TY  - JOUR
A1  - Andersson, Matilda L.
A1  - Scharnweber, Inga Kristin
A1  - Eklöv, Peter
T1  - The interaction between metabolic rate, habitat choice, and resource use in a polymorphic freshwater species
JF  - Ecology and evolution
N2  - Resource polymorphism is common across taxa and can result in alternate ecotypes with specific morphologies, feeding modes, and behaviors that increase performance in a specific habitat. This can result in high intraspecific variation in the expression of specific traits and the extent to which these traits are correlated within a single population. Although metabolic rate influences resource acquisition and the overall pace of life of individuals it is not clear how metabolic rate interacts with the larger suite of traits to ultimately determine individual fitness. We examined the relationship between metabolic rates and the major differences (habitat use, morphology, and resource use) between littoral and pelagic ecotypes of European perch (Perca fluviatilis) from a single lake in Central Sweden. Standard metabolic rate (SMR) was significantly higher in pelagic perch but did not correlate with resource use or morphology. Maximum metabolic rate (MMR) was not correlated with any of our explanatory variables or with SMR. Aerobic scope (AS) showed the same pattern as SMR, differing across habitats, but contrary to expectations, was lower in pelagic perch. This study helps to establish a framework for future experiments further exploring the drivers of intraspecific differences in metabolism. In addition, since metabolic rates scale with temperature and determine predator energy requirements, our observed differences in SMR across habitats will help determine ecotype-specific vulnerabilities to climate change and differences in top-down predation pressure across habitats.
KW  - intraspecific variation
KW  - metabolic rate
KW  - morphometrics
KW  - Perca
KW  - fluviatilis
KW  - plasticity
KW  - resource use
KW  - respirometry
KW  - stable isotopes
Y1  - 2022
U6  - https://doi.org/10.1002/ece3.9129
SN  - 2045-7758
VL  - 12
IS  - 8
PB  - Wiley
CY  - Hoboken
ER  - 
TY  - JOUR
A1  - Olas, Justyna Jadwiga
A1  - Fichtner, Franziska
A1  - Apelt, Federico
T1  - All roads lead to growth
BT  - imaging-based and biochemical methods to measure plant growth
JF  - Journal of experimental botany
N2  - Plant growth is a highly complex biological process that involves innumerable interconnected biochemical and signalling pathways. Many different techniques have been developed to measure growth, unravel the various processes that contribute to plant growth, and understand how a complex interaction between genotype and environment determines the growth phenotype. Despite this complexity, the term 'growth' is often simplified by researchers; depending on the method used for quantification, growth is viewed as an increase in plant or organ size, a change in cell architecture, or an increase in structural biomass. In this review, we summarise the cellular and molecular mechanisms underlying plant growth, highlight state-of-the-art imaging and non-imaging-based techniques to quantitatively measure growth, including a discussion of their advantages and drawbacks, and suggest a terminology for growth rates depending on the type of technique used.
KW  - biomass
KW  - growth
KW  - imaging
KW  - kinematics
KW  - morphometrics
KW  - phenomics
KW  - phenotyping
KW  - relative expansion rate of growth (RER)
KW  - relative growth
KW  - rate (RGR)
Y1  - 2019
U6  - https://doi.org/10.1093/jxb/erz406
SN  - 0022-0957
SN  - 1460-2431
VL  - 71
IS  - 1
SP  - 11
EP  - 21
PB  - Oxford Univ. Press
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Reinhard, Sandy
A1  - Kupfer, Alexander
T1  - Sexual dimorphism in a French population of the marbled newt, Triturus marmoratus (Urodela: Salamandridae)
JF  - Salamandra : German journal of herpetology
N2  - Amphibians have developed a large set of life-history strategies and demonstrate an impressive diversity of reproductive patterns compared to other vertebrates. Various selection pressures impact on males and females and see them produce different degrees of sexual dimorphism in order to maximise their reproductive success. In an extended morphometric analysis that included 27 body-and head-related characters, we studied the pattern of sexual dimorphism of a French population of the marbled newt, Triturus marmoratus. We analysed the characters by employing GLM methods (ANCOVA) and found 16 of them to be dimorphic between the sexes. In general, females differ in head-body size, such as snout-vent length, but males rather in shape or body proportions (e.g., limb proportions). The various expressions of sexual size dimorphism among large-bodied marbled newts and allies demonstrate that more than one evolutionary model works simultaneously on different traits.
KW  - SSD
KW  - fecundity
KW  - sexual selection
KW  - salamanders
KW  - Triturus
KW  - morphometrics
Y1  - 2015
SN  - 0036-3375
VL  - 51
IS  - 2
SP  - 121
EP  - 128
PB  - Deutsche Gesellschaft für Herpetologie und Terrarienkunde
CY  - Darmstadt
ER  -