TY  - JOUR
A1  - Haemaelaeinen, Anni
A1  - Dammhahn, Melanie
A1  - Aujard, Fabienne
A1  - Eberle, Manfred
A1  - Hardy, Isabelle
A1  - Kappeler, Peter M.
A1  - Perret, Martine
A1  - Schliehe-Diecks, Susanne
A1  - Kraus, Cornelia
T1  - Senescence or selective disappearance? Age trajectories of body mass in wild and captive populations of a small-bodied primate
JF  - Proceedings of the Royal Society of London : B, Biological sciences
N2  - Classic theories of ageing consider extrinsic mortality (EM) a major factor in shaping longevity and ageing, yet most studies of functional ageing focus on species with low EM. This bias may cause overestimation of the influence of senescent declines in performance over condition-dependent mortality on demographic processes across taxa. To simultaneously investigate the roles of functional senescence (FS) and intrinsic, extrinsic and condition-dependent mortality in a species with a high predation risk in nature, we compared age trajectories of body mass (BM) in wild and captive grey mouse lemurs (Microcebus murinus) using longitudinal data (853 individuals followed through adulthood). We found evidence of non-random mortality in both settings. In captivity, the oldest animals showed senescence in their ability to regain lost BM, whereas no evidence of FS was found in the wild. Overall, captive animals lived longer, but a reversed sex bias in lifespan was observed between wild and captive populations. We suggest that even moderately condition-dependent EM may lead to negligible FS in the wild. While high EM may act to reduce the average lifespan, this evolutionary process may be counteracted by the increased fitness of the long-lived, high-quality individuals.
KW  - functional senescence
KW  - body mass
KW  - condition-dependent mortality
KW  - life-history evolution
KW  - lifespan
KW  - sex difference
Y1  - 2014
U6  - https://doi.org/10.1098/rspb.2014.0830
SN  - 0962-8452
SN  - 1471-2954
VL  - 281
IS  - 1791
PB  - Royal Society
CY  - London
ER  - 
TY  - JOUR
A1  - Tucker, Marlee A.
A1  - Boehning-Gaese, Katrin
A1  - Fagan, William F.
A1  - Fryxell, John M.
A1  - Van Moorter, Bram
A1  - Alberts, Susan C.
A1  - Ali, Abdullahi H.
A1  - Allen, Andrew M.
A1  - Attias, Nina
A1  - Avgar, Tal
A1  - Bartlam-Brooks, Hattie
A1  - Bayarbaatar, Buuveibaatar
A1  - Belant, Jerrold L.
A1  - Bertassoni, Alessandra
A1  - Beyer, Dean
A1  - Bidner, Laura
A1  - van Beest, Floris M.
A1  - Blake, Stephen
A1  - Blaum, Niels
A1  - Bracis, Chloe
A1  - Brown, Danielle
A1  - de Bruyn, P. J. Nico
A1  - Cagnacci, Francesca
A1  - Calabrese, Justin M.
A1  - Camilo-Alves, Constanca
A1  - Chamaille-Jammes, Simon
A1  - Chiaradia, Andre
A1  - Davidson, Sarah C.
A1  - Dennis, Todd
A1  - DeStefano, Stephen
A1  - Diefenbach, Duane
A1  - Douglas-Hamilton, Iain
A1  - Fennessy, Julian
A1  - Fichtel, Claudia
A1  - Fiedler, Wolfgang
A1  - Fischer, Christina
A1  - Fischhoff, Ilya
A1  - Fleming, Christen H.
A1  - Ford, Adam T.
A1  - Fritz, Susanne A.
A1  - Gehr, Benedikt
A1  - Goheen, Jacob R.
A1  - Gurarie, Eliezer
A1  - Hebblewhite, Mark
A1  - Heurich, Marco
A1  - Hewison, A. J. Mark
A1  - Hof, Christian
A1  - Hurme, Edward
A1  - Isbell, Lynne A.
A1  - Janssen, Rene
A1  - Jeltsch, Florian
A1  - Kaczensky, Petra
A1  - Kane, Adam
A1  - Kappeler, Peter M.
A1  - Kauffman, Matthew
A1  - Kays, Roland
A1  - Kimuyu, Duncan
A1  - Koch, Flavia
A1  - Kranstauber, Bart
A1  - LaPoint, Scott
A1  - Leimgruber, Peter
A1  - Linnell, John D. C.
A1  - Lopez-Lopez, Pascual
A1  - Markham, A. Catherine
A1  - Mattisson, Jenny
A1  - Medici, Emilia Patricia
A1  - Mellone, Ugo
A1  - Merrill, Evelyn
A1  - Mourao, Guilherme de Miranda
A1  - Morato, Ronaldo G.
A1  - Morellet, Nicolas
A1  - Morrison, Thomas A.
A1  - Diaz-Munoz, Samuel L.
A1  - Mysterud, Atle
A1  - Nandintsetseg, Dejid
A1  - Nathan, Ran
A1  - Niamir, Aidin
A1  - Odden, John
A1  - Oliveira-Santos, Luiz Gustavo R.
A1  - Olson, Kirk A.
A1  - Patterson, Bruce D.
A1  - de Paula, Rogerio Cunha
A1  - Pedrotti, Luca
A1  - Reineking, Bjorn
A1  - Rimmler, Martin
A1  - Rogers, Tracey L.
A1  - Rolandsen, Christer Moe
A1  - Rosenberry, Christopher S.
A1  - Rubenstein, Daniel I.
A1  - Safi, Kamran
A1  - Said, Sonia
A1  - Sapir, Nir
A1  - Sawyer, Hall
A1  - Schmidt, Niels Martin
A1  - Selva, Nuria
A1  - Sergiel, Agnieszka
A1  - Shiilegdamba, Enkhtuvshin
A1  - Silva, Joao Paulo
A1  - Singh, Navinder
A1  - Solberg, Erling J.
A1  - Spiegel, Orr
A1  - Strand, Olav
A1  - Sundaresan, Siva
A1  - Ullmann, Wiebke
A1  - Voigt, Ulrich
A1  - Wall, Jake
A1  - Wattles, David
A1  - Wikelski, Martin
A1  - Wilmers, Christopher C.
A1  - Wilson, John W.
A1  - Wittemyer, George
A1  - Zieba, Filip
A1  - Zwijacz-Kozica, Tomasz
A1  - Mueller, Thomas
T1  - Moving in the Anthropocene
BT  - global reductions in terrestrial mammalian movements
JF  - Science
N2  - Animal movement is fundamental for ecosystem functioning and species survival, yet the effects of the anthropogenic footprint on animal movements have not been estimated across species. Using a unique GPS-tracking database of 803 individuals across 57 species, we found that movements of mammals in areas with a comparatively high human footprint were on average one-half to one-third the extent of their movements in areas with a low human footprint. We attribute this reduction to behavioral changes of individual animals and to the exclusion of species with long-range movements from areas with higher human impact. Global loss of vagility alters a key ecological trait of animals that affects not only population persistence but also ecosystem processes such as predator-prey interactions, nutrient cycling, and disease transmission.
Y1  - 2018
U6  - https://doi.org/10.1126/science.aam9712
SN  - 0036-8075
SN  - 1095-9203
VL  - 359
IS  - 6374
SP  - 466
EP  - 469
PB  - American Assoc. for the Advancement of Science
CY  - Washington
ER  - 
TY  - JOUR
A1  - Pechouskova, Eva
A1  - Dammhahn, Melanie
A1  - Brameier, Markus
A1  - Fichtel, Claudia
A1  - Kappeler, Peter M.
A1  - Huchard, Elise
T1  - MHC class II variation in a rare and ecological specialist mouse lemur reveals lower allelic richness and contrasting selection patterns compared to a generalist and widespread sympatric congener
JF  - Immunogenetics
N2  - The polymorphism of immunogenes of the major histocompatibility complex (MHC) is thought to influence the functional plasticity of immune responses and, consequently, the fitness of populations facing heterogeneous pathogenic pressures. Here, we evaluated MHC variation (allelic richness and divergence) and patterns of selection acting on the two highly polymorphic MHC class II loci (DRB and DQB) in the endangered primate Madame Berthe's mouse lemur (Microcebus berthae). Using 454 pyrosequencing, we examined MHC variation in a total of 100 individuals sampled over 9 years in Kirindy Forest, Western Madagascar, and compared our findings with data obtained previously for its sympatric congener, the grey mouse lemur (Microcebus murinus). These species exhibit a contrasting ecology and demography that were expected to affect MHC variation and molecular signatures of selection. We found a lower allelic richness concordant with its low population density, but a similar level of allelic divergence and signals of historical selection in the rare feeding specialist M. berthae compared to the widespread generalist M. murinus. These findings suggest that demographic factors may exert a stronger influence than pathogen-driven selection on current levels of allelic richness in M. berthae. Despite a high sequence similarity between the two congeners, contrasting selection patterns detected at DQB suggest its potential functional divergence. This study represents a first step toward unravelling factors influencing the adaptive divergence of MHC genes between closely related but ecologically differentiated sympatric lemurs and opens new questions regarding potential functional discrepancy that would explain contrasting selection patterns detected at DQB.
KW  - Primates
KW  - Cheirogaleidae
KW  - Microcebus berthae
KW  - 454 pyrosequencing
Y1  - 2015
U6  - https://doi.org/10.1007/s00251-015-0827-4
SN  - 0093-7711
SN  - 1432-1211
VL  - 67
IS  - 4
SP  - 229
EP  - 245
PB  - Springer
CY  - New York
ER  - 
TY  - JOUR
A1  - Noonan, Michael J.
A1  - Tucker, Marlee A.
A1  - Fleming, Christen H.
A1  - Akre, Thomas S.
A1  - Alberts, Susan C.
A1  - Ali, Abdullahi H.
A1  - Altmann, Jeanne
A1  - Antunes, Pamela Castro
A1  - Belant, Jerrold L.
A1  - Beyer, Dean
A1  - Blaum, Niels
A1  - Boehning-Gaese, Katrin
A1  - Cullen Jr, Laury
A1  - de Paula, Rogerio Cunha
A1  - Dekker, Jasja
A1  - Drescher-Lehman, Jonathan
A1  - Farwig, Nina
A1  - Fichtel, Claudia
A1  - Fischer, Christina
A1  - Ford, Adam T.
A1  - Goheen, Jacob R.
A1  - Janssen, Rene
A1  - Jeltsch, Florian
A1  - Kauffman, Matthew
A1  - Kappeler, Peter M.
A1  - Koch, Flavia
A1  - LaPoint, Scott
A1  - Markham, A. Catherine
A1  - Medici, Emilia Patricia
A1  - Morato, Ronaldo G.
A1  - Nathan, Ran
A1  - Oliveira-Santos, Luiz Gustavo R.
A1  - Olson, Kirk A.
A1  - Patterson, Bruce D.
A1  - Paviolo, Agustin
A1  - Ramalho, Emiliano Estero
A1  - Rosner, Sascha
A1  - Schabo, Dana G.
A1  - Selva, Nuria
A1  - Sergiel, Agnieszka
A1  - da Silva, Marina Xavier
A1  - Spiegel, Orr
A1  - Thompson, Peter
A1  - Ullmann, Wiebke
A1  - Zieba, Filip
A1  - Zwijacz-Kozica, Tomasz
A1  - Fagan, William F.
A1  - Mueller, Thomas
A1  - Calabrese, Justin M.
T1  - A comprehensive analysis of autocorrelation and bias in home range estimation
JF  - Ecological monographs : a publication of the Ecological Society of America.
N2  - Home range estimation is routine practice in ecological research. While advances in animal tracking technology have increased our capacity to collect data to support home range analysis, these same advances have also resulted in increasingly autocorrelated data. Consequently, the question of which home range estimator to use on modern, highly autocorrelated tracking data remains open. This question is particularly relevant given that most estimators assume independently sampled data. Here, we provide a comprehensive evaluation of the effects of autocorrelation on home range estimation. We base our study on an extensive data set of GPS locations from 369 individuals representing 27 species distributed across five continents. We first assemble a broad array of home range estimators, including Kernel Density Estimation (KDE) with four bandwidth optimizers (Gaussian reference function, autocorrelated‐Gaussian reference function [AKDE], Silverman's rule of thumb, and least squares cross‐validation), Minimum Convex Polygon, and Local Convex Hull methods. Notably, all of these estimators except AKDE assume independent and identically distributed (IID) data. We then employ half‐sample cross‐validation to objectively quantify estimator performance, and the recently introduced effective sample size for home range area estimation ( N̂ area
) to quantify the information content of each data set. We found that AKDE 95% area estimates were larger than conventional IID‐based estimates by a mean factor of 2. The median number of cross‐validated locations included in the hold‐out sets by AKDE 95% (or 50%) estimates was 95.3% (or 50.1%), confirming the larger AKDE ranges were appropriately selective at the specified quantile. Conversely, conventional estimates exhibited negative bias that increased with decreasing N̂ area. To contextualize our empirical results, we performed a detailed simulation study to tease apart how sampling frequency, sampling duration, and the focal animal's movement conspire to affect range estimates. Paralleling our empirical results, the simulation study demonstrated that AKDE was generally more accurate than conventional methods, particularly for small N̂ area. While 72% of the 369 empirical data sets had >1,000 total observations, only 4% had an N̂ area >1,000, where 30% had an N̂ area <30. In this frequently encountered scenario of small N̂ area, AKDE was the only estimator capable of producing an accurate home range estimate on autocorrelated data.
KW  - animal movement
KW  - kernel density estimation
KW  - local convex hull
KW  - minimum convex polygon
KW  - range distribution
KW  - space use
KW  - telemetry
KW  - tracking data
Y1  - 2018
U6  - https://doi.org/10.1002/ecm.1344
SN  - 0012-9615
SN  - 1557-7015
VL  - 89
IS  - 2
PB  - Wiley
CY  - Hoboken
ER  -