Search results for "fysiologiset tekijät"

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Sex roles and sex ratios in animals

2022

In species with separate sexes, females and males often differ in their morphology, physiology and behaviour. Such sex-specific traits are functionally linked to variation in reproductive competition, mate choice and parental care, which have all been linked to sex roles. At the 150th anniversary of Darwin's theory on sexual selection, the question of why patterns of sex roles vary within and across species remains a key topic in behavioural and evolutionary ecology. New theoretical, experimental and comparative evidence suggests that variation in the adult sex ratio (ASR) is a key driver of variation in sex roles. Here, we first define and discuss the historical emergence of the sex role c…

Sex Ratio [MeSH] ; Female [MeSH] ; demography ; sex ratios ; Animals [MeSH] ; Gender Role [MeSH] ; mate choice ; General Biochemistry Genetics and Molecular Biology ; Sexual Behavior Animal/physiology [MeSH] ; Biological Evolution [MeSH] ; General Agricultural and Biological Sciences ; physiology ; parental care ; Male [MeSH] ; sexual selection ; Reproduction [MeSH] ; Sex Characteristics [MeSH] ; sex rolesdemographydemography; mate choice; parental care; physiology; sex ratios; sex roles; sexual selectionfysiologiasex ratiosparental carefysiologiset tekijätseksuaalinen käyttäytymineneläinten käyttäytyminenGeneral Biochemistry Genetics and Molecular Biologyvalintakriteeritsex rolessukupuoliroolitphysiologyeläimetsexual selectionmate choiceGeneral Agricultural and Biological Scienceskäyttäytyminen
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The Effects of Individual Characteristics of the Naval Personnel on Sleepiness and Stress during Two Different Watchkeeping Schedules

2022

Background: Naval service can have a significant impact on the wellbeing of seafarers, and the operation of warships is highly dependent on the personnel on board. Nevertheless, there is a lack of knowledge concerning the impact of seafarers’ individual characteristics on their wellbeing in a naval environment. Therefore, the aim of this study was to investigate individual characteristics of the naval personnel that may be associated with the amount of sleepiness, fatigue and stress responses experienced during shift work and irregular working hours in a naval environment. Methods: The study took place on a Finnish Defence Forces’ Navy missile patrol boat on which 18 crewmembers served as s…

SleepinessväsymysHealth Toxicology and Mutagenesiswatchkeeping3121 Internal medicinesleepinessepätyypillinen työstressvartioveneetWork Schedule ToleranceHumansWakefulnessNaval MedicineFatigueShipsindividual characteristicsirregular working hoursindividual characteristics; individual factors; shift work; watchkeeping; irregular working hours; sleepiness; fatigue; stress; navyPublic Health Environmental and Occupational Healthfysiologiset tekijätstressiindividual factorsHormonesshift worktyön kuormittavuusvuorotyömerivoimatfatiguenavyyksilöllisyysSleepInternational Journal of Environmental Research and Public Health
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