Blar i NTNU Open på forfatter "Pelabon, Christophe"
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Genetic and environmental effects on the scaling of metabolic rate with body size
Fossen, Erlend Ignacio Fleck; Pelabon, Christophe; Einum, Sigurd (Peer reviewed; Journal article, 2019)Metabolic rate (MR) often scales with body mass (BM) following a power function of the form MR=aBMb, where log(a) is the allometric intercept and b is the allometric exponent (i.e. slope on a log–log scale). The variational ... -
Genetic Variation in Metabolic Rate and Correlations with Other Energy Budget Components and Life History in Daphnia magna
Einum, Sigurd; Fossen, Erlend Ignacio Fleck; Parry, Victor; Pelabon, Christophe (Peer reviewed; Journal article, 2019)Much is known about the genetic variance in certain components of metabolism, most notably resting and maximum metabolic rate. This is in stark contrast to the lack of information on genetic variance in the metabolic rate ... -
Geographical variation in allometry in the guppy (Poecilia reticulata)
Egset, Camilla Kalvatn; Bolstad, Geir Hysing; Rosenqvist, Gunilla; Endler, John A; Pelabon, Christophe (Journal article; Peer reviewed, 2011)Variation in static allometry, the power relationship between character size and body size among individuals at similar developmental stages, remains poorly understood. We tested whether predation or other ecological factors ... -
How Does Spring Migration and Day Length Affect the Diving Ecology of a Capital Breeder Wintering at High Latitudes?
Kilen, Heidi (Master thesis, 2016)Foraging strategies in animals are influenced by conflicting constraints such as migration, reproduction and seasonal changes in the environment. Sea ducks are capital breeders and rely on endogenous reserves for reproduction. ... -
How to quantify thermal acclimation capacity?
Einum, Sigurd; Ratikainen, Irja Ida; Wright, Jonathan; Pelabon, Christophe; Bech, Claus; Jutfelt, Fredrik; Stawski, Clare; Burton, Tim (Peer reviewed; Journal article, 2019)The capacity of organisms to acclimate will influence their ability to cope with ongoing global changes in thermal regimes. Here we highlight methodological issues associated with recent attempts to quantify variation in ... -
Inbreeding effects in a mixed-mating vine: Effects of mating history, pollen competition and stress on the cost of inbreeding
Opedal, Øystein Hjorthol; Armbruster, William Scott; Pelabon, Christophe (Journal article; Peer reviewed, 2015)Inbreeding depression is assumed to be a central factor contributing to the stability of plant mating systems. Predicting the fitness consequence of inbreeding in natural populations is complicated, however, because it may ... -
Inferring temperature adaptation from thermal performance curves of somatic growth rate: The importance of growth measurements and mortality
Einum, Sigurd; Bartuseviciute, Vitalija; Fossen, Erlend Ignacio Fleck; Pelabon, Christophe (Peer reviewed; Journal article, 2022)When comparing somatic growth thermal performance curves (TPCs), higher somatic growth across experimental temperatures is often observed for populations originating from colder environments. Such countergradient variation ... -
Inter-sexual parental conflict over seed provisioning in a mixed-mating vine
Raunsgard, Astrid (Master thesis, 2017)1. Sexual reproduction creates an arena for inter-sexual parental conflict. When multiple paternity occurs, paternal plants are selected to exploit maternal plants for resources invested in their seeds, at the expense of ... -
Intersexual conflict over seed size is stronger in more outcrossed populations of a mixed-mating plant
Raunsgard, Astrid; Opedal, Øystein Hjorthol; Ekrem, Runa K; Wright, Jonathan; Bolstad, Geir Hysing; Armbruster, William Scott; Pelabon, Christophe (Journal article; Peer reviewed, 2018)In polyandrous species, fathers benefit from attracting greater maternal investment toward their offspring at the expense of the offspring of other males, while mothers should usually allocate resources equally among ... -
Invasive Species: Genetics, Characteristics and Trait Variation Along a Latitudinal Gradient
Acharya, Kamal Prasad (Doktoravhandlinger ved NTNU, 1503-8181; 2014:276, Doctoral thesis, 2014)Globalization during the second half of the 20th century has accelerated the introduction and the spread of non-native species. Introduced species is considered the second largest threat to biodiversity after habitat ... -
Measuring Complex Morphological Traits with 3D Photogrammetry: A Case Study with Deer Antlers
Tsuboi, Masahito; Kopperud, Bjørn Tore; Mayer, Christine; Grabowski, Mark Walter; Voje, Kjetil L.; Pelabon, Christophe; Hansen, Thomas F (Peer reviewed; Journal article, 2020)The increasing availability of 3D-imaging technology provides new opportunities for measuring morphology. Photogrammetry enables easy 3D-data acquisition compared to conventional methods and here we assess its accuracy for ... -
Mechanisms and evolution of thermal tolerance in fish
Andreassen, Anna Haukedal (Doctoral theses at NTNU;2023:392, Doctoral thesis, 2023)Global temperatures are rising and heat waves are becoming more frequent, reaching higher temperatures, and lasting longer. Many animals are living close to their limits for warming tolerance and mass mortality events are ... -
Mind the Wind: Microclimate Effects on Incubation Effort of an Arctic Seabird
Høyvik Hilde, Christoffer (Master thesis, 2015)1. The energetic costs of reproduction in birds strongly depend on the climate experienced during incubation. Climate change and increasing chance of extreme weather events may severely affect these costs, especially for ... -
Modelling allometry: Statistical and biological considerations – A reply to Packard
Pelabon, Christophe; Tidiere, M; Lemaitre, Jean-Francois; Gaillard, Jean Michel (Journal article; Peer reviewed, 2018)Allometry studies describe how phenotypic traits increase relative to the increase of the size of the organism. Given that the increase in size of an organism is attributable to growth, a multiplicative process, allometric ... -
No evidence that seed predators constrain pollinator-mediated trait evolution in a tropical vine
Opedal, Øystein Hjorthol; Albertsen, Elena; Perez-Barrales, Rocio; Armbruster, W.Scott; Pelabon, Christophe (Journal article; Peer reviewed, 2019)Turnover in biotic communities across heterogeneous landscapes is expected to lead to variation in interactions among plants, their mutualists, and their antagonists. Across a fragmented landscape in northern Costa Rica, ... -
Novel microsatellite markers for Dalechampia scandens(Euphorbiaceae) and closely related taxa:application to studying a species complex
Falahati-Anbaran, Mohsen; Stenøien, Hans K.; Bolstad, Geir Hysing; Hansen, Thomas F; Pérez‐Barrales, Rocio; Armbruster, William Scott; Pelabon, Christophe (Journal article; Peer reviewed, 2016)We developed novel microsatellite markers for D alechampia scandens L. (Euphorbiaceae). The target plants belong to a distinct, but undescribed, species in the D . scandens species complex, characterized by small resin-producing ... -
On the relationship between ontogenetic and static allometry
Pelabon, Christophe; Bolstad, Geir Hysing; Egset, Camilla Kalvatn; Cheverud, James M.; Pavlicev, Mihaela; Rosenqvist, Gunilla (Journal article; Peer reviewed, 2013)Ontogenetic and static allometries describe how a character changes in size when the size of the organism changes during ontogeny and among individuals measured at the same developmental stage, respectively. Understanding ... -
On the use of the coefficient of variation to quantify and compare trait variation
Pelabon, Christophe; Hilde, Christoffer Høyvik; Einum, Sigurd; Gamelon, Marlène (Peer reviewed; Journal article, 2020)Meaningful comparison of variation in quantitative trait requires controlling for both the dimension of the varying entity and the dimension of the factor generating variation. Although the coefficient of variation (CV; ... -
Ornamentation and Characteristics of the Tail in the Male Guppy
Slåtten, May Helen Rong (Master thesis, 2014)Male guppies (Poecilia reticulata) show great variation in both shape and coloration of the caudal fin. In some males, an elongation of the caudal fin is present, referred to as a sword. This thesis will mainly focus on ... -
Physiological plasticity and evolution of thermal performance in zebrafish
Morgan, Rachael (Doctoral theses at NTNU;2020:68, Doctoral thesis, 2020)Climate change is increasing mean and extreme temperatures globally. For aquatic ectotherms, such as fish, increasing temperatures will directly affect their thermalperformance and challenge their upper thermal limits. ...