Jip J. C. Ramakers

ORCID: 0000-0002-0617-930X
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About
Contact & Profiles
Research Areas
  • Animal Behavior and Reproduction
  • Bat Biology and Ecology Studies
  • Plant and animal studies
  • Species Distribution and Climate Change
  • Ecology and Vegetation Dynamics Studies
  • Genetic and phenotypic traits in livestock
  • Impact of Light on Environment and Health
  • Marine animal studies overview
  • Genetic diversity and population structure
  • Animal Vocal Communication and Behavior
  • Avian ecology and behavior
  • Animal Ecology and Behavior Studies
  • Wildlife Ecology and Conservation
  • Neurobiology and Insect Physiology Research
  • Cognitive Abilities and Testing
  • Psychometric Methodologies and Testing
  • Neural Networks and Applications
  • Circadian rhythm and melatonin
  • Genetics and Plant Breeding
  • Physiological and biochemical adaptations
  • Mental Health Research Topics
  • Insect-Plant Interactions and Control
  • Genetics, Aging, and Longevity in Model Organisms
  • Advanced Causal Inference Techniques
  • Data Analysis with R

Wageningen University & Research
2019-2025

Netherlands Institute of Ecology
2016-2019

Smithsonian Tropical Research Institute
2016

Utrecht University
2016

Van Hall Larenstein University of Applied Sciences
2014

Artificial light at night has shown a remarkable increase over the past decades. Effects are reported for many species groups, and include changes in presence, behaviour, physiology life-history traits. Among these, bats strongly affected, how bat react to is likely vary with colour. Different spectra may therefore be applied reduce negative impacts. We used unique set-up of eight field sites study response three different experimental an otherwise dark undisturbed natural habitat. measured...

10.1098/rspb.2017.0075 article EN Proceedings of the Royal Society B Biological Sciences 2017-05-31

Phenotypic plasticity is an important mechanism for populations to respond fluctuating environments, yet may be insufficient adapt a directionally changing environment. To study whether can evolve under current climate change, we quantified selection and genetic variation in both the elevation (RNE ) slope (RNS of breeding time reaction norm long-term (1973-2016) population great tits (Parus major). The optimal RNE (the caterpillar biomass peak date regressed against temperature used as cue...

10.1111/evo.13660 article EN Evolution 2018-12-17

Penalized factorial regression offers a computationally attractive alternative to kernel and deep learning methods for prediction of genotype by environment interactions. For two representative data sets on wheat maize, accuracies were comparable, while computing requirements time clearly lower. A longstanding challenge in plant breeding genetics is the yield new environments presence interaction ( G×E ). The genotypes this case are promising candidate varieties at an advanced stage programs...

10.1007/s00122-025-04865-4 article EN cc-by Theoretical and Applied Genetics 2025-03-28

<title>Abstract</title> Wheat and maize productivity gains depend on accurate estimates of genetic trends, genotypic effects (G), genotype-by-environment interactions (GEI). Here, we compiled a unique European Value for Cultivation Use (VCU) database wheat (2003–2018) to estimate G GEI magnitudes, variety-testing precision in grain yield using mixed-model methodology. We found that variances were comparable across Europe, with variety-comparison precisions 0.29–0.56 t ha<sup>-1</sup> (wheat)...

10.21203/rs.3.rs-6221922/v1 preprint EN Research Square (Research Square) 2025-04-16

Global climate change has sparked a vast research effort into the demographic and evolutionary consequences of mismatches between consumer resource phenology. Many studies have used difference in peak dates to quantify phenological synchrony (match dates, MD), but this approach been suggested be inconclusive, since it does not incorporate temporal overlap distributions overlap, MO). We 24 years detailed data on phenology predator-prey system, great tit (Parus major) main food for its...

10.1111/1365-2656.13143 article EN cc-by Journal of Animal Ecology 2019-11-06

Phenotypic plasticity is a central topic in ecology and evolution. Individuals may differ the degree of (individual-by-environment interaction (I × E)), which has implications for capacity populations to respond selection. Random regression models (RRMs) are popular tool study I E behavioural or life-history traits, yet evidence mixed, differing between species, populations, even studies on same population. One important source discrepancies treatment heterogeneity residual variance...

10.1111/jeb.13571 article EN cc-by Journal of Evolutionary Biology 2019-11-20

Abstract Progressive illumination at night poses an increasing threat to species worldwide. Light is particularly problematic for bats as most are nocturnal and often cross relatively large distances when commuting between roosts foraging grounds. Earlier studies have shown that of linear structures in the landscape disturbs bats, response light may strongly depend on spectrum. Here, we studied impact white, green, red Daubenton's ( Myotis daubentonii ). We used a unique location where road...

10.1002/jez.2178 article EN cc-by Journal of Experimental Zoology Part A Ecological and Integrative Physiology 2018-05-29

Global warming has shifted phenological traits in many species, but whether species are able to track further increasing temperatures depends on the fitness consequences of additional shifts traits. To test this, we measured phenology and great tits (Parus major) with genotypes for extremely early late egg lay dates, obtained from a genomic selection experiment. Females advanced dates relative females genotypes, not nonselected females. did differ number fledglings produced, line weak effect...

10.1126/sciadv.ade6350 article EN cc-by-nc Science Advances 2023-06-07

Circadian rhythms are ubiquitous among taxa and essential for coping with recurrent daily events, leading to selection on the properties of clock underlying these rhythms. To quantify this in wild, we need, however, phenotype wild individuals, which is difficult using standard laboratory approach individuals need be kept under constant conditions. overcome problem, explored possibility link variation a key property, circadian period (Tau), genetic variation. We measured Tau 152 captive great...

10.3389/fevo.2019.00152 article EN cc-by Frontiers in Ecology and Evolution 2019-05-03

Despite ample evidence for the presence of maternal effects (MEs) in a variety traits and strong theoretical indications their evolutionary consequences, empirical to what extent MEs can influence responses selection remains ambiguous. We tested degree which alter rate adaptation key life-history trait, clutch size, using an individual-based model approach parameterized with experimental data from long-term study great tits (Parus major). modeled two types MEs: (i) environmentally plastic...

10.1086/696847 article EN cc-by-nc The American Naturalist 2018-03-26

Many traits are phenotypically plastic, i.e. the same genotype expresses different phenotypes depending on environment. Genotypes and individuals can vary in their response to environment this genetic (G × E) individual (I variation reaction‐norm slopes have important ecological or evolutionary consequences. Studies I E/G E often fail show slope variation, potentially due choice of environmental covariate. Identifying genuine driver phenotypic plasticity (the cue) is practically impossible...

10.1111/oik.09592 article EN cc-by Oikos 2023-10-03
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