, Rob de Boer, Larry Griffin, David Cabot, Klaus-Michael Exo, Henk P. van der Jeugd and Bart A. Nolet

      Article first published online: 17 SEP 2014 | DOI: 10.1111/1365-2656.12281

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      This article compares spring migration timing of three barnacle geese populations using GPS tracks. The geese were not strictly following, but overtaking the green wave. Predictability of onset of spring differed with presence or absence of ecological barriers, geese arriving at stopovers close to the onset of spring at high predictability.

    2. Predators, energetics and fitness drive neonatal reproductive failure in red squirrels

      Emily K. Studd, Stan Boutin, Andrew G. McAdam, Charles J. Krebs and Murray M. Humphries

      Article first published online: 9 SEP 2014 | DOI: 10.1111/1365-2656.12279

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      This study looks are factors influencing reproductive failure in a free-ranging species over 24 years. Through the inclusion of predator abundance, and energetic and fitness costs and benefits of parental investment, we show that occurrences of reproductive failure represent a tradeoff between costs and benefits.

    3. You have full text access to this OnlineOpen article
      Predator-dependent functional response in wolves: from food limitation to surplus killing

      Barbara Zimmermann, Håkan Sand, Petter Wabakken, Olof Liberg and Harry Peter Andreassen

      Article first published online: 6 SEP 2014 | DOI: 10.1111/1365-2656.12280

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      This study on the functional response of wild-living wolves to changes in prey density explores how not only the prey, but also predator density and interference between predators affect kill rates. The novel energetic approach to functional response modelling reveals surplus-killing in small and food limitation in large wolf packs.

    4. Effects of land-use intensity on arthropod species abundance distributions in grasslands

      Nadja K. Simons, Martin M. Gossner, Thomas M. Lewinsohn, Markus Lange, Manfred Türke and Wolfgang W. Weisser

      Article first published online: 2 SEP 2014 | DOI: 10.1111/1365-2656.12278

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      We show that community structure of grassland arthropods shifts under increasing land-use intensity (mostly fertilization), increasing the dominance of already abundant species. We also show that the majority of rare species was only found on a small proportion of grassland plots and in low abundances, restricting recolonization after disturbance events.

    5. Ecological implications of reduced forage quality on growth and survival of sympatric geese

      Samantha E. Richman, James O. Leafloor, William H. Karasov and Scott R. McWilliams

      Article first published online: 27 AUG 2014 | DOI: 10.1111/1365-2656.12270

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      Growth trajectories of Canada and lesser snow goose goslings raised on grass-based diets (protein: 10%, 14%, 18%; fibre: 30%, 45%) revealed size-related differences in growth and survival in response to diminished diet quality. Canada goose goslings were able to slow growth rates and delay reaching adult size in response to low protein in the diet, whereas snow goose goslings maintained high growth rates and were unable to survive on the low-protein diets. These differences in growth strategy indicate a sensitive, but species-specific, response to changes in forage quality and quantity in arctic ecosystems caused by abundance of the geese themselves or by climate change.

  2. Special Feature: Stuck In Motion? Reconnecting Questions And Tools In Movement Ecology

    1. ‘You shall not pass!’: quantifying barrier permeability and proximity avoidance by animals

      Hawthorne L. Beyer, Eliezer Gurarie, Luca Börger, Manuela Panzacchi, Mathieu Basille, Ivar Herfindal, Bram Van Moorter, Subhash R. Lele and Jason Matthiopoulos

      Article first published online: 25 AUG 2014 | DOI: 10.1111/1365-2656.12275

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      Here, the authors develop a framework for simultaneously quantifying the effects of habitat preference, barrier permeability and intrinsic movement ability on space use, based on a time series of telemetry locations. This approach provides insight into the effects of barriers on animal distribution and movement.

  3. Standard Papers

    1. Movement propensity and ability correlate with ecological specialization in European land snails: comparative analysis of a dispersal syndrome

      Maxime Dahirel, Eric Olivier, Annie Guiller, Marie-Claire Martin, Luc Madec and Armelle Ansart

      Article first published online: 20 AUG 2014 | DOI: 10.1111/1365-2656.12276

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      We showed experimentally, by comparing 20 species, that habitat specialization and low mobility, two traits increasing extinction risk, are correlated in slow-moving land snails, making specialist species doubly vulnerable againt current environmental changes.

    2. How detectable is predation in stage-structured populations? Insights from a simulation-testing analysis

      Kiva L. Oken and Timothy E. Essington

      Article first published online: 16 AUG 2014 | DOI: 10.1111/1365-2656.12274

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      An absence of detectable species interactions from biomass time series may be due to interactive effects of environmental variability and complex food web linkages and life histories that are largely size- and age-structured. However, predation is most detectable for systems where predators act on mortality of sub-mature life stages.

    3. Empirical tests of harvest-induced body-size evolution along a geographic gradient in Australian macropods

      Thomas A. A. Prowse, Rachel A. Correll, Christopher N. Johnson, Gavin J. Prideaux and Barry W. Brook

      Article first published online: 13 AUG 2014 | DOI: 10.1111/1365-2656.12273

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      It is often asserted that commercial harvesting of kangaroos and wallabies could be driving the evolutionary dwarfing of these species. In contrast, we demonstrate evidence of small body size increases in these species over time, consistent with reduced mortality due to a depauperate predator guild and human-improved grassland productivity.

    4. Habitat-based polymorphism is common in stream fishes

      Caroline Senay, Daniel Boisclair and Pedro R. Peres-Neto

      Article first published online: 12 AUG 2014 | DOI: 10.1111/1365-2656.12269

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      The authors test whether fish inhabiting different habitats differ in their morphologies despite stream environmental heterogeneity. No previous study has provided a systematic comparison of fish morphology across the three types of habitats for a large number of species inhabiting the same system.

    5. How topography induces reproductive asynchrony and alters gypsy moth invasion dynamics

      Jonathan A. Walter, Marcia S. Meixler, Thomas Mueller, William F. Fagan, Patrick C. Tobin and Kyle J. Haynes

      Article first published online: 4 AUG 2014 | DOI: 10.1111/1365-2656.12272

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      Mismatches in reproductive timing can limit mating opportunities, reducing population growth, but how this changes over environmental gradients is not well understood. Using field data and a model, the authors show that elevation and elevational variability affect the growth of gypsy moth populations via effects on reproductive timing.

  4. Reviews

    1. You have free access to this content
      Relationship between growth and standard metabolic rate: measurement artefacts and implications for habitat use and life-history adaptation in salmonids

      Jordan Rosenfeld, Travis Van Leeuwen, Jeffrey Richards and David Allen

      Article first published online: 4 AUG 2014 | DOI: 10.1111/1365-2656.12260

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      This manuscript clarifies some of the mechanisms that drive variation in metabolic state among individuals or through ontogeny, and highlights how they relate to variation in capacity for growth, and how they may arise from fundamental ecological tradeoffs that influence anatomical design.

  5. Standard Papers

    1. Individual and species-specific traits explain niche size and functional role in spiders as generalist predators

      Dirk Sanders, Esther Vogel and Eva Knop

      Article first published online: 31 JUL 2014 | DOI: 10.1111/1365-2656.12271

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      Here the authors use a stable isotope analysis to measure the functional role of spiders as important generalist predators and link this role to species traits and individual traits.

    2. Territoriality and home-range dynamics in meerkats, Suricata suricatta: a mechanistic modelling approach

      Andrew W. Bateman, Mark A. Lewis, Gabriella Gall, Marta B. Manser and Tim H. Clutton-Brock

      Article first published online: 29 JUL 2014 | DOI: 10.1111/1365-2656.12267

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      The authors employ mechanistic home-range models to describe meerkat space use. They find a surprising lack of group-size effect in territorial patterns of this highly social species, and they extend existing models to capture dynamical aspects of home-range development and shift.

    3. How Ebola impacts social dynamics in gorillas: a multistate modelling approach

      Céline Genton, Amandine Pierre, Romane Cristescu, Florence Lévréro, Sylvain Gatti, Jean-Sébastien Pierre, Nelly Ménard and Pascaline Le Gouar

      Article first published online: 24 JUL 2014 | DOI: 10.1111/1365-2656.12268

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      The authors provide a general framework for studying social dynamics in disturbed contexts and apply it to the case of a gorilla population affected by Ebola.

    4. Climate and the landscape of fear in an African savanna

      Corinna Riginos

      Article first published online: 24 JUL 2014 | DOI: 10.1111/1365-2656.12262

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      While there has been much study of the landscape of fear, this is one of the only experimental studies of this topic for large mammals.

    5. Experimental manipulation of female reproduction demonstrates its fitness costs in kangaroos

      Uriel Gélin, Michelle E. Wilson, Graeme Coulson and Marco Festa-Bianchet

      Article first published online: 22 JUL 2014 | DOI: 10.1111/1365-2656.12266

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      By combining the first experimental manipulation of reproductive effort in wild marsupials with long-term monitoring of multiple populations, the authors quantify the fitness consequences of reproduction.

    6. Species undersampling in tropical bat surveys: effects on emerging biodiversity patterns

      Christoph F. J. Meyer, Ludmilla M. S. Aguiar, Luis F. Aguirre, Julio Baumgarten, Frank M. Clarke, Jean-François Cosson, Sergio Estrada Villegas, Jakob Fahr, Deborah Faria, Neil Furey, Mickaël Henry, Richard K. B. Jenkins, Thomas H. Kunz, M. Cristina MacSwiney González, Isabel Moya, Jean-Marc Pons, Paul A. Racey, Katja Rex, Erica M. Sampaio, Kathryn E. Stoner, Christian C. Voigt, Dietrich von Staden, Christa D. Weise and Elisabeth K. V. Kalko

      Article first published online: 22 JUL 2014 | DOI: 10.1111/1365-2656.12261

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      This study explores inferential bias associated with species undersampling in tropical bat surveys. The authors demonstrate the potential as well as the limitations for reducing survey effort and streamlining sampling protocols, and consequently for increasing cost-effectiveness in tropical bat surveys or monitoring programs. Photo credit: C.F.J. Meyer.

    7. Fitness prospects: effects of age, sex and recruitment age on reproductive value in a long-lived seabird

      He Zhang, Maren Rebke, Peter H. Becker and Sandra Bouwhuis

      Article first published online: 22 JUL 2014 | DOI: 10.1111/1365-2656.12259

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      This paper investigates intraspecific variation in reproductive values due to age, sex and recruitment age in a long-lived seabird. It demonstrates that sex and RA affect underlying fitness traits, but that only age effects on fitness traits translate to variation in reproductive values.

    8. Ecological causes of multilevel covariance between size and first-year survival in a wild bird population

      Sandra Bouwhuis, Oscar Vedder, Colin J. Garroway and Ben C. Sheldon

      Article first published online: 17 JUL 2014 | DOI: 10.1111/1365-2656.12264

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      The paper demonstrates how correlations between traits, fitness and environment influence estimates of selection, and shows how partitioning trait-effects between levels of selection and environmental factors is a promising approach to identify potential agents of selection.

    9. Life-history trade-offs mediate ‘personality’ variation in two colour morphs of the pea aphid, Acyrthosiphon pisum

      Wiebke Schuett, Sasha R. X. Dall, Michaela H. Kloesener, Jana Baeumer, Felix Beinlich and Till Eggers

      Article first published online: 12 JUL 2014 | DOI: 10.1111/1365-2656.12263

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      Here the authors investigate whether life-history trade-offs mediate personality variation in escape responses in different colour morphs of pea aphids. The results show that, under strong trade-offs, organisms who commit to particular lifestyles (being consistent) maximise their fitness.

    10. Ecological generalism and behavioural innovation in birds: technical intelligence or the simple incorporation of new foods?

      Simon Ducatez, Joanne Clavel and Louis Lefebvre

      Article first published online: 9 JUL 2014 | DOI: 10.1111/1365-2656.12255

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      We show that the ecological generalist advantage in front of current environmental change might be related to habitat generalists being better able to incorporate new types of food in their diet. In addition, we show that diet breadth and cognition are associated, suggesting that diet breadth and cognition co-evolved.

    11. A continental scale trophic cascade from wolves through coyotes to foxes

      Thomas M. Newsome and William J. Ripple

      Article first published online: 9 JUL 2014 | DOI: 10.1111/1365-2656.12258

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      We show that the extirpation of wolves throughout North America has caused a continent-wide shift in coyote and red fox densities. To reverse this human induced cascade, wolves may need to occur continuously over large spatial areas. This presents a challenge because wolves are frequently persecuted due to human-wildlife conflicts.

    12. Impacts of breeder loss on social structure, reproduction and population growth in a social canid

      Bridget L. Borg, Scott M. Brainerd, Thomas J. Meier and Laura R. Prugh

      Article first published online: 7 JUL 2014 | DOI: 10.1111/1365-2656.12256

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      This paper quantitatively evaluates how the death of reproductive individuals in socially complex canid species could affect social group cohesion and population growth.

    13. Overcompensation and phase effects in a cyclic common vole population: between first and second-order cycles

      Frédéric Barraquand, Adrien Pinot, Nigel G. Yoccoz and Vincent Bretagnolle

      Article first published online: 2 JUL 2014 | DOI: 10.1111/1365-2656.12257

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      The density-dependence of annual growth rates is crucial to explain population cycles. Nonlinear models show why the density of the year, rather than the density a year ago as usually assumed, is most important to common vole cyclic dynamics. It suggests in turn novel potential causes for common vole cycles.

    14. Trait-based diet selection: prey behaviour and morphology predict vulnerability to predation in reef fish communities

      Stephanie J. Green and Isabelle M. Côté

      Article first published online: 25 JUN 2014 | DOI: 10.1111/1365-2656.12250

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      The authors describe a novel functional approach to studying diet selection and show that several behavioural and morphological traits exhibited by Caribbean reef fishes heighten vulnerability to predation by invasive Indo-Pacific lionfish nearly 200%.

    15. Allometric scaling of indirect effects: body size ratios predict non-consumptive effects in multi-predator systems

      Lauren Krenek and Volker H. W. Rudolf

      Article first published online: 25 JUN 2014 | DOI: 10.1111/1365-2656.12254

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      Results indicate that models which assume that predators have independent effects on their prey are particularly likely to make erroneous predictions when predators differ substantially in size, but simple allometric relationships of NCEs could be used to correct this bias.

    16. Unravelling the annual cycle in a migratory animal: breeding-season habitat loss drives population declines of monarch butterflies

      D. T. Tyler Flockhart, Jean-Baptiste Pichancourt, D. Ryan Norris and Tara G. Martin

      Article first published online: 25 JUN 2014 | DOI: 10.1111/1365-2656.12253

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      Threats to migratory animals occur at multiple periods of the annual cycle that are separated by thousands of kilometers and span international borders. Using a year-round population model, we show that population declines of monarch butterflies result from loss of breeding habitats in the United States, not from loss of wintering habitats in Mexico.

    17. Ecological divergence among colour morphs mediated by changes in spatial network structure associated with disturbance

      Matthew S. Lattanzio and Donald B. Miles

      Article first published online: 24 JUN 2014 | DOI: 10.1111/1365-2656.12252

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      Our study provides unique insight into how environmental variation resulting from disturbance may interact with variation in individual behaviour to influence the spatial structuring of animal populations. We highlight some of the key social and ecological ramifications of this interaction for populations in resource-limited habitats.

  6. Forum

    1. Why is eusociality an almost exclusively terrestrial phenomenon?

      Graeme D. Ruxton, Stuart Humphries, Lesley J. Morrell and David M. Wilkinson

      Article first published online: 24 JUN 2014 | DOI: 10.1111/1365-2656.12251

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      In this thought-provoking forum paper, the authors discuss the strange observation that while social insects such as ants, termites, bees and wasps play large roles in terrestrial ecosystems, truly social taxa are far less common in aquatic environments.

  7. Standard Papers

    1. Multi-taxa trait and functional responses to physical disturbance

      Scott M. Pedley and Paul M. Dolman

      Article first published online: 18 JUN 2014 | DOI: 10.1111/1365-2656.12249

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      This is the first study to contrast trait responses from two diverse terrestrial arthropod groups to those of vascular plants, along a single environmental gradient. The authors show that generalizations of trait response across taxa should be cautious as responses vary among taxa.

    2. You have full text access to this OnlineOpen article
      Growth trajectory influences temperature preference in fish through an effect on metabolic rate

      Shaun S. Killen

      Article first published online: 17 JUN 2014 | DOI: 10.1111/1365-2656.12244

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      This study demonstrates for the first time that dietary history and growth trajectory influence preferred temperatures of fish, with the underlying cause being the effect of compensatory growth on individual metabolic rate. As a consequence, even in regularly growing fish, increased resting metabolic demand causes a preference for cooler environments

    3. The number of competitor species is unlinked to sexual dimorphism

      Shai Meiri, Amy E. Kadison, Maria Novosolov, Panayiotis Pafilis, Johannes Foufopoulos, Yuval Itescu, Pasquale Raia and Daniel Pincheira-Donoso

      Article first published online: 16 JUN 2014 | DOI: 10.1111/1365-2656.12248

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      Sexual size dimorphism within three lizard species does not change with the number of putative competitors they face on different-sized islands in the Aegean Sea. We found, counter to expected ecological theory, sexual dimorphism does not diminish as guilds acquire more species.

    4. Prevalence and beta diversity in avian malaria communities: host species is a better predictor than geography

      Elizabeth S. C. Scordato and Melissa R. Kardish

      Article first published online: 16 JUN 2014 | DOI: 10.1111/1365-2656.12246

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      This paper uses measures of phylogenetic and community beta diversity to show that host species is a better predictor of malaria community turnover than site, providing no evidence for a distance–decay relationship in these parasite communities.

    5. Variation in abundance of nectarivorous birds: does a competitive despot interfere with flower tracking?

      Joanne M. Bennett, Rohan H. Clarke, James R. Thomson and Ralph Mac Nally

      Article first published online: 9 JUN 2014 | DOI: 10.1111/1365-2656.12245

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      Nectarivores track spatial and temporal variation in flowering but altered patterns of interspecific competition, driven by fragmentation and climate-induced vegetation degradation, deflect the distribution of small-bodied nectarivorous birds from an ‘ideal free distribution’ to an ‘ideal despotic distribution’.

    6. You have full text access to this OnlineOpen article
      Parasites and genetic diversity in an invasive bumblebee

      Catherine M. Jones and Mark J. F. Brown

      Article first published online: 3 JUN 2014 | DOI: 10.1111/1365-2656.12235

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      Using an ecologically and economically important genus of pollinators as a model system, the authors ask how enemy release, at the level of parasite communities and real parasite impact, and functional genetic diversity, contribute to the invasion success of a non-native bumblebee in the United Kingdom.

    7. Effects of spatial structure of population size on the population dynamics of barnacles across their elevational range

      Keiichi Fukaya, Takehiro Okuda, Masahiro Nakaoka and Takashi Noda

      Article first published online: 2 JUN 2014 | DOI: 10.1111/1365-2656.12234

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      This study explores the variability–range relationship of population size by analysing long-term data of intertidal barnacles collected over their vertical range. Results show a tendency that populations are variable at range margins due to increased stochastic fluctuation in growth rate, as well as an association between population size and its variability.

    8. Year-round effects of climate on demographic parameters of an arctic-nesting goose species

      Louise van Oudenhove, Gilles Gauthier and Jean-Dominique Lebreton

      Article first published online: 2 JUN 2014 | DOI: 10.1111/1365-2656.12230

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      Understanding how climate changes affect animal populations remains a major challenge, especially in arctic-nesting migratory birds exposed to different climatic regimes. With a 23-year data set, this study highlights how temperatures encountered throughout the annual cycle affect the vital rates of the greater snow geese.

    9. Mate finding, Allee effects and selection for sex-biased dispersal

      Allison K. Shaw and Hanna Kokko

      Article first published online: 2 JUN 2014 | DOI: 10.1111/1365-2656.12232

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      This article resolves contradicting predictions from the mate search and dispersal literatures about correlation between male and female dispersal and demonstrates that sex bias in dispersal depends on when mating occurs during the dispersal process.

    10. Exotic birds increase generalization and compensate for native bird decline in plant–frugivore assemblages

      Daniel García, Daniel Martínez, Daniel B. Stouffer and Jason M. Tylianakis

      Article first published online: 2 JUN 2014 | DOI: 10.1111/1365-2656.12237

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      This study shows that the stronger the integration of exotic birds in the frugivore assemblages of New Zealand, the higher the degree of generalization of plant–frugivore networks. By diversifying the frugivore guild for native plants, exotic birds may increase the resilience of seed dispersal against native bird extinction (Artwork by Daniel Martinez).

    11. Does variation in the intensity and duration of predation drive evolutionary changes in senescence?

      Matthew R. Walsh, Deirdre Whittington and Melissa J. Walsh

      Article first published online: 28 MAY 2014 | DOI: 10.1111/1365-2656.12247

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      This is a rare test of the evolutionary theory of senescence, evaluating the importance of predation on ageing and showing that increased mortality does not select for faster ageing. Such results challenge our current understanding of the importance of predation on senescence.

    12. Special structures of hoopoe eggshells enhance the adhesion of symbiont-carrying uropygial secretion that increase hatching success

      Manuel Martín-Vivaldi, Juan J. Soler, Juan M. Peralta-Sánchez, Laura Arco, Antonio M. Martín-Platero, Manuel Martínez-Bueno, Magdalena Ruiz-Rodríguez and Eva Valdivia

      Article first published online: 28 MAY 2014 | DOI: 10.1111/1365-2656.12243

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      This study provides strong evidence of a mutualistic association between hoopoes and antibiotic producing bacteria, whereby the bacteria protect embryos against infection.

    13. Temperature-dependent variation in alternative migratory tactics and its implications for fitness and population dynamics in a salmonid fish

      Kentaro Morita, Tsuyoshi Tamate, Mari Kuroki and Toru Nagasawa

      Article first published online: 27 MAY 2014 | DOI: 10.1111/1365-2656.12240

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      This study showed that the proportion of male masu salmon exhibiting migratory behavior decreased with increasing temperature. Additionally, the occurrence of delayed age at migration decreased with increasing temperature. These responses to increased temperature are explained by an adaptation to maximize fitness.

    14. Forest structure drives global diversity of primates

      Sidney F. Gouveia, Fabricio Villalobos, Ricardo Dobrovolski, Raone Beltrão-Mendes and Stephen F. Ferrari

      Article first published online: 27 MAY 2014 | DOI: 10.1111/1365-2656.12241

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      This study provides a novel account on the likely causes of the global pattern of primate species richness, namely the vertical forest structure, thus challenging previous hypothesis based on levels of rainfall or productivity.

    15. Density-dependent intraspecific aggression regulates survival in northern Yellowstone wolves (Canis lupus)

      Sarah Cubaynes, Daniel R. MacNulty, Daniel R. Stahler, Kira A. Quimby, Douglas W. Smith and Tim Coulson

      Article first published online: 21 MAY 2014 | DOI: 10.1111/1365-2656.12238

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      This article provides empirical support for the hypothesis that intrinsic density-dependent mechanisms might regulate territorial carnivore populations at high ungulate densities.

    16. Disentangling the effects of exposure and susceptibility on transmission of the zoonotic parasite Schistosoma mansoni

      David J. Civitello and Jason R. Rohr

      Article first published online: 20 MAY 2014 | DOI: 10.1111/1365-2656.12222

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      Here, the authors develop mechanistic disease transmission models to separate exposure and susceptibility and enhance predictions of the spread of a human zoonotic disease in its wildlife hosts. This approach could improve predictions of human risk and be applied to many host–parasite disease systems.

    17. Community-level demographic consequences of urbanization: an ecological network approach

      Amanda D. Rodewald, Rudolf P. Rohr, Miguel A. Fortuna and Jordi Bascompte

      Article first published online: 19 MAY 2014 | DOI: 10.1111/1365-2656.12224

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      This paper is the first to establish a link between population demography of several species and network structure. The authors demonstrate that demographic variation among populations can be explained only by using networks, not with traditional ecological predictors, including numbers of predators, landscape composition and habitat structure.

    18. Linking body mass and group dynamics in an obligate cooperative breeder

      Arpat Ozgul, Andrew W. Bateman, Sinead English, Tim Coulson and Tim H. Clutton-Brock

      Article first published online: 16 MAY 2014 | DOI: 10.1111/1365-2656.12239

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      By applying an individual- and trait-based population model to an exceptional life-history data set, the authors reveal the mechanisms through which environmental and social factors affect the group dynamics of a cooperatively breeding mammal.

    19. Trait-mediated functional responses: predator behavioural type mediates prey consumption

      Benjamin J. Toscano and Blaine D. Griffen

      Article first published online: 15 MAY 2014 | DOI: 10.1111/1365-2656.12236

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      Consistent individual variation in behaviour (i.e. behavioural types) is ubiquitous in predator populations, but the effects of behavioural types on the functional response remain uninvestigated. This study demonstrates size-dependent effects of individual crab activity level on the crab functional response to mussel prey density.

    20. Dual fuels: intra-annual variation in the relative importance of benthic and pelagic resources to maintenance, growth and reproduction in a generalist salmonid fish

      Brian Hayden, Chris Harrod and Kimmo K. Kahilainen

      Article first published online: 15 MAY 2014 | DOI: 10.1111/1365-2656.12233

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      This study highlights the dual importance of benthic invertebrates, which fuel winter survival, and pelagic zooplankton, which fuels summer growth, to the annual development of generalist fish. These results represent an important contribution to the ongoing debate regarding the relative importance of benthic and pelagic productivity to lake food webs.

    21. Ant functional responses along environmental gradients

      Xavier Arnan, Xim Cerdá and Javier Retana

      Article first published online: 13 MAY 2014 | DOI: 10.1111/1365-2656.12227

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      Relationships among traits, function and the environment are poorly understood in animals, where large databases are hardly available. This study is one of the first to analyse changes in a large number of animal functional traits along wide and different environmental gradients concurrently.

    22. Body size, carry-over effects and survival in a seasonal environment: consequences for population dynamics

      Gustavo S. Betini, Cortland K. Griswold, Livia Prodan and D. Ryan Norris

      Article first published online: 13 MAY 2014 | DOI: 10.1111/1365-2656.12225

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      Most populations live in seasonal environments, yet the implications of seasonality on population dynamics are not well understood. Here, we used a model system to show how variation in parental breeding density carries over to influence offspring survival during the non-breeding season and how this can stabilize long-term population dynamics.

    23. Cheetahs and wild dogs show contrasting patterns of suppression by lions

      Alexandra Swanson, Tim Caro, Harriet Davies-Mostert, Michael G. L. Mills, David W. Macdonald, Markus Borner, Emmanuel Masenga and Craig Packer

      Article first published online: 13 MAY 2014 | DOI: 10.1111/1365-2656.12231

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      African lions have contrasting effects on populations of cheetahs and wild dogs. Lions do not suppress cheetah populations despite inflicting considerable cub mortality, but their impacts on wild dogs are greater than previously supposed, explaining the disappearance of the iconic Serengeti dog population. Fine-scale avoidance behavior may allow apex-mesopredator coexistence.

    24. Predator avoidance during reproduction: diel movements by spawning sockeye salmon between stream and lake habitats

      Kale T. Bentley, Daniel E. Schindler, Timothy J. Cline, Jonathan B. Armstrong, Daniel Macias, Lindsy R. Ciepiela and Ray Hilborn

      Article first published online: 8 MAY 2014 | DOI: 10.1111/1365-2656.12223

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      Animals often face habitat-mediated trade-offs between reproductive success and predation risk. This study provides one of the first examples of individuals exploiting fine-scale habitat heterogeneity during reproduction through daily cyclic movements, which appears to be a strategy used by salmon to reduce predation risk by their principal predator, brown bears.

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