S. Ruuskanen

Seasonal and environmental factors contribute to the variation in the gut microbiome: a large-scale study of a small bird

This study examines seasonal and environmental factors influencing gut microbiome variation in wild great tits across their range, finding higher diversity in winter and some habitat-related differences.

Permeabilization status affects the relationship between basal metabolic rate and mitochondrial respiration in great tit blood cells

Early-life environmental effects on mitochondrial aerobic metabolism: an experimental brood size manipulation in wild great tits

This study examines how brood size manipulation affects mitochondrial metabolism and ROS production in great tit chicks, finding no significant long-term effects but noting size-related metabolic differences.

Can increased prenatal exposure to thyroid hormones alter physiology and behaviour in the long-term? Insights from an experimental study in Japanese quails.

This study investigates the long-term effects of maternal thyroid hormone exposure on Japanese quail behavior, plasma hormone levels, and brain gene expression, finding no significant effects.

From maternal glucocorticoid and thyroid hormones to epigenetic regulation of gene expression: an experimental study in a wild bird species

This study examines how prenatal exposure to maternal glucocorticoids and thyroid hormones affects offspring stress response, DNA methylation, and gene expression in great tits.

Population divergence in maternal investment and embryo energy use and allocation reveals adaptive responses to cool climates

This study examines how wall lizards adapt to cool climates by analyzing maternal investment and embryo energy use and allocation across altitudinal regions.

No evidence for associations between brood size, gut microbiome diversity and survival in great tit (Parus major) nestlings

The paper investigates if brood size affects gut microbiome diversity and survival in great tit nestlings but finds no significant associations.

Prenatal thyroid hormones accelerate postnatal growth and telomere shortening in wild great tits

This study investigates how prenatal thyroid hormones affect postnatal growth, telomere shortening, and survival in wild great tits, finding accelerated growth but no immediate telomere length changes.

From climate warming to accelerated cellular ageing: an experimental heating study in a wild passerine bird

This study shows that increased early-life temperature in great tits accelerates telomere shortening, potentially reducing survival, without affecting growth or fledging survival.

Is maternal thyroid hormone deposition subject to a trade-off between self and egg because of iodine? An experimental study in rock pigeon

This study investigates whether iodine restriction affects maternal thyroid hormone production and transfer to eggs in rock pigeons, finding reduced egg production but no change in hormone levels.

Does arsenic contamination affect DNA methylation patterns in a wild bird population? An experimental approach

This study investigates the effects of early-life arsenic exposure on DNA methylation in wild great tits, finding limited differential methylation at five CpG sites.

Adaptation of bacteria to glyphosate: a microevolutionary perspective of the enzyme 5-enolpyruvylshikimate 3-phosphate (EPSP) synthase

The paper shows bacteria develop glyphosate resistance through EPSPS active site changes, highlighting ecological and microbiome impacts of glyphosate.

Testing for context-dependent effects of maternal thyroid hormones on offspring survival and physiology: an experimental approach manipulating temperature in a wild bird species

This study tests if maternal thyroid hormones affect offspring survival and physiology in a temperature-dependent manner in wild birds, finding no clear context-dependent effects.

Born to be young: prenatal thyroid hormones increase early-life telomere length

This study shows that prenatal thyroid hormone exposure in birds increases telomere length and may influence longevity by affecting biological age at birth.

Elevated exposure to prenatal thyroid hormones affects embryonic mortality but has no clear effects into adulthood

This study examines the short- and long-term effects of prenatal thyroid hormone exposure in Japanese quail, finding increased hatching success but no clear long-term impacts.

Testing different forms of regulation of yolk thyroid hormone transfer in pied flycatchers

The study investigates maternal regulation of thyroid hormone transfer to eggs in pied flycatchers by manipulating T4 levels and measuring T3 changes, finding mothers can regulate T4 to T3 conversion but not follicle-level control.

Experimental copper exposure, but not heat stress, leads to elevated intraovarian thyroid hormone levels

The paper shows that copper exposure increases ovarian thyroid hormone levels in sticklebacks, while heat stress does not.

Parental effects via glyphosate-based herbicides in a bird model?

This study investigates the effects of glyphosate-based herbicides on bird offspring through parental exposure, finding reduced embryonic development and increased oxidative damage.

Maternally-transferred thyroid hormones and life-history variation in birds

This study examines the relationship between maternal thyroid hormone levels in bird eggs and life-history traits across 34 species, finding higher TH concentrations in migratory and precocial species.

Plastic but repeatable: rapid adjustments of mitochondrial function and density during reproduction in a wild bird species

The paper measures mitochondrial function and density in wild pied flycatchers during different reproductive stages, finding both repeatability and rapid plasticity in these traits.

Prenatal thyroid hormone exposure increases growth but not oxidative stress in a wild passerine species

This study shows that maternal thyroid hormone transfer increases nestling growth without increasing oxidative stress in a wild passerine bird.